android studio cant open .sqlite database file

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Question:
I’m currently building my first app using android studio that accesses an external database. However the app is crashing and giving errors saying the database can not be opened. I’ve followed videos on youtube but i still have the problem.

When I copy my database .sqlite file from my desktop and paste it into the assets folder I get an error "File was loaded in the wrong encoding: UTF-8". I tried reloading the file in several encodings but I would always get the same error message. I’m guessing this is the issue.

Any other tips or notes are also welcome and appreciated.
public class DataBaseHelper extends SQLiteOpenHelper {
//The Android’s default system path of your application database.
private static String DB_PATH = "/data/data/invain3219/databases/";
private static String DB_NAME = "partyprobeDB.sqlite";
private SQLiteDatabase myDataBase;
private final Context myContext;
/**
* Constructor
* Takes and keeps a reference of the passed context in order to access to the application assets and resources.
* @param context
*/
public DataBaseHelper(Context context) {
super(context, DB_NAME, null, 1);
this.myContext = context;
}

/**
* Creates a empty database on the system and rewrites it with your own database.
* */
public void createDataBase() throws IOException {
boolean dbExist = checkDataBase();

if(dbExist){
//do nothing – database already exist
}else{
//By calling this method and empty database will be created into the default system path
//of your application so we are gonna be able to overwrite that database with our database.
this.getReadableDatabase();

try {
copyDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}

/**
* Check if the database already exist to avoid re-copying the file each time you open the application.
* @return true if it exists, false if it doesn’t
*/
private boolean checkDataBase(){
SQLiteDatabase checkDB = null;

try{
String myPath = DB_PATH + DB_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;
}

/**
* Copies your database from your local assets-folder to the just created empty database in the
* system folder, from where it can be accessed and handled.
* This is done by transfering bytestream.
* */
private void copyDataBase() throws IOException{
//Open your local db as the input stream
InputStream myInput = myContext.getAssets().open(DB_NAME);

// Path to the just created empty db
String outFileName = DB_PATH + DB_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 + DB_NAME;
myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
}

@Override
public synchronized void close() {
if(myDataBase != null)
myDataBase.close();

super.close();
}

@Override
public void onCreate(SQLiteDatabase db) {

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

}

// Add your public helper methods to access and get content from the database.
// You could return cursors by doing "return myDataBase.query(….)" so it’d be easy
// to you to create adapters for your views.

}


Answer:
id is int so change like below is enough , you don’t need like this " WHERE " + TableInfo.INFO_USER + " = ‘" + id + "’;"
int id = curs.getInt(0);

curs = db.rawQuery("SELECT * FROM " + TableInfo.TABLE_USER_INFO +
" WHERE " + TableInfo.INFO_USER + " = " + id, null);
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