/** Turns the LED on or off if phone has one. */
public synchronized void setFlashState(boolean state) {
// If the camera has already been opened, we apply the change immediately
if (mCamera != null) {
if (mStreaming && mMode == MODE_MEDIARECORDER_API) {
lockCamera();
}
Parameters parameters = mCamera.getParameters();
// We test if the phone has a flash
if (parameters.getFlashMode() == null) {
// The phone has no flash or the choosen camera can not toggle the flash
throw new RuntimeException("Can't turn the flash on !");
} else {
parameters.setFlashMode(state ? Parameters.FLASH_MODE_TORCH : Parameters.FLASH_MODE_OFF);
try {
mCamera.setParameters(parameters);
mFlashEnabled = state;
} catch (RuntimeException e) {
mFlashEnabled = false;
throw new RuntimeException("Can't turn the flash on !");
} finally {
if (mStreaming && mMode == MODE_MEDIARECORDER_API) {
unlockCamera();
}
}
}
} else {
mFlashEnabled = state;
}
}
protected synchronized void createCamera() throws RuntimeException {
if (mSurfaceView == null) throw new InvalidSurfaceException("Invalid surface !");
if (mSurfaceView.getHolder() == null || !mSurfaceReady)
throw new InvalidSurfaceException("Invalid surface !");
if (mCamera == null) {
openCamera();
mUpdated = false;
mUnlocked = false;
mCamera.setErrorCallback(
new Camera.ErrorCallback() {
@Override
public void onError(int error, Camera camera) {
// On some phones when trying to use the camera facing front the media server will die
// Whether or not this callback may be called really depends on the phone
if (error == Camera.CAMERA_ERROR_SERVER_DIED) {
// In this case the application must release the camera and instantiate a new one
Log.e(TAG, "Media server died !");
// We don't know in what thread we are so stop needs to be synchronized
mCameraOpenedManually = false;
stop();
} else {
Log.e(TAG, "Error unknown with the camera: " + error);
}
}
});
try {
// If the phone has a flash, we turn it on/off according to mFlashEnabled
// setRecordingHint(true) is a very nice optimization if you plane to only use the Camera
// for recording
Parameters parameters = mCamera.getParameters();
if (parameters.getFlashMode() != null) {
parameters.setFlashMode(
mFlashEnabled ? Parameters.FLASH_MODE_TORCH : Parameters.FLASH_MODE_OFF);
}
parameters.setRecordingHint(true);
mCamera.setParameters(parameters);
mCamera.setDisplayOrientation(mOrientation);
try {
if (mMode == MODE_MEDIACODEC_API_2) {
mSurfaceView.startGLThread();
mCamera.setPreviewTexture(mSurfaceView.getSurfaceTexture());
} else {
mCamera.setPreviewDisplay(mSurfaceView.getHolder());
}
} catch (IOException e) {
throw new InvalidSurfaceException("Invalid surface !");
}
} catch (RuntimeException e) {
destroyCamera();
throw e;
}
}
}
private void showFlashButton(Parameters params) {
boolean showFlash =
(getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)
&& params.getFlashMode() != null)
&& params.getSupportedFlashModes() != null
&& params.getSupportedFocusModes().size() > 1;
flashCameraButton.setVisibility(showFlash ? View.VISIBLE : View.INVISIBLE);
}
public void switchFlashLight() {
if (camera != null) {
Parameters parameter = camera.getParameters();
if (parameter.getFlashMode().equals(Parameters.FLASH_MODE_TORCH)) {
parameter.setFlashMode(Parameters.FLASH_MODE_OFF);
} else {
parameter.setFlashMode(Parameters.FLASH_MODE_TORCH);
}
camera.setParameters(parameter);
}
}