Android appwidget service筆記

一開始service未啟動

  

按按鈕啟動service

再按按鈕顯示時間











android appwidget透過一個按鈕來啟動背景servicey,在透過另一按鈕更新時間(appwidget的建立可參考上一篇)











1. 

reciver註冊action (給按鈕1)Clock_widget

  <action android:name="test.widget_clock.CLICK1" />

service註冊action(給按鈕2)Myservice

  <action android:name="test.widget_clock.CLICK1" />

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="test.Clock_widget1"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="11" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
            <receiver android:name=".Clock_widget" >
            <intent-filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
              
                <action android:name="test.widget_clock.CLICK2" />
           
            </intent-filter>
            <meta-data android:name="android.appwidget.provider"
                android:resource="@xml/clockprovider" />
           </receiver>
           <service android:enabled="true" android:name=".Clock_widget$MyService">
      
           <intent-filter>
                <action android:name="test.widget_clock.CLICK1" />
            </intent-filter>
        </service>

    </application>
</manifest>

2.

//綁定service,注意androidmanifest receiver需註冊action
               Intent intent1 = new Intent(context, MyService.class);
              //啟動服務 
              context.startService(intent1);

 action動作的溝通需建立Intent

Clock_widget.java



package test.Clock_widget1;

import java.util.Calendar;
import java.util.Date;

import android.app.PendingIntent;
import android.app.Service;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.os.Handler;
import android.os.IBinder;
import android.widget.RemoteViews;
import android.widget.Toast;




public class Clock_widget extends AppWidgetProvider {
  
  
  
    //變數宣告
    public Handler c_Handler;
    public Handler r_Handler;
 
  
  
    public Calendar c_Calendar; //日曆
  
    public static String CLICK_ACTION1 ;
    public static String CLICK_ACTION2 ;
  

 
    public  Clock_widget() {
        //按鈕1字串
        CLICK_ACTION1 = "test.widget_clock.CLICK1";
        //按鈕2字串
        CLICK_ACTION2 = "test.widget_clock.CLICK2";
        c_Handler=new Handler();
      
      
     
      
      
    }
    @Override
     public void onReceive(Context context, Intent intent) {
          super.onReceive(context, intent);
          final String action = intent.getAction();
          if(action.equals(CLICK_ACTION2)){
              //if(c_Thread.isInterrupted())c_Thread.resume();
          
              //綁定service
               Intent intent1 = new Intent(context, MyService.class);
              //啟動服務  
              context.startService(intent1);
              
            
              Toast.makeText(context, "開時service", Toast.LENGTH_LONG).show();
          }
        
     }

        @Override
      
        public void onUpdate(Context context,AppWidgetManager appWidgetManager, int[] appWidgetIds) {
      
      
        
            //綁定Clock_widget注意androidmanifest receiver需註冊action
            final Intent refreshIntent1 = new Intent(context, Clock_widget.class);
            //set action字串
            refreshIntent1.setAction(Clock_widget.CLICK_ACTION2);
            final PendingIntent refreshPendingIntent1 = PendingIntent.getBroadcast(context, 0,refreshIntent1, PendingIntent.FLAG_UPDATE_CURRENT);
            //final PendingIntent refreshPendingIntent = PendingIntent.getService(cc, 0,refreshIntent, 0);
            RemoteViews updateViews1 = new RemoteViews( context.getPackageName(), R.layout.main);
            //設定button
            updateViews1.setOnClickPendingIntent(R.id.button2, refreshPendingIntent1);
            //update view
            appWidgetManager.updateAppWidget(appWidgetIds, updateViews1);
        
        
      
    
        }//onupdate
  
     
      
        public static class MyService extends Service {
          

          
          
            @Override
            public void onStart(Intent intent, int startId) {
                ComponentName thisWidget = new ComponentName(this, Clock_widget.class);
                AppWidgetManager manager = AppWidgetManager.getInstance(this);
                RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.main);
              
                //intent.getAction()取得action字串
                if (CLICK_ACTION1.equals(intent.getAction())) {
                  
                    Toast.makeText(this, "開時時間", Toast.LENGTH_LONG).show();
                    remoteViews.setTextViewText(R.id.textView1, new Date().toLocaleString());
                }else{
                    remoteViews.setTextViewText(R.id.textView1, "時間顯示器");  
                }
                //綁定Clock_widget注意androidmanifest receiver需註冊action
                Intent clickIntent = new Intent();
                clickIntent.setAction(CLICK_ACTION1);
                PendingIntent pendingIntent = PendingIntent.getService(this, 0, clickIntent, 0);
               
                remoteViews.setOnClickPendingIntent(R.id.button1, pendingIntent);
                manager.updateAppWidget(thisWidget, remoteViews);
              
            }
            @Override
            public IBinder onBind(Intent intent) {
                return null;
            }
        }

}