سوال در مورد ارتباط با دیتابیس

 import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class database extends SQLiteOpenHelper{
	private final Context mycontext;
	public final String path="data/data/ir.ayhan.appLed/databases/";
	public final String name="database";
	public SQLiteDatabase mydb;
	public database(Context context) {
		super(context, "database", null, 1);
		// TODO Auto-generated constructor stub
		mycontext=context;
	}



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

	@Override
	public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
		// TODO Auto-generated method stub
		
	}
	public void open(){
		mydb=SQLiteDatabase.openDatabase(path+name, null, SQLiteDatabase.OPEN_READWRITE);
	}
	public void close(){
		mydb.close();
	}
	public void useable(){
		boolean checkdb=checkdb();
		if(checkdb){
			
		}else{
			this.getReadableDatabase();
			try{
				copydatabase();
				
			}catch(IOException e){
				
			}
		}
	}
	public boolean checkdb() {
		SQLiteDatabase db=null;
		try{
		db=SQLiteDatabase.openDatabase(path+name, null, SQLiteDatabase.OPEN_READONLY);
		}catch(SQLException e)
		{
			
		}
		return db !=null ? true:false;
	}
	
	public void copydatabase() throws IOException{

		
		OutputStream myOutput = new FileOutputStream(path+name);
		byte[] buffer = new byte[1024];
		int length;
		InputStream myInput = mycontext.getAssets().open("database");
		while ((length = myInput.read(buffer)) > 0) {
		myOutput.write(buffer,0,length);	
		}
		myInput.close();
		myOutput.flush();
		myOutput.close();
	}