Build LiteRT for Android | Google AI Edge

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track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > API Reference </span> <span class="devsite-nav-icon material-icons" data-icon="forward" > </span> </a> </li> </ul> </li> <li class="devsite-nav-item"> <span class="devsite-nav-title" tooltip data-category="Site-Wide Custom Events" data-label="Tab: Tools" track-name="tools" > <span class="devsite-nav-text" tooltip > Tools </span> </span> <ul class="devsite-nav-responsive-tabs devsite-nav-has-menu "> <li class="devsite-nav-item"> <span class="devsite-nav-title" tooltip data-category="Site-Wide Custom Events" data-label="Tab: Tools" track-name="tools" > <span class="devsite-nav-text" tooltip menu="Tools"> More </span> <span class="devsite-nav-icon material-icons" data-icon="forward" menu="Tools"> </span> </span> </li> </ul> </li> <li class="devsite-nav-item"> <a href="https://discuss.ai.google.dev/" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Tab: Community" track-name="community" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Community" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Community </span> </a> </li> </ul> </div> <div class="devsite-mobile-nav-bottom"> <ul class="devsite-nav-list" menu="_book"> <li class="devsite-nav-item"><a href="/edge/litert" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/edge/litert/inference" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/inference" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/inference" ><span class="devsite-nav-text" tooltip>Get started</span></a></li> <li class="devsite-nav-item"><a href="/edge/litert/migration" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/migration" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/migration" ><span class="devsite-nav-text" tooltip>Migrating from TensorFlow Lite</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Models</span> </div></li> <li class="devsite-nav-item"><a href="/edge/litert/models/convert_to_flatbuffer" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/convert_to_flatbuffer" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/convert_to_flatbuffer" ><span class="devsite-nav-text" tooltip>Support multiple frameworks</span></a></li> <li class="devsite-nav-item"><a href="/edge/litert/models/trained" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/trained" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/trained" ><span class="devsite-nav-text" tooltip>Use trained models</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Convert TensorFlow models</span> </div></li> <li class="devsite-nav-item"><a href="/edge/litert/models/convert" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/convert" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/convert" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/edge/litert/models/convert_tf" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/convert_tf" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/convert_tf" ><span class="devsite-nav-text" tooltip>Convert TensorFlow models</span></a></li> <li class="devsite-nav-item devsite-nav-experimental"><a href="/edge/litert/models/signatures" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/signatures" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/signatures" ><span class="devsite-nav-text" tooltip>Add Signatures</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span></a></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Conversion tools</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item devsite-nav-experimental"><a href="/edge/litert/models/model_analyzer" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/model_analyzer" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/model_analyzer" ><span class="devsite-nav-text" tooltip>Model Analyzer</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span></a></li><li class="devsite-nav-item devsite-nav-experimental"><a href="/edge/litert/models/authoring" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/authoring" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/authoring" ><span class="devsite-nav-text" tooltip>Authoring tool</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Model compatibility</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/edge/litert/models/ops_compatibility" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/ops_compatibility" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/ops_compatibility" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/models/ops_select" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/ops_select" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/ops_select" ><span class="devsite-nav-text" tooltip>Select operators</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/models/op_select_allowlist" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/op_select_allowlist" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/op_select_allowlist" ><span class="devsite-nav-text" tooltip>Select operators Allowlist</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Advanced</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/edge/litert/models/ops_custom" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/ops_custom" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/ops_custom" ><span class="devsite-nav-text" tooltip>Custom operators</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/models/operation_fusion" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/operation_fusion" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/operation_fusion" ><span class="devsite-nav-text" tooltip>Fused operators</span></a></li><li class="devsite-nav-item devsite-nav-experimental"><a href="/edge/litert/models/ops_version" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/ops_version" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/ops_version" ><span class="devsite-nav-text" tooltip>Operator versions</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span></a></li><li class="devsite-nav-item"><a href="/edge/litert/models/rnn" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/rnn" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/rnn" ><span