package demo.apk;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class GridView9Activity extends Activity {
    String[] arrAppName = new String[] { "系统清理", "手机杀毒", "流量监控", "隐私空间",
            "短信拦截", "防盗备份", "快速拨号", "工具箱", "设置" };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        GridView gridview = (GridView) findViewById(R.id.grd);

        // 生成动态数组，并且转入数据
        ArrayList<HashMap<String, Object>> lstImageItem = new ArrayList<HashMap<String, Object>>();
        for (int i = 0; i < 9; i++) {
            HashMap<String, Object> map = new HashMap<String, Object>();
            map.put("ItemImage", R.drawable.app91 + i);// 添加图像资源的ID
            map.put("ItemText", arrAppName[i]);// 按序号做ItemText
            lstImageItem.add(map);
        }
        SimpleAdapter saImageItems = new SimpleAdapter(this, lstImageItem,// 数据来源
                R.layout.gitem,// 一个定义列表项目的视图布局的资源唯一标识。布局文件将至少应包含哪些在to中定义了的名称。
                // 一个将被添加到Map上关联每一个项目的列名称的列表
                new String[] { "ItemImage", "ItemText" },
                // 应该在参数from显示列的视图。这些应该全是TextView。在列表中最初的N视图是从参数from中最初的N列获取的值。
                new int[] { R.id.ItemImage, R.id.ItemText });
        // 添加并且显示
        gridview.setAdapter(saImageItems);
        // 添加消息处理
        gridview.setOnItemClickListener(new ItemClickListener());
    }

    // 当AdapterView被单击(触摸屏或者键盘)，则返回的Item单击事件
    class ItemClickListener implements OnItemClickListener {
        public void onItemClick(AdapterView<?> arg0,// The AdapterView where the
                // click happened
                View arg1,// The view within the AdapterView that was clicked
                int arg2,// The position of the view in the adapter
                long arg3// The row id of the item that was clicked
        ) {
            // 在本例中arg2=arg3
            HashMap<String, Object> item = (HashMap<String, Object>) arg0
                    .getItemAtPosition(arg2);
            String str = (String) item.get("ItemText");
            if (str.equals("快速拨号")) {
                Intent intent = new Intent("android.intent.action.CALL_BUTTON");
                startActivity(intent);
            }
            else {
                Intent inte=new Intent();
                inte.setClass(GridView9Activity.this, EActivity.class);
                startActivity(inte);
                //GridView9Activity.this.finish();
            }
        }

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        // 显示指定菜单项的组号、ID、排序号、标题
        menu.add(R.id.about, // 组号
                1, // 唯一的ID号
                1, // 排序号
                "关于"); // 标题
        menu.add(R.id.exit,// 组号
                2, // 唯一的ID号
                2, // 排序号
                "退出"); // 标题
        // 返回true显示菜单,如果返回的是false将不会显示菜单
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        // 响应每个菜单项(通过菜单项的ID)
        case 1:
            // 关于

            break;
        case 2:
            // 退出
            new AlertDialog.Builder(GridView9Activity.this)
                    .setMessage("确定退出吗？").setNegativeButton("否",
                            new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog,
                                        int which) {
                                }
                            }).setPositiveButton("是",
                            new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface arg0,
                                        int arg1) {
                                    System.exit(0);

                                }
                            }).show();
            break;

        default:
            return super.onOptionsItemSelected(item);
        }
        // 返回true表示处理完菜单项的事件，不需要将该事件继续传播下去了
        return true;
    }

    private static Boolean isExit = false;
    private static Boolean hasTask = false;
    Timer tExit = new Timer();
    TimerTask task = new TimerTask() {

        @Override
        public void run() {
            isExit = false;
            hasTask = true;
        }
    };

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // 如果按下的是返回键
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            if (isExit == false) {
                isExit = true;
                // 输出一条提示在屏幕上
                Toast.makeText(this, "再按一次后退键退出应用程序", Toast.LENGTH_SHORT)
                        .show();
                if (!hasTask) {
                    tExit.schedule(task, 2000);
                }
            } else {
                // 对Activity执行消亡操作
                finish();
                // System.exit(0);
            }
        }
        // 这里需要返回false,否则所有按键将会失效
        return false;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" android:layout_height="fill_parent"
    android:orientation="vertical" android:weightSum="1" 
    >
    <TextView android:id="@+id/textView1" android:layout_height="60dp"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="仿360手机卫士九宫图" android:layout_width="fill_parent"
        android:gravity="center" >
        </TextView>

    <GridView android:id="@+id/grd" android:layout_width="fill_parent"
        android:numColumns="auto_fit" android:verticalSpacing="10dp"
        android:horizontalSpacing="10dp" android:columnWidth="90dp"
        android:stretchMode="columnWidth" android:gravity="center"
        android:layout_height="wrap_content"></GridView>


</LinearLayout>