Android 9.0去除Activity跳转动画

有客户要求界面跳转风格要统一，第三方的APP无法控制，所以需要从系统层把Activity跳转动画禁用

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

mDisableTransitionAnimation = context.getResources().getBoolean(
                com.android.internal.R.bool.config_disableTransitionAnimation);

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

boolean applyAnimationLocked(WindowManager.LayoutParams lp, int transit, boolean enter,
            boolean isVoiceInteraction) {

        if (mService.mDisableTransitionAnimation || !shouldAnimate(transit)) {
            if (DEBUG_APP_TRANSITIONS || DEBUG_ANIM) {
                Slog.v(TAG_WM, "applyAnimation: transition animation is disabled or skipped."
                        + " atoken=" + this);
            }
            cancelAnimation();
            return false;
        }
 

frameworks/base/core/res/res/values/config.xml

<bool name="config_disableTransitionAnimation">true</bool>
将属性值改为true，系统取消动画

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