这三个“缩放”的具体含义如下：
窗口动画缩放：
Scaling factor for normal window animations. Setting to 0 will disable window animations. //作用于非Activity窗口
过渡动画缩放：
Scaling factor for activity transition animations. Setting to 0 will disable window animations. //作用于Activity窗口
动画程序时长缩放：
Scaling factor for Animator-based animations. This affects both the start delay and duration of all such animations. Setting to 0 will cause animations to end immediately. The default value is 1.//作用于全局的动画时长
代码关闭Android过度缩放动画
获取WindowManager句柄，通过binder调用WindowManagerService中setAnimationScale方法
//setAnimationScale(0.0f, 0.0f, 1.0f);
/**
* @para
* value1 窗口动画缩放
* value2 过渡动画缩放
* value3 Animator时长缩放
*/
private void setAnimationScale(float value1, float value2, float value3) {
IWindowManager mWindowManager = IWindowManager.Stub.asInterface(ServiceManager.getService(Context.WINDOW_SERVICE));
try {
float[] values = {value1, value2, value3};
mWindowManager.setAnimationScales(vars);
} catch (RemoteException e) {
e.printStackTrace();
}
}
修改开发者选项中动画缩放的默认值
frameworks/base/core/res/res/values/config.xml
0.5
frameworks/base/services/core/java/com/android/server/wm/WindowManagerService.java
private float mWindowAnimationScaleSetting = 0.5f;
private float mTransitionAnimationScaleSetting = 0.5f;
private float mAnimatorDurationScaleSetting = 0.5f;
当然，最好还是修改framework的默认值。(framework部分没有实践过，需要自己去尝试一下)
参考
