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系统进程显示和隐藏
1.创建进程管理设置页面:ProcessManagerSettingActivity
2.编写设置页面布局文件
3.监听Checkbox的勾选事件,更新本地SharePreference
根据本地记录,更新checkbox状态
boolean showSystem = mPrefs.getBoolean("show_system_process", true);
if (showSystem) {
cbShowSystem.setChecked(true);
cbShowSystem.setText("显示系统进程");
} else {
cbShowSystem.setChecked(false);
cbShowSystem.setText("不显示系统进程");
}
设置状态勾选监听
cbShowSystem.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if (isChecked) {
cbShowSystem.setText("显示系统进程");
mPrefs.edit().putBoolean("show_system_process", true).commit();
} else {
cbShowSystem.setText("不显示系统进程");
mPrefs.edit().putBoolean("show_system_process", false)
.commit();
}
}
});
4.根据sp记录的是否显示系统进程,更新listview的显示个数
@Override
public int getCount() {
// 通过判断是否显示系统进程,更新list的数量
boolean showSystem = mPrefs.getBoolean("show_system_process", true);
if (showSystem) {
return 1 + mUserProcessList.size() + 1 + mSystemProcessList.size();
} else {
return 1 + mUserProcessList.size();
}
}
5.保证勾选框改变后,listview可以立即刷新
public void setting(View view) {
startActivityForResult(new Intent(this,
ProcessManagerSettingActivity.class), 0);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// 当从设置页面回跳回来之后,刷新listview
mAdapter.notifyDataSetChanged();
}
锁屏清理
1.判断锁屏清理的广播是否正在运行
boolean serviceRunning = ServiceStatusUtils.isServiceRunning(
"com.ziyang.mobilesafeteach.service.AutoKillService", this);
if (serviceRunning) {
cbLockClear.setChecked(true);
cbLockClear.setText("当前状态:锁屏清理已经开启");
} else {
cbLockClear.setChecked(false);
cbLockClear.setText("当前状态:锁屏清理已经关闭");
}
cbLockClear.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
Intent intent = new Intent(ProcessManagerSettingActivity.this,
AutoKillService.class);
if (isChecked) {
// 启动锁屏清理的服务
startService(intent);
cbLockClear.setText("当前状态:锁屏清理已经开启");
} else {
// 关闭锁屏清理的服务
stopService(intent);
cbLockClear.setText("当前状态:锁屏清理已经关闭");
}
}
});
2.锁屏清理进程的服务
public class AutoKillService extends Service {
private InnerScreenOffReceiver mReceiver;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
//监听屏幕关闭的广播, 该广播只能在代码中注册,不能在清单文件中注册
mReceiver = new InnerScreenOffReceiver();
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_SCREEN_OFF);
registerReceiver(mReceiver, filter);
}
@Override
public void onDestroy() {
super.onDestroy();
unregisterReceiver(mReceiver);
mReceiver = null;
}
3.锁屏关闭的广播接收者
class InnerScreenOffReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
System.out.println("屏幕关闭...");
// 杀死后台所有运行的进程
ActivityManager am =(ActivityManager)getSystemService(ACTIVITY_SERVICE);
List<RunningAppProcessInfo> runningAppProcesses =
am.getRunningAppProcesses();
for (RunningAppProcessInfo runningAppProcessInfo : runningAppProcesses) {
// 跳过手机卫士的服务
if(runningAppProcessInfo.processName.equals(ctx.getPackageName())) {
return;
}
am.killBackgroundProcesses(runningAppProcessInfo.processName);
}
}
}
}
4.定时器清理
// 在AutoKillService的onCreate中启动定时器,定时清理任务
mTimer = new Timer();
mTimer.schedule(new TimerTask() {
@Override
public void run() {
System.out.println("5秒运行一次!");
}
}, 0, 5000);
@Override
protected void onDestroy() {
super.onDestroy();
mTimer.cancel();
mTimer = null;
}
桌面Widget(窗口小部件)
1. 在com.ziyang.mobilesafe.receiver目录下创建MyWidget并继承AppWidgetProvider
2. 在功能清单文件注册，参照文档
<receiver android:name=".receiver.MyWidget" > <intent-filter> <action android:name="android.appwidget.action.APPWIDGET_UPDATE" /> </intent-filter> <meta-data android:name="android.appwidget.provider" android:resource="@xml/appwidget_info" /> </receiver>
3. 在res/xml/创建文件example_appwidget_info.xml拷贝文档内容
<appwidget-providerxmlns:android="http://schemas.android.com/apk/res/android" android:minWidth="294dp" android:minHeight="72dp"//能被调整的最小宽高，大于minWidth minHeight忽略 android:updatePeriodMillis="86400000"//更新周期,毫秒,最短默认半小时 android:previewImage="@drawable/preview"//默认是ic_launcher android:initialLayout="@layout/example_appwidget"//布局文件 android:configure="com.example.android.ExampleAppWidgetConfigure" android:resizeMode="horizontal|vertical"//widget可以被拉伸的方向 android:widgetCategory="home_screen|keyguard"//在屏幕主页和锁屏状态也能显示 android:initialKeyguardLayout="@layout/example_keyguard"//锁屏状态显示样式 > </appwidget-provider>
4. 精简example_appwidget_info.xml文件,最终结果:
