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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.example.android.weatherlistwidget;
     18 
     19 import java.util.ArrayList;
     20 import java.util.List;
     21 
     22 import android.appwidget.AppWidgetManager;
     23 import android.content.Context;
     24 import android.content.Intent;
     25 import android.content.ContentUris;
     26 import android.database.Cursor;
     27 import android.net.Uri;
     28 import android.os.Bundle;
     29 import android.widget.RemoteViews;
     30 import android.widget.RemoteViewsService;
     31 
     32 /**
     33  * This is the service that provides the factory to be bound to the collection service.
     34  */
     35 public class WeatherWidgetService extends RemoteViewsService {
     36     @Override
     37     public RemoteViewsFactory onGetViewFactory(Intent intent) {
     38         return new StackRemoteViewsFactory(this.getApplicationContext(), intent);
     39     }
     40 }
     41 
     42 /**
     43  * This is the factory that will provide data to the collection widget.
     44  */
     45 class StackRemoteViewsFactory implements RemoteViewsService.RemoteViewsFactory {
     46     private Context mContext;
     47     private Cursor mCursor;
     48     private int mAppWidgetId;
     49 
     50     public StackRemoteViewsFactory(Context context, Intent intent) {
     51         mContext = context;
     52         mAppWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
     53                 AppWidgetManager.INVALID_APPWIDGET_ID);
     54     }
     55 
     56     public void onCreate() {
     57         // Since we reload the cursor in onDataSetChanged() which gets called immediately after
     58         // onCreate(), we do nothing here.
     59     }
     60 
     61     public void onDestroy() {
     62         if (mCursor != null) {
     63             mCursor.close();
     64         }
     65     }
     66 
     67     public int getCount() {
     68         return mCursor.getCount();
     69     }
     70 
     71     public RemoteViews getViewAt(int position) {
     72         // Get the data for this position from the content provider
     73         String city = "Unknown City";
     74         int temp = 0;
     75         if (mCursor.moveToPosition(position)) {
     76             final int cityColIndex = mCursor.getColumnIndex(WeatherDataProvider.Columns.CITY);
     77             final int tempColIndex = mCursor.getColumnIndex(
     78                     WeatherDataProvider.Columns.TEMPERATURE);
     79             city = mCursor.getString(cityColIndex);
     80             temp = mCursor.getInt(tempColIndex);
     81         }
     82 
     83         // Return a proper item with the proper city and temperature.  Just for fun, we alternate
     84         // the items to make the list easier to read.
     85         final String formatStr = mContext.getResources().getString(R.string.item_format_string);
     86         final int itemId = (position % 2 == 0 ? R.layout.light_widget_item
     87                 : R.layout.dark_widget_item);
     88         RemoteViews rv = new RemoteViews(mContext.getPackageName(), itemId);
     89         rv.setTextViewText(R.id.widget_item, String.format(formatStr, temp, city));
     90 
     91         // Set the click intent so that we can handle it and show a toast message
     92         final Intent fillInIntent = new Intent();
     93         final Bundle extras = new Bundle();
     94         extras.putString(WeatherWidgetProvider.EXTRA_CITY_ID, city);
     95         fillInIntent.putExtras(extras);
     96         rv.setOnClickFillInIntent(R.id.widget_item, fillInIntent);
     97 
     98         return rv;
     99     }
    100     public RemoteViews getLoadingView() {
    101         // We aren't going to return a default loading view in this sample
    102         return null;
    103     }
    104 
    105     public int getViewTypeCount() {
    106         // Technically, we have two types of views (the dark and light background views)
    107         return 2;
    108     }
    109 
    110     public long getItemId(int position) {
    111         return position;
    112     }
    113 
    114     public boolean hasStableIds() {
    115         return true;
    116     }
    117 
    118     public void onDataSetChanged() {
    119         // Refresh the cursor
    120         if (mCursor != null) {
    121             mCursor.close();
    122         }
    123         mCursor = mContext.getContentResolver().query(WeatherDataProvider.CONTENT_URI, null, null,
    124                 null, null);
    125     }
    126 }
    127