Und hier die lösung:
http://i.thiyagaraaj.com/artic…popupusinglayoutinandroid
Code
		
					
			import android.app.Activity;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class ExPopup extends Activity {
	Dialog myDialog;
	Button myButton;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		myDialog = new Dialog(ExPopup.this);
		myDialog.setContentView(R.layout.mydialog);
		myDialog.setTitle("My Dialog");
		myDialog.setCancelable(true);
		Button button = (Button) myDialog.findViewById(R.id.Btn1);
		button.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				myDialog.dismiss();
			}
		});
		myDialog.show();
	}
}
	
			Alles anzeigen
	main.xml:
Code
		
			<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:id="@+id/RelativeLayout01" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<Button android:layout_height="wrap_content"
		android:layout_width="wrap_content" android:id="@+id/ClkBtn"
		android:text="Click Me. and Get Dialog"></Button>
</RelativeLayout>
	
	mydialog.xml:
Code
		
					
			<?xml version="1.0" encoding="utf-8"?>
	<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 	android:background="#000080"
 	android:layout_width="250px"
 	android:layout_height="wrap_content">
  	
 	<TextView android:id="@+id/Tv1"
 	android:layout_width="wrap_content"
 	android:layout_height="wrap_content"
 	android:textSize="20px"
 	android:text="Articles"/>
 	
 	<TextView android:id="@+id/Tv2"
 	android:layout_width="wrap_content" android:layout_height="wrap_content"
 	android:textSize="14px"
 	android:layout_below="@+id/Tv1"
 	android:text="More Android Articles visit\nhttp://i.thiyagaraaj.com"/>
 	
 	<Button android:id="@+id/Btn1"
 	android:layout_below="@+id/Tv2"
 	android:layout_width="wrap_content"
 	android:layout_height="wrap_content"
 	android:layout_centerHorizontal="true"
 	android:text="Close" />
	</RelativeLayout>
	
			Alles anzeigen