Android: Widget with TextView and Button(TextView changes when we click on Button)

layout/activity_main.xml


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#FFFFFF" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="@string/hello_world"
        android:textColor="#000000" />


 <Button
        android:id="@+id/wid_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView1"
        android:text="Click"
        android:textColor="#000000" />


</RelativeLayout>


res/xml/hello_widget_provider.xml

<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
    android:initialLayout="@layout/activity_main"
    android:minHeight="100dp"
    android:minWidth="300dp"
    android:updatePeriodMillis="1000"
    >
</appwidget-provider>

MainActivity.java

public class MainActivity extends AppWidgetProvider {
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {

RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
R.layout.activity_main);
remoteViews.setOnClickPendingIntent(R.id.wid_button,
buildButtonPendingIntent(context));

pushWidgetUpdate(context, remoteViews);
}

public static PendingIntent buildButtonPendingIntent(Context context) {
Intent intent = new Intent();
intent.setAction("CHANGE_TEXT");
return PendingIntent.getBroadcast(context, 0, intent,
PendingIntent.FLAG_UPDATE_CURRENT);
}

public static void pushWidgetUpdate(Context context, RemoteViews remoteViews) {
ComponentName myWidget = new ComponentName(context, MainActivity.class);
AppWidgetManager manager = AppWidgetManager.getInstance(context);
manager.updateAppWidget(myWidget, remoteViews);
}

}

MainActivityProvider.java

public class MainActivityProvider extends BroadcastReceiver {

private static int clickCount = 0;

@Override

public void onReceive(Context context, Intent intent) {

if (intent.getAction().equals("CHANGE_TEXT")) {

updateWidgetText(context);

}

}

private void updateWidgetText(Context context) {

RemoteViews remoteViews = new RemoteViews(context.getPackageName(),

R.layout.activity_main);

remoteViews.setTextViewText(R.id.textView1, getImageToSet());

// remoteViews.setOnClickPendingIntent(R.id.wid_button,

// MainActivity.buildButtonPendingIntent(context));

MainActivity.pushWidgetUpdate(context.getApplicationContext(),

remoteViews);

}

private CharSequence getImageToSet() {

clickCount++;

return clickCount % 2 == 0 ? "Hai" : "Bye";

}

}

AndroidManifest.xml

In <application> add this


 <receiver android:name="MainActivity" >
            <intent-filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
            </intent-filter>

            <meta-data
                android:name="android.appwidget.provider"
                android:resource="@xml/hello_widget_provider" />
        </receiver>


 <receiver android:name="MainActivityProvider" >
            <intent-filter>
                <action android:name="CHANGE_TEXT" />
            </intent-filter>

            <meta-data
                android:name="android.appwidget.provider"
                android:resource="@xml/hello_widget_provider" />
        </receiver>