更改LayoutParams(RelativeLayout)的动画 [英] Animate changing LayoutParams (RelativeLayout)

问题描述

当我单击RelativeLayout时，它会更改大小. 我怎样才能使这一变化动起来?这样看起来矩形会变成全屏显示吗?

when I click on a RelativeLayout it change the size. How can I make this change animated? So it looks like the rectangle grows to full screen?

我的布局:

<RelativeLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" 
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" 
tools:context=".MainActivity"
android:background="#ff000000">

<RelativeLayout
    android:id="@+id/srLayout"
    android:layout_width="62.5dp"
    android:layout_height="132.5dp"
    android:layout_alignParentTop="true"
    android:layout_alignParentEnd="false"
    android:layout_alignParentRight="true"
    android:layout_marginRight="10dp"
    android:layout_marginEnd="10dp"
    android:layout_marginTop="10dp"
    android:clickable="true"
    android:onClick="sleepRoom"
    android:background="#ffffffff"></RelativeLayout>

</RelativeLayout>

代码:

public void sleepRoom(View view) {
    RelativeLayout sr = (RelativeLayout) findViewById(view.getId());
    RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) sr.getLayoutParams();
    params.height = RelativeLayout.LayoutParams.MATCH_PARENT;
    params.width = RelativeLayout.LayoutParams.MATCH_PARENT;
    sr.setLayoutParams(params);
}

推荐答案

在这种情况下，要显式制作动画，您的sleepRoom()应该看起来像这样.

To explicitly animate in this case, your sleepRoom() should look like this.

public void sleepRoom(View view) {
    final RelativeLayout sr = (RelativeLayout) view;
    RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) sr.getLayoutParams();
    params.height = RelativeLayout.LayoutParams.MATCH_PARENT;
    params.width = RelativeLayout.LayoutParams.MATCH_PARENT;
    sr.setLayoutParams(params);

    PropertyValuesHolder pvhLeft = PropertyValuesHolder.ofInt("left", 0, 1);
    PropertyValuesHolder pvhTop = PropertyValuesHolder.ofInt("top", 0, 1);
    PropertyValuesHolder pvhRight = PropertyValuesHolder.ofInt("right", 0, 1);
    PropertyValuesHolder pvhBottom = PropertyValuesHolder.ofInt("bottom", 0, 1);
    PropertyValuesHolder pvhRoundness = PropertyValuesHolder.ofFloat("roundness", 0, 1);


    final Animator collapseExpandAnim = ObjectAnimator.ofPropertyValuesHolder(sr, pvhLeft, pvhTop,
            pvhRight, pvhBottom, pvhRoundness);
    collapseExpandAnim.setupStartValues();

    sr.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
        @Override
        public boolean onPreDraw() {
            sr.getViewTreeObserver().removeOnPreDrawListener(this);
            collapseExpandAnim.setupEndValues();
            collapseExpandAnim.start();
            return false;
        }
    });
}

但是，通常android:animateLayoutChanges="true"应该可以工作.

However, normally android:animateLayoutChanges="true" should work.

有关切特·海瑟(Chet Haase)男子的更多详细信息，请参见: https://www.youtube. com/watch?v = 55wLsaWpQ4g

For more specifics from the man Chet Haase, see: https://www.youtube.com/watch?v=55wLsaWpQ4g

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