| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.android.weatherlistwidget; |
| |
| import android.appwidget.AppWidgetManager; |
| import android.appwidget.AppWidgetProvider; |
| import android.content.ContentProvider; |
| import android.content.ContentValues; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.res.Resources; |
| import android.database.Cursor; |
| import android.database.MatrixCursor; |
| import android.net.Uri; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * A placeholder class that we are going to use internally to store weather data. Generally, this data |
| * will be stored in an external and persistent location (ie. File, Database, SharedPreferences) so |
| * that the data can persist if the process is ever killed. For simplicity, in this sample the |
| * data will only be stored in memory. |
| */ |
| class WeatherDataPoint { |
| String day; |
| int degrees; |
| |
| WeatherDataPoint(String d, int deg) { |
| day = d; |
| degrees = deg; |
| } |
| } |
| |
| /** |
| * The AppWidgetProvider for our sample weather widget. |
| */ |
| public class WeatherDataProvider extends ContentProvider { |
| public static final Uri CONTENT_URI = |
| Uri.parse("content://com.example.android.weatherlistwidget.provider"); |
| public static class Columns { |
| public static final String ID = "_id"; |
| public static final String DAY = "day"; |
| public static final String TEMPERATURE = "temperature"; |
| } |
| |
| /** |
| * Generally, this data will be stored in an external and persistent location (ie. File, |
| * Database, SharedPreferences) so that the data can persist if the process is ever killed. |
| * For simplicity, in this sample the data will only be stored in memory. |
| */ |
| private static final ArrayList<WeatherDataPoint> sData = new ArrayList<WeatherDataPoint>(); |
| |
| @Override |
| public boolean onCreate() { |
| // We are going to initialize the data provider with some default values |
| sData.add(new WeatherDataPoint("Monday", 13)); |
| sData.add(new WeatherDataPoint("Tuesday", 1)); |
| sData.add(new WeatherDataPoint("Wednesday", 7)); |
| sData.add(new WeatherDataPoint("Thursday", 4)); |
| sData.add(new WeatherDataPoint("Friday", 22)); |
| sData.add(new WeatherDataPoint("Saturday", -10)); |
| sData.add(new WeatherDataPoint("Sunday", -13)); |
| sData.add(new WeatherDataPoint("Monday", 8)); |
| sData.add(new WeatherDataPoint("Tuesday", 11)); |
| sData.add(new WeatherDataPoint("Wednesday", -1)); |
| sData.add(new WeatherDataPoint("Thursday", 27)); |
| sData.add(new WeatherDataPoint("Friday", 27)); |
| sData.add(new WeatherDataPoint("Saturday", 27)); |
| sData.add(new WeatherDataPoint("Sunday", 27)); |
| return true; |
| } |
| |
| @Override |
| public synchronized Cursor query(Uri uri, String[] projection, String selection, |
| String[] selectionArgs, String sortOrder) { |
| assert(uri.getPathSegments().isEmpty()); |
| |
| // In this sample, we only query without any parameters, so we can just return a cursor to |
| // all the weather data. |
| final MatrixCursor c = new MatrixCursor( |
| new String[]{ Columns.ID, Columns.DAY, Columns.TEMPERATURE }); |
| for (int i = 0; i < sData.size(); ++i) { |
| final WeatherDataPoint data = sData.get(i); |
| c.addRow(new Object[]{ new Integer(i), data.day, new Integer(data.degrees) }); |
| } |
| return c; |
| } |
| |
| @Override |
| public String getType(Uri uri) { |
| return "vnd.android.cursor.dir/vnd.weatherlistwidget.temperature"; |
| } |
| |
| @Override |
| public Uri insert(Uri uri, ContentValues values) { |
| // This example code does not support inserting |
| return null; |
| } |
| |
| @Override |
| public int delete(Uri uri, String selection, String[] selectionArgs) { |
| // This example code does not support deleting |
| return 0; |
| } |
| |
| @Override |
| public synchronized int update(Uri uri, ContentValues values, String selection, |
| String[] selectionArgs) { |
| assert(uri.getPathSegments().size() == 1); |
| |
| // In this sample, we only update the content provider individually for each row with new |
| // temperature values. |
| final int index = Integer.parseInt(uri.getPathSegments().get(0)); |
| final MatrixCursor c = new MatrixCursor( |
| new String[]{ Columns.ID, Columns.DAY, Columns.TEMPERATURE }); |
| assert(0 <= index && index < sData.size()); |
| final WeatherDataPoint data = sData.get(index); |
| data.degrees = values.getAsInteger(Columns.TEMPERATURE); |
| |
| // Notify any listeners that the data backing the content provider has changed, and return |
| // the number of rows affected. |
| getContext().getContentResolver().notifyChange(uri, null); |
| return 1; |
| } |
| |
| } |