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POCamera preview screen black when activity resumes
 

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    <p>I've been trying to get the camera section on my app working for about a week now, and after finally fixing a bug, it has created a new one. </p> <p>When I resume the activity, the preview doesn't work and neither does the recording functions. By looking at Logcat, I found out my <code>Camera</code> object is equal to null and I can't find a away to recreate it. </p> <p>My On Create</p> <pre><code>mCamera = getCameraInstance(); // Create preview view and set it as the content of our activity. mPreview = new CameraPreview(this, mCamera); preview = (FrameLayout) findViewById(R.id.previewer); preview.addView(mPreview); </code></pre> <p>Get Camera Instance Method</p> <pre><code>private Camera getCameraInstance() { Camera c = null; try { //c = Camera.open(); // attempt to get a Camera instance c = this.open(); // attempt to get a Camera instance } catch (Exception e) { // Camera is not available (in use or does not exist) } Log.i("TEST getCameraInstance", "" + c); return c; // returns null if camera is unavailable } </code></pre> <p>My On Pause</p> <pre><code>protected void onPause() { super.onPause(); try { // release the camera immediately on pause event // releaseCamera(); mCamera.stopPreview(); mCamera.setPreviewCallback(null); mCamera.release(); mCamera = null; } catch (Exception e) { e.printStackTrace(); } } </code></pre> <p>My on Resume</p> <pre><code>protected void onResume() { super.onResume(); try { mCamera = Camera.open(); mCamera = getCameraInstance(); Log.i("TEST onresume", "onResume Runing"); Log.i("TEST onresume", "camera " + mCamera); mCamera.setPreviewCallback(null); Log.i("TEST onresume", "camera " + mCamera); //mCamera = getCameraInstance(); Log.i("TEST onresume", "camera " + mCamera); // mCamera.setPreviewCallback(null); mPreview = new CameraPreview(MainRecordScreen.this, mCamera);// set preview Log.i("TEST onresume", "camera " + mCamera); preview.addView(mPreview); Log.i("TEST onresume", "camera " + mCamera); mCamera.startPreview(); } catch (Exception e) { Log.d(TAG, "Error starting camera preview: " + e.getMessage()); } Log.i("TEST onresume", "camera " + mCamera); } </code></pre> <p>My LogCat</p> <pre><code>06-19 06:38:40.223: E/AndroidRuntime(16702): FATAL EXCEPTION: main 06-19 06:38:40.223: E/AndroidRuntime(16702): java.lang.NullPointerException 06-19 06:38:40.223: E/AndroidRuntime(16702): at com.plcd.test.MainRecordScreen.prepareVideoRecorder(MainRecordScreen.java:198) 06-19 06:38:40.223: E/AndroidRuntime(16702): at com.plcd.test.MainRecordScreen.access$7(MainRecordScreen.java:193) 06-19 06:38:40.223: E/AndroidRuntime(16702): at com.plcd.test.MainRecordScreen$3.onClick(MainRecordScreen.java:115) 06-19 06:38:40.223: E/AndroidRuntime(16702): at android.view.View.performClick(View.java:3511) 06-19 06:38:40.223: E/AndroidRuntime(16702): at android.view.View$PerformClick.run(View.java:14105) 06-19 06:38:40.223: E/AndroidRuntime(16702): at android.os.Handler.handleCallback(Handler.java:605) 06-19 06:38:40.223: E/AndroidRuntime(16702): at android.os.Handler.dispatchMessage(Handler.java:92) 06-19 06:38:40.223: E/AndroidRuntime(16702): at android.os.Looper.loop(Looper.java:137) 06-19 06:38:40.223: E/AndroidRuntime(16702): at android.app.ActivityThread.main(ActivityThread.java:4424) 06-19 06:38:40.223: E/AndroidRuntime(16702): at java.lang.reflect.Method.invokeNative(Native Method) 06-19 06:38:40.223: E/AndroidRuntime(16702): at java.lang.reflect.Method.invoke(Method.java:511) 06-19 06:38:40.223: E/AndroidRuntime(16702): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 06-19 06:38:40.223: E/AndroidRuntime(16702): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 06-19 06:38:40.223: E/AndroidRuntime(16702): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p><code>mCamera</code> returns null from the <code>getCameraInstance()</code> method if it helps.</p>
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