142.s1-看门狗实现程序锁密码_eatch dog 做加密-优快云博客

本文链接：https://blog.youkuaiyun.com/augfun/article/details/70836194

程序锁需要实时监听应用程序，利用看门狗服务实现。首先获取到所有的任务栈，任务栈最上面的就是刚刚点击的应用，然后便利程序锁数据库，看在不在程序锁数据库中，在程序锁数据库中，就直接跳转到输入密码的界面，由于EditText会获取到焦点，点击的时候会获取到系统的键盘，需要先隐藏系统的键盘et_pwd.setInputType(InputType.TYPE_NULL);

服务不能直接跳activity,需要设置标记

//服务网activity跳转需要设置flag
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

获取任务栈需要权限

<uses-permission android:name="android.permission.GET_TASKS"></uses-permission>

注册看门狗的服务

<service android:name="com.ldw.safe.service.WatchDogService"></service>

设置密码的界面activity_set_pwd.xml

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

    <TextView 
        style="@style/TitleStyle"
        android:text="请输入隐私密码"
        />
    <ImageView 
        android:layout_width="wrap_content"
    	android:layout_height="wrap_content"
    	android:src="@drawable/icon_lock_big"
    	android:layout_marginTop="20dp"
    	android:layout_gravity="center_horizontal"
        />
    <RelativeLayout 
        android:layout_width="match_parent"
    	android:layout_height="wrap_content"
        >
    <EditText 
        android:id="@+id/et_pwd"
        android:layout_width="match_parent"
    	android:layout_height="wrap_content"
    	android:layout_marginLeft="10dp"
    	android:layout_marginRight="10dp"
    	android:layout_marginTop="20dp"
        />
    <Button 
        android:id="@+id/bt_ok"
        android:layout_width="wrap_content"
    	android:layout_height="wrap_content"
    	android:text="确定"
    	android:layout_alignParentRight="true"
    	android:layout_marginRight="10dp"
    	android:background="@drawable/desktop_button_1"
        />
    </RelativeLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="bottom"
        android:orientation="vertical" 
        android:background="#22000000">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >

            <Button
                android:id="@+id/bt_1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="1" />

            <Button
                android:id="@+id/bt_2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="2" />

            <Button
                android:id="@+id/bt_3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="3" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >

            <Button
                android:id="@+id/bt_4"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="4" />

            <Button
                android:id="@+id/bt_5"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="5" />

            <Button
                android:id="@+id/bt_6"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="6" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >

            <Button
                android:id="@+id/bt_7"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="7" />

            <Button
                android:id="@+id/bt_8"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="8" />

            <Button
                android:id="@+id/bt_9"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="9" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >

            <Button
                android:id="@+id/bt_clean_all"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="清空" />

            <Button
                android:id="@+id/bt_0"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="0" />

            <Button
                android:id="@+id/bt_delete"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="删除" />
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

看门狗服务开启的界面activity_setting.xml

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

    <TextView 
		style="@style/TitleStyle"
    	android:text="手机设置"
        />
    <com.ldw.safe.view.SettingItemView
        android:id="@+id/siv_update"
        android:layout_width="match_parent"
    	android:layout_height="wrap_content"
    	ldw:title="自动更新设置"
    	ldw:desc_on="自动更新已开启"
    	ldw:desc_off="自动更新已关闭"
        />
    <com.ldw.safe.view.SettingItemView
        android:id="@+id/siv_address"
        android:layout_width="match_parent"
    	android:layout_height="wrap_content"
    	ldw:title="电话归属地显示设置"
    	ldw:desc_on="电话归属地显示已开启"
    	ldw:desc_off="电话归属地显示已关闭"
        />
    <com.ldw.safe.view.SettingClickView
        android:id="@+id/scv_address_style"
        android:layout_width="match_parent"
    	android:layout_height="wrap_content"
        />
    <com.ldw.safe.view.SettingClickView
        android:id="@+id/scv_address_location"
        android:layout_width="match_parent"
    	android:layout_height="wrap_content"
        />
    <com.ldw.safe.view.SettingItemView
        android:id="@+id/siv_callsafe"
        android:layout_width="match_parent"
    	android:layout_height="wrap_content"
    	ldw:title="黑名单更新设置"
    	ldw:desc_on="黑名单更新已开启"
    	ldw:desc_off="黑名单更新已关闭"
        />
    <com.ldw.safe.view.SettingItemView
        android:id="@+id/siv_watch_dog"
        android:layout_width="match_parent"
    	android:layout_height="wrap_content"
    	ldw:title="看门狗设置"
    	ldw:desc_on="看门狗已经打开"
    	ldw:desc_off="看门狗已经关闭"
        />
</LinearLayout>

