Jalur penginstalan model ML Kit di Android
Tetap teratur dengan koleksi
Simpan dan kategorikan konten berdasarkan preferensi Anda.
Semua fitur ML Kit menggunakan model machine learning yang dilatih Google (dikenal sebagai model dasar) secara default. Panduan ini hanya berlaku untuk model dasar. Lihat di sini
untuk mendapatkan panduan tentang model kustom.
Model di API ML Kit dapat diinstal dengan salah satu dari tiga cara berikut:
- Tidak tergabung: Model didownload dan dikelola melalui Layanan Google Play.
- Digabungkan: Model ditautkan secara statis ke aplikasi Anda pada waktu build.
- Didownload secara dinamis: Model didownload sesuai permintaan.
Jalur penginstalan yang didukung untuk setiap API
Tabel di bawah menunjukkan jalur penginstalan model yang didukung oleh setiap fitur ML Kit:
Panduan khusus API menunjukkan opsi penginstalan yang tersedia untuk API tertentu.
Perbedaan utama antara opsi penginstalan
Cara memilih antara paket dan tidak dipaketkan
Jika API mendukung opsi penginstalan paket dan tanpa paket:
Cara mendownload model
Saat menggunakan opsi model yang tidak dipaketkan, Anda dapat menentukan cara model didownload ke perangkat:
Anda dapat mengaktifkan download model saat penginstalan dengan menambahkan pernyataan ke
file AndroidManifest.xml aplikasi Anda. Misalnya, cuplikan kode di bawah menunjukkan cara mengonfigurasi aplikasi Anda untuk mendownload model Pemindaian Kode Batang secara otomatis setelah aplikasi Anda diinstal dari Play Store:
<application ...>
...
<meta-data
android:name="com.google.mlkit.vision.DEPENDENCIES"
android:value="barcode" >
<!-- To use multiple models: android:value="barcode,model2,model3" -->
</application>
Anda dapat meminta download eksplisit melalui Google Play Services
ModuleInstallClient API.
Jika Anda tidak mengaktifkan download model waktu-instal atau meminta download eksplisit, model akan didownload saat pertama kali Anda menjalankan fitur.
Hingga download selesai, permintaan inferensi akan gagal.
Cara mengupdate model
Untuk mengupdate model saat menggunakan model paket atau opsi model yang didownload secara dinamis:
Perbarui file gradle aplikasi Anda untuk menggunakan library klien fitur ML Kit terbaru.
dependencies {
implementation 'com.google.mlkit:barcode-scanning: 17.3.0' // The latest version number of the API
}
Bangun ulang aplikasi Anda.
Alasan beberapa API menawarkan model yang didownload secara dinamis
Beberapa API ML Kit memiliki terlalu banyak opsi model untuk dibundel. Misalnya, Pengenalan tinta digital mendukung lebih dari 300 bahasa, dan tidak selalu perlu memasukkan setiap bahasa ke dalam fitur selama penginstalan.
Untuk tujuan tersebut, kami menyediakan opsi penginstalan ketiga, yang modelnya didownload on demand setelah penginstalan. Saat ini, hanya Pengenalan tinta digital, Terjemahan, dan Ekstraksi entitas yang memiliki opsi ini.
Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0, sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0. Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers. Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
Terakhir diperbarui pada 2025-09-04 UTC.
[null,null,["Terakhir diperbarui pada 2025-09-04 UTC."],[[["\u003cp\u003eML Kit features utilize Google-trained machine learning models, offering three installation options: unbundled, bundled, and dynamically downloaded.\u003c/p\u003e\n"],["\u003cp\u003eUnbundled models are downloaded via Google Play Services, while bundled models are included in the app, and dynamically downloaded models are fetched on demand.\u003c/p\u003e\n"],["\u003cp\u003eChoosing between bundled and unbundled models depends on priorities: bundled for immediate functionality, unbundled for smaller app size and automatic updates.\u003c/p\u003e\n"],["\u003cp\u003eModels can be downloaded at install time, explicitly requested, or downloaded on first use, and updates for bundled or dynamically downloaded models require app updates.\u003c/p\u003e\n"],["\u003cp\u003eDynamically downloaded models are offered for APIs with extensive model options, such as Digital Ink Recognition and Translation, to avoid bundling all possibilities.\u003c/p\u003e\n"]]],[],null,["All ML Kit features make use of Google-trained machine learning models (known as\nbase models) by default. This guide is only applicable to base models. [See here\nfor guidance on custom models.](/ml-kit/custom-models)\n\nModels in ML Kit APIs can be installed in one of three ways:\n\n1. **Unbundled:** Models are downloaded and managed via Google Play Services.\n2. **Bundled:** Models are statically linked to your app at build time.\n3. **Dynamically downloaded:** Models are downloaded on demand.