如何创建棉花糖开放活动动画? [英] How do I create the Marshmallow open activity animation?
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问题描述
我正在编写启动器. 如何启动一项活动来显示棉花糖动画?
I am writing a launcher. How do I start an activity to show the Marshmallow animation?
我看过AOSP Launcher3源码,但发现它只能使用它:
I have looked at the AOSP Launcher3 source and only found it to use this:
if (useLaunchAnimation) {
ActivityOptions opts = Utilities.isLmpOrAbove() ?
ActivityOptions.makeCustomAnimation(this, R.anim.task_open_enter, R.anim.no_anim) :
ActivityOptions.makeScaleUpAnimation(v, 0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
optsBundle = opts.toBundle();
}
然后陷入困境
startActivity(context, optsBundle);
task_open_enter动画如下所示:
Where the task_open_enter animation looks like this:
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:background="#ff000000"
android:shareInterpolator="false"
android:zAdjustment="top">
<alpha
android:duration="167"
android:fillAfter="true"
android:fillBefore="true"
android:fillEnabled="true"
android:fromAlpha="0"
android:interpolator="@interpolator/decelerate_quart"
android:startOffset="0"
android:toAlpha="1.0" />
<translate
android:duration="417"
android:fillAfter="true"
android:fillBefore="true"
android:fillEnabled="true"
android:fromYDelta="110%"
android:interpolator="@interpolator/decelerate_quint"
android:startOffset="0"
android:toYDelta="0" />
</set>
不幸的是,这些与我想要的棉花糖动画不同,如下所示:
Unfortunately these are not the same as the Marshmallow animation I am looking for, as shown below:
(gif减慢了3倍)
推荐答案
I found the answer in the launcher source code here:
Bundle optsBundle = null;
ActivityOptions opts = null;
if (Utilities.ATLEAST_MARSHMALLOW) {
int left = 0, top = 0;
int width = v.getMeasuredWidth(), height = v.getMeasuredHeight();
// if (v instanceof TextView) {
// // Launch from center of icon, not entire view
// Drawable icon = Workspace.getTextViewIcon((TextView) v);
// if (icon != null) {
// Rect bounds = icon.getBounds();
// left = (width - bounds.width()) / 2;
// top = v.getPaddingTop();
// width = bounds.width();
// height = bounds.height();
// }
// }
opts = ActivityOptions.makeClipRevealAnimation(v, left, top, width, height);
} else if (!Utilities.ATLEAST_LOLLIPOP) {
// Below L, we use a scale up animation
opts = ActivityOptions.makeScaleUpAnimation(v, 0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
} else if (Utilities.ATLEAST_LOLLIPOP_MR1) {
// On L devices, we use the device default slide-up transition.
// On L MR1 devices, we use a custom version of the slide-up transition which
// doesn't have the delay present in the device default.
opts = ActivityOptions.makeCustomAnimation(context, R.anim.task_open_enter, R.anim.no_anim);
}
optsBundle = opts != null ? opts.toBundle() : null;
context.startActivity(intent, optsBundle);
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