Android gets rows from sqlite database in autocompletetextview

Question

I am working on a sqlite database project on Android. And this is my first sqlite project. I read many articles and created my application, but there is a problem that I cannot find a way to solve it. I hope you can show me the way. The problem is that when I call activity by pressing the button, the device will launch a message ("unfortunately the application is stopped").

I am trying to get rows from sqlite database in autocompletetextview.

Sqlite Class Database Class Codes

package com.example.matik; import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteDatabase.CursorFactory; import android.database.sqlite.SQLiteOpenHelper; public class Veritabani extends SQLiteOpenHelper { private static final String VERITABANI="KAYISGDATA.db"; private static final int SURUM=1; public static final String TABLE_TODO = "nace"; public static final String COLUMN_ID = "_id"; public static final String COLUMN_CATEGORY = "KOD"; public static final String COLUMN_SUMMARY = "ACK"; public static final String COLUMN_DESCRIPTION = "TEH"; private static final String DB_DROP = "DROP TABLE IF EXISTS nace"; private static final String DATABASE_CREATE = "create table " + TABLE_TODO + "(" + COLUMN_ID + " integer primary key autoincrement, " + COLUMN_CATEGORY + " text not null, " + COLUMN_SUMMARY + " text not null," + COLUMN_DESCRIPTION + " text not null" + ");"; public Veritabani(Context con, String name, CursorFactory factory, int version) { super(con, VERITABANI, null, SURUM); // TODO Auto-generated constructor stub } @Override public void onCreate(SQLiteDatabase db) { // TODO Auto-generated method stub db.execSQL(DATABASE_CREATE); db.execSQL("INSERT INTO nace (KOD,ACK,TEH) VALUES('01.11.07','Baklagillerin yetiştirilmesi','Tehlikeli')");} @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { db.execSQL(DB_DROP); onCreate(db); } } 

Activity Class Codes

 package com.example.matik; import java.util.ArrayList; import android.app.Activity; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.os.Bundle; import android.widget.ArrayAdapter; import android.widget.AutoCompleteTextView; import android.widget.EditText; public class Matik extends Activity { AutoCompleteTextView auto; EditText nc; EditText th; Veritabani VB; private ArrayAdapter<String> arrayAdapter; ArrayList<String> Liste = new ArrayList<String>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_matik); Liste = new ArrayList<String>(); doldur(); nc = (EditText) findViewById(R.id.editText2); th = (EditText) findViewById(R.id.editText3); auto = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1); arrayAdapter = new ArrayAdapter<String>(this,android.R.layout.select_dialog_item, Liste); auto.setThreshold(1); auto.setAdapter(arrayAdapter); } private void doldur() { SQLiteDatabase Db = VB.getReadableDatabase(); Cursor c = Db.rawQuery("Select ACT From nace", null); Db.isOpen(); while(c.moveToNext()){ Liste.add(c.getString(c.getColumnIndex("ACT"))); }; } } 

Answer 1

Use the SimpleCursorAdapter, as shown in this article .

 _descriptionText = (AutoCompleteTextView) findViewById(R.id.description); final int[] to = new int[]{android.R.id.text1}; final String[] from = new String[]{VehicleDescriptionsTable.DESCRIPTION}; SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, android.R.layout.simple_dropdown_item_1line, null, from, to); // This will provide the labels for the choices to be displayed in the AutoCompleteTextView adapter.setCursorToStringConverter(new SimpleCursorAdapter.CursorToStringConverter() { @Override public CharSequence convertToString(Cursor cursor) { final int colIndex = cursor.getColumnIndexOrThrow(VehicleDescriptionsTable.DESCRIPTION); return cursor.getString(colIndex); } }); // This will run a query to find the descriptions for a given vehicle. adapter.setFilterQueryProvider(new FilterQueryProvider() { @Override public Cursor runQuery(CharSequence description) { String vehicle = getSelectedVehicle(); Cursor managedCursor = _helper.getDescriptionsFor(vehicle, description.toString()); Log.d(TAG, "Query has " + managedCursor.getCount() + " rows of description for " + vehicle); return managedCursor; } }); _descriptionText.setAdapter(adapter); 

Here you just need to add a function to return the cursor to your database, and add the adapter to your AutoTextCompleteTextView. You will need to get the _id from your log query, in fact you can just consider getting the whole row ( SELECT * FROM table ). If you don't have a _id column, try SELECT data, rowid AS _id FROM table .