安卓.重力变化动画 [英] Android. Animation on gravity change

问题描述

我在另一个框架中有一个FrameLayout.它与中心对齐.

I have a FrameLayout within another one. It is aligned to the center.

不，我想通过更改其重力使其与顶部对齐，但我也想为该更改设置动画.

No I want to align it to top by changing it gravity, but I also want to animate this change.

我已经在这里 https://stackoverflow.com/a/33192335/408780 找到了答案，但是是LayoutTransition.更改使用那里需要API16.

I already found this answer here https://stackoverflow.com/a/33192335/408780, but LayoutTransition.CHANGING using there needs API 16.

我们的应用程序的minSdk为14.关于如何设置重力变化的任何建议?

Our app's however minSdk is 14. Any suggestions how to animate gravity change?

提前谢谢

<FrameLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/background"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/bg"
        android:scaleType="centerCrop"/>

    <FrameLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:animateLayoutChanges="true">
        <ImageView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:scaleType="fitXY"
            android:src="@drawable/container_bg"/>
        <EditText
            android:layout_gravity="center_vertical"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"/>
    </FrameLayout>
</FrameLayout>

推荐答案

添加

compile 'com.android.support:transition:25.2.0'

您的应用依赖项. 然后，在更改重力之前添加此行(android.support.transition包中的TransitionManager)

to your app dependencies. Then, add this line before change gravity (TransitionManager from android.support.transition package)

TransitionManager.beginDelayedTransition(parentOfAnimatedView);

例如

mContainer.setOnClickListener(v -> {
        TransitionManager.beginDelayedTransition((ViewGroup) mContainer.getParent());
        FrameLayout.LayoutParams layoutParams = (FrameLayout.LayoutParams) mContainer.getLayoutParams();
        layoutParams.gravity = Gravity.TOP;
        mContainer.setLayoutParams(layoutParams);
    });

这篇关于安卓.重力变化动画的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！