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中打開我已經使用了sqlite數據庫。我能夠在數據庫中插入值,但是當我想從數據庫中檢索值時,它給了我異常數據庫沒有打開。我在這裏附上我的代碼。Sqlite數據庫無法在我的應用程序中的Android
db = openOrCreateDatabase("TaskTower.db", SQLiteDatabase.CREATE_IF_NECESSARY, null);
try{
/*db = openOrCreateDatabase("TaskTower.db", SQLiteDatabase.CREATE_IF_NECESSARY, null);
db.setVersion(1);
db.setLocale(Locale.getDefault());
db.setLockingEnabled(true);*/
//db.execSQL("SELECT * FROM dummytt1");
Cursor cur = db.query("dummyTT1",
null, null, null, null, null, null);
cur.moveToFirst();
while (cur.isAfterLast() == false){
ans[i] = new String();
ans[i] = "";
ans[i] = cur.getString(1)+"~"+cur.getString(2);
System.out.println("The Offline Data is :"+ans[i]);
i++;
cur.moveToNext();
}
cur.close();
}
catch (Exception e) {
System.out.println("The Error Caused Is :"+e);
}
return ans;
但我還沒有創建DBHelper文件。 – Kushal
然後創建它 – Jyosna
是否強制? – Kushal