public class PasswordTextView extends TextView{
 private final String sing = "*";//密文顯示的內(nèi)容
 private String content = "";//顯示的內(nèi)容
 //文本改變事件回調(diào)接口
 private OnTextChangedListener onTextChangedListener;
 /**
  * Handler線程對(duì)象,用來更新密碼框的顯示內(nèi)容
  * 實(shí)現(xiàn)將輸入的內(nèi)容顯示為密文
  */
 private Handler handler = new Handler(){
  public void handleMessage(android.os.Message msg) {
   //密文顯示
   PasswordTextView.this.setText(sing);
   //回調(diào)改變事件接口
   if(onTextChangedListener != null){
    onTextChangedListener.textChanged(content);
   }
  };
 };

 /**
  * 構(gòu)造方法
  * @param context
  * @param attrs
  */
 public PasswordTextView(Context context, AttributeSet attrs) {
  super(context, attrs);
 }

 /**
  * 設(shè)置文本改變事件監(jiān)聽
  * @param onTextChangedListener
  */
 public void setOnTextChangedListener(OnTextChangedListener onTextChangedListener){
  this.onTextChangedListener = onTextChangedListener;
 }

 /**
  * 設(shè)置密碼框顯示的內(nèi)容
  * @param text
  */
 public void setTextContent(String text){
  //獲得輸入的內(nèi)容
  this.content = text;
  if(!TextUtils.isEmpty(text)){
   handler.sendEmptyMessage(0);//向Handler發(fā)送消息
  }else{
   this.setText("");
  }
 }

 /**
  * 獲取顯示的內(nèi)容
  * @return
  */
 public String getTextContent(){
  return content;
 }

 /**
  * 文本改變事件接口
  */
 public interface OnTextChangedListener{
  /**
   * 密碼框文本改變時(shí)調(diào)用
   * @param content
   */
  public void textChanged(String content);
 }
}

public class NumericK eyboard extends View {
 private int screen_width = 0;// 屏幕的寬度
 private float first_x = 0;// 繪制1的x坐標(biāo)
 private float first_y = 0;// 繪制1的y坐標(biāo)
 private float[] xs = new float[3];//聲明數(shù)組保存每一列的圓心橫坐標(biāo)
 private float[] ys = new float[4];//聲明數(shù)組保存每一排的圓心縱坐標(biāo)
 private float circle_x, circle_y;//點(diǎn)擊處的圓心坐標(biāo)
 private int number = -1;//點(diǎn)擊的數(shù)字
 private OnNumberClick onNumberClick;//數(shù)字點(diǎn)擊事件
 /*
  * 判斷刷新數(shù)據(jù)
  * -1 不進(jìn)行數(shù)據(jù)刷新
  * 0 按下刷新
  * 1 彈起刷新
  */
 private int type = -1;

 /**
  * 構(gòu)造方法
  *
  * @param context
  */
 public NumericKeyboard(Context context) {
  super(context);
  initData(context);// 初始化數(shù)據(jù)
 }

 public NumericKeyboard(Context context, AttributeSet attrs) {
  super(context, attrs);
  initData(context);// 初始化數(shù)據(jù)
 }

 /**
  * 設(shè)置數(shù)字點(diǎn)擊事件
  *
  * @param onNumberClick
  */
 public void setOnNumberClick(OnNumberClick onNumberClick) {
  this.onNumberClick = onNumberClick;
 }

 // 初始化數(shù)據(jù)
 private void initData(Context context) {
  // 獲取屏幕的寬度
  screen_width = SystemUtils.getSystemDisplay(context)[0];
  // 獲取繪制1的x坐標(biāo)
  first_x = screen_width / 4;
  // 獲取繪制1的y坐標(biāo)
  first_y = (SystemUtils.getSystemDisplay(context)[1] - SystemUtils.getSystemDisplay(context)[1] / 3) / 4;
  //添加每一排的橫坐標(biāo)
  xs[0] = first_x + 10;
  xs[1] = first_x * 2 + 10;
  xs[2] = first_x * 3 + 10;
  //添加每一列的縱坐標(biāo)
  ys[0] = 40 + first_y - 15;
  ys[1] = 40 + first_y + first_x - 15;
  ys[2] = 40 + first_y + first_x * 2 - 15;
  ys[3] = 40 + first_y + first_x * 3 - 15;
 }

