我看过类似的问题并尝试了他们的解决方案，但它对我不起作用。我正在尝试阅读width of an imageView，但它正在返回0。这是代码：
public class MainActivity extends Activity {
private ImageView image1;
float centerX,centerY;
private ImageView image2;
private boolean isFirstImage = true;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.rotate);
image1 = (ImageView) findViewById(R.id.ImageView01);
image2 = (ImageView) findViewById(R.id.ImageView02);
image2.setVisibility(View.GONE);
if (isFirstImage) {
applyRotation(0, 90);
isFirstImage = !isFirstImage;
}
}
private void applyRotation(float start, float end) {
centerX=image1.getWidth()/2.0f;
centerY=image1.getHeight()/2.0f;
final Flip3dAnimation rotation =
new Flip3dAnimation(start, end,centerX , centerY);
rotation.setDuration(500);
rotation.setFillAfter(true);
rotation.setInterpolator(new AccelerateInterpolator());
rotation.setAnimationListener(new DisplayNextView(isFirstImage, image1,
image2));
if (isFirstImage)
{
image1.startAnimation(rotation);
} else {
image2.startAnimation(rotation);
}
}
}
谁能帮我这个？谢谢
您需要使用onSizechanged() http://developer.android.com/reference/android/view/View.html#onSizeChanged%28int,%20int,%20int,%20int%29 method.
当该视图的大小发生变化时，在布局期间调用此方法
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