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Option Menu And Context Menu Example

OptionMenu gets triggered when hardware button "Menu" Pressed or Menu Icon on the top of Actionbar is clicked.In order to display options menus the onCreateOptionsMenu and onOptionsItemSelected functions should be implemented on the Activity class.

ContextMenu gets triggered when a Button (A TextView may be) is long pressed. Prior to implement the onCreateContextMenu and onContextItemSelected functions we also need to registerForContextMenu function to register with the button view.

A Menu view could be called from XML file put under menu folder under the res folder or Menu items view can also be created in run time on the respective onCreateContext/OptionMenu functions.

Project Structure

OptionMenu on Devices 3.x, 4.x onwards

OptionMenu on When clicking menu hardware button on Devices 3.x, 4.x onwards

OptionMenu on Devices 1.x,2.x (Legacy mode, no action bar, Displayed when menu hardware button clicked)

ContextMenu on Long Pressing a button (on Devices all devices)

MyActivity.java

package com.dev.menu.example;

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

public class MyActivity extends Activity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.my_activity);
		Button menuButton = (Button) findViewById(R.id.menubutton);
		registerForContextMenu(menuButton);
	}

	@Override
	public void onCreateContextMenu(ContextMenu menu, View v,
			ContextMenuInfo menuInfo) {
		// TODO Auto-generated method stub
		super.onCreateContextMenu(menu, v, menuInfo);
		menu.setHeaderTitle("Option Menu");
		menu.add(Menu.NONE, 100, 0, getResources().getString(R.string.choice_1));
		menu.add(Menu.NONE, 101, 0, getResources().getString(R.string.choice_2));
		menu.add(Menu.NONE, 102, 0, getResources().getString(R.string.choice_3));
		menu.add(Menu.NONE, 103, 0, getResources().getString(R.string.choice_4));
	}

	@Override
	public boolean onContextItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		switch (item.getItemId()) {
		case 100:

			break;
		case 101:

			break;
		case 102:

			break;
		case 103:

			break;

		default:
			break;
		}
		return super.onContextItemSelected(item);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// TODO Auto-generated method stub
		getMenuInflater().inflate(R.menu.my_activity_menu, menu);
		return super.onCreateOptionsMenu(menu);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		switch (item.getItemId()) {
		case R.id.item1:

			break;
		case R.id.item2:

			break;
		case R.id.item3:

			break;
		case R.id.item4:

			break;
		default:
			break;
		}
		return super.onOptionsItemSelected(item);
	}
}

my_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical" >

    <Button
        android:id="@+id/menubutton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/longpress" />

</LinearLayout>

my_activity_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/item1"
        android:title="@string/choice_1"/>
    <item
        android:id="@+id/item2"
        android:title="@string/choice_2"/>
    <item
        android:id="@+id/item3"
        android:title="@string/choice_3"/>
    <item
        android:id="@+id/item4"
        android:title="@string/choice_4"/>

</menu>

strings.xml

<resources>

    <string name="app_name">MenuExample</string>
    <string name="choice_1">Choice 1</string>
    <string name="choice_2">Choice 2</string>
    <string name="choice_3">Choice 3</string>
    <string name="choice_4">Choice 4</string>
    <string name="longpress">Long Press this</string>

</resources>

AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.dev.menu.example"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity android:name=".MyActivity" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

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