@Override
public int getViewTypeCount() {
  return 2;
}

@Override
public int getItemViewType(int position) {
  return (getItemId(position) == KEY_NINE) ? 2 : 1;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
  ViewHolder viewHolder = null;
  if (convertView == null) {
    if (getItemViewType(position) == 1) {
      //数字键
      convertView = LayoutInflater.from(context).inflate(R.layout.item_grid_keyboard, parent, false);
      viewHolder = new ViewHolder(convertView);
    } else {
      //删除键
      convertView = LayoutInflater.from(context).inflate(R.layout.item_grid_keyboard_delete, parent, false);
    }
  }

  if (getItemViewType(position) == 1) {
    viewHolder = (ViewHolder) convertView.getTag();
    viewHolder.tvKey.setText(key[position]);
  }

  return convertView;
}

/**
 * 输入密码，根据StringBuilder中数据的多少进行逻辑判断
 * @param value
 */
public void add(String value) {
  if (mPassword != null && mPassword.length() < 6) {
    mPassword.append(value);//此处先添加到StringBuilder中，再在输入框中显示
    if (mPassword.length() == 1) {
      tvFirst.setText(value);
    } else if (mPassword.length() == 2) {
      tvSecond.setText(value);
    }else if (mPassword.length() == 3) {
      tvThird.setText(value);
    }else if (mPassword.length() == 4) {
      tvForth.setText(value);
    }else if (mPassword.length() == 5) {
      tvFifth.setText(value);
    }else if (mPassword.length() == 6) {
      tvSixth.setText(value);
    }
  }
}

/**
 * 删除密码，根据StringBuilder中数据的多少进行逻辑判断
 */
public void remove() {
  if (mPassword != null && mPassword.length() > 0) {
    if (mPassword.length() == 1) {
      tvFirst.setText("");
    } else if (mPassword.length() == 2) {
      tvSecond.setText("");
    }else if (mPassword.length() == 3) {
      tvThird.setText("");
    }else if (mPassword.length() == 4) {
      tvForth.setText("");
    }else if (mPassword.length() == 5) {
      tvFifth.setText("");
    }else if (mPassword.length() == 6) {
      tvSixth.setText("");
    }
    mPassword.deleteCharAt(mPassword.length() - 1);
  }
}

/**
 * 返回完整密码
 * @return 
 */
public String getText() {
  return (mPassword == null) ? null : mPassword.toString();
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

  <com.github.phoenix.widget.PayEditText
    android:id="@+id/PayEditText_pay"
    android:layout_width="match_parent"
    android:layout_marginTop="20dp"
    android:paddingLeft="12dp"
    android:layout_alignParentTop="true"
    android:paddingRight="12dp"
    android:layout_height="48dp"/>

  <com.github.phoenix.widget.Keyboard
    android:id="@+id/KeyboardView_pay"
    android:layout_alignParentBottom="true"
    android:layout_width="match_parent"
    android:layout_height="300dp"/>

</RelativeLayout>

//键
private static final String[] KEY = new String[] {
      "1", "2", "3",
      "4", "5", "6",
      "7", "8", "9",
      "<<", "0", "完成"
  };
//设置键盘
keyboard.setKeyboardKeys(KEY);
//键盘键的点击事件
keyboard.setOnClickKeyboardListener(new Keyboard.OnClickKeyboardListener() {
  @Override
  public void onKeyClick(int position, String value) {
    if (position < 11 && position != 9) {
      payEditText.add(value);
    } else if (position == 9) {
      payEditText.remove();
    }else if (position == 11) {
      //当点击键盘上的完成按钮时，也可以通过payEditText.getText()获取密码，此时不应该注册OnInputFinishedListener接口
      Toast.makeText(getApplication(), "您的密码是：" + payEditText.getText(), Toast.LENGTH_SHORT).show();
      finish();
    }
  }
});

//当密码输入完成时的回调
payEditText.setOnInputFinishedListener(new PayEditText.OnInputFinishedListener() {
  @Override
  public void onInputFinished(String password) {
    Toast.makeText(getApplication(), "您的密码是：" + password, Toast.LENGTH_SHORT).show();
 }
});