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    <p>I believe the answer to this is that one must use</p> <pre><code>public final void setPreviewTexture (SurfaceTexture surfaceTexture) Added in API level 11 Sets the SurfaceTexture to be used for live preview. Either a surface or surface texture is necessary for preview, and preview is necessary to take pictures. </code></pre> <p>from <a href="https://developer.android.com/reference/android/hardware/Camera.html" rel="nofollow noreferrer">https://developer.android.com/reference/android/hardware/Camera.html</a> . And from <a href="https://developer.android.com/reference/android/graphics/SurfaceTexture.html" rel="nofollow noreferrer">https://developer.android.com/reference/android/graphics/SurfaceTexture.html</a> :</p> <pre><code>The image stream may come from either camera preview or video decode. A SurfaceTexture may be used in place of a SurfaceHolder when specifying the output destination of a Camera or MediaPlayer object. Doing so will cause all the frames from the image stream to be sent to the SurfaceTexture object rather than to the device's display. </code></pre> <p>and I would really like to try this and send you some code, but I have no phone more recent than gingerbread, and this was introduced with honeycomb.</p> <p>Using a <code>surface</code> associated with an Activity, <code>surfaceDestroyed</code> is called sometime between <code>onPause</code> and <code>onStop</code> when the Activity is being minimised, although, oddly, not when the phone is being put to sleep: <a href="https://stackoverflow.com/questions/11495842/how-surfaceholder-callbacks-are-related-to-activity-lifecycle/13671391#13671391">How SurfaceHolder callbacks are related to Activity lifecycle?</a> But I hope that a <code>surfaceTexture</code> is not destroyed in this way.</p>
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    1. POandroid camera working after minimizing
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    1. COThere is one problem, when I start android camera with my app, camera becomes opened as another application, so I can't control that android camera from my app. Or may be I overlooked something. Any ideas?
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    2. COAh, you must be sending an intent to the camera app. Sorry, I was referring to a complete standalone recording application, like the one on github at http://stackoverflow.com/questions/13127914/android-focus-mode-continuous-video-and-capturing-preview-frames. I don't think the standard camera app will do what you want.
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    3. COSo I have to create my own camera? Any ideas how to start?
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