<appwidget-provider-xmlns:android="http://schemas.android.com/apk/res/android" android:minWidth="294dp" android:minHeight="72dp" android:updatePeriodMillis="1800000" android:initialLayout="@layout/appwidget" > </appwidget-provider>
5. widget布局文件:appwidget.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 android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="#f00" android:text="我是widget,哈哈哈" android:textSize="30sp" /> </LinearLayout>
widget生命周期
public class MyWidget extends AppWidgetProvider {
/**
* widget的每次变化都会调用onReceive
*/
@Override
public void onReceive(Context context, Intent intent) {
super.onReceive(context, intent);
System.out.println("MyWidget: onReceive");
}
/**
* 当widget第一次被添加时,调用onEnable
*/
@Override
public void onEnabled(Context context) {
super.onEnabled(context);
System.out.println("MyWidget: onEnabled");
}
/**
* 当widget完全从桌面移除时,调用onDisabled
*/
@Override
public void onDisabled(Context context) {
super.onDisabled(context);
System.out.println("MyWidget: onDisabled");
}
/**
* 新增widget时,或者widget更新时,调用onUpdate
* 更新时间取决于xml中配置的时间,最短为半小时
*/
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {
super.onUpdate(context, appWidgetManager, appWidgetIds);
System.out.println("MyWidget: onUpdate");
}
/**
* 删除widget时,调onDeleted
*/
@Override
public void onDeleted(Context context, int[] appWidgetIds) {
super.onDeleted(context, appWidgetIds);
System.out.println("MyWidget: onDeleted");
}
/**
* 当widget大小发生变化时,调用此方法
*/
@Override
public void onAppWidgetOptionsChanged(Context context,
AppWidgetManager appWidgetManager, int appWidgetId,
Bundle newOptions) {
System.out.println("MyWidget: onAppWidgetOptionsChanged");
}
}
更新widget方法
/**
* 定时更新widget的service
*
* @author Kevin
*
*/
public class UpdateWidgetService extends Service {
private Timer mTimer;
private AppWidgetManager mAWM;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
mAWM = AppWidgetManager.getInstance(this);
// 启动定时器,每个5秒一更新
mTimer = new Timer();
mTimer.schedule(new TimerTask() {
@Override
public void run() {
System.out.println("更新widget啦!");
updateWidget();
}
}, 0, 5000);
}
/**
* 更新widget
*/
private void updateWidget() {
// 初始化远程的view对象
RemoteViews views = new RemoteViews(getPackageName(),
R.layout.process_widget);
views.setTextViewText(R.id.tv_running_processes, "正在运行的软件:"
+ ProcessInfoProvider.getRunningProcessNum(this));
views.setTextViewText(
R.id.tv_memory_left,
"可用内存:"
+ Formatter.formatFileSize(this,
ProcessInfoProvider.getAvailMemory(this)));
// 初始化组件
ComponentName provider = new ComponentName(this, MyWidget.class);
// 更新widget
mAWM.updateAppWidget(provider, views);
}
@Override
public void onDestroy() {
super.onDestroy();
mTimer.cancel();
mTimer = null;
}
}
点击事件处理
// 初始化延迟意图,pending是等待的意思
Intent intent = new Intent(this, HomeActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
intent, PendingIntent.FLAG_UPDATE_CURRENT);
// 当点击widget布局时,跳转到主页面
views.setOnClickPendingIntent(R.id.ll_root, pendingIntent);
//当一键清理被点击是,发送广播,清理内存
Intent btnIntent = new Intent();
btnIntent.setAction("com.ziyang.mobilesafeteach.KILL_ALL");
PendingIntent btnPendingIntent = PendingIntent.getBroadcast(this, 0,
btnIntent, PendingIntent.FLAG_UPDATE_CURRENT);
views.setOnClickPendingIntent(R.id.btn_clear, btnPendingIntent);
---------------------------
/**
* 杀死后台进程的广播接受者
* 清单文件中配置action="com.ziyang.mobilesafeteach.KILL_ALL"
*
* @author Kevin
*
*/
public class KillAllReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
System.out.println("kill all...");
// 杀死后台所有运行的进程
ProcessInfoProvider.killAll(context);
}
}
---------------------------
<receiver android:name=".receiver.KillAllReceiver" >
<intent-filter>
<action android:name="com.ziyang.mobilesafeteach.KILL_ALL" />
</intent-filter>
</receiver>
做一个有情怀的程序员, 拒绝耗电!
当锁屏关闭时,停止widget定时器的更新
UpdateWidgetService:
// 注册屏幕开启和关闭的广播接受者
mReceiver = new InnerScreenReceiver();
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_SCREEN_OFF);
filter.addAction(Intent.ACTION_SCREEN_ON);
registerReceiver(mReceiver, filter);
/**
* 屏幕关闭和开启的广播接收者
*
* @author Kevin
*
*/
class InnerScreenReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (Intent.ACTION_SCREEN_OFF.equals(action)) {// 屏幕关闭
if (mTimer != null) {
// 停止定时器
mTimer.cancel();
mTimer = null;
}
} else {// 屏幕开启
startTimer();
}
}
}
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