class="devsite-nav-text" tooltip>RNN models</span></a></li></ul></div></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Optimize models</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/edge/litert/models/model_optimization" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/model_optimization" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/model_optimization" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/models/post_training_quantization" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/post_training_quantization" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/post_training_quantization" ><span class="devsite-nav-text" tooltip>Post-training quantization</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/models/post_training_quant" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/post_training_quant" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/post_training_quant" ><span class="devsite-nav-text" tooltip>Post-training dynamic range quantization</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/models/post_training_integer_quant" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/post_training_integer_quant" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/post_training_integer_quant" ><span class="devsite-nav-text" tooltip>Post-training integer quantization</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/models/post_training_float16_quant" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/post_training_float16_quant" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/post_training_float16_quant" ><span class="devsite-nav-text" tooltip>Post-training float16 quantization</span></a></li><li class="devsite-nav-item devsite-nav-experimental"><a href="/edge/litert/models/post_training_integer_quant_16x8" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/post_training_integer_quant_16x8" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/post_training_integer_quant_16x8" ><span class="devsite-nav-text" tooltip>Post-training integer quantization with int16 activations</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span></a></li><li class="devsite-nav-item"><a href="/edge/litert/models/quantization_spec" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/quantization_spec" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/quantization_spec" ><span class="devsite-nav-text" tooltip>Quantization specification</span></a></li><li class="devsite-nav-item devsite-nav-nightly"><a href="/edge/litert/models/quantization_debugger" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/quantization_debugger" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/quantization_debugger" ><span class="devsite-nav-text" tooltip>Inspecting quantization errors</span><span class="devsite-nav-icon material-icons" data-icon="nightly" data-title="Nightly build only" aria-hidden="true"></span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Add model metadata</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/edge/litert/models/metadata" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/metadata" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/metadata" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/models/metadata_writer_tutorial" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/metadata_writer_tutorial" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/metadata_writer_tutorial" ><span class="devsite-nav-text" tooltip>Metadata Writer API</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Design and build models</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/edge/litert/models/build" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/build" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/build" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/models/best_practices" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/best_practices" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/best_practices" ><span class="devsite-nav-text" tooltip>Performance best practices</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/models/measurement" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/measurement" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/measurement" ><span class="devsite-nav-text" tooltip>Performance measurement</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/models/ondevice_training" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/ondevice_training" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/ondevice_training" ><span class="devsite-nav-text" tooltip>On-device training</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Convert PyTorch models</span> </div></li> <li class="devsite-nav-item"><a href="/edge/litert/models/convert_pytorch" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/convert_pytorch" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/convert_pytorch" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/edge/litert/models/pytorch_to_tflite" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/pytorch_to_tflite" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/pytorch_to_tflite" ><span class="devsite-nav-text" tooltip>PyTorch to LiteRT quickstart</span></a></li> <li class="devsite-nav-item"><a href="/edge/litert/models/edge_generative" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/edge_generative" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/edge_generative" ><span class="devsite-nav-text" tooltip>Convert generative PyTorch models</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Convert JAX models</span> </div></li> <li class="devsite-nav-item devsite-nav-nightly"><a href="/edge/litert/models/convert_jax" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/convert_jax" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/convert_jax" ><span class="devsite-nav-text" tooltip>Overview</span><span class="devsite-nav-icon material-icons" data-icon="nightly" data-title="Nightly build only" aria-hidden="true"></span></a></li> <li class="devsite-nav-item devsite-nav-nightly"><a href="/edge/litert/models/jax_to_tflite" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/models/jax_to_tflite" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/models/jax_to_tflite" ><span