80锁屏清理进程（重点）

来源：互联网发布：什么软件p图好用编辑：程序博客网时间：2024/06/05 07:54

锁屏清理进程是一个比较有用的功能，可以为用户节省很多的电量，锁屏清理进程也比定时清理进程优点多。说下思路：

判断用户是否锁屏需要注册一个广播接收者去监听，当然这个广播接收者放在服务里面比较好，试想如果放在Activity里面，当Activity执行onDestory()的时候，广播接收者就没了。而且这个广播接受者必须是代码注册。

package com.ustc.mobilemanager.service;import java.util.List;import android.app.ActivityManager;import android.app.ActivityManager.RunningAppProcessInfo;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.util.Log;public class AutoCleanService extends Service {public static final String TAG = "AutoCleanService";private ScreenOffReceiver receiver;private ActivityManager am;@Overridepublic void onCreate() {am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);receiver = new ScreenOffReceiver();IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF);registerReceiver(receiver, filter);super.onCreate();}@Overridepublic IBinder onBind(Intent intent) {return null;}@Overridepublic void onDestroy() {unregisterReceiver(receiver);receiver = null;super.onDestroy();}private class ScreenOffReceiver extends BroadcastReceiver{@Overridepublic void onReceive(Context context, Intent intent) {Log.i(TAG, "屏幕锁屏啦!");List<RunningAppProcessInfo> infos = am.getRunningAppProcesses();for (RunningAppProcessInfo info : infos) {am.killBackgroundProcesses(info.processName);}}}}

CheckBox的点击事件：

cb_auto_clean.setOnCheckedChangeListener(new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {// 锁屏的广播事件是一个特殊的广播事件，在清单文件配置广播接受者是不会生效的// 锁屏的广播接受者必须在代码中注册（写在服务里）Intent intent = new Intent(TaskSettingActivity.this,AutoCleanService.class);if (isChecked) {startService(intent);} else {stopService(intent);}}});

CheckBox的状态与服务的生存期有关：

@Overrideprotected void onStart() {boolean running = ServiceUtils.isServiceRunning(this,"com.ustc.mobilemanager.service.AutoCleanService");cb_auto_clean.setChecked(running);super.onStart();}

0 0