Question

I have jokes.db database. This database file imported from using this article., http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/. Now i have Jokes.db in to /data/data/a.b.c/database/Jokes.db. In this database , I have two table NepaliJokes and EnglishJokes. So Now I want to retrive this nepali and english jokes and display in to textview, But I have done following code but couldnot more idea behind How to retrieve data from database.

public class FunnyJokes extends Activity implements View.OnClickListener {
private SQLiteDatabase database;

@Override
protected void onCreate(Bundle savedInstanceState) {
    Button back;
    super.onCreate(savedInstanceState);
    setContentView(R.layout.displayjoks1);

    back = (Button) findViewById(R.id.back_btn);
    back.setOnClickListener(this);

    DataBaseHelper helper = new DataBaseHelper(this);
    database = helper.getWritableDatabase();
    loadJokes();
}

private void loadJokes() {
     //jok=new ArrayList<String>();
      /*Cursor c = database.query("SELECT title,body" +
                                             " FROM " + 'tableName'
                                             + " WHERE category=1;",
                                             null);*/
     Cursor c = database.query("NepaliJokes", 
                null, null, null, null, null, null);

 c.moveToPosition(0);
 TextView tv= (TextView) findViewById(R.id.textView1);
 tv.append(c.getString(1));
 c.close();
}

@Override
public void onClick(View v) {
    switch (v.getId()) {
    case R.id.back_btn:
        FunnyJokes.this.finish();
        break;

    default:
        break;
    }

}
}

I also use the database file import from in DDMS->fileExploer. I import database file Pull mobile icon from left of file explorer section.

Answer 1

To read values from the table:

1. Create a cursor to read data from the database.

   Write the following function.

   public Cursor retrieveRecords(int category)
   {
     Cursor c = null;
     c = db.rawQuery("select title,body from tablename where category=" +category, null);
    return c;
   }
   

2. Now get the values from the cursor.

   public void getDataFromDatabase()
   {
       try
       {
           Cursor cursor = null;
           db.OpenDatabase();
           cursor = db.retrieveRecords();
           if (cursor.getCount() != 0)
           {
               if (cursor.moveToFirst())
               {
                   do
                   {
                       titleArrayList.add(cursor.getString(cursor.getColumnIndex("title")));
                       bodyArrayList.add(cursor.getString(cursor.getColumnIndex("body")));
                   } while (cursor.moveToNext());
               }
               db.closeDatabase();
           }
           cursor.close();
       }
       catch(Exception e)
       {
           e.printStackTrace();
       }
   }