查看文档中app components--->App Widget
这里还有那个点击按钮,开启广播功能的那个广播没写,这里就不写了
1.编写一个类继承AppWidgetProvider
这里开启了服务,如果服务没写,就会在创建窗口小部件时报错,可以把开启,关闭服务的功能屏蔽(这里没有屏蔽),要不会报错
package com.example.mobilesafe.provider;
import java.security.Provider;
import java.util.Timer;
import java.util.TimerTask;
import com.example.mobilesafe.service.updateWeightViewService;
import android.annotation.SuppressLint;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.text.format.Time;
public class MyAppWidgetProvider extends AppWidgetProvider {
@Override
public void onEnabled(Context context) {
context.startService(new Intent(context, updateWeightViewService.class));
super.onEnabled(context);
}
@Override
public void onReceive(Context context, Intent intent) {
context.startService(new Intent(context, updateWeightViewService.class));
super.onReceive(context, intent);
}
@SuppressLint("NewApi")
@Override
public void onAppWidgetOptionsChanged(Context context,
AppWidgetManager appWidgetManager, int appWidgetId,
Bundle newOptions) {
// TODO Auto-generated method stub
super.onAppWidgetOptionsChanged(context, appWidgetManager, appWidgetId,
newOptions);
}
@Override
public void onDisabled(Context context) {
context.stopService(new Intent(context, updateWeightViewService.class));
super.onDisabled(context);
}
}
2.在清单文件里配置这个类
<receiver android:name="com.example.mobilesafe.provider.MyAppWidgetProvider" >
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="@xml/my_appwidget_info" />
</receiver>
<receiver android:name="com.example.mobilesafe.provider.MyAppWidgetProvider" >是类名
android:resource="@xml/my_appwidget_info" />是一个配置文件
3.配置文件
在xml下创建一个配置文件,名字叫my_appwidget_info
<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
android:initialLayout="@layout/process_widget"
android:minHeight="72.0dip"
android:minWidth="294.0dip"
android:updatePeriodMillis="0" />
android:initialLayout="@layout/process_widget"是布局文件
4.布局文件
就是普通的布局文件
<?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="wrap_content"
android:id="@+id/ll_Weight"
android:background="@drawable/widget_bg_portrait"
android:gravity="center_vertical" >
<LinearLayout
android:layout_width="0.0dip"
android:layout_height="fill_parent"
android:layout_marginLeft="5.0dip"
android:layout_weight="1.0"
android:background="@drawable/widget_bg_portrait_child"
android:gravity="center_vertical"
android:orientation="vertical"
android:paddingBottom="3.0dip"
android:paddingTop="3.0dip" >
<TextView
android:id="@+id/tv_processCount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10.0dip" />
<ImageView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="1.0dip"
android:layout_marginTop="1.0dip"
android:background="@drawable/widget_bg_portrait_child_divider" />
<TextView
android:id="@+id/tv_processSpace"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10.0dip" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:orientation="vertical" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical" >
<ImageView
android:layout_width="20.0dip"
android:layout_height="20.0dip"
android:src="@drawable/ic_launcher" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/app_name"
android:textColor="#fff" />
</LinearLayout>
<Button
android:id="@+id/bt_clear"
android:layout_width="90.0dip"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginTop="5.0dip"
android:background="@drawable/restart_bg"
android:text="一键清理"
android:textColor="#000" />
</LinearLayout>
</LinearLayout>
5到这里显示工作就完成了一大部分,但是这个窗口小部件不能显示数据,点击也没有响应(因为第一步那个服务还没写),甚至会报错,下面就是通过第一步那个没有实现的服务实现所有功能
6.服务
package com.example.mobilesafe.service;
import java.util.Timer;
import java.util.TimerTask;
import com.example.mobilesafe.R;
import com.example.mobilesafe.engine.AppProcessEngine;
import android.app.PendingIntent;
import android.app.Service;
import android.appwidget.AppWidgetManager;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.IBinder;
import android.text.format.Formatter;
import android.util.Log;
import android.widget.RemoteViews;
public class updateWeightViewService extends Service {
private myReceiver myReceiver;
private TimerTask timerTask;
private Timer timer;
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(Intent.ACTION_SCREEN_ON);
myReceiver = new myReceiver();
registerReceiver(myReceiver, intentFilter);
startUpdate();
super.onCreate();
}
/**
* 开启任务
*/
private void startUpdate() {
timer = new Timer();
timerTask = new TimerTask() {
@Override
public void run() {
updateWeight();
}
};
timer.schedule(timerTask, 0, 5000);
}
/**
* 更新控件
*/
private void updateWeight() {
AppWidgetManager aWM = AppWidgetManager
.getInstance(getApplicationContext());
RemoteViews views = new RemoteViews(getPackageName(),
R.layout.process_widget);
// 设置文本更新1
views.setTextViewText(
R.id.tv_processCount,
"进程数:"
+ AppProcessEngine
.getProcessCount(getApplicationContext()));
// 设置文本更新2
views.setTextViewText(
R.id.tv_processSpace,
"内存:"
+ Formatter
.formatFileSize(
getApplicationContext(),
AppProcessEngine
.getAvlibeProcessSpace(getApplicationContext())));
// 点击打开应用
Intent intent = new Intent("android.intent.action.HOME");
intent.addCategory("android.intent.category.DEFAULT");
PendingIntent pendingIntent = PendingIntent.getActivity(
getApplicationContext(), 0, intent,
PendingIntent.FLAG_UPDATE_CURRENT);
views.setOnClickPendingIntent(R.id.ll_Weight, pendingIntent);
// 点击清理内存
Intent intent2 = new Intent(
"android.intent.action.KILL_BACKGROUND_PROCESS");
PendingIntent pendingIntent2 = PendingIntent.getBroadcast(this, 0,
intent2, PendingIntent.FLAG_UPDATE_CURRENT);
views.setOnClickPendingIntent(R.id.bt_clear, pendingIntent2);
// 得到componentName
ComponentName componentName = new ComponentName(
getApplicationContext(),
"com.example.mobilesafe.provider.MyAppWidgetProvider");
aWM.updateAppWidget(componentName, views);
}
/**
* 停止任务
*/
private void stopUpdate() {
if (timer != null) {
timer.cancel();
}
}
private class myReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (Intent.ACTION_SCREEN_ON.equals(intent.getAction())) {
startUpdate();
} else {
stopUpdate();
}
}
}
@Override
public void onDestroy() {
if (myReceiver != null) {
unregisterReceiver(myReceiver);
}
stopUpdate();
super.onDestroy();
}
}
这里还有那个点击按钮,开启广播功能的那个广播没写,这里就不写了