Question

In my app I am getting database is locked.

I tried using solutions provided in other posts but could not found suitable solution this is why I am posting this question.

Here is the onCreate

DBAdapter db = new DBAdapter(this.getApplicationContext());
        dialoge = new Progress_Dialog(this);
        dialoge.setCancelable(false);
        try {
            db.createDataBase();
        } catch (IOException e) {
            e.printStackTrace();
        }

and here is the create database method

public void createDataBase() throws IOException{     
            boolean dbExist = checkDataBase();     
            if(!dbExist){
                this.getReadableDatabase();     
                try {     
                    copyDataBase();
                } catch (IOException e) {     
                    e.printStackTrace();
                    throw new Error("Error copying database");     
                }
            }
        }

and below is the checkdatabase method

 private boolean checkDataBase(){     
            SQLiteDatabase checkDB = null;
            try{
                String myPath = DB_PATH + DB_NAME;

                String myPath2 = DB_PATH + DB_NAME2;

                checkDB = SQLiteDatabase.openDatabase(myPath, null, 
                        SQLiteDatabase.OPEN_READWRITE);

                if(checkDB != null){
                    checkDB.close();

                }
                checkDB = SQLiteDatabase.openDatabase(myPath2, null, 
                        SQLiteDatabase.OPEN_READWRITE);

            }catch(SQLiteException e){
        //      e.printStackTrace();
                //database does't exist yet.
                System.out.print("SQLiteException   "+e.toString());
            }
            if(checkDB != null){
                checkDB.close();

            }
            return checkDB != null ? true : false;
        }

Please help me in this.

Answer 1

The “locking” is occurring because you are attempting to open multiple SQLiteDatabase instances. Make your SQLiteDatabase a singleton as described in this post.