如何获取的高度和宽度巴顿 [英] How to get height and width of Button

问题描述

我创建按钮阵列。现在，我想找到按钮的高度和宽度，并为我用的getWidth（）和getHeight（）。但事实是，它总是返回0。这究竟是为什么？我送我的code，请检查什么是错的。

  INT X，Y;
    的LinearLayout layoutVertical =（的LinearLayout）findViewById（R.id.liVLayout）;
    LinearLayout中RowLayout的= NULL;

    的LayoutParams参数=新LinearLayout.LayoutParams（LayoutParams.FILL_PARENT，LayoutParams.FILL_PARENT，1）;

    //创建按钮
    的for（int i = 0; I＆LT; 6，我++）
    {
        RowLayout的=新的LinearLayout（本）;
        rowLayout.setWeightSum（7）;
        layoutVertical.addView（RowLayout的，参数）;

        为（诠释J = 0; J＆小于7; J ++）
        {
            m_pBtnDay [I] [J] =新的按钮（这一点）;

            rowLayout.addView（m_pBtnDay [I] [J]，参数）;

            m_pBtnDay [I] [J] .setOnLongClickListener（本）;

            m_pBtnDay [I] [J] .setGravity（Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL）;
            m_pBtnDay [I] [J] .setTextSize（12）;
        }
    }
    X = m_pBtnDay [I] [J] .getWidth（）;
    Y = m_pBtnDay [I] [J] .getHeight（）;
    Log.d（宽度，Integer.toString（X））;
    Log.d（高度，Integer.toString（Y））;
    返回true;
 

解决方案

也许你正在调用的getWidth（）和的getHeight（）太早：我觉得用户界面一直没有大小和布局在屏幕上尚未...
你可以尝试把那个code这里面：

  @覆盖
公共无效onWindowFocusChanged（布尔hasFocus）{
    super.onWindowFocusChanged（hasFocus）;
    //调用这里的getWidth（）和getHeight（）
 }
 

I have created an array of buttons. Now I want to find the height and width of the button, and for that i have used getWidth() and getHeight(). But the thing is that it always return 0. Why is this happening? I have send my code, please check if anything is wrong.

    int x,y;
    LinearLayout layoutVertical = (LinearLayout) findViewById(R.id.liVLayout);
    LinearLayout rowLayout = null;

    LayoutParams param = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT, 1);

    //Create Button
    for (int i = 0; i<6; i++)
    {
        rowLayout = new LinearLayout(this);
        rowLayout.setWeightSum(7);
        layoutVertical.addView(rowLayout, param);   

        for(int j=0; j<7; j++)
        {
            m_pBtnDay[i][j] = new Button(this);             

            rowLayout.addView(m_pBtnDay[i][j], param); 

            m_pBtnDay[i][j].setOnLongClickListener(this);                           

            m_pBtnDay[i][j].setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL);
            m_pBtnDay[i][j].setTextSize(12);                                
        }
    }
    x =  m_pBtnDay[i][j].getWidth();
    y =  m_pBtnDay[i][j].getHeight();
    Log.d("width", Integer.toString(x));
    Log.d("Height", Integer.toString(y));
    return true;

解决方案

Probably you are calling getWidth() and getHeight() too early: I think the UI has not been sized and laid out on the screen yet...
You can try to put that code inside this:

@Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    // Call here getWidth() and getHeight()
 }

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