class="devsite-nav-text" tooltip>JAX to LiteRT quickstart</span><span class="devsite-nav-icon material-icons" data-icon="nightly" data-title="Nightly build only" aria-hidden="true"></span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Hardware acceleration</span> </div></li> <li class="devsite-nav-item"><a href="/edge/litert/performance/delegates" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/performance/delegates" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/performance/delegates" ><span class="devsite-nav-text" tooltip>Delegates</span></a></li> <li class="devsite-nav-item"><a href="/edge/litert/performance/gpu" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/performance/gpu" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/performance/gpu" ><span class="devsite-nav-text" tooltip>GPU delegates</span></a></li> <li class="devsite-nav-item devsite-nav-experimental"><a href="/edge/litert/performance/implementing_delegate" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/performance/implementing_delegate" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/performance/implementing_delegate" ><span class="devsite-nav-text" tooltip>Implementing a delegate</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Run on Android</span> </div></li> <li class="devsite-nav-item"><a href="/edge/litert/android" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/android" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/android" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Google Play services runtime</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/edge/litert/android/play_services" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/android/play_services" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/android/play_services" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/android/java" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/android/java" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/android/java" ><span class="devsite-nav-text" tooltip>Java API</span></a></li><li class="devsite-nav-item devsite-nav-experimental"><a href="/edge/litert/android/native" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/android/native" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/android/native" ><span class="devsite-nav-text" tooltip>C API</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span></a></li></ul></div></li> <li class="devsite-nav-item"><a href="/edge/litert/android/development" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/android/development" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/android/development" ><span class="devsite-nav-text" tooltip>Development tools</span></a></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Hardware acceleration</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item devsite-nav-experimental"><a href="/edge/litert/android/acceleration_service" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/android/acceleration_service" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/android/acceleration_service" ><span class="devsite-nav-text" tooltip>Acceleration service</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span></a></li><li class="devsite-nav-item"><a href="/edge/litert/android/gpu" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/android/gpu" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/android/gpu" ><span class="devsite-nav-text" tooltip>GPU with Interpreter API</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/android/gpu_native" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/android/gpu_native" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/android/gpu_native" ><span class="devsite-nav-text" tooltip>GPU with C/C++ API</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/android/npu" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/android/npu" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/android/npu" ><span class="devsite-nav-text" tooltip>NPU delegates</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Models with metadata</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/edge/litert/android/metadata/overview" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/android/metadata/overview" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/android/metadata/overview" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/android/metadata/codegen" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/android/metadata/codegen" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/android/metadata/codegen" ><span class="devsite-nav-text" tooltip>Generate model interfaces</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/android/metadata/lite_support" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/android/metadata/lite_support" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/android/metadata/lite_support" ><span class="devsite-nav-text" tooltip>Customize data input and output</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Run on iOS</span> </div></li> <li class="devsite-nav-item"><a href="/edge/litert/ios/quickstart" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/ios/quickstart" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/ios/quickstart" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/edge/litert/ios/coreml" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/ios/coreml" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/ios/coreml" ><span class="devsite-nav-text" tooltip>Core ML delegate</span></a></li> <li class="devsite-nav-item"><a href="/edge/litert/ios/gpu" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/ios/gpu" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/ios/gpu" ><span class="devsite-nav-text" tooltip>GPU delegate</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Run on Micro</span> </div></li> <li class="devsite-nav-item"><a href="/edge/litert/microcontrollers/overview" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/microcontrollers/overview" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/microcontrollers/overview" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/edge/litert/microcontrollers/get_started" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/microcontrollers/get_started" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/microcontrollers/get_started" ><span