Basic Android Lists

Single item - ArrayAdapter

txtNote = (EditText)findViewById(R.id.txtNote);
btnAdd = (ImageButton)findViewById(R.id.btnAdd);
lstNotes = (ListView)findViewById(R.id.lstNotes);
adapter = new ArrayAdapter(AddNewListOfNotes.this,R.layout.listnotes);
lstNotes.setAdapter(adapter);
btnAdd.setOnClickListener(new View.OnClickListener() {
	public void onClick(View v) {
		adapter.add(txtNote.getText().toString());
	}
});

http://stackoverflow.com/questions/4645854/add-data-from-edittext-to-listview-in-android

on click listeners

lstNotes.setOnItemClickListener(new OnItemClickListener(){
	public void onItemClick(AdapterView parent, View view, int position, long id) {
		Toast.makeText(getApplicationContext(), ((TextView) view).getText(), Toast.LENGTH_SHORT).show();
	}
});

http://www.mkyong.com/android/android-listview-example/

single item – array adapter with complex layout – reference id of textview

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:background="#FFFFFF"  >
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >
        <EditText
            android:id="@+id/txtNote"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1.06"
            android:ems="10" >
            <requestFocus />
        </EditText>
        <ImageButton
            android:id="@+id/btnAdd"
            android:layout_width="47dp"
            android:layout_height="fill_parent"
            android:src="@drawable/ic_menu_add" />
    </LinearLayout>
    <ListView
        android:id="@+id/lstNotes"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >
    </ListView>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal" >
    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ok" />
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >
        <TextView
            android:id="@+id/txtHeading"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Large Text"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:textColor="#090909" />
        <TextView
            android:id="@+id/txtSubHeading"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Small Text"
            android:textAppearance="?android:attr/textAppearanceSmall"
            android:textColor="#090909" />
    </LinearLayout>
</LinearLayout>

package com.example.helloandroid;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ListView;
import android.widget.AdapterView.OnItemClickListener;

public class AddNewListOfNotes extends Activity {
	private EditText txtNote;
	private ImageButton btnAdd;
	private ListView lstNotes;
	private ArrayAdapter adapter;
	@Override
	public void onCreate(Bundle savedInstanceState) {
	    super.onCreate(savedInstanceState);

        setContentView(R.layout.addnewlistofnotes);
		txtNote = (EditText)findViewById(R.id.txtNote);
		btnAdd = (ImageButton)findViewById(R.id.btnAdd);
		lstNotes = (ListView)findViewById(R.id.lstNotes);
		adapter = new ArrayAdapter(AddNewListOfNotes.this,R.layout.listnotes,R.id.txtHeading);
		lstNotes.setAdapter(adapter);

		btnAdd.setOnClickListener(new View.OnClickListener() {

			public void onClick(View v) {
				adapter.add(txtNote.getText().toString());
				txtNote.setText("");
			}
		});
		lstNotes.setOnItemClickListener(new OnItemClickListener(){

			public void onItemClick(AdapterView parent, View view, int position,
					long id) {
				Toast.makeText(getApplicationContext(),
						((TextView)view.findViewById(R.id.txtHeading)).getText(), Toast.LENGTH_SHORT).show();

			}
		});
	}
}

android-listview-example

binding more items

- thanks to vogella.com_tutorial_twolistitems and adapter.notifyDataSetChanged(); from many crazy links which made me pretty scared if I had to code that much!!! but thank god custom adapter was not needed, a simple adapter was enough!

public class AddNewListOfNotes extends Activity {
	private EditText txtNote;
	private ImageButton btnAdd;
	private ListView lstNotes;
	private SimpleAdapter adapter;
	private int count = 1;
	private ArrayList<Map<String, String>> list = new ArrayList<Map<String, String>>();;
	@Override
	public void onCreate(Bundle savedInstanceState) {
	    super.onCreate(savedInstanceState);

        setContentView(R.layout.addnewlistofnotes);
		txtNote = (EditText)findViewById(R.id.txtNote);
		btnAdd = (ImageButton)findViewById(R.id.btnAdd);
		lstNotes = (ListView)findViewById(R.id.lstNotes);
		String[] from = { "heading", "subheading" };
		int[] to = { R.id.txtHeading, R.id.txtSubHeading };
		adapter = new SimpleAdapter (this, list, R.layout.listnotes, from, to);
		lstNotes.setAdapter(adapter);
		
		btnAdd.setOnClickListener(new View.OnClickListener() {			
			public void onClick(View v) {
				HashMap<String, String> item = new HashMap<String, String>();
				item.put("heading", txtNote.getText().toString());
				item.put("subheading", Integer.toString(count));
				list.add(item);
				adapter.notifyDataSetChanged();
				count++;
				txtNote.setText("");
			}
		});
		lstNotes.setOnItemClickListener(new OnItemClickListener(){		
			public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
				Toast.makeText(getApplicationContext(),
						((TextView)view.findViewById(R.id.txtHeading)).getText(), Toast.LENGTH_SHORT).show();
				
			}			
		});        
	}
}

other

ImageView imageView=(ImageView) view.findViewById(R.id.imageView1);
if((String) imageView.getTag() != "x"){
    imageView.setImageResource(R.drawable.x);
	imageView.setTag("x");
}
else{
    imageView.setImageResource(R.drawable.ok);
	imageView.setTag("");
}

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