Android Context Menu สร้างเมนูแบบ Context Menu แบบง่าย ๆ

package com.myapp;

import android.os.Bundle;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import android.app.Activity;


public class MainActivity extends Activity {
	
	String[] Cmd1 = {"Command1","Command2","Command3","Command4"};
	String[] Cmd2 = {"Command5","Command6","Command7","Command8"};
	
	Button btn1;
	Button btn2;
	
	String btnClick;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        // button1
        btn1 = (Button)findViewById(R.id.button1); 
        
        // button2
        btn2 = (Button)findViewById(R.id.button2); 
        
        registerForContextMenu(btn1);
        registerForContextMenu(btn2);
    }   
    
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {

		menu.setHeaderIcon(android.R.drawable.btn_star_big_on);	
		
	    if (v == btn1) {
	    	btnClick = "Cmd1";
			String[] menuItems = Cmd1; 
			menu.setHeaderTitle("Menu 1");
			for (int i = 0; i<menuItems.length; i++) {
				menu.add(Menu.NONE, i, i, menuItems[i]);
			}
	    } else if (v == btn2) {
	    	btnClick = "Cmd2";
			String[] menuItems = Cmd2; 
			menu.setHeaderTitle("Menu 2");
			for (int i = 0; i<menuItems.length; i++) {
				menu.add(Menu.NONE, i, i, menuItems[i]);
			}
	    }
	    

    }
    
    @Override
    public boolean onContextItemSelected(MenuItem item) {
	    int menuItemIndex = item.getItemId();
	    
	    // for Cmd1
	    if(btnClick == "Cmd1")
	    {
	    	
			String[] menuItems = Cmd1;
			String CmdName = menuItems[menuItemIndex];
		    
		    // Check Event Command
	        if ("Command1".equals(CmdName)) {
	          	 Toast.makeText(MainActivity.this,"Your Selected Command1",Toast.LENGTH_LONG).show();
	          	 /**
	          	  * Call the mthod
	          	  * Eg: Command1();
	          	  */
	        } else if ("Command2".equals(CmdName)) {
	       	 Toast.makeText(MainActivity.this,"Your Selected Command2",Toast.LENGTH_LONG).show(); 
	      	 /**
	      	  * Call the mthod
	      	  * Eg: Command2();
	      	  */
	        } else if ("Command3".equals(CmdName)) {
	          	 Toast.makeText(MainActivity.this,"Your Selected Command3",Toast.LENGTH_LONG).show(); 
	          	 /**
	          	  * Call the mthod
	          	  * Eg: Command3();
	          	  */
	        } else if ("Command4".equals(CmdName)) {
	          	 Toast.makeText(MainActivity.this,"Your Selected Command4",Toast.LENGTH_LONG).show();
	          	 /**
	          	  * Call the mthod
	          	  * Eg: Command4();
	          	  */
	        }

	    }
	    
	    // for Cmd2
	    if(btnClick == "Cmd2")
	    {
	    	
			String[] menuItems = Cmd2;
			String CmdName = menuItems[menuItemIndex];
		    
		    // Check Event Command
	        if ("Command5".equals(CmdName)) {
	          	 Toast.makeText(MainActivity.this,"Your Selected Command5",Toast.LENGTH_LONG).show();
	          	 /**
	          	  * Call the mthod
	          	  * Eg: Command5();
	          	  */
	        } else if ("Command6".equals(CmdName)) {
	       	 	Toast.makeText(MainActivity.this,"Your Selected Command6",Toast.LENGTH_LONG).show(); 
		      	 /**
		      	  * Call the mthod
		      	  * Eg: Command6();
		      	  */
	        } else if ("Command7".equals(CmdName)) {
	          	 Toast.makeText(MainActivity.this,"Your Selected Command7",Toast.LENGTH_LONG).show(); 
	          	 /**
	          	  * Call the mthod
	          	  * Eg: Command7();
	          	  */
	        } else if ("Command8".equals(CmdName)) {
	          	 Toast.makeText(MainActivity.this,"Your Selected Command8",Toast.LENGTH_LONG).show();
	          	 /**
	          	  * Call the mthod
	          	  * Eg: Command8();
	          	  */
	        }

	    }
        
    	return true;
    }

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

}

	String[] Cmd1 = {"Command1","Command2","Command3","Command4"};
	String[] Cmd2 = {"Command5","Command6","Command7","Command8"};