Android Delete Rows Data in SQLite Database (Android SQLite)

package com.myapp;

import java.util.ArrayList;
import java.util.HashMap;

import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class myDBClass extends SQLiteOpenHelper {
	

    // Database Version
    private static final int DATABASE_VERSION = 1;
 
    // Database Name
    private static final String DATABASE_NAME = "mydatabase";
 
    // Table Name
    private static final String TABLE_MEMBER = "members";

	public myDBClass(Context context) {
		super(context, DATABASE_NAME, null, DATABASE_VERSION);
		// TODO Auto-generated constructor stub
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		// TODO Auto-generated method stub
		// Create Table Name
	    db.execSQL("CREATE TABLE " + TABLE_MEMBER + 
		          "(MemberID INTEGER PRIMARY KEY AUTOINCREMENT," +
		          " Name TEXT(100)," +
		          " Tel TEXT(100));");
	   
	    Log.d("CREATE TABLE","Create Table Successfully.");
	}
	

	// Delete Data
	public long DeleteData(String strMemberID) {
		// TODO Auto-generated method stub
		
		 try {
			
			SQLiteDatabase db;
     		db = this.getWritableDatabase(); // Write Data
     		
     		/**
     		 * for API 11 and above
			SQLiteStatement insertCmd;
			String strSQL = "DELETE FROM " + TABLE_MEMBER
					+ " WHERE MemberID = ? ";
			
			insertCmd = db.compileStatement(strSQL);
			insertCmd.bindString(1, strMemberID);
			
			return insertCmd.executeUpdateDelete();
			*
			*/
				
     		long rows = db.delete(TABLE_MEMBER, "MemberID = ?",
		            new String[] { String.valueOf(strMemberID) });
     		
     		db.close();
     		return rows; // return rows deleted.
				
		 } catch (Exception e) {
		    return -1;
		 }

	}
	
	
	// Show All Data
	public ArrayList<HashMap<String, String>> SelectAllData() {
		// TODO Auto-generated method stub
		
		 try {
			 
			 ArrayList<HashMap<String, String>> MyArrList = new ArrayList<HashMap<String, String>>();
			 HashMap<String, String> map;
			 
			 SQLiteDatabase db;
			 db = this.getReadableDatabase(); // Read Data
				
			 String strSQL = "SELECT  * FROM " + TABLE_MEMBER;
			 Cursor cursor = db.rawQuery(strSQL, null);
			 
			 	if(cursor != null)
			 	{
			 	    if (cursor.moveToFirst()) {
			 	        do {
			 	        	map = new HashMap<String, String>();
			 	        	map.put("MemberID", cursor.getString(0));
				 	        map.put("Name", cursor.getString(1));
				 	        map.put("Tel", cursor.getString(2));
				 	        MyArrList.add(map);
			 	        } while (cursor.moveToNext());
			 	    }
			 	}
			 	cursor.close();
			 	db.close();
				return MyArrList;
				
		 } catch (Exception e) {
		    return null;
		 }

	}
	

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		// TODO Auto-generated method stub
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_MEMBER);
        
        // Re Create on method  onCreate
        onCreate(db);
	}

}

<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" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="35dp"
        android:text="Main Menu"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView1"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="35dp"
        android:text="Add" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button1"
        android:layout_centerInParent="true"
        android:layout_marginTop="35dp"
        android:text="Show" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button2"
        android:layout_centerInParent="true"
        android:layout_marginTop="35dp"
        android:text="Update" />

    <Button
        android:id="@+id/button4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button3"
        android:layout_centerInParent="true"
        android:layout_marginTop="35dp"
        android:text="Delete" />

</RelativeLayout>