android 考研appwidget的实现

 实现一个简单的appwidget

主要的功能有 显示时间 日期，显示考研倒计时间，显示天气，显示目标，以及一些励志话语等。

1.首先定义appwidget 的描述xml文件

在res文件下新建xml文件夹 新建kaoyan.xml文件

 

 

<?xml version="1.0" encoding="utf-8"?>

<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"

    android:minWidth="286dp"

    android:minHeight="142dp"

    android:initialLayout="@layout/kaoyan_widget"

    android:updatePeriodMillis="180000"

    android:configure="com.kaoyan.KaoyanActivity"

     >
</appwidget-provider>

android:minWidth="286dp"  //宽度

    android:minHeight="142dp"  //高度

    android:initialLayout="@layout/kaoyan_widget"  //布局文件

    android:updatePeriodMillis="180000" //刷新时间
 android:configure="com.kaoyan.KaoyanActivity"  // 配置文件

2.建立相应的layout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="fill_parent"
    android:orientation="horizontal"
    android:background="@drawable/beijing" >


    <LinearLayout
        android:layout_width="200dp"
    android:layout_height="fill_parent"
        android:paddingLeft="35dp"
    android:paddingTop="35dp"
    android:orientation="vertical"

        >
    <TextView
    android:id="@+id/daojishi"
    android:layout_height="wrap_content"
    android:textColor="#ffffff"
   android:paddingLeft="100dp"
    android:layout_width="wrap_content"
    android:gravity="center"
    android:textSize="15dp"
    android:text="300天"
     />
 <TextView
    android:id="@+id/time"
    android:layout_height="wrap_content"
    android:textColor="#ffffff"
    android:layout_marginTop="5dp"
    android:layout_width="150dp"
    android:gravity="center"
    android:textSize="10dp"
    android:text=""
     />
 <TextView
    android:id="@+id/mymubiao"
    android:layout_width="150dp"
    android:layout_height="wrap_content"
    android:paddingTop="5dp"
    android:textColor="#ffffff"
    android:gravity="center"
    android:text=""
     />
  <TextView
    android:id="@+id/yanyu"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
     android:paddingTop="5dp"
    android:textColor="#ffffff"
    android:text=""
     />
     <TextView
    android:id="@+id/tishi"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
     android:paddingTop="5dp"
    android:textColor="#ffffff"
    android:text=""
     />
</LinearLayout>


 <LinearLayout
        android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:paddingTop="35dp"
    android:orientation="vertical"
        >
     <ImageView
         android:id="@+id/tupian"
         android:layout_width="45dp"
         android:layout_height="45dp"
         android:layout_marginLeft="20dp"
         android:src="@drawable/qingtian"
          />
     <TextView
         android:id="@+id/tianqi"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
           android:textColor="#ffffff"
           android:textSize="8dp"
         android:text="" />
     <TextView
         android:id="@+id/mingtian"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
           android:textColor="#ffffff"
           android:textSize="8dp"
         android:text="" />
     </LinearLayout>

</LinearLayout>

4，建立相应的AppWidgetProvider类

 

package com.kaoyan;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.xmlpull.v1.XmlPullParserException;

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.util.Log;
import android.widget.RemoteViews;

public class kaoyanWidget extends AppWidgetProvider {

    @Override
    public void onDisabled(Context context) {
        // TODO Auto-generated method stub
        super.onDisabled(context);
        Log.i("kaoyanWidget", "onDisabled");
    }
    @Override
    public void onEnabled(Context context) {
        // TODO Auto-generated method stub
        super.onEnabled(context);
        Log.i("kaoyanWidget", "onEnabled");
    }
    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        super.onReceive(context, intent);
        Log.i("onReceive", intent.getAction());
    }
    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager,
            int[] appWidgetIds) {
        // TODO Auto-generated method stub

        Log.i("update", "开始更新");
        Log.i("update",appWidgetManager.getInstalledProviders().size()+" ");
        Intent intent = new Intent(context, UpdateService.class);
        context.startService(intent);
        URL aURL;
        try {
            aURL = new URL("http://www.google.com/ig/api?hl=zh_cn&weather=beijing");
            URLConnection con=  aURL.openConnection();
            InputStream  is= con.getInputStream();
            xmlParser mXml=new xmlParser();
            weather mweather=mXml.parser(is);
            RemoteViews views=new RemoteViews("com.kaoyan",R.layout.kaoyan_widget);
            views.setTextViewText(R.id.tianqi, "天气："+mweather.getCondition()+"   气温："+mweather.getTemp_c());
            views.setTextViewText(R.id.mingtian, "明天："+mweather.getmCondition()+"   "+mweather.getLow()+"~"+mweather.getHigh());
            Log.i("update", "天气："+mweather.getCondition()+"   气温："+mweather.getTemp_c());
            Log.i("update", "明天："+mweather.getmCondition()+"   "+mweather.getLow()+"~"+mweather.getHigh());
            appWidgetManager.updateAppWidget(appWidgetIds, views);
            for(int i=0;i<appWidgetIds.length;i++)
            Log.i("appWidgetIds", appWidgetIds[i]+" ");
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (XmlPullParserException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        super.onUpdate(context, appWidgetManager, appWidgetIds);
        Log.i("update", "更新结束");
    }
    @Override
    public void onDeleted(Context context, int[] appWidgetIds) {
        // TODO Auto-generated method stub
        Intent intent = new Intent(context, UpdateService.class);
        context.stopService(intent);

        super.onDeleted(context, appWidgetIds);
        Log.i("delete", appWidgetIds.toString());
    }

     public static class UpdateService extends Service {
         private Handler objHandler=new Handler();
         private Runnable mTasks=new Runnable(){

            public void run() {
                // TODO Auto-generated method stub
                RemoteViews views=new RemoteViews(UpdateService.this.getPackageName(),R.layout.kaoyan_widget);
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日     hh:mm:ss");
                views.setTextViewText(R.id.time, "" + sdf.format(new Date()));
                ComponentName thisWidget = new ComponentName(UpdateService.this, kaoyanWidget.class);
                AppWidgetManager manager = AppWidgetManager.getInstance(UpdateService.this);
                manager.updateAppWidget(thisWidget, views);
                objHandler.postDelayed(mTasks, 1000);
            }};

        @Override
        public IBinder onBind(Intent arg0) {
            // TODO Auto-generated method stub
            return null;
        }

        @Override
        public void onStart(Intent intent, int startId) {
            // TODO Auto-generated method stub
            Log.i("Service", "onStart");
            super.onStart(intent, startId);
            objHandler.postDelayed(mTasks, 1000);

        }

        @Override
        public void onDestroy() {
            // TODO Auto-generated method stub
            super.onDestroy();
            Log.i("Service", "onDestroy");
        }

     }





}