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I have an android widget that fetches data from a server every 10 minutes and display's it on the screen.
I'd like to add a "Refresh" button to that widget.
When the user clicks that button I'd like to run the method that fetches the information from the server.
Adding an event handler to a button in an application is very easy, however I couldn't find an example for a widget.
I'd like to get some help with adding a function to a button click in a widget.
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When the user clicks a button, the Button object receives an on-click event. To define the click event handler for a button, add the android:onClick attribute to the <Button> element in your XML layout. The value for this attribute must be the name of the method you want to call in response to a click event.
In Android, the OnClickListener() interface has an onClick(View v) method that is called when the view (component) is clicked. The code for a component's functionality is written inside this method, and the listener is set using the setOnClickListener() method.
Create a String (named hyperlink) in string. xml and give its value like link and then set property android:setText="@string/hyperlink" to Button.
Creating Anonymous View.OnClickListenerLink the button from the XML by calling findViewById() method and set the onClick listener by using setOnClickListener() method. setOnClickListener takes an OnClickListener object as the parameter. Basically it's creating an anonymous subclass OnClickListener in the parameter.
Here is one example more that should help:
package com.automatic.widget; import android.app.PendingIntent; import android.appwidget.AppWidgetManager; import android.appwidget.AppWidgetProvider; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.widget.RemoteViews; public class Widget extends AppWidgetProvider { private static final String SYNC_CLICKED = "automaticWidgetSyncButtonClick"; @Override public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) { RemoteViews remoteViews; ComponentName watchWidget; remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_layout); watchWidget = new ComponentName(context, Widget.class); remoteViews.setOnClickPendingIntent(R.id.sync_button, getPendingSelfIntent(context, SYNC_CLICKED)); appWidgetManager.updateAppWidget(watchWidget, remoteViews); } @Override public void onReceive(Context context, Intent intent) { // TODO Auto-generated method stub super.onReceive(context, intent); if (SYNC_CLICKED.equals(intent.getAction())) { AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context); RemoteViews remoteViews; ComponentName watchWidget; remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_layout); watchWidget = new ComponentName(context, Widget.class); remoteViews.setTextViewText(R.id.sync_button, "TESTING"); appWidgetManager.updateAppWidget(watchWidget, remoteViews); } } protected PendingIntent getPendingSelfIntent(Context context, String action) { Intent intent = new Intent(context, getClass()); intent.setAction(action); return PendingIntent.getBroadcast(context, 0, intent, 0); } } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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