Android Open Source - Sunshine Weather D B Helper

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License

The source code is released under:

GNU General Public License

Java Source Code

package la.sonny.sunshine.data;
/*w  w  w  .j ava 2  s .co  m*/
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

import la.sonny.sunshine.data.WeatherContract.LocationEntry;
import la.sonny.sunshine.data.WeatherContract.WeatherEntry;

/**
 * Created by sonny on 10/24/14.
 */
public class WeatherDBHelper extends SQLiteOpenHelper {

    private static final int DATABASE_VERSION = 1;
    public static final String DATABASE_NAME = "weather.db";

    public WeatherDBHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase sqLiteDatabase) {

        final String SQL_CREATE_LOCATION_TABLE = "CREATE TABLE " + LocationEntry.TABLE_NAME + " (" +
                LocationEntry._ID + " INTEGER PRIMARY KEY," +
                LocationEntry.COLUMN_LOC_SETTING + " TEXT NOT NULL," +
                LocationEntry.COLUMN_LAT + " REAL NOT NULL," +
                LocationEntry.COLUMN_LONG + " REAL NOT NULL," +
                LocationEntry.COLUMN_CITY_NAME + " TEXT NOT NULL," +
                " UNIQUE (" + LocationEntry.COLUMN_LOC_SETTING + ") ON CONFLICT IGNORE );";

        final String SQL_CREATE_WEATHER_TABLE = "CREATE TABLE " + WeatherEntry.TABLE_NAME + " (" +
                // For weather forecasting, the user will want information for a certain date and
                // all dates following, so the forecast data should be sorted accordingly.
                WeatherEntry._ID + " INTEGER PRIMARY KEY AUTOINCREMENT," +

                // the ID of the location entry associated with this weather data
                WeatherEntry.COLUMN_LOC_KEY + " INTEGER NOT NULL, " +
                WeatherEntry.COLUMN_DATETEXT + " TEXT NOT NULL, " +
                WeatherEntry.COLUMN_SHORT_DESC + " TEXT NOT NULL, " +
                WeatherEntry.COLUMN_WEATHER_ID + " INTEGER NOT NULL," +

                WeatherEntry.COLUMN_MIN_TEMP + " REAL NOT NULL, " +
                WeatherEntry.COLUMN_MAX_TEMP + " REAL NOT NULL, " +

                WeatherEntry.COLUMN_HUMIDITY + " REAL NOT NULL, " +
                WeatherEntry.COLUMN_PRESSURE + " REAL NOT NULL, " +
                WeatherEntry.COLUMN_WIND_SPEED + " REAL NOT NULL, " +
                WeatherEntry.COLUMN_DEGREES + " REAL NOT NULL, " +

                " FOREIGN KEY (" + WeatherEntry.COLUMN_LOC_KEY + ") REFERENCES " +
                LocationEntry.TABLE_NAME + " (" + LocationEntry._ID + "), " +

                // To assure the application have just one weather entry per day
                // per location, it's created a UNIQUE constraint with REPLACE strategy
                " UNIQUE (" + WeatherEntry.COLUMN_DATETEXT + ", " +
                WeatherEntry.COLUMN_LOC_KEY + ") ON CONFLICT REPLACE);";

        sqLiteDatabase.execSQL(SQL_CREATE_LOCATION_TABLE);
        sqLiteDatabase.execSQL(SQL_CREATE_WEATHER_TABLE);
    }

    @Override
    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int oldVersion, int newVersion) {
        sqLiteDatabase.execSQL("DROP TABLE IF EXISTS " + LocationEntry.TABLE_NAME);
        sqLiteDatabase.execSQL("DROP TABLE IF EXISTS " + WeatherEntry.TABLE_NAME);
        onCreate(sqLiteDatabase);
    }
}

Java Source Code List

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