硬件加速

Hardware.java

硬件加速分四个等级
Application Level:<application android:hardwareAccelerated="true" ...>
Activity Level:<application android:hardwareAccelerated="true">
          <activity ... />
          <activity android:hardwareAccelerated="false" />
         </application>
即使在Application层开启了硬件加速,也可以对单个的Activity选择是否开启硬件加速
Window Level: getWindow().setFlags(
                              WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED,
                              WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED);
View Level:  myView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);