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

For this Just use the example given below: For Instance you are Adding Some Strings into your List

So Create a ListArray like this

ArrayList<String> listItems = new ArrayList<String>();

now whenever you want to add certain string into list just do this thing

  EditText editText = (EditText) findViewById(R.id.edit);
  listItems.add("my string");  OR
  listItems.add(editText.getText.toString()); //incase if you are getting string value from editText and adding it into the list

Use this Xml inside your linear layout in main.xml

  <EditText android:id="@+id/edit"
     android:layout_width="fill_parent"
    android:layout_height="wrap_content"/>

Now when you have added one item dynamically then call this

  adapter.notifyDataSetChanged();

The above will update your list and display the upadted list.

For more info about this see the following links:

http://www.androidpeople.com/android-custom-listview-tutorial-part-1
http://www.androidpeople.com/android-custom-listview-tutorial-part-2
http://www.androidpeople.com/android-custom-dynamic-listview-%E2%80%93part3

In these tutorials you can replace String[] with ArrayList as given at the top of the answer ook and when you want to add any item just simply use the second code snippet.

Thanks
sHaH

Answer 2

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<string> al;
    ArrayAdapter<string> 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<string>();//initialize array list
        aa = new ArrayAdapter<string>(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

Answer 3

The best way to do this will be to use ArrayAdapter. When modifying the adapter it automatically refresh itself so you don't have to call notifyDataSetChanged.