Android SlidingDrawer Menu

package com.myapp;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.SlidingDrawer;
import android.widget.SlidingDrawer.OnDrawerCloseListener;
import android.widget.SlidingDrawer.OnDrawerOpenListener;
import android.widget.SlidingDrawer.OnDrawerScrollListener;
import android.app.AlertDialog;
import android.graphics.Color;


public class MainActivity extends Activity {

	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        // btnSlide
        final ImageButton btnSlide = (ImageButton) findViewById(R.id.btnSlide);
        btnSlide.setBackgroundColor(Color.TRANSPARENT);
        
        SlidingDrawer SlidingD = (SlidingDrawer) findViewById(R.id.slidingDrawer1);
        SlidingD.setOnDrawerOpenListener(new OnDrawerOpenListener() {
            public void onDrawerOpened() {
            	btnSlide.setImageResource(R.drawable.icon_down);
            }
        });
        SlidingD.setOnDrawerCloseListener(new OnDrawerCloseListener() {
            public void onDrawerClosed() {
            	btnSlide.setImageResource(R.drawable.icon_up);
            }
        });
        SlidingD.setOnDrawerScrollListener(new OnDrawerScrollListener() {

			public void onScrollEnded() {
				// TODO Auto-generated method stub
				
			}

			public void onScrollStarted() {
				// TODO Auto-generated method stub
				
			}
        	
        });
        
        
        
        // Event for Button
        final AlertDialog.Builder adb = new AlertDialog.Builder(this);
        
        ImageButton btnAdd = (ImageButton) findViewById(R.id.btnAdd);
        btnAdd.setBackgroundColor(Color.TRANSPARENT);
        btnAdd.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                AlertDialog ad = adb.create();
                ad.setTitle("Oh!! Android ");
                ad.setIcon(android.R.drawable.btn_star_big_on); 
                ad.setMessage("Button Add Event");
                ad.show();
            }
        });
        ImageButton btnCancel = (ImageButton) findViewById(R.id.btnCancel);
        btnCancel.setBackgroundColor(Color.TRANSPARENT);
        btnCancel.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                AlertDialog ad = adb.create();
                ad.setTitle("Oh!! Android ");
                ad.setIcon(android.R.drawable.btn_star_big_on); 
                ad.setMessage("Button Cancel Event");
                ad.show();
            }
        });        
        
        ImageButton btnDelete = (ImageButton) findViewById(R.id.btnDelete);
        btnDelete.setBackgroundColor(Color.TRANSPARENT);
        
        ImageButton btnBack = (ImageButton) findViewById(R.id.btnBack);
        btnBack.setBackgroundColor(Color.TRANSPARENT);
       
      
    }

	@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
	
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <SlidingDrawer
        android:id="@+id/slidingDrawer1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:content="@+id/content"
        android:handle="@+id/btnSlide" >




      <ImageButton
          android:id="@+id/btnSlide"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:src="@drawable/icon_up" />

        <LinearLayout
            android:id="@+id/content"
            android:orientation="vertical"
            android:gravity="center"
            android:layout_width="match_parent"
            android:layout_height="match_parent" >

            <ListView
                android:id="@+id/listView1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" >
            </ListView>
            
        </LinearLayout>
    </SlidingDrawer>
      
</RelativeLayout>