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POCrash with hardware acceleration of fragment transition animations
 

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  1. POCrash with hardware acceleration of fragment transition animations
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    <p>I am using a slide-in / slide-out animation for fragment transitions. To smoothen out these animations I am using hardware acceleration by setting the layer type of the fragment to <code>View.LAYER_TYPE_HARDWARE</code> before the animation and back to <code>View.LAYER_TYPE_NONE</code> if the animation is completed.</p> <pre><code>public Animation onCreateAnimation(int transit, boolean enter, int nextAnim) { if (getFragmentManager().getBackStackEntryCount() == 0) { return super.onCreateAnimation(transit, enter, nextAnim); } if (nextAnim == 0) { nextAnim = enter ? android.R.anim.slide_in_left : android.R.anim.slide_out_right; } Animation animation = AnimationUtils.loadAnimation(getActivity(), nextAnim); // smoothening animations if (animation != null) { getView().setLayerType(View.LAYER_TYPE_HARDWARE, null); animation.setAnimationListener(new AnimationListener() { @Override public void onAnimationEnd(Animation animation) { if (getView() != null) { getView().setLayerType(View.LAYER_TYPE_NONE, null); } } @Override public void onAnimationRepeat(Animation arg0) { } @Override public void onAnimationStart(Animation arg0) { } }); } return animation; } </code></pre> <p>I recently discovered, that my app crashes randomly on some transitions only on some devices with <code>Fatal signal 11 (SIGSEGV) at 0x00000000 (code=1)</code>. I could narrow down the error to the line where the layer-type is set to <code>HARDWARE</code>. If I set it to <code>NONE</code> or <code>SOFTWARE</code> everything works fine.</p> <p>What am I doing wrong? Thanks in advance for any help!</p> <p>EDIT: This seems to be an Android 4.3-specific bug. These crashes can be reproduced on 4.3 devices and the 4.3 emulator (host-GPU enabled). It is fine on Android 4.1, 4.2.2 and 4.4.</p> <p>I am disabling hardware acceleration for 4.3 as a workaround. Hardware acceleration is only needed on older devices with slower processing power in my use case - and these are very unlikely to have 4.3. But anyways, it would be nice if someone had an idea how this is really fixed.</p>
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