Question

I want to populate a list from my database.

I have the following code:

setContentView(R.layout.pro);
    addProFromDB();

}

How I should populate the multi xCodexInlinexPlacexHolderx?

private void addProFromDB() {
    // TODO Auto-generated method stub

    ArrayList<String> results = new ArrayList<String>();
    SQLiteDatabase sampleDB = null;

    try {
        list = (ListView)findViewById(android.R.id.list);
        list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        sampleDB = this.openOrCreateDatabase(SAMPLE_DB_NAME, 1, null);
        sampleDB.execSQL("create table tbl_product("
                + "pro_id integer PRIMARY KEY autoincrement,"
                + "pro_name text," + "pro_price integer);");

        sampleDB.execSQL("insert into tbl_product(pro_name, pro_price) values ('oil', '200' );");

        Cursor c = sampleDB.query(SAMPLE_TABLE_NAMES, null, null, null, null, null,
                null);
        char pro_nameColumnIndex = (char) c.getColumnIndexOrThrow("pro_name");
        int pro_priceColumnIndex = (int) c.getColumnIndexOrThrow("pro_price");

    } finally {
        if (sampleDB != null)
        sampleDB.close();
    }
    setListAdapter(new ArrayAdapter<String>(this,
        android.R.layout.simple_list_item_checked, new ArrayList()));

It is not giving any error, but not showing the inserted items either.

Answer 1

Number of issues are there in your code snippet.

1. You are creating table tbl_product every time you run you app.
2. You are inserting new element in your newly created table every time.
3. and finally you are passing empty array to your ArrayAdapter as
   new ArrayList()

I would recommend you to go through any tutorial, and sort out things step by step.

I’m suggesting you to follow this tutorial, and use CursorAdapter when you are working with sqlite.