Android 23

snippet01.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:background="@drawable/frame">
  
  <TextView android:id="@+id/nome"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerVertical="true"
    android:layout_alignParentLeft="true"
    android:textSize="10pt"
    android:textColor="#FFFFFF" />
  
</RelativeLayout>

snippet02.java

package net.rafaeltoledo.restaurante;
 
import android.appwidget.AppWidgetProvider;
 
public class WidgetAplicativo extends AppWidgetProvider {
}

snippet03.xml

<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
  android:minWidth="300dip"
  android:minHeight="79dip"
  android:updatePeriodMillis="1800000"
  android:initialLayout="@layout/widget" />

snippet04.xml

<receiver android:name=".WidgetAplicativo"
  android:label="@string/app_name"
  android:icon="@drawable/ic_launcher">
  <intent-filter>
    <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
  </intent-filter>
  <meta-data 
    android:name="android.appwidget.provider"
    android:resource="@xml/provedor_widget" />
</receiver>

snippet05.java

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
    int[] appWidgetIds) {
  ComponentName cn = new ComponentName(context, WidgetApp.class);
  RemoteViews atualizarFrame = new RemoteViews("net.rafaeltoledo.restaurante", R.layout.widget);
  GerenciadorRestaurantes gerenciador = new GerenciadorRestaurantes(context);
 
  try {
    Cursor c = gerenciador.getReadableDatabase().rawQuery("SELECT COUNT(*) FROM restaurantes", null);
    c.moveToFirst();
    int count = c.getInt(0);
    c.close();
 
    if (count > 0) {
      int offset = (int) (count * Math.random());
      String args[] = {String.valueOf(offset)};
      c = gerenciador.getReadableDatabase().rawQuery("SELECT nome FROM restaurantes LIMIT 1 OFFSET ?", args);
      c.moveToFirst();
      atualizarFrame.setTextViewText(R.id.nome, c.getString(0));
    } else {
      atualizarFrame.setTextViewText(R.id.nome, context.getString(R.string.vazio));
    }
  } finally {
    gerenciador.close();
  }
 
  appWidgetManager.updateAppWidget(cn, atualizarFrame);
}

snippet06.xml

<string name="vazio">Nenhum registro.</string>

snippet07.xml

<string name="vazio">Ningún registro.</string>