看门狗服务的初始化逻辑文件SettingActivity.java

package com.ldw.safe.Activity;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;

import com.ldw.safe.R;
import com.ldw.safe.service.AddressService;
import com.ldw.safe.service.CallSafeService;
import com.ldw.safe.service.WatchDogService;
import com.ldw.safe.utils.ServiceStatusUtils;
import com.ldw.safe.view.SettingClickView;
import com.ldw.safe.view.SettingItemView;

/**
 * 设置中心
 */
public class SettingActivity extends Activity {

	private SettingItemView siv_update;//设置自动更新
	private SettingItemView siv_address;//归属地
	private SettingClickView scv_address_style;//归属地显示的风格
	private SettingClickView scv_address_location;//初始化归属地的位置
	private SettingItemView siv_callsafe;//黑名单
	private SettingItemView siv_watch_dog;//看门狗
	
	private SharedPreferences mPref;//把设置的数据保存在mPref
	
	@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_setting);
        
        //把设置的数据保存在mPref
        mPref = getSharedPreferences("config", MODE_PRIVATE);
               
        initUpdateView();//初始化自动升级开关
        initAdressView();//初始化归属地开关
        initAddressStyle();//初始化归属地样式的选择
        initAddressLocation();//初始化归属地出现的位置
        initBlackView();//黑名单设置开关
        initWatchDog();
	}
	
	/*
	 * 看门狗设置初始化
	 */
	private void initWatchDog() {
		siv_watch_dog = (SettingItemView) findViewById(R.id.siv_watch_dog);

        // 根据归属地服务是否运行来更新checkbox
        boolean serviceRunning = ServiceStatusUtils.isServiceRunning(this,
                "com.ldw.safe.service.WatchDogService");

        if (serviceRunning) {
        	siv_watch_dog.setChecked(true);
        } else {
        	siv_watch_dog.setChecked(false);
        }

        siv_watch_dog.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                if (siv_watch_dog.isChecked()) {
                	siv_watch_dog.setChecked(false);
                    stopService(new Intent(SettingActivity.this,
                    		WatchDogService.class));// 停止归属地服务
                } else {
                	siv_watch_dog.setChecked(true);
                    startService(new Intent(SettingActivity.this,
                    		WatchDogService.class));// 开启归属地服务
                }
            }
        });
		
	}
	
	/*
	 * 黑名单设置初始化
	 */
	private void initBlackView() {
		siv_callsafe = (SettingItemView) findViewById(R.id.siv_callsafe);

        // 根据归属地服务是否运行来更新checkbox
        boolean serviceRunning = ServiceStatusUtils.isServiceRunning(this,
                "com.ldw.safe.service.CallSafeService");

        if (serviceRunning) {
            siv_callsafe.setChecked(true);
        } else {
            siv_callsafe.setChecked(false);
        }

        siv_callsafe.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                if (siv_callsafe.isChecked()) {
                    siv_callsafe.setChecked(false);
                    stopService(new Intent(SettingActivity.this,
                            CallSafeService.class));// 停止归属地服务
                } else {
                    siv_callsafe.setChecked(true);
                    startService(new Intent(SettingActivity.this,
                            CallSafeService.class));// 开启归属地服务
                }
            }
        });
		
	}

	/*
	 * 初始化自动升级开关
	 */
	private void initUpdateView(){
		siv_update = (SettingItemView)findViewById(R.id.siv_update);
        //siv_update.setTitle("自动更新设置");
        