 @Override
 protected void onDraw(Canvas canvas) {
  super.onDraw(canvas);
  // 創(chuàng)建畫筆對(duì)象
  Paint paint = new Paint();
  paint.setColor(Color.BLACK);// 設(shè)置畫筆顏色
  paint.setTextSize(40);// 設(shè)置字體大小
  paint.setStrokeWidth(2);
  // 繪制文本,注意是從坐標(biāo)開始往上繪制
  // 這里較難的就是算坐標(biāo)
  // 繪制第一排1,2,3
  canvas.drawText("1", first_x, 40 + first_y, paint);
  canvas.drawText("2", first_x * 2, 40 + first_y, paint);
  canvas.drawText("3", first_x * 3, 40 + first_y, paint);
  // 繪制第2排4,5,6
  canvas.drawText("4", first_x, 40 + first_y + first_x, paint);
  canvas.drawText("5", first_x * 2, 40 + first_y + first_x, paint);
  canvas.drawText("6", first_x * 3, 40 + first_y + first_x, paint);
  // 繪制第3排7,8,9
  canvas.drawText("7", first_x, 40 + first_y + first_x * 2, paint);
  canvas.drawText("8", first_x * 2, 40 + first_y + first_x * 2, paint);
  canvas.drawText("9", first_x * 3, 40 + first_y + first_x * 2, paint);
  // 繪制第4排0
  canvas.drawText("0", first_x * 2, 40 + first_y + first_x * 3, paint);
  //為每一個(gè)數(shù)字繪制一個(gè)圓
  paint.setColor(Color.WHITE);//設(shè)置畫筆顏色
  paint.setAntiAlias(true);//設(shè)置抗鋸齒
  //設(shè)置繪制空心圓
  paint.setStyle(Paint.Style.STROKE);
  //依次繪制第一排的圓
  canvas.drawCircle(first_x + 10, 40 + first_y - 15, 70, paint);
  canvas.drawCircle(first_x * 2 + 10, 40 + first_y - 15, 70, paint);
  canvas.drawCircle(first_x * 3 + 10, 40 + first_y - 15, 70, paint);
  //依次繪制第2排的圓
  canvas.drawCircle(first_x + 10, 40 + first_y + first_x - 15, 70, paint);
  canvas.drawCircle(first_x * 2 + 10, 40 + first_y + first_x - 15, 70, paint);
  canvas.drawCircle(first_x * 3 + 10, 40 + first_y + first_x - 15, 70, paint);
  //依次繪制第3排的圓
  canvas.drawCircle(first_x + 10, 40 + first_y + first_x * 2 - 15, 70, paint);
  canvas.drawCircle(first_x * 2 + 10, 40 + first_y + first_x * 2 - 15, 70, paint);
  canvas.drawCircle(first_x * 3 + 10, 40 + first_y + first_x * 2 - 15, 70, paint);
  //繪制最后一個(gè)圓
  canvas.drawCircle(first_x * 2 + 10, 40 + first_y + first_x * 3 - 15, 70, paint);

  //判斷是否點(diǎn)擊數(shù)字(點(diǎn)擊數(shù)字產(chǎn)生的漸變效果)
  if (circle_x > 0 && circle_y > 0) {
   if (type == 0) {//按下刷新
    paint.setColor(Color.WHITE);//設(shè)置畫筆顏色
    paint.setStyle(Paint.Style.FILL_AND_STROKE);//按下的時(shí)候繪制實(shí)心圓
    canvas.drawCircle(circle_x, circle_y, 70, paint);//繪制圓
   } else if (type == 1) {//彈起刷新
    paint.setColor(Color.WHITE);//設(shè)置畫筆顏色
    paint.setStyle(Paint.Style.STROKE);//彈起的時(shí)候再繪制空心圓
    canvas.drawCircle(circle_x, circle_y, 70, paint);//繪制圓
    //繪制完成后,重置
    circle_x = 0;
    circle_y = 0;
   }
  }
 }

 /**
  * 獲取觸摸點(diǎn)擊事件
  */
 @Override
 public boolean onTouchEvent(MotionEvent event) {
  //事件判斷
  switch (event.getAction()) {
   case MotionEvent.ACTION_DOWN://按下
    //判斷點(diǎn)擊的坐標(biāo)位置
    float x = event.getX();//按下時(shí)的X坐標(biāo)
    float y = event.getY();//按下時(shí)的Y坐標(biāo)
    //判斷點(diǎn)擊的是哪一個(gè)數(shù)字圓
    handleDown(x, y);
    return true;
   case MotionEvent.ACTION_UP://彈起
    type = 1;//彈起刷新
    invalidate();//刷新界面
    //返回點(diǎn)擊的數(shù)字
    if (onNumberClick != null && number != -1) {
     onNumberClick.onNumberReturn(number);
    }
    setDefault();//恢復(fù)默認(rèn)
    //發(fā)送輔助事件
    sendAccessEvent(R.string.numeric_keyboard_up);
    return true;
   case MotionEvent.ACTION_CANCEL://取消
    //恢復(fù)默認(rèn)值
    setDefault();
    return true;
  }
  return false;
 }

