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POCamera crashes in android 4.1(API level 16)
 

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  1. POCamera crashes in android 4.1(API level 16)
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    <p>My application has a camera functionality. It works fine in all Android version but now when i tested in S3 it crashes. The error points to this line:</p> <pre><code>Parameters parameters = mCamera.getParameters(); </code></pre> <p>In:</p> <pre><code>public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { // Log.e(TAG, "surfaceChanged"); // XXX stopPreview() will crash if preview is not running if (mPreviewRunning) { mCamera.stopPreview(); } /** * CODE TO RESOLVE CAMERA ORIENTATION PROBLEM START */ Display display = ((WindowManager) getSystemService(WINDOW_SERVICE)) .getDefaultDisplay(); int flashStatus = session1.getFlashStatus(); Parameters parameters = mCamera.getParameters(); if (flashStatus == 0) { btnFlash.setBackgroundResource(R.drawable.flash); parameters.setFlashMode(Parameters.FLASH_MODE_AUTO); mCamera.setParameters(parameters); } else if (flashStatus == 1) { btnFlash.setBackgroundResource(R.drawable.flash_on); parameters.setFlashMode(Parameters.FLASH_MODE_ON); mCamera.setParameters(parameters); } else { btnFlash.setBackgroundResource(R.drawable.flash_off); parameters.setFlashMode(Parameters.FLASH_MODE_OFF); mCamera.setParameters(parameters); } int currentapiVersion = android.os.Build.VERSION.SDK_INT; if (currentapiVersion &gt;= android.os.Build.VERSION_CODES.FROYO) { // Do something for froyo and above versions if (display.getRotation() == Surface.ROTATION_0) { // parameters.setPreviewSize(h, w); mCamera.setDisplayOrientation(90); } if (display.getRotation() == Surface.ROTATION_90) { // parameters.setPreviewSize(w, h); } if (display.getRotation() == Surface.ROTATION_180) { // parameters.setPreviewSize(h, w); mCamera.setDisplayOrientation(-90); } if (display.getRotation() == Surface.ROTATION_270) { // parameters.setPreviewSize(w, h); mCamera.setDisplayOrientation(90); } } else { // do something for phones running an SDK before level 9 if (display.getOrientation() == Surface.ROTATION_0) { // parameters.setPreviewSize(h, w); mCamera.setDisplayOrientation(90); } if (display.getOrientation() == Surface.ROTATION_90) { mCamera.setDisplayOrientation(90); // parameters.setPreviewSize(w, h); } if (display.getOrientation() == Surface.ROTATION_180) { mCamera.setDisplayOrientation(90); // parameters.setPreviewSize(h, w); } if (display.getOrientation() == Surface.ROTATION_270) { mCamera.setDisplayOrientation(90); // parameters.setPreviewSize(w, h); // mCamera.setDisplayOrientation(180); } } mCamera.setParameters(parameters); /** * CODE TO RESOLVE CAMERA ORIENTATION PROBLEM END */ try { mCamera.setPreviewDisplay(mSurfaceHolder); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } if (mPreviewRunning) { mCamera.stopPreview(); mCamera.startPreview(); mPreviewRunning = true; } else { mCamera.startPreview(); mPreviewRunning = true; } } public void surfaceDestroyed(SurfaceHolder holder) { Log.e(TAG, "surfaceDestroyed"); if (mPreviewRunning) { mCamera.stopPreview(); mPreviewRunning = false; mCamera.release(); } } </code></pre> <p>Could someone provide a solution for this? The log is below:</p> <pre><code>?:??: W/?(?): java.lang.NullPointerException ?:??: W/?(?): at com.stpl.snapshun.camera.CameraActivity.surfaceChanged(CameraActivity.java:313) ?:??: W/?(?): at android.view.SurfaceView.updateWindow(SurfaceView.java:554) ?:??: W/?(?): at android.view.SurfaceView.access$000(SurfaceView.java:81) ?:??: W/?(?): at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:169) ?:??: W/?(?): at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:671) ?:??: W/?(?): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1818) ?:??: W/?(?): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:998) ?:??: W/?(?): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4212) ?:??: W/?(?): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725) ?:??: W/?(?): at android.view.Choreographer.doCallbacks(Choreographer.java:555) ?:??: W/?(?): at android.view.Choreographer.doFrame(Choreographer.java:525) ?:??: W/?(?): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711) ?:??: W/?(?): at android.os.Handler.handleCallback(Handler.java:615) ?:??: W/?(?): at android.os.Handler.dispatchMessage(Handler.java:92) ?:??: W/?(?): at android.os.Looper.loop(Looper.java:137) ?:??: W/?(?): at android.app.ActivityThread.main(ActivityThread.java:4745) ?:??: W/?(?): at java.lang.reflect.Method.invokeNative(Native Method) ?:??: W/?(?): at java.lang.reflect.Method.invoke(Method.java:511) ?:??: W/?(?): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) ?:??: W/?(?): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) ?:??: W/?(?): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>My issue here is trying to access camera parameters returns null.</p> <p>Thanks in advance</p>
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    1. COCould you provide your `CameraActivity` source? It is obvious that `mCamera` is null, but it difficult to determine why.
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