Question

我在我的应用程序中使用camera2 api，但是一些像Redmi note 3这样的设备即使这些设备使用棒棒糖安卓版也不支持它。现在我的查询是如何在我的应用程序中检查设备是否支持camera2 api

Answer 1

尝试以下代码
检查设备中是否有前置摄像头

public static boolean checkCameraFront(Context context) {
 if(context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FRONT)) {
    return true;
} else {
    return false;
  }
}

检查设备中是否有后置摄像头

public static boolean checkCameraRear() {
int numCamera = Camera.getNumberOfCameras();
if(numCamera > 0) {
    return true;
} else {
    return false;
   }
 }

Answer 2

所有通过认证的Android设备都支持从API级别21（Lollipop）开始的camera2 API。

某些设备可能不支持所有可能的功能，例如手动控制或RAW捕获，但基本API应始终有效。

Answer 3

请访问this我希望它对您有所帮助

Answer 4

以下是确定设备中哪些摄像头具有Full或Limited Camera2 API支持的片段（只需调用checkCamera2Support方法）：

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
        public boolean allowCamera2Support(int cameraId) {
            CameraManager manager = (CameraManager)getSystemService(Context.CAMERA_SERVICE);
            try {
                String cameraIdS = manager.getCameraIdList()[cameraId];
                CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraIdS);
                int support = characteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL);

                if( support == CameraMetadata.INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY )
                    Log.d(TAG, "Camera " + cameraId + " has LEGACY Camera2 support");
                else if( support == CameraMetadata.INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED )
                    Log.d(TAG, "Camera " + cameraId + " has LIMITED Camera2 support");
                else if( support == CameraMetadata.INFO_SUPPORTED_HARDWARE_LEVEL_FULL )
                    Log.d(TAG, "Camera " + cameraId + " has FULL Camera2 support");
                else
                    Log.d(TAG, "Camera " + cameraId + " has unknown Camera2 support?!");

            return support == CameraMetadata.INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED || support == CameraMetadata.INFO_SUPPORTED_HARDWARE_LEVEL_FULL;
        }
        catch (CameraAccessException e) {
            e.printStackTrace();
        }
        return false;
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    private void checkCamera2Support() {
        if( Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ) {
            if( getNumberOfCameras() == 0 ) {
                    Log.d(TAG, "0 cameras");
            }else {
                for (int i = 0; i < getNumberOfCameras(); i++) {
                    if (!allowCamera2Support(i)) {
                        Log.d(TAG, "camera " + i + " doesn't have limited or full support for Camera2 API");
                    }else{
                        // here you can get ids of cameras that have limited or full support for Camera2 API
                    }
                }
            }
        }
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public int getNumberOfCameras() {
        CameraManager manager = (CameraManager)getSystemService(Context.CAMERA_SERVICE);
        try {
            return manager.getCameraIdList().length;
        } catch (CameraAccessException e) {
            e.printStackTrace();
        } catch(AssertionError e) {
            e.printStackTrace();
        }
        return 0;
    }

如何确定当前设备是否支持camera2 api

4 个答案: