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Code Issues Releases Wiki Activity

Add the Location Database Helper

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Not yet tested, but most functionality is done.
This commit is contained in:
Bradlee Speice 2014-04-15 21:37:00 -04:00
parent e398045a18
commit d701c2bcb2
2 changed files with 117 additions and 2 deletions
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108
UNCCScavenger/src/edu/uncc/scavenger/database/LocationDatabaseHelper.java Normal file
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@ -0,0 +1,108 @@
package edu.uncc.scavenger.database;
// Design pattern from: http://www.androiddesignpatterns.com/2012/05/correctly-managing-your-sqlite-database.html
import java.util.ArrayList;
import edu.uncc.scavenger.rest.RestLocation;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteStatement;
public class LocationDatabaseHelper extends SQLiteOpenHelper {
private static LocationDatabaseHelper helper;
private static final String DATABASE_NAME = "locations.db";
private static final String TABLE_NAME = "LOCATIONS";
private static final int DATABASE_VERSION = 1;
private static final String KEY_ID = "ID";
private static final String KEY_NAME = "NAME";
private static final String KEY_RIDDLE = "RIDDLE";
private static final String KEY_LOCATION_LONG = "LOCATION_LONG";
private static final String KEY_LOCATION_LAT = "LOCATION_LAT";
private static final String KEY_KEY = "KEY";
private LocationDatabaseHelper(Context ctx) {
super(ctx, DATABASE_NAME, null, DATABASE_VERSION);
}
public LocationDatabaseHelper getInstance(Context ctx) {
if (helper == null) {
helper = new LocationDatabaseHelper(ctx.getApplicationContext());
}
return helper;
}
private static final String CREATE_QUERY =
"CREATE TABLE " + TABLE_NAME + "(" +
KEY_ID + " int PRIMARY KEY," +
KEY_NAME + " VARCHAR(255)," +
KEY_RIDDLE + " VARCHAR(1024)," +
KEY_LOCATION_LONG + " REAL," +
KEY_LOCATION_LAT + " REAL" +
KEY_KEY + " VARCHAR(255)" +
");";
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATE_QUERY);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
return;
}
public RestLocation locationFromCursor(Cursor c) {
RestLocation location = null;
if (c != null) {
location = new RestLocation();
location.setId(c.getInt(0));
location.setName(c.getString(1));
location.setRiddle(c.getString(2));
location.setLocationLong(c.getDouble(3));
location.setLocationLat(c.getDouble(4));
location.setKey(c.getString(5));
}
return location;
}
public ArrayList<RestLocation> fetchAll() {
ArrayList<RestLocation> results = new ArrayList<RestLocation>();
SQLiteDatabase db = helper.getReadableDatabase();
Cursor c = db.query(TABLE_NAME, new String[]{KEY_ID, KEY_NAME, KEY_RIDDLE, KEY_LOCATION_LONG,
KEY_LOCATION_LAT, KEY_KEY},
null, null, null, null, null);
if (c != null && c.getCount() > 0) {
c.moveToFirst();
do {
RestLocation loc = locationFromCursor(c);
if (loc != null) {
results.add(loc);
}
} while (c.moveToNext());
}
return results;
}
public void persist(RestLocation loc) {
ContentValues values = new ContentValues();
values.put(KEY_ID, loc.getId());
values.put(KEY_NAME, loc.getName());
values.put(KEY_RIDDLE, loc.getRiddle());
values.put(KEY_LOCATION_LONG, loc.getLocationLong());
values.put(KEY_LOCATION_LAT, loc.getLocationLat());
values.put(KEY_KEY, loc.getKey());
helper.getWritableDatabase().insert(TABLE_NAME, null, values);
}
}

11
UNCCScavenger/src/edu/uncc/scavenger/rest/RestLocation.java
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@ -9,6 +9,7 @@ public class RestLocation {
private String riddle;
private double locationLong;
private double locationLat;
private String key;
public int getId() {
return id;
@ -40,14 +41,20 @@ public class RestLocation {
public void setLocationLat(double locationLat) {
this.locationLat = locationLat;
}
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
public Location getLocation() {
android.location.Location mLocation = new android.location.Location("NinerFinderServer");
mLocation.setLatitude(getLocationLat());
mLocation.setLongitude(getLocationLong());
return mLocation;
}
public float bearingTo(RestLocation target) {
return getLocation().bearingTo(target.getLocation());
}