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POswitch back/front camera on fly
 

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    <p>If I use only <code>CAMERA_FACING_BACK</code> or <code>CAMERA_FACING_FRONT</code> all works fine.</p> <p>I have trouble with switch from <code>CAMERA_FACING_BACK</code> to <code>CAMERA_FACING_FRONT</code>.</p> <p>My code snippet:</p> <pre><code>public class PhotoCameraActivity extends Activity implements OnClickListener { private SurfaceView cameraView; private Button turnButton; private Camera camera = null; private Callback listener; private static int camId = Camera.CameraInfo.CAMERA_FACING_BACK; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.photo_camera_main); prepareActivity(); } private void prepareActivity() { cameraView = (SurfaceView) findViewById(R.id.photo_camera_surface_view); turnButton = (ImageButton) findViewById(R.id.turn_button); turnButton.setOnClickListener(this); } @Override public void onClick(View v) { if (v.equals(turnButton)) { if (Camera.getNumberOfCameras() &gt; 1 &amp;&amp; camId &lt; Camera.getNumberOfCameras() - 1) { startCamera(camId + 1); } else { startCamera(Camera.CameraInfo.CAMERA_FACING_BACK); } } } @Override protected void onResume() { startCamera(camId); super.onResume(); } @Override protected void onPause() { stopCamera(); super.onPause(); } private void startCamera(int cameraId) { if (camera != null) { stopCamera(); } holder = cameraView.getHolder(); listener = new Callback() { @Override public void surfaceDestroyed(SurfaceHolder holder) { } @Override public void surfaceCreated(SurfaceHolder holder) { try { camera.setPreviewDisplay(holder); camera.startPreview(); } catch (IOException e) { e.printStackTrace(); } } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {} }; holder.addCallback(listener); camId = cameraId; camera = Camera.open(cameraId); Camera.Parameters params = camera.getParameters(); if (cameraId == Camera.CameraInfo.CAMERA_FACING_BACK) { params.setPreviewSize(1280, 800); } else { params.setPreviewSize(640, 480); } camera.setParameters(params); } private void stopCamera(){ System.out.println("stopCamera method"); if (camera != null){ camera.stopPreview(); camera.setPreviewCallback(null); camera.release(); camera = null; holder.removeCallback(listener); holder = null; } } } </code></pre>
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    1. USAlex Cohn
    1. USDmytro Boichenko
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    1. COWhat is the nature of the "trouble" that you're having?
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      1. USEstel
    2. COIf I try to stop camera, viewfinder freezes and do not display image from another camera. But if I press "Back" and then again start this Activity, camera switches to front and it work fine again. I think I have trouble with shutdown camera and release resources.
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    3. COi have stuck with same problem
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      1. UShimanshu
 

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