class="devsite-nav-text" tooltip>Get started</span></a></li> <li class="devsite-nav-item"><a href="/edge/litert/microcontrollers/python" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/microcontrollers/python" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/microcontrollers/python" ><span class="devsite-nav-text" tooltip>Linux-based devices with Python</span></a></li> <li class="devsite-nav-item"><a href="/edge/litert/microcontrollers/library" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/microcontrollers/library" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/microcontrollers/library" ><span class="devsite-nav-text" tooltip>Understand the C++ library</span></a></li> <li class="devsite-nav-item"><a href="/edge/litert/microcontrollers/build_convert" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/microcontrollers/build_convert" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/microcontrollers/build_convert" ><span class="devsite-nav-text" tooltip>Build and convert models</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Libraries and tools</span> </div></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Task Library</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/edge/litert/libraries/task_library/overview" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/task_library/overview" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/task_library/overview" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/task_library/image_classifier" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/task_library/image_classifier" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/task_library/image_classifier" ><span class="devsite-nav-text" tooltip>ImageClassifier</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/task_library/object_detector" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/task_library/object_detector" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/task_library/object_detector" ><span class="devsite-nav-text" tooltip>ObjectDetector</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/task_library/image_segmenter" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/task_library/image_segmenter" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/task_library/image_segmenter" ><span class="devsite-nav-text" tooltip>ImageSegmenter</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/task_library/image_embedder" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/task_library/image_embedder" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/task_library/image_embedder" ><span class="devsite-nav-text" tooltip>ImageEmbedder</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/task_library/image_searcher" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/task_library/image_searcher" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/task_library/image_searcher" ><span class="devsite-nav-text" tooltip>ImageSearcher</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/task_library/nl_classifier" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/task_library/nl_classifier" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/task_library/nl_classifier" ><span class="devsite-nav-text" tooltip>NLClassifier</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/task_library/bert_nl_classifier" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/task_library/bert_nl_classifier" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/task_library/bert_nl_classifier" ><span class="devsite-nav-text" tooltip>BertNLClassifier</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/task_library/bert_question_answerer" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/task_library/bert_question_answerer" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/task_library/bert_question_answerer" ><span class="devsite-nav-text" tooltip>BertQuestionAnswerer</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/task_library/text_embedder" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/task_library/text_embedder" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/task_library/text_embedder" ><span class="devsite-nav-text" tooltip>TextEmbedder</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/task_library/text_searcher" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/task_library/text_searcher" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/task_library/text_searcher" ><span class="devsite-nav-text" tooltip>TextSearcher</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/task_library/audio_classifier" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/task_library/audio_classifier" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/task_library/audio_classifier" ><span class="devsite-nav-text" tooltip>AudioClassifier</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/task_library/customized_task_api" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/task_library/customized_task_api" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/task_library/customized_task_api" ><span class="devsite-nav-text" tooltip>Customized API</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable devsite-nav-experimental"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Model Maker</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/edge/litert/libraries/modify" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/modify" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/modify" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Images & video</span> </div></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/modify/image_classification" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/modify/image_classification" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/modify/image_classification" ><span class="devsite-nav-text" tooltip>Image classification</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/modify/object_detection" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/modify/object_detection" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/modify/object_detection" ><span