        //获取保存的数据，判断之前选择的是开始还是关闭,初始化进入界面是否勾选
        boolean autoUpdate = mPref.getBoolean("auto_update", true);
        if(autoUpdate){
        	siv_update.setDesc("自动更新已经开启");
        	siv_update.setChecked(true);
        }else{
        	siv_update.setDesc("自动更新已经关闭");
        	siv_update.setChecked(false);
        }
        
        siv_update.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				//判断右边框的勾选状态
				if(siv_update.isChecked()){
					//设置不勾选
					siv_update.setChecked(false);
					//siv_update.setDesc("自动更新已经关闭");
					//编辑mPref的值
					mPref.edit().putBoolean("auto_update", false).commit();
				}else{
					//设置勾选
					siv_update.setChecked(true);
					//siv_update.setDesc("自动更新已经开启");
					//编辑mPref的值
					mPref.edit().putBoolean("auto_update", true).commit();
				}
			}
        	
        });
	}
	
	/*
	 * 初始化归属地开关
	 */
	private void initAdressView(){
		
		siv_address = (SettingItemView) findViewById(R.id.siv_address);
		//判断归属地的服务是否在运行
		boolean serviceRunning = ServiceStatusUtils.isServiceRunning(this, "com.ldw.safe.service.AddressService");
		//让服务的那个勾选框根据系统中是否有服务来判断是否去开启
		if(serviceRunning){
			siv_address.setChecked(true);
		}else{
			siv_address.setChecked(false);
		}
		
		siv_address.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				if(siv_address.isChecked()){
					siv_address.setChecked(false);
					stopService(new Intent(SettingActivity.this, AddressService.class));
				}else{
					siv_address.setChecked(true);
					//号码归属地显示开启的时候要开启服务
					startService(new Intent(SettingActivity.this, AddressService.class));
				}
				
			}
			
		});
	}
	
	/*
	 * 修改号码归属地提示框的风格
	 */
	private void initAddressStyle(){
		scv_address_style = (SettingClickView) findViewById(R.id.scv_address_style);
		
		scv_address_style.setTitle("归属地提示框风格");
		//获取保存的样式
		int style = mPref.getInt("address_Style", 0);
		//设置样式
		scv_address_style.setDesc(items[style]);
		
		scv_address_style.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				showSingleChooseDialog();
			}
			
		});
	}
	
	final String[] items = new String[]{"半透明", "活力橙", "卫士蓝", "金属灰", "苹果绿"};
	
	/*
	 * 弹出归属地样式选择的单选框
	 */
	public void showSingleChooseDialog(){
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		//设置选择框额logo
		builder.setIcon(R.drawable.ic_launcher);
		builder.setTitle("归属地提示框风格");
		//获取保存的风格样式，默认为0
		int style = mPref.getInt("address_Style", 0);
		
		
		builder.setSingleChoiceItems(items, style, 
				new DialogInterface.OnClickListener(){

			@Override
			public void onClick(DialogInterface dialog, int which) {
				//保存选择的样式的序号
				mPref.edit().putInt("address_Style", which).commit();
				//点击以后对话框消失
				dialog.dismiss();
				//设置组合控件的文字描述
				scv_address_style.setDesc(items[which]);
				
			}
			
		});
		builder.setNegativeButton("取消", null);
		builder.show();
	}
	
	/*
	 * 初始化归属地出现的位置
	 */
	private void initAddressLocation(){
		scv_address_location = (SettingClickView) findViewById(R.id.scv_address_location);
		
		scv_address_location.setTitle("归属地提示框的显示位置");
		scv_address_location.setDesc("设置归属地提示框的显示位置");
		
		scv_address_location.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				//点击以后直接跳转页面
				startActivity(new Intent(SettingActivity.this, DragViewActivity.class));
			}
			
		});
	}

}

看门狗的服务，同时注册广播，根据屏幕的开启和关闭来启动和关闭看门狗WatchDogReceiver.java

package com.ldw.safe.service;

import java.util.List;

import android.app.ActivityManager;
import android.app.ActivityManager.RunningTaskInfo;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.IBinder;
import android.os.SystemClock;

import com.ldw.safe.Activity.EnterPwdActivity;
import com.ldw.safe.db.dao.AppLockDao;

public class WatchDogService extends Service {

	private ActivityManager activityManager;
	private AppLockDao dao;
	private List<String> appLockInfos;
	//临时停止保护的包名
	private String tempStopProtectPackageName;

