AndroidCustomDialog.doc

Custom Dialog
Create a Dialog
Dialog d=new Dialog(MainActivity.this);
Set Following Properties
Dialog d=new Dialog(MainActivity.this);
d.setContentView(R.layout.dialog);
d.setTitle("Important Message....");
d.setCancelable(true);
d.show();

Create UI with name dialog.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="This is very important!"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="20dp"
        android:text="The Time Table of First Mid Terms"
        android:textAppearance="?android:attr/textAppearanceLarge" />

</LinearLayout>
Complete Code
public class MainActivity extends ActionBarActivity 
{
Button b1;
    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        b1=(Button) findViewById(R.id.button1);
        b1.setOnClickListener(new A());
    }
    class A implements OnClickListener
    {
		@Override
		public void onClick(View arg0) 
		{
			Dialog d=new Dialog(MainActivity.this);
			d.setContentView(R.layout.dialog);
			d.setTitle("Important Message....");
			d.setCancelable(true);
			d.show();
		}
    	
    }
}