class="devsite-nav-text" tooltip>Object detection</span></a></li><li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Text</span> </div></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/modify/text_classification" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/modify/text_classification" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/modify/text_classification" ><span class="devsite-nav-text" tooltip>Text classification</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/modify/question_answer" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/modify/question_answer" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/modify/question_answer" ><span class="devsite-nav-text" tooltip>BERT question & answer</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/modify/text_searcher" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/modify/text_searcher" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/modify/text_searcher" ><span class="devsite-nav-text" tooltip>Text search</span></a></li><li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Audio</span> </div></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/modify/audio_classification" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/modify/audio_classification" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/modify/audio_classification" ><span class="devsite-nav-text" tooltip>Audio classification</span></a></li><li class="devsite-nav-item"><a href="/edge/litert/libraries/modify/speech_recognition" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /edge/litert/libraries/modify/speech_recognition" track-type="bookNav" track-name="click" track-metadata-eventdetail="/edge/litert/libraries/modify/speech_recognition" ><span class="devsite-nav-text" tooltip>Speech recognition</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Advanced</span> </div></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Build LiteRT</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/edge/litert/build/android" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" 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href="https://developers.googleblog.com/en/tensorflow-lite-is-now-litert">Learn more</a> </div> </div> </div> <div class="devsite-article-meta nocontent" role="navigation"> <ul class="devsite-breadcrumb-list" aria-label="Breadcrumb"> <li class="devsite-breadcrumb-item "> <a href="https://ai.google.dev/" class="devsite-breadcrumb-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Breadcrumbs" data-value="1" track-type="globalNav" track-name="breadcrumb" track-metadata-position="1" track-metadata-eventdetail="" > Home </a> </li> <li class="devsite-breadcrumb-item "> <div class="devsite-breadcrumb-guillemet material-icons" aria-hidden="true"></div> <a href="https://ai.google.dev/edge" class="devsite-breadcrumb-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Breadcrumbs" data-value="2" track-type="globalNav" track-name="breadcrumb" track-metadata-position="2" track-metadata-eventdetail="Google AI Edge" > Google AI Edge </a> </li> <li 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Send feedback </button> </devsite-feedback> <h1 class="devsite-page-title" tabindex="-1"> Build LiteRT for Android </h1> <div class="devsite-page-title-meta"><devsite-view-release-notes></devsite-view-release-notes></div> <devsite-toc class="devsite-nav" depth="2" devsite-toc-embedded > </devsite-toc> <div class="devsite-article-body clearfix "> <p><devsite-mathjax config="TeX-AMS-MML_SVG"></devsite-mathjax></p> <p>This document describes how to build LiteRT Android library on your own. Normally, you do not need to locally build LiteRT Android library.</p> <h2 id="use_nightly_snapshots" data-text="Use Nightly Snapshots" tabindex="-1">Use Nightly Snapshots</h2> <p>To use nightly snapshots, add the following repo to your root Gradle build config.</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Carbon"><code translate="no" dir="ltr"><span class="devsite-syntax-nx">allprojects</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">{</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">repositories</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">{</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-c1">// should be already there</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">mavenCentral</span><span class="devsite-syntax-p">()</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-c1">// should be already there</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">maven</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">{</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-c1">// add this repo to use snapshots</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">name</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-err">'</span><span class="devsite-syntax-nx">ossrh</span><span class="devsite-syntax-o">-</span><span class="devsite-syntax-nx">snapshot</span><span class="devsite-syntax-err">'</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">url</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-err">'</span><span class="devsite-syntax-nx">https</span><span class="devsite-syntax-p">:</span><span class="devsite-syntax-c1">//oss.sonatype.org/content/repositories/snapshots'</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">}</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">}</span> <span class="devsite-syntax-p">}</span> </code></pre></devsite-code> <p>add nightly snapshots to dependencies (or edit as needed) to your build.gradle</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Groovy"><code translate="no" dir="ltr"><span class="devsite-syntax-o">...</span> <span class="devsite-syntax-n">dependencies</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-o">{</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-o">...