Android 5.1系统动画的调节

2019年4月11日 682次阅读 来源: 周木水

项目需要从系统级别将Activity过渡动画全部关闭，在SettingsProvider中将TRANSITION_ANIMATION_SCALE设为0。

frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java

loadFractionSetting(stmt, Settings.System.TRANSITION_ANIMATION_SCALE,
                 R.fraction.def_window_transition_scale, 0);

另外：frameworks/base/services/core/java/com/android/server/wm/WindowManagerService.java

float mTransitionAnimationScaleSetting = 0.0f;

附：

frameworks/base/services/core/java/com/android/server/wm/WindowManagerService.java

    float mWindowAnimationScaleSetting = 1.0f;
    float mTransitionAnimationScaleSetting = 1.0f;
    float mAnimatorDurationScaleSetting = 1.0f;

以上三者依次作用于：

1.Window:作用于非Activity窗口。

2.Activity:过渡效果。

3.View:属性动画，涟漪效果等。

依次是开发者选项中以下几项：

窗口动画缩放

过渡动画缩放

动画程序时长缩放

《Android 5.1系统动画的调节》

WindowManagerService对应的代码：

    @Override
    public void setAnimationScale(int which, float scale) {
        if (!checkCallingPermission(android.Manifest.permission.SET_ANIMATION_SCALE,
                "setAnimationScale()")) {
            throw new SecurityException("Requires SET_ANIMATION_SCALE permission");
        }

        scale = fixScale(scale);
        switch (which) {
            case 0: mWindowAnimationScaleSetting = scale; break;
            case 1: mTransitionAnimationScaleSetting = scale; break;
            case 2: mAnimatorDurationScaleSetting = scale; break;
        }

        // Persist setting
        mH.sendEmptyMessage(H.PERSIST_ANIMATION_SCALE);
    }

    @Override
    public void setAnimationScales(float[] scales) {
        if (!checkCallingPermission(android.Manifest.permission.SET_ANIMATION_SCALE,
                "setAnimationScale()")) {
            throw new SecurityException("Requires SET_ANIMATION_SCALE permission");
        }

        if (scales != null) {
            if (scales.length >= 1) {
                mWindowAnimationScaleSetting = fixScale(scales[0]);
            }
            if (scales.length >= 2) {
                mTransitionAnimationScaleSetting = fixScale(scales[1]);
            }
            if (scales.length >= 3) {
                mAnimatorDurationScaleSetting = fixScale(scales[2]);
                dispatchNewAnimatorScaleLocked(null);
            }
        }

        // Persist setting
        mH.sendEmptyMessage(H.PERSIST_ANIMATION_SCALE);
    }

 

    @Override
    public float getAnimationScale(int which) {
        switch (which) {
            case 0: return mWindowAnimationScaleSetting;
            case 1: return mTransitionAnimationScaleSetting;
            case 2: return mAnimatorDurationScaleSetting;
        }
        return 0;
    }

    @Override
    public float[] getAnimationScales() {
        return new float[] { mWindowAnimationScaleSetting, mTransitionAnimationScaleSetting,
                mAnimatorDurationScaleSetting };
    }
    原文作者：周木水
    原文地址: https://blog.csdn.net/zhoumushui/article/details/51684984
    本文转自网络文章，转载此文章仅为分享知识，如有侵权，请联系博主进行删除。
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