Я следовал руководству, где мне нужно подключить базу данных SQLite к затмению.Но каким-то образом я всегда получаю эту ошибку, и у меня была эта ошибка, но в ней все еще была ошибка?
public Restaurant open() throws SQLException
{
ourHelper = new DBHelper(this);
это ссылка, по которой я перешел: http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/
public class Restaurant {
public static final String KEY_ROWID = "_id";
public static final String KEY_NAME = "name";
public static final String KEY_DETAIL = "detail";
public static final String KEY_PRICE = "price";
private static final String DATABASE_NAME ="Restaurantdb";
private static final String DATABASE_TABLE ="Food";
private static final int DATABASE_VERSION = 1;
private static String DB_PATH = "/data/data/com.restaurant.sesame/databases/";
private static SQLiteDatabase ourDatabase;
private final Context ourContext;
private DBHelper ourHelper;
public class DBHelper extends SQLiteOpenHelper{
private final Context myContext;
public DBHelper(Context context) {
super(context, DATABASE_NAME, null, 1);
this.myContext = context;
}
public void createDataBase() throws IOException{
boolean dbExist = checkDataBase();
if(dbExist){
//do nothing - database already exist
}else{
this.getReadableDatabase();
try {
copyDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
private boolean checkDataBase(){
SQLiteDatabase checkDB = null;
try{
String myPath = DB_PATH + DATABASE_NAME;
checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
}catch(SQLiteException e){
//database does't exist yet.
}
if(checkDB != null){
checkDB.close();
}
return checkDB != null ? true : false;
}
private void copyDataBase() throws IOException{
//Open your local db as the input stream
InputStream myInput = myContext.getAssets().open(DATABASE_NAME);
// Path to the just created empty db
String outFileName = DB_PATH + DATABASE_NAME;
//Open the empty db as the output stream
OutputStream myOutput = new FileOutputStream(outFileName);
//transfer bytes from the inputfile to the outputfile
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer))>0){
myOutput.write(buffer, 0, length);
}
//Close the streams
myOutput.flush();
myOutput.close();
myInput.close();
}
public void openDataBase() throws SQLException{
//Open the database
String myPath = DB_PATH + DATABASE_NAME;
ourDatabase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
}
@Override
public synchronized void close() {
if(ourDatabase != null)
ourDatabase.close();
super.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
public Restaurant(Context c)
{
ourContext = c;
}
public Restaurant open() throws SQLException
{
***ourHelper = new DBHelper(this);***
try {
ourHelper.createDataBase();
} catch (IOException ioe) {
throw new Error("Unable to create database");
}
try {
ourHelper.openDataBase();
}catch(SQLException sqle){
throw sqle;
}
return this;
}
public void close()
{
ourHelper.close();
}