android学习——App Widget

有时候 eclipse 和  虚拟机 两次跑一个程序 出不一样的结果 。 崩溃。。。。

建个 xml/hello_appwidget_info.xml

<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
    android:minWidth="294dp"
    android:minHeight="272dp"
    android:updatePeriodMillis="86400000"
    android:initialLayout="@layout/hello_appwidget"
    >
    <!-- android:configure="demo.appwidget.AppWidgetConfig"  -->
</appwidget-provider>

布局  hello_appwidget

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
	android:id="@+id/widgetText"
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="textfirst"
    />
<Button
	android:id="@+id/widgetButton"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:text="点击普通监听"
 />
 
<Button
	android:id="@+id/widgetButton2"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:text="通过广播监听 "
 />
 
 <Button
	android:id="@+id/widgetButton3"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:text="测试 "
 />
</LinearLayout>

maifest

	<application android:icon="@drawable/icon" android:label="@string/app_name">
		<activity android:name=".HelloAppWidget" android:label="@string/app_name">
			<intent-filter>
				<action android:name="android.intent.action.MAIN" />
				<category android:name="android.intent.category.LAUNCHER" />
			</intent-filter>
		</activity>
		<receiver android:name="HelloAppWidgetProvider">
			<intent-filter>
				<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
			</intent-filter>
			<intent-filter>
				<action android:name="demo.appwidget.APPWIDGET_UPDATE" />
			</intent-filter>
			<meta-data android:name="android.appwidget.provider"
				android:resource="@xml/hello_appwidget_info" />
		</receiver>
		<activity android:name=".AppWidgetConfig">
    <intent-filter>
        <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
    </intent-filter>
</activity>
	</application>

java

public class HelloAppWidgetProvider extends AppWidgetProvider {

	private static final String ACTION_UPATE="demo.appwidget.APPWIDGET_UPDATE";
	@Override
	public void onDeleted(Context context, int[] appWidgetIds) {
		// TODO Auto-generated method stub
		System.out.println("onDeleted");
		super.onDeleted(context, appWidgetIds);
	}

	@Override
	public void onDisabled(Context context) {
		// TODO Auto-generated method stub
		System.out.println("onDisabled");
		super.onDisabled(context);
	}

	//只有在第一次添加一个widget才调用此方法
	@Override
	public void onEnabled(Context context) {
		// TODO Auto-generated method stub
		System.out.println("onEnabled");
		super.onEnabled(context);
	}
	//每次都调用update
	@Override
	public void onReceive(Context context, Intent intent) {
		// TODO Auto-generated method stub
		System.out.println("onReceive");
		String action = intent.getAction();
		if (ACTION_UPATE.equals(action)) {
			System.out.println(action);
			RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
					R.layout.hello_appwidget);
			remoteViews.setTextViewText(R.id.widgetText, "接受广播之后的值");
			AppWidgetManager appWidgetManager = AppWidgetManager
					.getInstance(context);
			ComponentName componentName = new ComponentName(context,
					HelloAppWidgetProvider.class);
			// 更新
			appWidgetManager.updateAppWidget(componentName, remoteViews);
		} else {
			super.onReceive(context, intent);
		}

	}
	//接着调用update
	@Override
	public void onUpdate(Context context, AppWidgetManager appWidgetManager,
			int[] appWidgetIds) {
		// TODO Auto-generated method stub
		System.out.println("onUpdate");
		//给所有的appWidgets 添加监听事件
		for (int i = 0; i < appWidgetIds.length; i++) {
			System.out.println("update"+appWidgetIds[i]);
			Intent intent=new Intent(context,AppWidgetConfig.class);
			
			PendingIntent pendingIntent=PendingIntent.getActivity(context, 0, intent, 0);
			//得到appwidget控件
			RemoteViews remoteView= new RemoteViews(context.getPackageName(), R.layout.hello_appwidget);
			//在appWidget中的控件
			remoteView.setOnClickPendingIntent(R.id.widgetButton, pendingIntent);
			//更新指定id控件
			appWidgetManager.updateAppWidget(appWidgetIds[i], remoteView);
		}
		
		//使用广播
		Intent intent=new Intent();
		intent.setAction(ACTION_UPATE);
		PendingIntent pendingIntent=PendingIntent.getBroadcast(context, 0, intent, 0);
		
		RemoteViews remoteViews=new RemoteViews(context.getPackageName(), R.layout.hello_appwidget);
		remoteViews.setOnClickPendingIntent(R.id.widgetButton2, pendingIntent);
		appWidgetManager.updateAppWidget(appWidgetIds, remoteViews);
		
		super.onUpdate(context, appWidgetManager, appWidgetIds);
	}

	
}

我在同一个provider 中即使用了 getActivity() 和  getBroadcast()    测试的时候发现 有时候行 有时候不行  ， 有知道怎么回事的不  ？ 请教？