android 获取视图的所有子视图

发布于 2024-12-10 04:43:43 字数 168 浏览 0 评论 0原文

我想获取 RelativeLayout 的所有子级。我使用代码得到了这个：

aditionView.getAllChildren().

但现在子视图按照添加到该视图的顺序出现。但我希望它们按照其在视图中放置的位置的递增顺序排列。

原文

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

aditionView.getAllChildren().

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.

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黎夕旧梦 2024-12-17 04:43:43

您可以通过 View.getLeft() 对子项进行排序

@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 logCooperatives() 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< /a>

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();
}

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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