/** 
 * 
 * 自定义一个4*3的拨打电话的布局控件, 
 * 
 * 
 */ 
public class MyPhoneCard extends ViewGroup{ 
   
  private static final int COLUMNS = 3; 
  private static final int ROWS = 4; 
  private static final int NUM_BUTTON = COLUMNS*ROWS; 
   
  private View[] mButtons = new View[NUM_BUTTON]; 
   
  private int mButtonWidth; 
  private int mButtonHeight; 
  private int mPaddingLeft; 
  private int mPaddingRight; 
  private int mPaddingTop; 
  private int mPaddingBottom; 
  private int mWidthInc; 
  private int mHeightInc; 
  private int mWidth; 
  private int mHeight; 
 
  public MyPhoneCard(Context context) { 
    super(context); 
  } 
   
  public MyPhoneCard(Context context, AttributeSet attrs){ 
    super(context,attrs); 
  } 
   
  public MyPhoneCard(Context context, AttributeSet attrs, int defStyle){ 
    super(context,attrs,defStyle); 
  } 
   
  /** 
   * 当从xml将所有的控件都调入内存后，触发的动作 
   * 在这里获取控件的大小，并计算整个ViewGroup需要的总的宽和高 
   */ 
  @Override 
  protected void onFinishInflate(){ 
    super.onFinishInflate(); 
    final View[] btns = mButtons; 
     
    for(int i=0; i

<?xml version="1.0" encoding="utf-8"?>