Android 天气预报加widget源码.zip

/* * Copyright (C) 2009 Jeff Sharkey, http://jsharkey.org/ * * 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 org.jsharkey.sky; import android.appwidget.AppWidgetManager; import android.content.ContentProvider; import android.content.ContentResolver; import android.content.ContentUris; import android.content.ContentValues; import android.content.Context; import android.content.UriMatcher; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import android.database.sqlite.SQLiteQueryBuilder; import android.net.Uri; import android.provider.BaseColumns; import android.util.Log; /** * Provider that holds widget configuration details, and any cached forecast * data. Provides easy {@link ContentResolver} access to the data when building * widget updates or showing detailed lists. */ public class ForecastProvider extends ContentProvider { private static final String TAG = "ForecastProvider"; private static final boolean LOGD = true; public static final String AUTHORITY = "org.jsharkey.sky"; public interface AppWidgetsColumns { /** * Title given by user to this widget, usually shown in medium widgets * and details title bar. */ public static final String TITLE = "title"; public static final String LAT = "lat"; public static final String LON = "lon"; /** * Temperature units to use when displaying forecasts for this widget, * usually defaults to {@link #UNITS_FAHRENHEIT}. */ public static final String UNITS = "units"; public static final int UNITS_FAHRENHEIT = 1; public static final int UNITS_CELSIUS = 2; /** * Last system time when forecasts for this widget were updated, usually * as read from {@link System#currentTimeMillis()}. */ public static final String LAST_UPDATED = "lastUpdated"; /** * Country code where this widget exists, such as US or FR. This code is * used when updating forecasts to use the best-available data source. */ public static final String COUNTRY_CODE = "countryCode"; /** * If known, the nearest METAR station to this location. The METAR data * is used as a fall-back when no better forecast data is available. */ public static final String METAR_STATION = "metarStation"; /** * Flag specifying if this widget has been configured yet, used to skip * building widget updates. */ public static final String CONFIGURED = "configured"; public static final int CONFIGURED_TRUE = 1; } public static class AppWidgets implements BaseColumns, AppWidgetsColumns { public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/appwidgets"); /** * Directory twig to request all forecasts for a specific widget. */ public static final String TWIG_FORECASTS = "forecasts"; /** * Directory twig to request the forecast nearest the requested time. */ public static final String TWIG_FORECAST_AT = "forecast_at"; public static final String CONTENT_TYPE = "vnd.android.cursor.dir/appwidget"; public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/appwidget"; } public interface ForecastsColumns { /** * The parent {@link AppWidgetManager#EXTRA_APPWIDGET_ID} of this * forecast. */ public static final String APPWIDGET_ID = "widgetId"; /** * Flag if this forecast is an alert. */ public static final String ALERT = "alert"; public static final int ALERT_TRUE = 1; /** * Timestamp when this forecast becomes valid, in base ready for * comparison with {@link System#currentTimeMillis()}. */ public static final String VALID_START = "validStart"; /** * High temperature during this forecast period, stored in Fahrenheit. */ public static final String TEMP_HIGH = "tempHigh"; /** * Low temperature during this forecast period, stored in Fahrenheit. */ public static final String TEMP_LOW = "tempLow"; /** * String describing the weather conditions. */ public static final String CONDITIONS = "conditions"; /** * Web link where more details can be found about this forecast. */ public static final String URL = "url"; } public static class Forecasts implements BaseColumns, ForecastsColumns { public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/forecasts"); public static final String CONTENT_TYPE = "vnd.android.cursor.dir/forecast"; public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/forecast"; } private static final String TABLE_APPWIDGETS = "appwidgets"; private static final String TABLE_FORECASTS = "forecasts"; private DatabaseHelper mOpenHelper; /** * Helper to manage upgrading between versions of the forecast database. */ private static class DatabaseHelper extends SQLiteOpenHelper { private static final String DATABASE_NAME = "forecasts.db"; private static final int VER_ORIGINAL = 2; private static final int VER_ADD_METAR = 3; private static final int DATABASE_VERSION = VER_ADD_METAR; public DatabaseHelper(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); } @Override public void onCreate(SQLiteDatabase db) { db.execSQL("CREATE TABLE " + TABLE_APPWIDGETS + " (" + BaseColumns._ID + " INTEGER PRIMARY KEY," + AppWidgetsColumns.TITLE + " TEXT," + AppWidgetsColumns.LAT + " REAL," + AppWidgetsColumns.LON + " REAL," + AppWidgetsColumns.UNITS + " INTEGER," + AppWidgetsColumns.LAST_UPDATED + " INTEGER," + AppWidgetsColumns.COUNTRY_CODE + " TEXT," + AppWidgetsColumns.CONFIGURED + " INTEGER);"); db.execSQL("CREATE TABLE " + TABLE_FORECASTS + " (" + BaseColumns._ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + ForecastsColumns.APPWIDGET_ID + " INTEGER," + ForecastsColumns.ALERT + " INTEGER DEFAULT 0," + ForecastsColumns.VALID_START + " INTEGER," + ForecastsColumns.TEMP_HIGH + " INTEGER," + ForecastsColumns.TEMP_LOW + " INTEGER," + ForecastsColumns.CONDITIONS + " TEXT," + ForecastsColumns.URL + " TEXT);"); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { int version = oldVersion; switch (version) { case VER_ORIGINAL: db.execSQL("ALTER TABLE " + TABLE_APPWIDGETS + " ADD COLUMN " + AppWidgetsColumns.COUNTRY_CODE + " TEXT"); db.execSQL("ALTER TABLE " + TABLE_APPWIDGETS + " ADD COLUMN " + AppWidgetsColumns.METAR_STATION + " TEXT"