Android動畫之硬體加速

標籤：

你的動畫寫出來卡嘛？流暢嘛

如果你想提升動畫的效能，那就是用它－hardware layers。

During animations your views may be redrawn each frame. If you use view layers, instead of having to redraw each frame, views render once into an off-screen buffer which can be reused.

In addition, hardware layers are cached on the GPU, which makes certain operations during animation much faster. Simple transformations (translation, rotation, scaling and alpha) can be rendered quickly with layers. Since many animations are just a combination of these transformations, layers can supercharge animation performance.

 

如何使用：

 

http://developer.android.com/intl/zh-cn/reference/android/view/View.html#setLayerType(int, android.graphics.Paint)

 

 View.setLayerType().

 

當你想緩衝的時候就調用她：View.setLayerType(View.LAYER_TYPE_HARDWARE, null)

當動畫結束，就用它：View.setLayerType(View.LAYER_TYPE_NONE, null).

範例程式碼：

// Set the layer type to hardware myView.setLayerType(View.LAYER_TYPE_HARDWARE, null);// Setup the animationObjectAnimator animator = ObjectAnimator.ofFloat(myView, View.TRANSLATION_X, 150);// Add a listener that does cleanup animator.addListener(new AnimatorListenerAdapter() {    @Override  public void onAnimationEnd(Animator animation) {    myView.setLayerType(View.LAYER_TYPE_NONE, null);  }});// Start the animationanimator.start();  

　　

 

這地方是出處以及源碼呦，http://blog.danlew.net/2015/10/20/using-hardware-layers-to-improve-animation-performance/

Android動畫之硬體加速