Saturday 28 September 2013

Simples Menus in Android

How to add simple menu in android?


Now lets Create a simple menu item in android.
There are 3 types of menu in android.
1.Options menu
2.Context menu
3.Popup menu

First we'll discuss about options menu

1.MainActivity.java

package com.sri.menus;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case R.id.m1:
Toast.makeText(getApplicationContext(), "menu 1",
Toast.LENGTH_SHORT).show();
break;
case R.id.m2:
Toast.makeText(getApplicationContext(), "menu 2",
Toast.LENGTH_SHORT).show();
default:
break;
}
return super.onOptionsItemSelected(item);
}

}


2.activity_main.xml

<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:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Displaying Menu" />

</RelativeLayout>

3. Check in res/menu folder the main.xml
in that

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        android:showAsAction="never"
        android:title="@string/action_settings"/>
    <item
        android:id="@+id/m1"
        android:showAsAction="ifRoom"
        android:title="menu 1"/>
    <item
        android:id="@+id/m2"
        android:showAsAction="ifRoom"
        android:title="menu 2"/>

</menu>

4. In main.xml, the android:showAsAction="ifRoom" is written to show it on the action bar and have the more priority.
android:showAsAction="never" is used to hide in the menu and show's on more button.

5.That's it now run it.

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