Segui le istruzioni riportate di seguito per creare app di esempio per Android con il framework MediaPipe.
Per scoprire di più su queste app di esempio, inizia da Hello World! su
Android.
Creazione di app di esempio per Android con Bazel
Prerequisito
Installa MediaPipe Framework seguendo queste istruzioni.
Configura Java Runtime.
Configura la release 35.0.0 o successive dell'SDK per Android.
Configura Android NDK versione 28 o successive.
MediaPipe consiglia di configurare Android SDK e NDK tramite Android Studio (vedi
di seguito la configurazione di Android Studio). Tuttavia, se preferisci utilizzare MediaPipe senza
Android Studio, esegui
setup_android_sdk_and_ndk.sh
per scaricare e configurare Android SDK e NDK prima di creare app di esempio per Android.
Se Android SDK e NDK sono già installati (ad es. da Android Studio), imposta
$ANDROID_HOME e $ANDROID_NDK_HOME in modo che puntino all'SDK e all'NDK installati.
Per utilizzare Framework su versioni precedenti di Android, MediaPipe deve passare
a un livello API Android inferiore. Puoi farlo specificando api_level =
$YOUR_INTENDED_API_LEVEL in android_ndk_repository() e/o
android_sdk_repository() nel file
WORKSPACE.
Per creare un'app di esempio per Android, esegui la build in base al target di build android_binary corrispondente. Ad esempio, per MediaPipe Hands la destinazione
è handtrackinggpu nel
file
BUILD:
[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Mancano le informazioni di cui ho bisogno","missingTheInformationINeed","thumb-down"],["Troppo complicato/troppi passaggi","tooComplicatedTooManySteps","thumb-down"],["Obsoleti","outOfDate","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Problema relativo a esempi/codice","samplesCodeIssue","thumb-down"],["Altra","otherDown","thumb-down"]],["Ultimo aggiornamento 2025-07-24 UTC."],[],[],null,["# MediaPipe Framework on Android\n\nPlease follow instructions below to build Android example apps with MediaPipe Framework.\nTo learn more about these example apps, start from [Hello World! on\nAndroid](./hello_world_android.md).\n\nBuilding Android example apps with Bazel\n----------------------------------------\n\n### Prerequisite\n\n- Install MediaPipe Framework following these [instructions](./install.md).\n- Setup Java Runtime.\n- Setup Android SDK release 35.0.0 or later.\n- Setup Android NDK version 28 or later.\n\nMediaPipe recommends setting up Android SDK and NDK via Android Studio (and see\nbelow for Android Studio setup). However, if you prefer using MediaPipe without\nAndroid Studio, please run\n[`setup_android_sdk_and_ndk.sh`](https://github.com/google/mediapipe/blob/master/setup_android_sdk_and_ndk.sh)\nto download and setup Android SDK and NDK before building any Android example\napps.\n\nIf Android SDK and NDK are already installed (e.g., by Android Studio), set\n`$ANDROID_HOME` and `$ANDROID_NDK_HOME` to point to the installed SDK and NDK. \n\n export ANDROID_HOME=\u003cpath to the Android SDK\u003e\n export ANDROID_NDK_HOME=\u003cpath to the Android NDK\u003e\n\nand add `android_ndk_repository()`, `android_sdk_repository()` and `bind()`\nrules into the\n[`WORKSPACE`](https://github.com/google/mediapipe/blob/master/WORKSPACE) file as\nthe following: \n\n $ echo \"android_sdk_repository(name = \\\"androidsdk\\\")\" \u003e\u003e WORKSPACE\n $ echo \"android_ndk_repository(name = \\\"androidndk\\\", api_level=26)\" \u003e\u003e WORKSPACE\n $ echo \"bind(name = \\\"android/crosstool\\\", actual = \\\"@androidndk//:toolchain\\\")\" \u003e\u003e WORKSPACE\n\nIn order to use Framework on earlier Android versions, MediaPipe needs to switch\nto a lower Android API level. You can achieve this by specifying `api_level =\n$YOUR_INTENDED_API_LEVEL` in android_ndk_repository() and/or\nandroid_sdk_repository() in the\n[`WORKSPACE`](https://github.com/google/mediapipe/blob/master/WORKSPACE) file.\n| **Tip:** You can run this [script](https://github.com/google/mediapipe/blob/master/build_android_examples.sh) to build (and install) all MediaPipe Android example apps.\n\n1. To build an Android example app, build against the corresponding\n `android_binary` build target. For instance, for MediaPipe Hands the target\n is `handtrackinggpu` in the\n [BUILD](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/handtrackinggpu/BUILD)\n file:\n\n **Note:** To reduce the binary size, consider appending `--linkopt=\"-s\"` to the command below to strip symbols. \n\n bazel build -c opt --config=android_arm64 mediapipe/examples/android/src/java/com/google/mediapipe/apps/handtrackinggpu:handtrackinggpu\n\n2. Install it on a device with:\n\n adb install bazel-bin/mediapipe/examples/android/src/java/com/google/mediapipe/apps/handtrackinggpu/handtrackinggpu.apk"]]
