一次打开主要活动

Question

For my news-reader app, I made a widget. Using the widget it is possible to start the news-app. But if the user goes back to the home screen, with the back button, there still is an instance of the application. So if the user goes the applications-list (all the app's) and start the news-app again. There are 2 instances of the news app:S For closing the app, the users needs to push 2 times on the back button (because you see 2 times the same app). Can I do anything about it?

Here my code:

static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
        int appWidgetId) {


    Intent configIntent = new Intent(context, Main.class);
    PendingIntent configPendingIntent = PendingIntent.getActivity(context, 0, configIntent, 0);

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

    remoteViews.setOnClickPendingIntent(R.id.headlinesBox, configPendingIntent);

    // Tell the widget manager
    appWidgetManager.updateAppWidget(appWidgetId, remoteViews);

}

Answer 1

You can set true on android:clearTaskOnLaunch activity attribute in the Manifest file.

It should always close all the extra Activities and start the App from the first Activity.

Answer 2

It seems that you have to add to the manifest:

    <activity android:name=".Main"
              android:launchMode="singleInstance">
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>
        </intent-filter>
    </activity>