Android P Keyguard Scrim快速灭屏亮屏闪亮

MTK在android P上会出现在设置锁屏滑动时候，会出现快速灭屏亮屏闪亮现象。

在开发者模式关掉动画时不会出现此问题(Keyguard Scrim动画问题)

解决办法：setDuration(0),使keyguard scrim动画关闭,逻辑请打上callback查看。

堆栈打印参考: Android源码开发基本命令

/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/ScrimController.java
protected void updateScrims() {setScrimInFrontAlpha(mCurrentInFrontAlpha);setScrimBehindAlpha(mCurrentBehindAlpha);dispatchScrimsVisible();
}private void setScrimBehindAlpha(float alpha) {setScrimAlpha(mScrimBehind, alpha);
}private void setScrimInFrontAlpha(float alpha) {setScrimAlpha(mScrimInFront, alpha);
}private void setScrimAlpha(ScrimView scrim, float alpha) {if (alpha == 0f) {scrim.setClickable(false);} else {// Eat touch events (unless dozing or pulsing).scrim.setClickable(mState != ScrimState.AOD && mState != ScrimState.PULSING);}updateScrim(scrim, alpha);
}private void updateScrim(ScrimView scrim, float alpha) {...if (wantsAlphaUpdate || wantsTintUpdate) {if (mAnimateChange) {startScrimAnimation(scrim, currentAlpha);} else {// update the alpha directlyupdateScrimColor(scrim, alpha, getCurrentScrimTint(scrim));onFinished();}} else {onFinished();}
}private void startScrimAnimation(final View scrim, float current) {ValueAnimator anim = ValueAnimator.ofFloat(0f, 1f);final int initialScrimTint = scrim instanceof ScrimView ? ((ScrimView) scrim).getTint() :Color.TRANSPARENT;anim.addUpdateListener(animation -> {final float startAlpha = (Float) scrim.getTag(TAG_START_ALPHA);final float animAmount = (float) animation.getAnimatedValue();final int finalScrimTint = getCurrentScrimTint(scrim);final float finalScrimAlpha = getCurrentScrimAlpha(scrim);float alpha = MathUtils.lerp(startAlpha, finalScrimAlpha, animAmount);alpha = MathUtils.constrain(alpha, 0f, 1f);int tint = ColorUtils.blendARGB(initialScrimTint, finalScrimTint, animAmount);updateScrimColor(scrim, alpha, tint);dispatchScrimsVisible();});anim.setInterpolator(mInterpolator);anim.setStartDelay(mAnimationDelay);anim.setDuration(mAnimationDuration);   //setDuration(0),使keyguard scrim动画关闭，就不会出现android p快速灭屏出现闪屏 anim.addListener(new AnimatorListenerAdapter() {@Overridepublic void onAnimationEnd(Animator animation) {onFinished();scrim.setTag(TAG_KEY_ANIM, null);dispatchScrimsVisible();if (!mDeferFinishedListener && mOnAnimationFinished != null) {mOnAnimationFinished.run();mOnAnimationFinished = null;}}});// Cache alpha values because we might want to update this animator in the future if// the user expands the panel while the animation is still running.scrim.setTag(TAG_START_ALPHA, current);scrim.setTag(TAG_END_ALPHA, getCurrentScrimAlpha(scrim));scrim.setTag(TAG_KEY_ANIM, anim);anim.start();
}

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Android P Keyguard Scrim快速灭屏亮屏闪亮

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