28-meta-data widgets_meta中 widgets-优快云博客

meta-data

api位置

Framework Topics/The AndroidManifest.xml File/<meta-data> 配置额外参数

<activity>
<activity-alias>
<service>
<receiver>

/metadata/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="cn.itcast.metadata"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".MainActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
            
            <meta-data android:name="cn.itcast.name" android:value="liming"/>
            <meta-data android:name="cn.itcast.age" android:value="5"/>
            <meta-data android:name="cn.itcast.app" android:value="@string/hello"/><code></code><span style="color:#FF0000;">把String中添加进来</span>
            <meta-data android:name="cn.itcast.id" android:resource="@string/hello"/> <span style="color:#FF0000;">把String中的id添加进来</span>
        </activity>
    </application> 
</manifest><code></code>

widgets

桌面可以存放多个，更新id或名称

package cn.itcast.widgets;


import java.text.SimpleDateFormat;
import java.util.Date;

import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;
import android.widget.RemoteViews;

public class TimeWidgetProvider extends AppWidgetProvider {

	@Override
	public void onDeleted(Context context, int[] appWidgetIds) {//当用户从桌面上删除widgets的时候就会调用此方法
		
	}
	
	@Override
	public void onEnabled(Context context) {//第一次往桌面添加Widgets的时候才会被调用，往后再往桌面添加同类型Widgets的时候是不会被调用的
		context.startService(new Intent(context, TimerService.class));
	}



	@Override
	public void onDisabled(Context context) {//是在最后一个同类型Widgets实例被删除的时候调用
		context.stopService(new Intent(context, TimerService.class));
	}


 //接收到更新广播的时候进入此方法，添加完后进入此方法  生命周期短，很快就结束 不能使用子线程只能用服务
	@Override
	public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
		//只会更新一次
		//		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
//		String time = dateFormat.format(new Date());
//		// time_appwidget 界面文件的id
//		RemoteViews remoteView = new RemoteViews(context.getPackageName(), R.layout.time_appwidget);
//		remoteView.setTextViewText(R.id.textView, time);
//		//AppWidgetManager管理桌面所有的widgets 同类型的所有widgets appWidgetIds[0]当前我们添加的对象
//		appWidgetManager.updateAppWidget(appWidgetIds[0], remoteView);
	}

}

/Widgets/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="cn.itcast.widgets"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        
        <receiver android:name=".TimeWidgetProvider">
            <intent-filter>
		        <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
		    </intent-filter>
		    <!-- 1appwidget_info widgets配置文件 高度 宽度等 -->
		    <meta-data android:name="android.appwidget.provider" android:resource="@xml/appwidget_info" />
        </receiver>
        
            <service android:name=".TimerService"></service>
    </application>
<uses-permission android:name="android.permission.CALL_PHONE"/>
   
</manifest>

/Widgets/res/layout/time_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" 
    android:background="@drawable/rectangle"
    >
<!-- rectangle 修饰用 -->
    <TextView 
        android:layout_width="match_parent"
   		android:layout_height="match_parent"
        android:id="@+id/textView"
        android:textColor="#FFFFFF"
        android:textSize="14dp"
        android:text="我是Widgets"
        />

</LinearLayout>
/Widgets/res/drawable/rectangle.xml
<?xml version="1.0" encoding="utf-8"?>
<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <corners android:radius="9dp"/>
    <gradient
        android:angle="270"       
        android:endColor="#5EADF4"
        android:startColor="#B3F0FF" />
    <padding
        android:left="5dp"
        android:top="5dp"
        android:right="5dp"
        android:bottom="5dp" />

    <stroke
        android:width="1dp"
        android:color="#0000CC"
        android:dashWidth="10dp"
        android:dashGap="6dp" />
</shape>

/Widgets/src/cn/itcast/widgets/TimerService.java 服务来调widgets

package cn.itcast.widgets;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;

import android.app.PendingIntent;
import android.app.Service;
import android.appwidget.AppWidgetManager;
import android.content.ComponentName;
import android.content.Intent;
import android.net.Uri;
import android.os.IBinder;
import android.widget.RemoteViews;

public class TimerService extends Service {
    private Timer timer;
    
    @Override
    public void onCreate() {
        super.onCreate();
        timer = new Timer();
        timer.schedule(new TimeUpdateTask(), 0, 1000);//定时任务
    }
    
    private final class TimeUpdateTask extends TimerTask{
        public void run() {
            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            String time = dateFormat.format(new Date());
            RemoteViews remoteView = new RemoteViews(getPackageName(), R.layout.time_appwidget);
            remoteView.setTextViewText(R.id.textView, time);
            PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 100,
                    new Intent(Intent.ACTION_CALL, Uri.parse("tel:133333333")), 0);//或者启动自身程序
                    
            remoteView.setOnClickPendingIntent(R.id.textView, pendingIntent);
            
            AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(getApplicationContext());
            
            appWidgetManager.updateAppWidget(
                    new ComponentName(getApplicationContext(), TimeWidgetProvider.class), remoteView); //更新同类型
        }        
    }

    @Override
    public void onDestroy() {
        timer.cancel();
        timer = null;
        super.onDestroy();
    }

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

}