// Check whether your app is running on a device that has a front-facing camera.if(applicationContext.packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA_FRONT)){// Continue with the part of your app's workflow that requires a// front-facing camera.}else{// Gracefully degrade your app experience.}
Java
// Check whether your app is running on a device that has a front-facing camera.if(getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FRONT)){// Continue with the part of your app's workflow that requires a// front-facing camera.}else{// Gracefully degrade your app experience.}
[null,null,["อัปเดตล่าสุด 2025-07-27 UTC"],[],[],null,["# Declare app permissions\n\nAs mentioned in the [workflow for using\npermissions](/training/basics/permissions#workflow), if your app requests app\npermissions, you must declare these permissions in your app's manifest file.\nThese declarations help app stores and users understand the set of permissions\nthat your app might request.\n\nThe process to request a permission depends on the type of\npermission:\n\n- If the permission is an [install-time\n permission](/guide/topics/permissions/overview#install-time), such as a normal permission or a signature permission, the permission is granted automatically at install time.\n- If the permission is a [runtime\n permission](/guide/topics/permissions/overview#runtime) or [special\n permission](/guide/topics/permissions/overview#special), and if your app is installed on a device that runs Android 6.0 (API level 23) or higher, you must request the [runtime permission](/training/permissions/requesting) or [special\n permission](/training/permissions/requesting-special) yourself.\n\n| **Caution:** Carefully consider which permissions to declare in your app's manifest. Add only the permissions that your app needs. For each permission that your app requests, make sure that it offers clear benefits to users and that the request is done in a way that's obvious to them.\n\nAdd declaration to app manifest\n-------------------------------\n\nTo declare a permission that your app might request, include the appropriate\n[`\u003cuses-permission\u003e`](/guide/topics/manifest/uses-permission-element) element in\nyour app's manifest file. For example, an app that needs to access the camera\nhas this line in `AndroidManifest.xml`: \n\n```xml\n\u003cmanifest ...\u003e\n \u003cuses-permission android:name=\"android.permission.CAMERA\"/\u003e\n \u003capplication ...\u003e\n ...\n \u003c/application\u003e\n\u003c/manifest\u003e\n```\n\nDeclare hardware as optional\n----------------------------\n\nSome permissions, such as\n[`CAMERA`](/reference/android/Manifest.permission#CAMERA), let your app\naccess pieces of hardware that only some Android devices have. If your app\ndeclares one of these [hardware-associated\npermissions](/guide/topics/manifest/uses-feature-element#permissions-features),\nconsider whether your app can still run on a device that doesn't have that\nhardware. In most cases, hardware is optional, so it's better to declare the\nhardware as optional by setting `android:required` to `false` in your\n[`\u003cuses-feature\u003e`](/guide/topics/manifest/uses-feature-element) declaration, as\nshown in the following code snippet from an `AndroidManifest.xml` file: \n\n```xml\n\u003cmanifest ...\u003e\n \u003capplication\u003e\n ...\n \u003c/application\u003e\n \u003cuses-feature android:name=\"android.hardware.camera\"\n android:required=\"false\" /\u003e\n\u003cmanifest\u003e\n```\n| **Caution:** If you don't set `android:required` to `false` in your `\u003cuses-feature\u003e` declaration, Android assumes that the hardware is required for your app to run. The system then [prevents some devices from being able to install your\n| app](/guide/topics/manifest/uses-feature-element#market-feature-filtering).\n\n### Determine hardware availability\n\nIf you declare hardware as optional, it's possible for your app to run on a\ndevice that doesn't have that hardware. To check whether a device has a specific\npiece of hardware, use the\n[`hasSystemFeature()`](/reference/android/content/pm/PackageManager#hasSystemFeature(java.lang.String))\nmethod, as shown in the following code snippet. If the hardware isn't available,\ngracefully disable that feature in your app. \n\n### Kotlin\n\n```kotlin\n// Check whether your app is running on a device that has a front-facing camera.\nif (applicationContext.packageManager.hasSystemFeature(\n PackageManager.FEATURE_CAMERA_FRONT)) {\n // Continue with the part of your app's workflow that requires a\n // front-facing camera.\n} else {\n // Gracefully degrade your app experience.\n}\n```\n\n### Java\n\n```java\n// Check whether your app is running on a device that has a front-facing camera.\nif (getApplicationContext().getPackageManager().hasSystemFeature(\n PackageManager.FEATURE_CAMERA_FRONT)) {\n // Continue with the part of your app's workflow that requires a\n // front-facing camera.\n} else {\n // Gracefully degrade your app experience.\n}\n```\n\nDeclare permissions by API level\n--------------------------------\n\nTo declare a permission only on devices that support runtime permissions---that\nis, devices that run Android 6.0 (API level 23) or higher---include the\n[`\u003cuses-permission-sdk-23\u003e`](/guide/topics/manifest/uses-permission-sdk-23-element)\nelement instead of the\n[`\u003cuses-permission\u003e`](/guide/topics/manifest/uses-permission-element) element.\n\nWhen using either of these elements, you can set the `maxSdkVersion` attribute\nto indicate that devices running a version of Android higher than\nthe specified value don't need a particular permission. This lets you\neliminate unnecessary permissions while still providing compatibility\nfor older devices.\n\nFor example, your app might show media content, such as photos\nor videos, that the user created while in your app. In this situation,\nyou don't need to use the\n[`READ_EXTERNAL_STORAGE`](https://developer.android.com/reference/android/Manifest.permission#READ_EXTERNAL_STORAGE)\npermission on devices that\nrun Android 10 (API level 29) or higher, as long as your app targets\nAndroid 10 or higher. However, for compatibility with older devices,\nyou can declare the `READ_EXTERNAL_STORAGE` permission and set the\n`android:maxSdkVersion` to 28."]]