	@Override
	public IBinder onBind(Intent intent) {
		// TODO Auto-generated method stub
		return null;
	}
	
private class WatchDogReceiver extends BroadcastReceiver{

		@Override
		public void onReceive(Context context, Intent intent) {
			
			if(intent.getAction().equals("com.ldw.safe.stopprotect")){
				//获取到停止保护的对象
				
				tempStopProtectPackageName = intent.getStringExtra("packageName");
			}else if(intent.getAction().equals(Intent.ACTION_SCREEN_OFF)){
				tempStopProtectPackageName = null;
				// 让看门狗休息
				flag = false;
			}else if(intent.getAction().equals(Intent.ACTION_SCREEN_ON)){
				//让看门狗继续干活
				if(flag == false){
					startWatchDog();
				}
			}
			
			
		}
		
	}
	
	@Override
	public void onCreate(){
		super.onCreate();
		
		dao = new AppLockDao(this);
		
		appLockInfos = dao.findAll();
		
		receiver = new WatchDogReceiver();
		IntentFilter filter = new IntentFilter();
		//停止保护
		filter.addAction("com.ldw.safe.stopprotect");
		//注册一个锁屏的广播，当锁屏的时候看门狗关闭
		//屏幕解锁的时候看门狗打开
		filter.addAction(Intent.ACTION_SCREEN_OFF);
		filter.addAction(Intent.ACTION_SCREEN_ON);
		//注册广播
		registerReceiver(receiver, filter);
		
				
		//获取到进程管理器
		activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
		//首先获取到当前的任务栈
		//知道任务栈最上面的任务（刚刚点击操作的任务栈）
		startWatchDog();
	}
	
	//标记当前看门狗的状态，默认false
	private boolean flag = false;
	private WatchDogReceiver receiver;
	
	private void startWatchDog() {
		//由于看门狗一直在后台运行，子线程中操作，防止阻塞主线程
		new Thread(){
			public void run(){
				flag = true;
				//一直在后台运行
				while (flag) {
					//由于这个狗一直在后台运行。为了避免程序阻塞。
					//获取到当前正在运行的任务栈
					List<RunningTaskInfo> tasks = activityManager.getRunningTasks(1);
					//获取到最上面的进程
					RunningTaskInfo taskInfo = tasks.get(0);
					//获取到最顶端应用程序的包名
					String packageName = taskInfo.topActivity.getPackageName();
					
					System.out.println(packageName);
					//让狗休息一会
					SystemClock.sleep(30);
					//直接从数据库里面查找当前的数据
					//这个可以优化。改成从内存当中寻找
					if(appLockInfos.contains(packageName)){
//					if(dao.find(packageName)){
//						System.out.println("在程序锁数据库里面");
						
						//说明需要临时取消保护
						//是因为用户输入了正确的密码
						if(packageName.equals(tempStopProtectPackageName)){
							
						}else{
							Intent intent = new Intent(WatchDogService.this,EnterPwdActivity.class);
							/**
							 * 需要注意：如果是在服务里面往activity界面跳的话。需要设置flag
							 */
							intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
							//停止保护的对象
							intent.putExtra("packageName", packageName);
							
							startActivity(intent);
						}
					}
				}

			};
		}.start();
		
	}

	@Override
	public void onDestroy(){
		super.onDestroy();
		flag = false;
		unregisterReceiver(receiver);
		receiver = null;
	}

}

密码输入的逻辑文件EnterPwdActivity.java

package com.ldw.safe.Activity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.InputType;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

import com.ldw.safe.R;
import com.ldw.safe.utils.UIUtils;

public class EnterPwdActivity extends Activity implements OnClickListener {
	
	private EditText et_pwd;
	private Button bt_0;
	private Button bt_1;
	private Button bt_2;
	private Button bt_3;
	private Button bt_4;
	private Button bt_5;
	private Button bt_6;
	private Button bt_7;
	private Button bt_8;
	private Button bt_9;
	private Button bt_clean_all;
	private Button bt_delete;
	private Button bt_ok;
	private String packageName;

