简单页面，不一一介绍，直接上源码
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package cn.npe1348.zfbpay.view;

import android.content.Context;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

import cn.npe1348.zfbpay.R;

public class PasswordView extends RelativeLayout {
private Context context;
// 输入的密码
private String strPassword;
// 就6个输入框不会变了，用数组内存申请固定空间，比List省空间
private TextView[]textViewList;
// 用GrideView布局键盘，其实并不是真正的键盘，只是模拟键盘的功能
private GridView gridView;
// 要用Adapter中适配，用数组不能往adapter中填充
private ArrayList> valueList;
//取消按钮
private ImageView tvCancel;
//忘记密码按钮
private TextView tvForget;
// 用于记录当前输入密码格位置
private int currentIndex = -1;

//自定义接口public interface OnPasswordInputFinish {    //添加密码输入完成的接口    void inputFinish();    //取消支付接口    void outfo();    //忘记密码接口    void forgetPwd();}public PasswordView(Context context, AttributeSet attrs) {    this(context, attrs,0);}public PasswordView(Context context, AttributeSet attrs, int defStyleAttr) {    super(context, attrs, defStyleAttr);    this.context = context;    //view布局    View view = View.inflate(context, R.layout.layout_popup_bottom, null);    valueList = new ArrayList>();    textViewList = new TextView[6];    //初始化控件    tvCancel=(ImageView) view.findViewById(R.id.tvCancel);    tvForget = (TextView) view.findViewById(R.id.tv_forgetPwd);    textViewList[0] = (TextView) view.findViewById(R.id.tv_pass1);    textViewList[1] = (TextView) view.findViewById(R.id.tv_pass2);    textViewList[2] = (TextView) view.findViewById(R.id.tv_pass3);    textViewList[3] = (TextView) view.findViewById(R.id.tv_pass4);    textViewList[4] = (TextView) view.findViewById(R.id.tv_pass5);    textViewList[5] = (TextView) view.findViewById(R.id.tv_pass6);    //初始化键盘    gridView = (GridView) view.findViewById(R.id.gv_keybord);    //设置键盘显示按钮到集合    setView();    // 必须要，不然不显示控件    addView(view);}//设置按钮显示内容private void setView() {    // 初始化按钮上应该显示的数字    for (int i = 1; i < 13; i++) {        Map map = new HashMap();        if (i < 10) {            map.put("name", String.valueOf(i));        } else if (i == 10) {            map.put("name", "X");        } else if (i == 12) {            map.put("name", "<");        } else if (i == 11) {            map.put("name", String.valueOf(0));        }        valueList.add(map);    }    //为键盘gridview设置适配器    gridView.setAdapter(adapter);    //为键盘按键添加点击事件    gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {        @Override        public void onItemClick(AdapterView<?> parent, View view,                                int position, long id) {            // 点击0~9按钮            if (position < 11 && position != 9) {                // 判断输入位置————要小心数组越界                if (currentIndex >= -1 && currentIndex < 5) {                    textViewList[++currentIndex].setText(valueList.get(position)                            .get("name"));                }            } else {                // 点击退格键                if (position == 11) {                    // 判断是否删除完毕————要小心数组越界                    if (currentIndex - 1 >= -1) {                        textViewList[currentIndex--].setText("");                    }                }else if(position == 9){                    currentIndex = -1;                    for(int i = 0,length=textViewList.length;i