 /*
  * 恢復(fù)默認(rèn)值
  */
 private void setDefault() {
  circle_x = 0;
  circle_y = 0;
  type = -1;
  number = -1;
  sendAccessEvent(R.string.numeric_keyboard_cancel);
 }

 /*
  * 設(shè)置輔助功能描述
  */
 private void sendAccessEvent(int resId) {
  //設(shè)置描述
  setContentDescription(getContext().getString(resId));
  //發(fā)送輔助事件
  sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SELECTED);
  setContentDescription(null);
 }

 /*
  * 判斷點(diǎn)擊的是哪一個(gè)數(shù)字圓
  */
 private void handleDown(float x, float y) {
  //判斷點(diǎn)擊的是那一列的數(shù)據(jù)
  if (xs[0] - 70 <= x && x <= xs[0] + 70) {//第一列
   //獲取點(diǎn)擊處的圓心橫坐標(biāo)
   circle_x = xs[0];
   //判斷點(diǎn)擊的是哪一排
   if (ys[0] - 70 <= y && ys[0] + 70 >= y) {//第1排
    //獲取點(diǎn)擊的數(shù)字圓的圓心縱坐標(biāo)
    circle_y = ys[0];
    number = 1;//設(shè)置點(diǎn)擊的數(shù)字
   } else if (ys[1] - 70 <= y && ys[1] + 70 >= y) {//第2排
    //獲取點(diǎn)擊的數(shù)字圓的圓心縱坐標(biāo)
    circle_y = ys[1];
    number = 4;//設(shè)置點(diǎn)擊的數(shù)字
   } else if (ys[2] - 70 <= y && ys[2] + 70 >= y) {//第3排
    //獲取點(diǎn)擊的數(shù)字圓的圓心縱坐標(biāo)
    circle_y = ys[2];
    number = 7;//設(shè)置點(diǎn)擊的數(shù)字
   }
  } else if (xs[1] - 70 <= x && x <= xs[1] + 70) {//第2列
   //獲取點(diǎn)擊處的圓心橫坐標(biāo)
   circle_x = xs[1];
   //判斷點(diǎn)擊的是哪一排
   if (ys[0] - 70 <= y && ys[0] + 70 >= y) {//第1排
    //獲取點(diǎn)擊的數(shù)字圓的圓心縱坐標(biāo)
    circle_y = ys[0];
    number = 2;//設(shè)置點(diǎn)擊的數(shù)字
   } else if (ys[1] - 70 <= y && ys[1] + 70 >= y) {//第2排
    //獲取點(diǎn)擊的數(shù)字圓的圓心縱坐標(biāo)
    circle_y = ys[1];
    number = 5;//設(shè)置點(diǎn)擊的數(shù)字
   } else if (ys[2] - 70 <= y && ys[2] + 70 >= y) {//第3排
    //獲取點(diǎn)擊的數(shù)字圓的圓心縱坐標(biāo)
    circle_y = ys[2];
    number = 8;//設(shè)置點(diǎn)擊的數(shù)字
   } else if (ys[3] - 70 <= y && ys[3] + 70 >= y) {//第4排
    //獲取點(diǎn)擊的數(shù)字圓的圓心縱坐標(biāo)
    circle_y = ys[3];
    number = 0;//設(shè)置點(diǎn)擊的數(shù)字
   }
  } else if (xs[2] - 70 <= x && x <= xs[2] + 70) {//第3列
   //獲取點(diǎn)擊處的圓心橫坐標(biāo)
   circle_x = xs[2];
   //判斷點(diǎn)擊的是哪一排
   if (ys[0] - 70 <= y && ys[0] + 70 >= y) {//第1排
    //獲取點(diǎn)擊的數(shù)字圓的圓心縱坐標(biāo)
    circle_y = ys[0];
    number = 3;//設(shè)置點(diǎn)擊的數(shù)字
   } else if (ys[1] - 70 <= y && ys[1] + 70 >= y) {//第2排
    //獲取點(diǎn)擊的數(shù)字圓的圓心縱坐標(biāo)
    circle_y = ys[1];
    number = 6;//設(shè)置點(diǎn)擊的數(shù)字
   } else if (ys[2] - 70 <= y && ys[2] + 70 >= y) {//第3排
    //獲取點(diǎn)擊的數(shù)字圓的圓心縱坐標(biāo)
    circle_y = ys[2];
    number = 9;//設(shè)置點(diǎn)擊的數(shù)字
   }
  }
  sendAccessEvent(R.string.numeric_keyboard_down);
  type = 0;//按下刷新
  //繪制點(diǎn)擊時(shí)的背景圓
  invalidate();
 }

 /**
  * 數(shù)字點(diǎn)擊事件
  */
 public interface OnNumberClick {
  /**
   * 返回點(diǎn)擊的數(shù)字
   *
   * @param number
   */
  public void onNumberReturn(int number);
 }
}