I made a big proyect for Android using a prepopulated SQLite Database and it was working perfectly. Now I'm trying to reuse it but It doesn't work on Android 6.0+ Devices, on older android versions it's still working. Problem is everytime I try to access the data, the database is empty. I was trying stuff and I made the most simple app I could think of.
I've been trying to change "/data/data/..../database" for any method to get a proper location but there is no way to make it work. Maybe I need special permisions to make it work in 6.0+ Android or something like that? Any help? Thanks!!
public class MainActivity extends AppCompatActivity {
private DataBaseHelper dbHelper;
TextView textView1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView1 = findViewById(R.id.textViewText);
databaseConexion();
textView1.setText(dbHelper.getAll());
}
private void databaseConexion()
{
dbHelper = new DataBaseHelper(this);
try {
dbHelper.createDataBase();
} catch (IOException ioe) {
throw new Error("Unable to create database");
}
}
}
public class DataBaseHelper extends SQLiteOpenHelper {
private static String DB_PATH = "/data/data/enkend.apps.proyects.pogo.sqlitetest/databases/";
private static String DB_NAME = "Test.db";
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;
}
public void createDataBase() throws IOException {
myContext.deleteDatabase(DB_NAME);
boolean dbExist = checkDataBase();
if (!dbExist) {
this.getReadableDatabase();
try {
copyDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
private boolean checkDataBase() {
File databasePath = myContext.getDatabasePath(DB_NAME);
return databasePath.exists();
}
private void copyDataBase() throws IOException {
InputStream myInput = myContext.getAssets().open(DB_NAME);
String outFileName = DB_PATH + DB_NAME;
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();
}
@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) {
}
public String getAll()
{
String str= "";
// Select All Query
String selectQuery = "SELECT Name FROM Fortnight ORDER BY Name";
SQLiteDatabase db = this.getReadableDatabase();
try {
Cursor cursor = db.rawQuery(selectQuery, null);
try {
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
//int i = 0;
do {
return cursor.getString(0);
} while (cursor.moveToNext());
}
} finally {
try { cursor.close(); } catch (Exception ignore) {}
}
} finally {
try { db.close(); } catch (Exception ignore) {}
}
return str;
}
