如何使用ObjectAnimator缩小ImageView,但是它是否保持其在布局中的位置？

Question

我试图在动画中缩放ImageView,但每当我这样做时,它似乎在布局中向下移动到左边.这是我动画之前的截图:

这里是动画后的样子:

是否可以将ImageView缩小,但左上角保留在布局的左上角？

这是我正在使用的代码:

// ScaleTestActivity.java

import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ImageView;

public class ScaleTestActivity extends Activity {

    ImageView mImageView;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mImageView = (ImageView)findViewById(R.id.image_view);
    }

    @Override
    protected void onResume() {
        super.onResume();

        ObjectAnimator scaleDownX = ObjectAnimator.ofFloat(mImageView, "scaleX", 0.5f);
        ObjectAnimator scaleDownY = ObjectAnimator.ofFloat(mImageView, "scaleY", 0.5f);

        scaleDownX.setDuration(1000);
        scaleDownY.setDuration(1000);

        AnimatorSet scaleDown = new AnimatorSet();

        scaleDown.play(scaleDownX).with(scaleDownY);
        scaleDown.start();
    }
}

布局:

<!-- main.xml -->
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <ImageView
        android:id="@+id/image_view"
        android:src="@drawable/droid"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true" />

</RelativeLayout>

可绘制资源:

Answer 1

您可以尝试将视图的pivotX和pivotY设置为0.从该点开始缩放.我认为它会正常工作.