【Android】获取控件的宽和高

来源：互联网发布：软件测试的基本技能编辑：程序博客网时间：2024/04/27 16:49

有时候我们需要在Activity的时候获取控件的宽和高来做一些操作，下面介绍三种获取宽和高的方式：

1. onWindowFocusChanged

@Override    public void onWindowFocusChanged(boolean hasFocus)    {        super.onWindowFocusChanged(hasFocus);        if (hasFocus)        {            int width = image.getMeasuredWidth();            int height = image.getMeasuredHeight();            Toast.makeText(MainActivity.this, "width = " + width + "---height = " + height, Toast.LENGTH_SHORT).show();        }    }

2. post方式

 @Override    protected void onStart()    {        super.onStart();        image.post(new Runnable()        {            @Override            public void run()            {                int width = image.getMeasuredWidth();                int height = image.getMeasuredHeight();                Toast.makeText(MainActivity.this, "onstart--width = " + width + "---height = " + height, Toast.LENGTH_SHORT).show();            }        });    }

3. ViewTreeObserver

 ViewTreeObserver observer = image.getViewTreeObserver();        observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener()        {            @Override            public void onGlobalLayout()            {                image.getViewTreeObserver().removeGlobalOnLayoutListener(this);                int width = image.getMeasuredWidth();                int height = image.getMeasuredHeight();                Toast.makeText(MainActivity.this, "onglobal--width = " + width + "---height = " + height, Toast.LENGTH_SHORT).show();            }        });

备注：以上image是ImageView控件

ImageView image = (ImageView)findViewById(R.id.image);

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