Android to determine whether there is a front facing camera and a rear facing camera

In general, we conduct camera operations, such as scanning 2-dimensional codes, and need to determine whether there is a rear camera (Rear camera). For example, Nexus 7 1 generation does not have a rear camera. In this way, when trying to use it, we need to make a judgment and carry out some prompts or processing.

The following code is a series 1 method to determine if there is a front camera (Front Camera) and a rear camera.

private static boolean checkCameraFacing(final int facing) {

    if (getSdkVersion() < Build.VERSION_CODES.GINGERBREAD) {

        return false;

    }

    final int cameraCount = Camera.getNumberOfCameras();

    CameraInfo info = new CameraInfo();

    for (int i = 0; i < cameraCount; i++) {

        Camera.getCameraInfo(i, info);

        if (facing == info.facing) {

            return true;

        }

    }

    return false;

}
public static boolean hasBackFacingCamera() {

    final int CAMERA_FACING_BACK = 0;

    return checkCameraFacing(CAMERA_FACING_BACK);

}
public static boolean hasFrontFacingCamera() {

    final int CAMERA_FACING_BACK = 1;

    return checkCameraFacing(CAMERA_FACING_BACK);

}
public static int getSdkVersion() {

    return android.os.Build.VERSION.SDK_INT;

}

Note: Since getNumberOfCameras and getCameraInfo are both introduced as API 9, the method is only applicable to 2.3 and above.

Read on: http: / / developer android. com/reference/android/hardware/Camera html http: / / developer android. com/reference/android/hardware/Camera CameraInfo. html