turn Off/On Flash - Android android.hardware

Android examples for android.hardware:Flash

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Description

turn Off/On Flash

Demo Code



import android.content.Context;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.util.Log;

 class CameraUtils {

    public static final String TAG = "CameraUtils";
    public static Camera camera;
    public static boolean isFlashOn;
    public static boolean hasFlash;
    public static Parameters params;

    /**//ww  w. j  av  a  2s .  c o  m
     * Check if this device is supporting flashlight or not
     * 
     * @param context
     *            to access the Android resources
     * @return true if the device has flash support.
     */
    public static boolean deviceHasFlash(Context context) {

        hasFlash = context.getPackageManager().hasSystemFeature(
                PackageManager.FEATURE_CAMERA_FLASH);
        if (!hasFlash) {
            Log.d(TAG, "Device does not has flash");
            return false;
        }
        Log.d(TAG, "Device has flash");

        return true;
    }

    /**
     * init the camera and parameters
     * 
     * @return true if the initialize was ok.
     */
    public static boolean getCamera() {
        try {
            camera = null;
            camera = Camera.open();
            params = camera.getParameters();
            return true;
        } catch (Exception exception) {
            Log.e("Camera Error. Failed to Open. Error: ",
                    exception.getLocalizedMessage());
            return false;
        }
    }

    /**
     * Turn On flash ?
     */
    public static void turnOnFlash() {
        if (!isFlashOn) {
            if (camera == null || params == null) {
                return;
            }
            params.setFlashMode(Parameters.FLASH_MODE_TORCH);
            camera.setParameters(params);
            isFlashOn = true;
        }
    }

    /**
     * Turn off flash
     */
    public static void turnOffFlash() {
        if (isFlashOn) {
            if (camera == null || params == null) {
                return;
            }
            params.setFlashMode(Parameters.FLASH_MODE_OFF);
            camera.setParameters(params);
            isFlashOn = false;
        }
    }

    /**
     * Release the camera
     */
    public static void releaseCamera() {
        // release the camera
        if (camera != null) {
            camera.release();
            camera = null;
        }
    }

}

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