我使用下面的code。但所有的方法都返回零值。我知道，得到的观点我们认为应绘制的坐标。这就是为什么我现在用的是code在onResume方法，但仍无法正常工作。你知道吗？

  @覆盖
公共无效onResume（）{
    super.onResume（）;
    的System.out.println（Onresume）;
    的System.out.println（TAB1  - 左边的+ btn_Tab7 .getLeft（））;
    的System.out.println（TAB1  - 顶+ btn_Tab7.getTop（））;
    的System.out.println（TAB1  - 右+ btn_Tab7.getRight（））;
    的System.out.println（TAB1  - 底+ btn_Tab7.getBottom（））;
}
 

解决方案

在 onResume 其为时尚早getLeft，GetRight时... 做到这一点的 onWindowFocusChanged

  @覆盖
公共无效onWindowFocusChanged（布尔hasFocus）{
    super.onWindowFocusChanged（hasFocus）;
    如果（hasFocus）{
        的System.out.println（onWindowFocusChanged）;
        的System.out.println（TAB1  - 左边的+ btn_Tab7 .getLeft（））;
        的System.out.println（TAB1  - 顶+ btn_Tab7.getTop（））;
        的System.out.println（TAB1  - 右+ btn_Tab7.getRight（））;
        的System.out.println（TAB1  - 底+ btn_Tab7.getBottom（））;
    }
}
 

从onResume文档：

请注意， onResume是不是最好的指标，你的   活动是用户可见;一个系统窗口，如键盘锁   可能是在前面。使用onWindowFocusChanged（布尔）肯定知道   您的活动是用户可见的（例如，恢复一个   游戏）。

I am using following code. But all methods are returning zero value. I know that to get the coordinates of the view our view should be drawn. That why i am using the code in onResume method but still not working. Any Idea?

 @Override
public void onResume(){
    super.onResume();
    System.out.println("Onresume"); 
    System.out.println("tab1 - left" + btn_Tab7 .getLeft());
    System.out.println("tab1 - Top" + btn_Tab7.getTop());
    System.out.println("tab1 - right" + btn_Tab7.getRight());
    System.out.println("tab1 - bottom" + btn_Tab7.getBottom()); 
}

in onResume its too early to call getLeft, getRight ... Do it in onWindowFocusChanged

@Override
public void onWindowFocusChanged (boolean hasFocus){
    super.onWindowFocusChanged(hasFocus);
    if(hasFocus){
        System.out.println("onWindowFocusChanged"); 
        System.out.println("tab1 - left" + btn_Tab7 .getLeft());
        System.out.println("tab1 - Top" + btn_Tab7.getTop());
        System.out.println("tab1 - right" + btn_Tab7.getRight());
        System.out.println("tab1 - bottom" + btn_Tab7.getBottom());
    }
}

Documentation from onResume:

Keep in mind that onResume is not the best indicator that your activity is visible to the user; a system window such as the keyguard may be in front. Use onWindowFocusChanged(boolean) to know for certain that your activity is visible to the user (for example, to resume a game).