如何获得按钮坐标? [英] How get Button coordinate?

问题描述

我有一个布局activity_main.xml:

I have a layout activity_main.xml:

    <Button
        android:id="@+id/button"
        android:layout_marginTop="50dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal|top"
        android:text="@string/hover"/>

</FrameLayout>

如何在屏幕上获取Button的坐标(x，y).现在我用:

How can i get Button's coordinate (x, y) on screen. for now I use:

button.getX()
button.getY()

但它是return 0.0，我该如何实现.
谢谢

but it return 0.0, How can i achieve this.
Thanks

推荐答案

之所以会发生这种情况，是因为在实际显示视图之前先获取其坐标.

This happens because you are getting the coordinates of your view before it's actually shown.

您可以使用View.post()方法，该方法会在正确初始化View后执行一些代码.

You can use the View.post() method, which executes some code after your View is properly initalized.

mButton.post(
    new Runnable(){
        @Override
        public void run(){
            x = mButton.getX();
            y = mButton.getY();
        }
    }
);

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