	@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_set_pwd);
        
        initUi();
	}

	private void initUi() {
		et_pwd = (EditText) findViewById(R.id.et_pwd);
		// 隐藏当前的键盘
		et_pwd.setInputType(InputType.TYPE_NULL);
		
		bt_0 = (Button) findViewById(R.id.bt_0);
		bt_1 = (Button) findViewById(R.id.bt_1);
		bt_2 = (Button) findViewById(R.id.bt_2);
		bt_3 = (Button) findViewById(R.id.bt_3);
		bt_4 = (Button) findViewById(R.id.bt_4);
		bt_5 = (Button) findViewById(R.id.bt_5);
		bt_6 = (Button) findViewById(R.id.bt_6);
		bt_7 = (Button) findViewById(R.id.bt_7);
		bt_8 = (Button) findViewById(R.id.bt_8);
		bt_9 = (Button) findViewById(R.id.bt_9);
		
		bt_ok = (Button) findViewById(R.id.bt_ok);

		bt_ok.setOnClickListener(this);
		
		bt_clean_all = (Button) findViewById(R.id.bt_clean_all);

		bt_delete = (Button) findViewById(R.id.bt_delete);
		// 清空
		bt_clean_all.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				et_pwd.setText("");
			}
		});
		// 删除
		bt_delete.setOnClickListener(new OnClickListener() {

			private String str;

			@Override
			public void onClick(View v) {

				str = et_pwd.getText().toString();

				if (str.length() == 0) {
					return;
				}

				et_pwd.setText(str.substring(0, str.length() - 1));

			}
		});
		
		bt_0.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				String str = et_pwd.getText().toString();
				et_pwd.setText(str + bt_0.getText().toString());
			}
		});
		bt_1.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				String str = et_pwd.getText().toString();
				et_pwd.setText(str + bt_1.getText().toString());
			}
		});
		bt_2.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				String str = et_pwd.getText().toString();
				et_pwd.setText(str + bt_2.getText().toString());
			}
		});
		bt_3.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				String str = et_pwd.getText().toString();
				et_pwd.setText(str + bt_3.getText().toString());
			}
		});
		bt_4.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				String str = et_pwd.getText().toString();
				et_pwd.setText(str + bt_4.getText().toString());
			}
		});
		bt_5.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				String str = et_pwd.getText().toString();
				et_pwd.setText(str + bt_5.getText().toString());
			}
		});
		bt_6.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				String str = et_pwd.getText().toString();
				et_pwd.setText(str + bt_6.getText().toString());
			}
		});
		bt_7.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				String str = et_pwd.getText().toString();
				et_pwd.setText(str + bt_7.getText().toString());
			}
		});
		bt_8.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				String str = et_pwd.getText().toString();
				et_pwd.setText(str + bt_8.getText().toString());
			}
		});
		bt_9.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				String str = et_pwd.getText().toString();
				et_pwd.setText(str + bt_9.getText().toString());
			}
		});
		
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.bt_ok:
			String result = et_pwd.getText().toString();
			if ("123".equals(result)) {
				// 如果密码正确。说明是自己人
				/**
				 * 是自己家人。不要拦截他
				 */
				System.out.println("密码输入正确");

				Intent intent = new Intent();
				// 发送广播。停止保护
				intent.setAction("com.ldw.safe.stopprotect");
				// 跟狗说。现在停止保护短信
				intent.putExtra("packageName", packageName);

				sendBroadcast(intent);

				finish();

			} else {
				UIUtils.showToast(EnterPwdActivity.this, "密码错误");
			}

			break;

		}
		
	}
	
	@Override
	public void onBackPressed() {
		// 当用户输入后退健 的时候。我们进入到桌面
		Intent intent = new Intent();
		intent.setAction("android.intent.action.MAIN");
		intent.addCategory("android.intent.category.HOME");
		intent.addCategory("android.intent.category.DEFAULT");
		intent.addCategory("android.intent.category.MONKEY");
		startActivity(intent);
	}

}