如何设置固定纵横比为Android的布局 [英] How to set fixed aspect ratio for a layout in Android

问题描述

我试图设置布局为FILL_PARENT，而具有视图的高度一样的长度，使布局的方形的宽度。

I am trying to set the width of the layout to "fill_parent" while having the height of the view just the same length, to make the layout a square.

任何建议将AP preciate，在此先感谢！ ：D

Any suggestions will be appreciate, thanks in advance! :D

推荐答案

您可以尝试最初设定layout_height到WRAP_CONTENT。但是，从那里，我认为你必须去到code。只是为了实验，在您的活动尝试是这样的：

You might try initially setting the layout_height to wrap_content. But from there I think you have to go into code. Just to experiment, in your activity try something like:

@Override
public void onResume(){
    super.onResume();
    findViewById(R.id.squareView).getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
        @Override public void onGlobalLayout() {
            View squareView = findViewById(R.id.squareView);
            LayoutParams layout = squareView.getLayoutParams();
            layout.height = squareView.getWidth();
            squareView.setLayoutParams(layout);
            squareView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
        }
    });
}

在哪里R.id.squareView是有问题的视图的ID。并注意，这code被包裹在onGlobalLayout呼吁，以确保squareView.getWidth（）有一个有意义的值。

Where R.id.squareView is the id of the view in question. And note, this code is wrapped in the onGlobalLayout call to ensure that squareView.getWidth() has a meaningful value.

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