Forcing An Android Widget to Update

Question

I have been trying relentlessly to figure out to have my widget update with a press of the button that is on the widget. The widget displays the current RAM remaining, CPU level, and Battery charge.

The code to determine those values work well. I just cant get it to update when I press the button. I have tried these methods :

Force Android widget to update - both methods shown

Android: How do I force the update of all widgets of a particular kind

Clickable widgets in android

And an alarm manager

None of them have worked.

My XML for my widget layout:

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"  
    android:layout_width="fill_parent"  
    android:layout_height="fill_parent"
    android:padding="10dp"
    android:background="@drawable/widgetbg">

        <TextView android:id="@+id/widgetCPU"
            android:layout_weight="1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/derp"   
            android:textSize="14sp"
            android:typeface="sans"
            android:textColor="@android:color/holo_blue_bright"
            android:gravity="center"/>

        <TextView android:id="@+id/widgetRam"
            android:layout_weight="1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/derp"   
            android:textSize="14sp"
            android:typeface="sans"
            android:textColor="@android:color/holo_blue_bright"
            android:gravity="center"/>

        <TextView android:id="@+id/widgetBat"
            android:layout_weight="1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/derp"   
            android:textSize="14sp"
            android:typeface="sans"
            android:textColor="@android:color/holo_blue_bright"
            android:gravity="center"/>
        <Button android:id="@+id/widgetUpdate"
                android:layout_weight="1"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/button_send" />

    </LinearLayout>

And the method I would like to call when the button is pressed :

    public class AppWidget extends AppwidgetProvider
    {
    //...
         public void update(Context c, AppWidgetManager a)
         { 
          //...
         }
    //...
    }

How would I be able to call the update method when my button is pressed?

score 1 · Answer 1 · answered Jan 12 '13 at 22:26

1

You could add an onClickListener to the button, and call the update method from within the listener.

Check out This link for more info on the interface

answered Jan 12 '13 at 22:26

dannyRods

552
6
23

score 1 · Accepted Answer · answered Jan 12 '13 at 22:31

1

register a listener, e.g. in your onCreate() method:

     findViewById(R.id.widgetUpdate).setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
                        update();
        }
    });

answered Jan 12 '13 at 22:31

koljaTM

10,064
2
40
42

Is there an onCreate() for a widget? – ADiabeticBadger Jan 13 '13 at 00:04
no but for the activity in which it resides. Or where do you inflate the layout? – koljaTM Jan 13 '13 at 09:18
I have created a service to update my widget and I use the line RemoteViews rvs = new RemoteViews(cn.getPackageName(), R.layout.widget_layout to inflate it. – ADiabeticBadger Jan 13 '13 at 17:58
Ah, didn't notice the AppWidget part there. Your only chance then is to add a PendingIntent to the widget as whole and do your update in the intent receiver. – koljaTM Jan 13 '13 at 19:42
I tried the answer in http://stackoverflow.com/questions/2748613/force-android-widget-to-update. With no avail. Any ideas on how to make it work? – ADiabeticBadger Jan 14 '13 at 03:10
sorry, the only thing I did from a widget was open my activity – koljaTM Jan 14 '13 at 08:53

Forcing An Android Widget to Update

2 Answers2