Dynamically add items in list view

Question

I want to make a dynamic list view which gets the user credentials when I login for the first time and displays it in a list the next time I start the app. I know how to sen

Answer 1

You can try out this code to add elements dynamically to list view. You can do it with out button click also.

import java.util.ArrayList;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends Activity {
    //step2 : create all the variables.
    EditText et;
    Button b;
    ListView lv;
    ArrayList al;
    ArrayAdapter aa;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //step3 : intitalize all the variables.
        et = (EditText) findViewById(R.id.editText1);
        b = (Button) findViewById(R.id.button1);
        lv = (ListView) findViewById(R.id.listView1);
        al = new ArrayList();//initialize array list
        aa = new ArrayAdapter(this, 
                android.R.layout.simple_list_item_1, 
                al);//step4 : establish communication bw arraylist and adapter
        //step5 : establish communication bw adapter and dest (listview)
        lv.setAdapter(aa);
        lv.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView parent, 
                    View v, int arg2,
                    long arg3) {
                String item = al.get(arg2);
                Toast.makeText(getApplicationContext(), item, 0).show();
            }
        });
        //step6 : button click logic
        b.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                //step i: take text from et and add to arraylist
                String item = et.getText().toString();
                al.add(0, item);
                //step ii: notify to adapter
                aa.notifyDataSetChanged();
                //step iii: clr edit text
                et.setText("");
            }
        });
    }
}

For complete code check this list view example