</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-n">implementation</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-s1">'org.tensorflow:tensorflow-lite:0.0.0-nightly-SNAPSHOT'</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-n">implementation</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-s1">'com.google.ai.edge.litert:litert-gpu:0.0.0-nightly-SNAPSHOT'</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-n">implementation</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-s1">'com.google.ai.edge.litert:litert-support:0.0.0-nightly-SNAPSHOT'</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-o">...</span> <span class="devsite-syntax-o">}</span> <span class="devsite-syntax-o">...</span> </code></pre></devsite-code> <h2 id="build_litert_locally" data-text="Build LiteRT locally" tabindex="-1">Build LiteRT locally</h2> <p>In some cases, you might wish to use a local build of LiteRT. For example, you may be building a custom binary that includes <a href="https://ai.google.dev/edge/litert/models/ops_select">operations selected from TensorFlow</a>, or you may wish to make local changes to LiteRT.</p> <h3 id="set_up_build_environment_using_docker" data-text="Set up build environment using Docker" tabindex="-1">Set up build environment using Docker</h3> <ul> <li>Download the Docker file. By downloading the Docker file, you agree that the following terms of service govern your use thereof:</li> </ul> <p><em>By clicking to accept, you hereby agree that all use of the Android Studio and Android Native Development Kit will be governed by the Android Software Development Kit License Agreement available at <a href="https://developer.android.com/studio/terms">https://developer.android.com/studio/terms</a> (such URL may be updated or changed by Google from time to time).</em></p>  You must acknowledge the terms of service to download the file. <button class="button-blue devsite-acknowledgement-link" data-globally-unique-wall-id="tflite-android-tos">Acknowledge</button> </p> <ul> <li>You can optionally change the Android SDK or NDK version. Put the downloaded Docker file in an empty folder and build your docker image by running:</li> </ul> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Bash"><code translate="no" dir="ltr">docker<span class="devsite-syntax-w"> </span>build<span class="devsite-syntax-w"> </span>.<span class="devsite-syntax-w"> </span>-t<span class="devsite-syntax-w"> </span>tflite-builder<span class="devsite-syntax-w"> </span>-f<span class="devsite-syntax-w"> </span>tflite-android.Dockerfile </code></pre></devsite-code> <ul> <li>Start the docker container interactively by mounting your current folder to /host_dir inside the container (note that /tensorflow_src is the TensorFlow repository inside the container):</li> </ul> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Bash"><code translate="no" dir="ltr">docker<span class="devsite-syntax-w"> </span>run<span class="devsite-syntax-w"> </span>-it<span class="devsite-syntax-w"> </span>-v<span class="devsite-syntax-w"> </span><span class="devsite-syntax-nv">$PWD</span>:/host_dir<span class="devsite-syntax-w"> </span>tflite-builder<span class="devsite-syntax-w"> </span>bash </code></pre></devsite-code> <p>If you use PowerShell on Windows, replace "$PWD" with "pwd".</p> <p>If you would like to use a TensorFlow repository on the host, mount that host directory instead (-v hostDir:/host_dir).</p> <ul> <li>Once you are inside the container, you can run the following to download additional Android tools and libraries (note that you may need to accept the license):</li> </ul> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Bash"><code translate="no" dir="ltr">sdkmanager<span class="devsite-syntax-w"> </span><span class="devsite-syntax-se">\</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-s2">"build-tools;</span><span class="devsite-syntax-si">${</span><span class="devsite-syntax-nv">ANDROID_BUILD_TOOLS_VERSION</span><span class="devsite-syntax-si">}</span><span class="devsite-syntax-s2">"</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-se">\</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-s2">"platform-tools"</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-se">\</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-s2">"platforms;android-</span><span class="devsite-syntax-si">${</span><span class="devsite-syntax-nv">ANDROID_API_LEVEL</span><span class="devsite-syntax-si">}</span><span class="devsite-syntax-s2">"</span> </code></pre></devsite-code> <p>Now you should proceed to the <a href="#configure_workspace_and_bazelrc">Configure WORKSPACE and .bazelrc</a> section to configure the build settings.</p> <p>After you finish building the libraries, you can copy them to /host_dir inside the container so that you can access them on the host.</p> <h3 id="set_up_build_environment_without_docker" data-text="Set up build environment without Docker" tabindex="-1">Set up build environment without Docker</h3> <h4 id="install_bazel_and_android_prerequisites" data-text="Install Bazel and Android Prerequisites" tabindex="-1">Install Bazel and Android Prerequisites</h4> <p>Bazel is the primary build system for TensorFlow. To build with it, you must have it and the Android NDK and SDK installed on your system.</p> <ol> <li>Install the latest version of the <a href="https://bazel.build/versions/master/docs/install.html">Bazel build system</a>.</li> <li>The Android NDK is required to build the native (C/C++) LiteRT code. The current recommended version is 25b, which may be found <a href="https://developer.android.com/ndk/downloads/older_releases.html#ndk-25b-downloads">here</a>.</li> <li>The Android SDK and build tools may be obtained <a href="https://developer.android.com/tools/revisions/build-tools.html">here</a>, or alternatively as part of <a href="https://developer.android.com/studio/index.html">Android Studio</a>. Build tools API >= 23 is the recommended version for building LiteRT.