Android SubMenu with Example

Submenu

• Submenus are displayed as regular Menu Items that, when selected, reveal more items.
• Traditionally,submenus are displayed in a hierarchical tree layout. Android uses a different approach to simplify menu navigation for small-screen devices. Rather than a tree structure, selecting a submenu presents a single floating window that displays all of its Menu Items. 
• You can add submenus using the addSubMenu() method. It supports the same parameters as the add method used to add normal Menu Items, enabling you to specify a group, unique identifier, and text string for each submenu. You can also use the setHeaderIcon and setIcon methods to specify an iconto display in the submenu’s header bar or icon menu, respectively.
  
  
  Download Android SubMenu :Example Code

We will see an Exaple that will Display SubMenu for Background & TextColor of the Text View Whatever color you will select that will be set as Backfround and Text color respectively

• We will create menu "Text Color" and "Text Color" and add the Sub Menu to these menus. 
• Using menu/menus.xml file as follows.

<?xml version="1.0" encoding="utf-8"?>
<menu
  xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/TextColor" 
     android:title="Text Color">
     <menu >
       <item android:id="@+id/TextRed" 
        android:title="Red" />
       <item android:id="@+id/TextGreen" 
        android:title="Green" />
       <item android:id="@+id/TextBlue" 
        android:title="Blue" />
     </menu> 
    </item>
    
    <item android:id="@+id/BackColor" 
     android:title="Back Color">
     <menu >
       <item android:id="@+id/BackRed" 
        android:title="Red" />
       <item android:id="@+id/BackGreen" 
        android:title="Green" />
       <item android:id="@+id/BackBlue" 
        android:title="Blue" />
     </menu> 
    </item>
    
</menu>

• We will write the Java code as follows.

package com.widget;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class SubMenuXmlActivity extends Activity {
    /** Called when the activity is first created. */
    TextView tv;
 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        tv=(TextView)findViewById(R.id.Tv01);
    }
 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // TODO Auto-generated method stub
  getMenuInflater().inflate(R.menu.menus, menu);
  
  return super.onCreateOptionsMenu(menu);
 }
 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  // TODO Auto-generated method stub
  switch(item.getItemId())
  {
  case R.id.TextRed:
   tv.setTextColor(Color.RED);
   break;
  case R.id.TextGreen:
   tv.setTextColor(Color.GREEN);
   break;
  case R.id.TextBlue:
   tv.setTextColor(Color.BLUE);
   break;
  case R.id.BackRed:
   tv.setBackgroundColor(Color.RED);
   break;
  case R.id.BackGreen:
   tv.setBackgroundColor(Color.GREEN);
   break;
  case R.id.BackBlue:
   tv.setBackgroundColor(Color.BLUE);
   break; 
  }
  return super.onOptionsItemSelected(item);
 }
 
 
}

• The OutPut will be as follows First click on Menu Button. That will display two menu as follows
  
  
•  Than suppose we select "Text Color" that show following Submenu for Text Color.
  
  
•  Suppose if we select "Red" than the Text Color of TextView Will become Red.
  
  
•  Than suppose we select "Back Color" that show following Submenu for Back Color.
  
  
•  Suppose if we select "Green" than the Background Color of TextView Will become Green.