android - 缩放动画 - 如何停止 subview 动画

Question

我在这个布局中有一个布局(父 View )和一个 TextView ( subview )。在父 View 上应用缩放动画，但是当将缩放动画应用于父 View 时，其 subview 也会缩放。有什么方法可以阻止 child 使用动画吗？包括代码

布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.tfg.social.MainActivity$PlaceholderFragment" >

<FrameLayout
    android:id="@+id/top_layout"
    android:layout_width="match_parent"
    android:layout_height="100dp"

    android:layout_gravity="center"
    android:background="#ffff00"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:layout_gravity="center"
        android:text="Top Layout"
        android:background="#000000"
        android:adjustViewBounds="true"
        android:textAppearance="?android:attr/textAppearanceMedium" />
</FrameLayout>

动画方法

protected void expandLayout(View view) {
    ObjectAnimator scaleUpY = ObjectAnimator.ofFloat(view, "scaleY", 5f);
    scaleUpY.setDuration(1000);
    AnimatorSet scaleAnimation = new AnimatorSet();
    scaleAnimation.play(scaleUpY);
    scaleAnimation.start();

}

Answer 1

试试这个 -

ValueAnimator valueAnimator = ObjectAnimator.ofInt(start, end);
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
    @Override
    public void onAnimationUpdate(ValueAnimator valueAnimator) {
        int val = (Integer) valueAnimator.getAnimatedValue();
        LayoutParams layoutParams = (LayoutParams) getLayoutParams();
        layoutParams.height = val;
        setLayoutParams(layoutParams);
    }
});

valueAnimator.setDuration(300);
valueAnimator.start();