我对 android 动画不太熟悉,但一种(有点黑客)方法是将图像包装在ClipDrawable
并为其设置动画level
价值。例如:
<ImageView
android:id="@+id/imageView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/clip_source" />
Where clip_source
是一个可绘制的:
<?xml version="1.0" encoding="utf-8"?>
<clip xmlns:android="http://schemas.android.com/apk/res/android"
android:clipOrientation="vertical"
android:drawable="@drawable/your_own_drawable"
android:gravity="bottom" />
然后在代码中你会得到:
// a field in your class
private int mLevel = 0;
ImageView img = (ImageView) findViewById(R.id.imageView1);
mImageDrawable = (ClipDrawable) img.getDrawable();
mImageDrawable.setLevel(0);
mHandler.post(animateImage);
The animateImage
is a Runnable
object:
private Runnable animateImage = new Runnable() {
@Override
public void run() {
doTheAnimation();
}
};
and the doTheAnimation
method:
private void doTheAnimation() {
mLevel += 1000;
mImageDrawable.setLevel(mLevel);
if (mLevel <= 10000) {
mHandler.postDelayed(animateImage, 50);
} else {
mHandler.removeCallbacks(animateImage);
}
}