Listview aus Datenbank

package at.android.twhk;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.SQLException;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;


public class DataBaseHelper extends SQLiteOpenHelper{
 
    
    //The Android's default system path of your application database.
    private static String DB_PATH = "/data/data/at.android.twhk/databases/";
    private static String DB_NAME = "twhk_android_sqlite";
    public static final String KEY_TITLE = "firstname";

    

 
    private SQLiteDatabase myDataBase; 
 
    private final Context myContext;
     
    /**
     * Constructor
     * Takes and keeps a reference of the passed context in order to access to the application assets and resources.
     * @param context
     */
    public DataBaseHelper(Context context) {
 
        super(context, DB_NAME, null, 1);
        this.myContext = context;
    }    
 
  /**
     * Creates a empty database on the system and rewrites it with your own database.
     * */
    public void createDataBase() throws IOException{
 
        boolean dbExist = checkDataBase();
 
        if(dbExist){
            //do nothing - database already exist
        }else{
 
            //By calling this method and empty database will be created into the default system path
               //of your application so we are gonna be able to overwrite that database with our database.
            this.getReadableDatabase();
 
            try {
 
                copyDataBase();
 
            } catch (IOException e) {
 
                throw new Error("Error copying database");
 
            }
        }
 
    }
 
    /**
     * Check if the database already exist to avoid re-copying the file each time you open the application.
     * @return true if it exists, false if it doesn't
     */
    private boolean checkDataBase(){
 
        SQLiteDatabase checkDB = null;
 
        try{
            String myPath = DB_PATH + DB_NAME;
            checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
 
        }catch(SQLiteException e){
 
            //database does't exist yet.
 
        }
 
        if(checkDB != null){
 
            checkDB.close();
 
        }
 
        return checkDB != null ? true : false;
    }
 
    /**
     * Copies your database from your local assets-folder to the just created empty database in the
     * system folder, from where it can be accessed and handled.
     * This is done by transfering bytestream.
     * */
    private void copyDataBase() throws IOException{
 
        //Open your local db as the input stream
        InputStream myInput = myContext.getAssets().open(DB_NAME);
 
        // Path to the just created empty db
        String outFileName = DB_PATH + DB_NAME;
 
        //Open the empty db as the output stream
        OutputStream myOutput = new FileOutputStream(outFileName);
 
        //transfer bytes from the inputfile to the outputfile
        byte[] buffer = new byte[1024];
        int length;
        while ((length = myInput.read(buffer))>0){
            myOutput.write(buffer, 0, length);
        }
 
        //Close the streams
        myOutput.flush();
        myOutput.close();
        myInput.close();
 
    }
 
    public void openDataBase() throws SQLException{
 
        //Open the database
        String myPath = DB_PATH + DB_NAME;
        myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
 
    }
    
    
    public synchronized void close1() {
 
            if(myDataBase != null)
                myDataBase.close();
 
            super.close();
 
    }

    @Override
    public void onCreate(SQLiteDatabase arg0) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // TODO Auto-generated method stub
        
    }

    
        public void open() {
        // TODO Auto-generated method stub    

        }
    
    
    
    // Add your public helper methods to access and get content from the database.
   // You could return cursors by doing "return myDataBase.query(....)" so it'd be easy
   // to you to create adapters for your views.
    


    public Cursor fetchAllNotes() {

        return myDataBase.query("twhk_inn_utf8", new String [] {"innname"}, "districtID = ?", new String[]{"1"}, null, null, null, null);




        
    }}

package at.android.twhk;

import android.app.ListActivity;
import android.database.Cursor;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.SimpleCursorAdapter;

public class ListAdapter extends ListActivity {
    public static final int INSERT_ID = Menu.FIRST;
    
    private int mNoteNumber = 1;
    private DataBaseHelper mDbHelper;
    
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list_betriebe_landeck);
        mDbHelper = new DataBaseHelper(this);
        mDbHelper.open();
        fillData();
    }

   
    private void fillData() {
        // Get all of the notes from the database and create the item list
        Cursor c = mDbHelper.fetchAllNotes();
        startManagingCursor(c);

        String[] from = new String[] { DataBaseHelper.KEY_TITLE };
        int[] to = new int[] { R.id.text1 };
        
        // Now create an array adapter and set it to display using our row
        SimpleCursorAdapter notes =
            new SimpleCursorAdapter(this, R.layout.notes_row, c, from, to);
        setListAdapter(notes);
    }
}