Android 接收到广播意图连接更改后如何更新小部件

我想在网络数据包连接发生变化时更新小部件文本及其颜色。甚至这个小部件也可以启用/禁用网络数据包数据。 android.net.conn.CONNECTIVITY的广播接收器\u更改已在android清单文件中注册，并且onReceive（）已在AppWidgetProvider类中重写

每当我启用/禁用连接onReceive（）时，我注意到一个非常奇怪的行为被触发了两次。在第一个实例中，我接收到

NetworkInfo

对象，但在第二个实例中，我没有接收到info实例。 但当我通过系统设置启用/禁用连接时，onReceive（）将被触发一次，并且

NetworkInfo

对象为空

这是我的清单文件

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

    <uses-sdk android:minSdkVersion="10" />
    <!-- Permissions -->
    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >

        <!-- Widget Broadcast receiver -->
        <receiver
            android:name=".ExampleAppWidgetProvider"
            android:label="Widget ErrorBuster" >
            <intent-filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
            </intent-filter>

            <meta-data
                android:name="android.appwidget.provider"
                android:resource="@xml/widget1_info" />
        </receiver>
        <service android:name=".UpdateWidgetService"></service>
    </application>
</manifest>

启用/禁用网络数据包连接的服务类

public class UpdateWidgetService extends Service {
    private static final String LOG = "de.vogella.android.widget.example";

    @Override
    public void onStart(Intent intent, int startId) {
        Log.i(LOG, "Called");
        // Create some random data

        AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this
                .getApplicationContext());

        int[] allWidgetIds = intent
                .getIntArrayExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS);

        ComponentName thisWidget = new ComponentName(getApplicationContext(),
                ExampleAppWidgetProvider.class);
        int[] allWidgetIds2 = appWidgetManager.getAppWidgetIds(thisWidget);
        Log.w(LOG, "From Intent" + String.valueOf(allWidgetIds.length));
        Log.w(LOG, "Direct" + String.valueOf(allWidgetIds2.length));

        for (int widgetId : allWidgetIds) {
            // Create some random data
            int number = (new Random().nextInt(100));

            RemoteViews remoteViews = new RemoteViews(this
                    .getApplicationContext().getPackageName(),
                    R.layout.widget1);
            Log.w("WidgetExample", String.valueOf(number));
            EnableDisableConnectivity edConn = new EnableDisableConnectivity(this.getApplicationContext());
            edConn.enableDisableDataPacketConnection(!checkConnectivityState(this.getApplicationContext()));

            // Register an onClickListener
            Intent clickIntent = new Intent(this.getApplicationContext(),
                    ExampleAppWidgetProvider.class);

            clickIntent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
            clickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS,
                    allWidgetIds);

            PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, clickIntent,
                    PendingIntent.FLAG_UPDATE_CURRENT);
            remoteViews.setOnClickPendingIntent(R.id.BtEnableDisable, pendingIntent);
            appWidgetManager.updateAppWidget(widgetId, remoteViews);
        }
        stopSelf();

        super.onStart(intent, startId);
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    private boolean checkConnectivityState(Context context){
        final TelephonyManager telephonyManager = (TelephonyManager) context
                .getSystemService(Context.TELEPHONY_SERVICE);
        return telephonyManager.getDataState() == TelephonyManager.DATA_CONNECTED;

    }
}

我还尝试使用广播接收器类，每当连接发生变化时，我都会收到NetworkInfo。但我不知道如何从广播接收器更新小部件文本/颜色

收到连接\更改意图后，是否有其他方法可以更新小部件文本/颜色

编辑： 我无法理解为什么我在

AppWidgetProvider

中获得了两个连接更改意图，但我学会了如何从广播接收器更新小部件，下面是代码

public class ConnectivityReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        NetworkInfo info = (NetworkInfo)intent.getExtras().get(ConnectivityManager.EXTRA_NETWORK_INFO);

        if(info.getType() == ConnectivityManager.TYPE_MOBILE){

            RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
                    R.layout.widget1);

            if(info.isConnectedOrConnecting()){
                Toast.makeText(context, "Data packet enabled", Toast.LENGTH_SHORT).show();
                Log.d("RK","Mobile data is enabled");
                remoteViews.setTextColor(R.id.BtEnableDisable, Color.GREEN);
                remoteViews.setTextViewText(R.id.BtEnableDisable, "Enabled");
            }else{
                Toast.makeText(context, "Data packet disabled", Toast.LENGTH_SHORT).show();
                Log.e("RK","Mobile data is disconnected");
                remoteViews.setTextColor(R.id.BtEnableDisable, Color.BLACK);
                remoteViews.setTextViewText(R.id.BtEnableDisable,"Disabled");
            }

            ComponentName thiswidget = new ComponentName(context, ExampleAppWidgetProvider.class);
            AppWidgetManager manager = AppWidgetManager.getInstance(context);
            manager.updateAppWidget(thiswidget, remoteViews);

        }
    }

}

---

如果有人知道为什么我有两个改变的意图，请在这里分享你的想法。非常感谢您的帮助。

现在我发现了为什么当单击按钮启用/禁用网络时，

onReceive（）

会被调用两次。 1.当

APPWIDGET\u UPDATE

intent广播时，它第一次被调用。 2.当

连接更改
意图广播时，第二次调用它

无论如何，我能够从广播接收器更新小部件，源代码已经发布在上面的帖子中

public class ConnectivityReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        NetworkInfo info = (NetworkInfo)intent.getExtras().get(ConnectivityManager.EXTRA_NETWORK_INFO);

        if(info.getType() == ConnectivityManager.TYPE_MOBILE){

            RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
                    R.layout.widget1);

            if(info.isConnectedOrConnecting()){
                Toast.makeText(context, "Data packet enabled", Toast.LENGTH_SHORT).show();
                Log.d("RK","Mobile data is enabled");
                remoteViews.setTextColor(R.id.BtEnableDisable, Color.GREEN);
                remoteViews.setTextViewText(R.id.BtEnableDisable, "Enabled");
            }else{
                Toast.makeText(context, "Data packet disabled", Toast.LENGTH_SHORT).show();
                Log.e("RK","Mobile data is disconnected");
                remoteViews.setTextColor(R.id.BtEnableDisable, Color.BLACK);
                remoteViews.setTextViewText(R.id.BtEnableDisable,"Disabled");
            }

            ComponentName thiswidget = new ComponentName(context, ExampleAppWidgetProvider.class);
            AppWidgetManager manager = AppWidgetManager.getInstance(context);
            manager.updateAppWidget(thiswidget, remoteViews);

        }
    }

}