</li> </ol> <h3 id="configure_workspace_and_bazelrc" data-text="Configure WORKSPACE and .bazelrc" tabindex="-1">Configure WORKSPACE and .bazelrc</h3> <p>This is a one-time configuration step that is required to build the LiteRT libraries. Run the <code translate="no" dir="ltr">./configure</code> script in the root TensorFlow checkout directory, and answer "Yes" when the script asks to interactively configure the <code translate="no" dir="ltr">./WORKSPACE</code> for Android builds. The script will attempt to configure settings using the following environment variables:</p> <ul> <li><code translate="no" dir="ltr">ANDROID_SDK_HOME</code></li> <li><code translate="no" dir="ltr">ANDROID_SDK_API_LEVEL</code></li> <li><code translate="no" dir="ltr">ANDROID_NDK_HOME</code></li> <li><code translate="no" dir="ltr">ANDROID_NDK_API_LEVEL</code></li> </ul> <p>If these variables aren't set, they must be provided interactively in the script prompt. Successful configuration should yield entries similar to the following in the <code translate="no" dir="ltr">.tf_configure.bazelrc</code> file in the root folder:</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Bash"><code translate="no" dir="ltr">build<span class="devsite-syntax-w"> </span>--action_env<span class="devsite-syntax-w"> </span><span class="devsite-syntax-nv">ANDROID_NDK_HOME</span><span class="devsite-syntax-o">=</span><span class="devsite-syntax-s2">"/usr/local/android/android-ndk-r25b"</span> build<span class="devsite-syntax-w"> </span>--action_env<span class="devsite-syntax-w"> </span><span class="devsite-syntax-nv">ANDROID_NDK_API_LEVEL</span><span class="devsite-syntax-o">=</span><span class="devsite-syntax-s2">"21"</span> build<span class="devsite-syntax-w"> </span>--action_env<span class="devsite-syntax-w"> </span><span class="devsite-syntax-nv">ANDROID_BUILD_TOOLS_VERSION</span><span class="devsite-syntax-o">=</span><span class="devsite-syntax-s2">"30.0.3"</span> build<span class="devsite-syntax-w"> </span>--action_env<span class="devsite-syntax-w"> </span><span class="devsite-syntax-nv">ANDROID_SDK_API_LEVEL</span><span class="devsite-syntax-o">=</span><span class="devsite-syntax-s2">"30"</span> build<span class="devsite-syntax-w"> </span>--action_env<span class="devsite-syntax-w"> </span><span class="devsite-syntax-nv">ANDROID_SDK_HOME</span><span class="devsite-syntax-o">=</span><span class="devsite-syntax-s2">"/usr/local/android/android-sdk-linux"</span> </code></pre></devsite-code> <h3 id="build_and_install" data-text="Build and install" tabindex="-1">Build and install</h3> <p>Once Bazel is properly configured, you can build the LiteRT AAR from the root checkout directory as follows:</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Bash"><code translate="no" dir="ltr">bazel<span class="devsite-syntax-w"> </span>build<span class="devsite-syntax-w"> </span>-c<span class="devsite-syntax-w"> </span>opt<span class="devsite-syntax-w"> </span>--cxxopt<span class="devsite-syntax-o">=</span>--std<span class="devsite-syntax-o">=</span>c++17<span class="devsite-syntax-w"> </span>--config<span class="devsite-syntax-o">=</span>android_arm64<span class="devsite-syntax-w"> </span><span class="devsite-syntax-se">\</span> <span class="devsite-syntax-w"> </span>--fat_apk_cpu<span class="devsite-syntax-o">=</span>x86,x86_64,arm64-v8a,armeabi-v7a<span class="devsite-syntax-w"> </span><span class="devsite-syntax-se">\</span> <span class="devsite-syntax-w"> </span>--define<span class="devsite-syntax-o">=</span><span class="devsite-syntax-nv">android_dexmerger_tool</span><span class="devsite-syntax-o">=</span>d8_dexmerger<span class="devsite-syntax-w"> </span><span class="devsite-syntax-se">\</span> <span class="devsite-syntax-w"> </span>--define<span class="devsite-syntax-o">=</span><span class="devsite-syntax-nv">android_incremental_dexing_tool</span><span class="devsite-syntax-o">=</span>d8_dexbuilder<span class="devsite-syntax-w"> </span><span class="devsite-syntax-se">\</span> <span class="devsite-syntax-w"> </span>//tensorflow/lite/java:tensorflow-lite </code></pre></devsite-code> <p>This will generate an AAR file in <code translate="no" dir="ltr">bazel-bin/tensorflow/lite/java/</code>. Note that this builds a "fat" AAR with several different architectures; if you don't need all of them, use the subset appropriate for your deployment environment.</p> <p>You can build smaller AAR files targeting only a set of models as follows:</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Bash"><code translate="no" dir="ltr">bash<span class="devsite-syntax-w"> </span>tensorflow/lite/tools/build_aar.sh<span class="devsite-syntax-w"> </span><span class="devsite-syntax-se">\</span> <span class="devsite-syntax-w"> </span>--input_models<span class="devsite-syntax-o">=</span>model1,model2<span class="devsite-syntax-w"> </span><span class="devsite-syntax-se">\</span> <span class="devsite-syntax-w"> </span>--target_archs<span class="devsite-syntax-o">=</span>x86,x86_64,arm64-v8a,armeabi-v7a </code></pre></devsite-code> <p>Above script will generate the <code translate="no" dir="ltr">tensorflow-lite.aar</code> file and optionally the <code translate="no" dir="ltr">tensorflow-lite-select-tf-ops.aar</code> file if one of the models is using Tensorflow ops. For more details, please see the <a href="https://ai.google.dev/edge/litert/build/reduce_binary_size">Reduce LiteRT binary size</a> section.</p> <h4 id="add_aar_directly_to_project" data-text="Add AAR directly to project" tabindex="-1">Add AAR directly to project</h4> <p>Move the <code translate="no" dir="ltr">tensorflow-lite.aar</code> file into a directory called <code translate="no" dir="ltr">libs</code> in your project. Modify your app's <code translate="no" dir="ltr">build.gradle</code> file to reference the new directory and replace the existing LiteRT dependency with the new local library, e.g.:</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Carbon"><code translate="no" dir="ltr"><span class="devsite-syntax-nx">allprojects</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">{</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">repositories</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">{</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">mavenCentral</span><span class="devsite-syntax-p">()</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">maven</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">{</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-c1">// Only for snapshot artifacts</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">name</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-err">'</span><span class="devsite-syntax-nx">ossrh</span><span