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copied!<p>In onCreate() of my activity I add the following onClick listener to a button overlayed on my Preview SurfaceView (there are numerous example on the web for previewing):</p> <pre><code>ImageButton useOtherCamera = (ImageButton) findViewById(R.id.useOtherCamera); //if phone has only one camera, hide "switch camera" button if(Camera.getNumberOfCameras() == 1){ useOtherCamera.setVisibility(View.INVISIBLE); } else { useOtherCamera.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (inPreview) { camera.stopPreview(); } //NB: if you don't release the current camera before switching, you app will crash camera.release(); //swap the id of the camera to be used if(currentCameraId == Camera.CameraInfo.CAMERA_FACING_BACK){ currentCameraId = Camera.CameraInfo.CAMERA_FACING_FRONT; } else { currentCameraId = Camera.CameraInfo.CAMERA_FACING_BACK; } camera = Camera.open(currentCameraId); //Code snippet for this method from somewhere on android developers, i forget where setCameraDisplayOrientation(CameraActivity.this, currentCameraId, camera); try { //this step is critical or preview on new camera will no know where to render to camera.setPreviewDisplay(previewHolder); } catch (IOException e) { e.printStackTrace(); } camera.startPreview(); } </code></pre> <p>On my test device the back camera has an ID of 0 and the front has an id of 1. I suggest using Camera.CameraInfo static variables for your camera id's rather than hard-coding values. I am sure that will only cause issues on other devices.</p>

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