Android得到控件在屏幕中的坐標
getLocationOnScreen
getLocationInWindow
getLeft
如果在Activity的OnCreate()事件輸出那些參數,是全為0,要等UI控件都加載完了才能獲取到這些。
package xiaosi.location;import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.ImageView;
public class LocationActivity extends Activity { /* Called when the activity is first created. / private ImageView t = null; private Button button = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main);
t = (ImageView)findViewById(R.id.l); button = (Button)findViewById(R.id.button); button.setOnClickListener(new buttonListener()); } public class buttonListener implements OnClickListener{ public void onClick(View v) { int[] location = new int[2]; t.getLocationOnScreen(location); int x = location[0]; int y = location[1]; System.out.println("x:"+x+"y:"+y); System.out.println("圖片各個角Left:"+t.getLeft()+"Right:"+t.getRight()+"Top:"+t.getTop()+"Bottom:"+t.getBottom()); } }
}</pre>
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="<Button android:id="@+id/button" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="button"/> <ImageView android:id="@+id/l" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:src="@drawable/a" />
</LinearLayout></pre>