android获取视图的所有子视图 [英] android get all subviews of a view

问题描述

我想获取 RelativeLayout 的所有子项.我使用代码得到了这个:

I want to get all children of a RelativeLayout. I get this using the code:

aditionView.getAllChildren().

但是现在子视图按照添加到该视图的顺序出现.但我希望它们按放置在视图中的位置递增顺序排列.

But now the subviews are coming in the order in which it is added into that view. But i want them in the increasing order of position in which it is placed in the view.

推荐答案

您可以通过 View.getLeft() 对子项进行排序

You could sort children by View.getLeft()

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    logCoordinates();
}

private void logCoordinates() {
    RelativeLayout layout = (RelativeLayout)findViewById(R.id.layout);
    for (int i = 0; i < layout.getChildCount(); i++) {
        View child = layout.getChildAt(i);
        Log.i("tag", String.format("%d %d %d %d", child.getLeft(), child.getTop(), child.getRight(), child.getBottom()));
    }
}

@Override
public void onWindowFocusChanged(boolean hasFocus) {
    logCoordinates();
}

请比较从 onCreate() 和 onWindowFocusChanged() 调用的 logCoordinates() 的日志输出.视图坐标在 onCreate() 中不可用(为什么?).请参阅此处的讨论如何获取按钮的高度和宽度

Please, compare log output of logCoordinates() called from onCreate() and from onWindowFocusChanged(). View coordinates are not available within onCreate() (why?). See discussion here How to get height and width of Button

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