\n\nSupported installation paths for each API\n\nThe table below shows which model installation paths are supported by each ML\nKit feature:\n\n|---------------------------------------------------------------------------|---------------|-------------|----------------------------|\n| | **Unbundled** | **Bundled** | **Dynamically downloaded** |\n| [Text recognition v2](/ml-kit/vision/text-recognition/v2/android) | ✅ | ✅ | |\n| [Face detection](/ml-kit/vision/face-detection/android) | ✅ | ✅ | |\n| [Face mesh detection](/ml-kit/vision/face-mesh-detection/android) | | ✅ | |\n| [Pose detection](/ml-kit/vision/pose-detection/android) | | ✅ | |\n| [Selfie segmentation](/ml-kit/vision/selfie-segmentation/android) | | ✅ | |\n| [Barcode scanning](/ml-kit/vision/barcode-scanning/android) | ✅ | ✅ | |\n| [Image labeling](/ml-kit/vision/image-labeling/android) | ✅ | ✅ | |\n| [Object detection and tracking](/ml-kit/vision/object-detection/android) | | ✅ | |\n| [Digital ink recognition](/ml-kit/vision/digital-ink-recognition/android) | | | ✅ |\n| [Document scanner](/ml-kit/vision/doc-scanner) | ✅ | | |\n| [Subject segmentation](/ml-kit/vision/subject-segmentation/android) | ✅ | | |\n| [Google code scanner](/ml-kit/code-scanner) | ✅ | | |\n| [Language identification](/ml-kit/language/identification/android) | ✅ | ✅ | |\n| [Translation](/ml-kit/language/translation/android) | | | ✅ |\n| [Smart Reply](/ml-kit/language/smart-reply/android) | ✅ | ✅ | |\n| [Entity Extraction](/ml-kit/language/entity-extraction/android) | | | ✅ |\n\nAPI-specific guides show which installation options are available for the given\nAPI.\n\nKey differences between installation options\n\n|----------------------------------------------|-------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| | **Unbundled** | **Bundled** | **Dynamically downloaded** |\n| **Where are models stored?** | Resides in Google Play Services and is not counted towards the storage used by this app | Saved in [app-specific storage](https://developer.android.com/training/data-storage/app-specific) after installation | Saved in [app-specific storage](https://developer.android.com/training/data-storage/app-specific) after model download |\n| **How does model size affect app size?** | Does not contribute to app size | Directly contributes to app size | Does not contribute to app size but increase the [app-specific storage](https://developer.android.com/training/data-storage/app-specific) |\n| **When are models updated?** | Automatically updated when a newer version is released | [Need to update the app to update model](#update-model) | [Need to update the app to update model](#update-model) |\n| **When are models downloaded?** | [Models must be downloaded before use](#download-models) | All models and features are included when the app is installed, so are usable immediately | Model downloads, updates, and deletions must be managed manually using the [RemoteModelManager](/android/reference/com/google/mlkit/common/model/RemoteModelManager) API |\n| **When are models removed from the device?** | Google Play Services will only remove the model from storage if all apps that depend on the model are uninstalled | Models are removed from [app-specific storage](https://developer.android.com/training/data-storage/app-specific) when the app is uninstalled | Downloaded models are removed from [app-specific storage](https://developer.android.com/training/data-storage/app-specific) when the app is uninstalled |\n\nHow to choose between bundled and unbundled\n\nIf an API supports both the bundled and unbundled installation options:\n\n- Use the bundled option if you prioritize:\n\n - Complete feature functionality immediately after app installation\n - Feature functionality without network connection after app installation\n- Use the unbundled option if you prioritize:\n\n - Smaller app size\n - Automated model updates by Google Play Services\n\nHow to download models\n\nWhen using the unbundled model option, you can specify how you want models to be\ndownloaded to the device:\n\n- You can enable **install-time model downloads** by adding a declaration to\n your app's `AndroidManifest.xml` file. For example, the code snippet below\n shows how to configure your app to automatically download the Barcode\n Scanning model after your app is installed from the Play Store:\n\n \u003capplication ...\u003e\n ...\n \u003cmeta-data\n android:name=\"com.google.mlkit.vision.DEPENDENCIES\"\n android:value=\"barcode\" \u003e\n \u003c!-- To use multiple models: android:value=\"barcode,model2,model3\" --\u003e\n \u003c/application\u003e\n\n- You can **request explicit download** through Google Play Services\n [ModuleInstallClient API](/android/guides/module-install-apis).\n\n- If you don't enable install-time model downloads or request explicit\n download, the model will be downloaded the first time you run the feature.\n Until the download is completed, inference requests will fail.\n\nHow to update models\n\nTo update your models when using the bundled model or the dynamically downloaded\nmodels option:\n\n1. Update your app's gradle file to use the latest ML Kit feature client\n library.\n\n dependencies {\n implementation 'com.google.mlkit:barcode-scanning: 17.3.0' // The latest version number of the API\n }\n\n2. Rebuild your app.\n\nWhy some APIs offer dynamically downloaded models\n\nSome ML Kit API have too many model options to bundle. For example, [Digital ink\nrecognition](/ml-kit/vision/digital-ink-recognition) supports [300+\nlanguages](/ml-kit/vision/digital-ink-recognition/base-models), and it's not\nalways necessary to put every language inside the feature during installation.\nFor that purpose, we provide the third installation option, in which models are\ndownloaded on demand after installation. Currently, only [Digital ink\nrecognition](/ml-kit/vision/digital-ink-recognition),\n[Translation](/ml-kit/language/translation) and [Entity\nextraction](/ml-kit/language/entity-extraction) have this option."]]
