Hardware Acceleration

最新推荐文章于 2023-10-27 10:53:31 发布

转载最新推荐文章于 2023-10-27 10:53:31 发布 · 204 阅读

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原文链接：http://www.cnblogs.com/androidstudy/p/3951518.html

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#移动开发

本文详细介绍了Android中硬件加速的使用方法，包括在不同层级（应用、活动、窗口和视图）如何开启和关闭硬件加速，以及如何判断当前视图或画布是否处于硬件加速状态。

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硬件加速学习：

参考：http://blog.youkuaiyun.com/thinkinwm/article/details/8854649

硬件加速的级别：

Application:

可以打开和关闭硬件加速

<application android:hardwareAccelerated="true" ...>

Activity:

可以打开和关闭硬件加速

<application android:hardwareAccelerated="true">
    <activity ... />
    <activity android:hardwareAccelerated="false" />
</application>

Window:

只能打开，不能关闭

1 getWindow().setFlags(
2     WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED,
3     WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED);

View:

只能关闭，不能打开

myView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);

判断是否打开了硬件加速：

View.isHardwareAccelerated() returns true if the View is attached to a hardware accelerated window.
Canvas.isHardwareAccelerated() returns true if the Canvas is hardware accelerated

If you must do this check in your drawing code, use Canvas.isHardwareAccelerated() instead ofView.isHardwareAccelerated() when possible. When a view is attached to a hardware accelerated window, it can still be drawn using a non-hardware accelerated Canvas. This happens, for instance, when drawing a view into a bitmap for caching purposes.

转载于:https://www.cnblogs.com/androidstudy/p/3951518.html