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POReopening camera after intent chooser is canceled
 

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    <p>I have created a custom camera preview view <code>CameraView</code> which extends <code>SurfaceView</code>, and it also implements <code>SurfaceHolder.Callback</code> interface. The view operates with the camera. When you open the view it shows a camera preview. On the same screen there is also overlay with two buttons - 'Take picture', 'Choose from gallery'. The activity that holds the <code>CameraView</code> releases and reopens the camera in <code>onPause()</code> and <code>onResume()</code> methods.</p> <p>If I click the 'Choose from gallery' button, the following intent is created:</p> <pre><code>Intent intent = new Intent(Intent.ACTION_GET_CONTENT); intent.setType("image/*"); startActivityForResult(intent, LOAD_PICTURE); </code></pre> <p>If there is only one activity that can respond to this intent then it's fine. The activity gets automatically opened, the camera is released. I can also hit back when on the gallery and I will get back into the <code>CameraView</code> activity, and camera preview is restored.</p> <p>The interesting part starts if there are multiple activities that can handle this intent, and the intent chooser dialog pops up. When intent chooser dialog spawns, <code>onPause()</code> gets called in parent activity and camera gets released, the screen becomes black. If I dont choose intent from the dialog, but instead click back button on the phone <code>onResume()</code> is called, but camera preview is never coming back. To get the camera preview to show again, I need to go back to previous activity and go back inside the preview activity.</p> <p>The following problem happens because, when the dialog is raised only <code>onPause()</code> gets called, but if I actually switch to different activity <code>surfaceDestroyed()</code> get called also. The same is true for <code>onResume()</code> when the dialog is canceled with back button, <code>surfaceChanged()</code> and <code>surfaceCreated()</code> never gets called.</p> <p>My question is how to get camera preview to reappear if the intent chooser dialog is canceled. Is there a way how to trigger <code>SurfaceHolder.Callback</code> methods explicitly? I know that there are hidden <code>hideSurface()</code> and <code>showSurface()</code> in <code>SurfaceView</code>, but I don't want to go this route.</p>
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    1. COHave you tried to release the camera in the onStop() method instead? Similarly, you could open/reopen the camera preview in onStart().
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