class="devsite-syntax-o">-</span><span class="devsite-syntax-nx">snapshot</span><span class="devsite-syntax-err">'</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">url</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-err">'</span><span class="devsite-syntax-nx">https</span><span class="devsite-syntax-p">:</span><span class="devsite-syntax-c1">//oss.sonatype.org/content/repositories/snapshots'</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">}</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">flatDir</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">{</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">dirs</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-err">'</span><span class="devsite-syntax-nx">libs</span><span class="devsite-syntax-err">'</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">}</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">}</span> <span class="devsite-syntax-p">}</span> <span class="devsite-syntax-nx">dependencies</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">{</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">compile</span><span class="devsite-syntax-p">(</span><span class="devsite-syntax-nx">name</span><span class="devsite-syntax-p">:</span><span class="devsite-syntax-err">'</span><span class="devsite-syntax-nx">tensorflow</span><span class="devsite-syntax-o">-</span><span class="devsite-syntax-nx">lite</span><span class="devsite-syntax-err">'</span><span class="devsite-syntax-p">,</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">ext</span><span class="devsite-syntax-p">:</span><span class="devsite-syntax-err">'</span><span class="devsite-syntax-nx">aar</span><span class="devsite-syntax-err">'</span><span class="devsite-syntax-p">)</span> <span class="devsite-syntax-p">}</span> </code></pre></devsite-code> <h4 id="install_aar_to_local_maven_repository" data-text="Install AAR to local Maven repository" tabindex="-1">Install AAR to local Maven repository</h4> <p>Execute the following command from your root checkout directory:</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Bash"><code translate="no" dir="ltr">mvn<span class="devsite-syntax-w"> </span>install:install-file<span class="devsite-syntax-w"> </span><span class="devsite-syntax-se">\</span> <span class="devsite-syntax-w"> </span>-Dfile<span class="devsite-syntax-o">=</span>bazel-bin/tensorflow/lite/java/tensorflow-lite.aar<span class="devsite-syntax-w"> </span><span class="devsite-syntax-se">\</span> <span class="devsite-syntax-w"> </span>-DgroupId<span class="devsite-syntax-o">=</span>org.tensorflow<span class="devsite-syntax-w"> </span><span class="devsite-syntax-se">\</span> <span class="devsite-syntax-w"> </span>-DartifactId<span class="devsite-syntax-o">=</span>tensorflow-lite<span class="devsite-syntax-w"> </span>-Dversion<span class="devsite-syntax-o">=</span><span class="devsite-syntax-m">0</span>.1.100<span class="devsite-syntax-w"> </span>-Dpackaging<span class="devsite-syntax-o">=</span>aar </code></pre></devsite-code> <p>In your app's <code translate="no" dir="ltr">build.gradle</code>, ensure you have the <code translate="no" dir="ltr">mavenLocal()</code> dependency and replace the standard LiteRT dependency with the one that has support for select TensorFlow ops:</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Lasso"><code translate="no" dir="ltr"><span class="devsite-syntax-nx">allprojects</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">{</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">repositories</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">{</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">mavenCentral</span><span class="devsite-syntax-p">()</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">maven</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">{</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-c1">// Only for snapshot artifacts</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">name</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-s1">'ossrh-snapshot'</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">url</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-s1">'https://oss.sonatype.org/content/repositories/snapshots'</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">}</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">mavenLocal</span><span class="devsite-syntax-p">()</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">}</span> <span class="devsite-syntax-p">}</span> <span class="devsite-syntax-nx">dependencies</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">{</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nx">implementation</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-s1">'org.tensorflow:tensorflow-lite:0.1.100'</span> <span class="devsite-syntax-p">}</span> </code></pre></devsite-code> <p>Note that the <code translate="no" dir="ltr">0.1.100</code> version here is purely for the sake of testing/development. With the local AAR installed, you can use the standard <a href="https://ai.google.dev/edge/litert/inference">LiteRT Java inference APIs</a> in your app code.</p> </div> <devsite-thumb-rating position="footer"> </devsite-thumb-rating> <devsite-feedback position="footer" project-name="Google AI Edge" product-id="5336252" bucket="documentation" context="" version="t-devsite-webserver-20241114-r00-rc02.464921008191574316" data-label="Send Feedback Button" track-type="feedback" track-name="sendFeedbackLink" track-metadata-position="footer" class="nocontent" project-icon="https://www.gstatic.com/devrel-devsite/prod/v870e399c64f7c43c99a3043db4b3a74327bb93d0914e84a0c3dba90bbfd67625/googledevai/images/touchicon-180-new.png" > <button> Send feedback </button> </devsite-feedback> <div class="devsite-floating-action-buttons"> </div> </article> <devsite-content-footer class="nocontent"> <p>Except as otherwise noted, the content of this page is licensed under the <a href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 License</a>, and code samples are licensed under the <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache 2.0 License</a>. 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