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PODisplay primary key in the SQlite database when selecting item in Spinner
 

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  1. PODisplay primary key in the SQlite database when selecting item in Spinner
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    <p>I am trying to display the primary key of the item I selected in Spinner.I want to display the primary key in TextView.How will I do this?I already know how to display a field in a table in database.</p> <p>In my DatabseHandler.java This is how I insert data in my table criteria</p> <pre><code>public long insertLabelCriteria(String label, String label2, String label3){ SQLiteDatabase db = this.getWritableDatabase(); ContentValues values = new ContentValues(); values.put(KEY_CRI_NAME, label); values.put(KEY_CRI_PER, label2); values.put(KEY_CRI_EVPK, label3); // Inserting Row long id = db.insert(TABLE_CRITERIA, null, values); db.close(); // Closing database connection return id; } </code></pre> <p>This is my method in getting labels and returning list of labels</p> <pre><code>public List&lt;Criteria&gt; getAllLabels( String evpk ){ List&lt;Criteria&gt; labels = new ArrayList&lt;Criteria&gt;(); SQLiteDatabase db = this.getReadableDatabase(); String selectQuery = "SELECT * FROM " + TABLE_CRITERIA + " WHERE " + KEY_CRI_EVPK + " = " + evpk ; Cursor cursor = db.rawQuery(selectQuery, null); // looping through all rows and adding to list if (cursor.moveToFirst()) { do { labels.add(new Criteria(cursor.getString(1))); } while (cursor.moveToNext()); } // closing connection cursor.close(); db.close(); // returning lables return labels; </code></pre> <p>}</p> <p>In my MainActivity</p> <p>I have a method loadSpinnerData and I use this evrytime I add a criteria, it will load the Spinner to view the item I added in database</p> <pre><code>private void loadSpinnerData() { // TODO Auto-generated method stub // database handler DatabaseHandler db = new DatabaseHandler(getApplicationContext()); // Spinner Drop down elements List&lt;Criteria&gt; lables = db.getAllLabels(evpk.getText().toString()); // Creating adapter for spinner ArrayAdapter&lt;Criteria&gt; dataAdapter = new ArrayAdapter&lt;Criteria&gt; (this, android.R.layout.simple_spinner_dropdown_item, lables); // Drop down layout style - list view with radio button dataAdapter .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // attaching data adapter to spinner criteria_spin.setAdapter(dataAdapter); criteria_spin.setOnItemSelectedListener(this); } </code></pre> <p>Now, on selecting item, how can I display the primary key of the selected item in spinner? This codes below are just to show and select the item click.</p> <pre><code> @Override public void onItemSelected(AdapterView&lt;?&gt; parent, View view, int position, long id) { // On selecting a spinner item String label = parent.getItemAtPosition(position).toString(); // Showing selected spinner item Toast.makeText(parent.getContext(), "You selected: " + label, Toast.LENGTH_LONG).show(); } </code></pre> <p>I also try to add this code ,but the id display is arraylist number, not the primary key</p> <pre><code> long rowId = id; String criteriapk = String.valueOf(label); cripk.setText(criteriapk); </code></pre> <p>I find it hard, in finding solution with this.What will I do?Help me plss</p> <p>I also try this method, but the value is cursor.in the TextView, it does not display number.</p> <pre><code>public Cursor find_id_of_criteria(String label){ SQLiteDatabase db=this.getWritableDatabase(); String selectQuery = "SELECT criteria_id FROM Criteria WHERE criteria_name = "+"'" + label +"'"; Cursor id = db.rawQuery(selectQuery, null); db.close(); return id; </code></pre> <p>}</p> <p>and in loadSpinnerdata I put this</p> <pre><code>//display id of criteria Cursor id2 = db.find_id_of_criteria(label); String cri =(String.valueOf(id2).toString()); cripk.setText(cri); </code></pre>
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    1. USNica Santos
    1. USNica Santos
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. COThe naive way is to query the DB with selected item's value (assuming it's unique and always returns 1 item) and get the primary key. The best way is to implement your custom adapter, as answered by AlexS.
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      1. PODisplay primary key in the SQlite database when selecting item in Spinner
      1. USAndrew T.
    2. COi added new codes above, i hope you can help me. Is their anyway to convert cursor to long?or string?
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      1. PODisplay primary key in the SQlite database when selecting item in Spinner
      1. USNica Santos
    3. COIf you do this way, then put your snippet `//display id of criteria` inside `onItemSelected()`. Then use `long id = id2.getLong(0);` to get the id. Be careful to `setText()` with number, as it will refer to String resource instead.
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      1. PODisplay primary key in the SQlite database when selecting item in Spinner
      1. USAndrew T.
 

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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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