Android

Menus been to lots of changes in android. We will study everything old and new of this API  + Options Menu   + In this chapter you will learn, + Create an options menu Place Action items on the Action Bar Create a Context menu Create a Popup menu There are three types of menus we can create in Android. 1. Options menu and app bar The options menu is the primary collection of menu items for an activity. It’s where you should place actions that have a global impact on the app, such as “Search,” “Compose email,” and “Settings.” + 2. Context menu and contextual action mode A context menu is a floating menu that appears when the user performs a long-click on an element. It provides actions that affect the selected content or context frame.The contextual action mode displays action items that affect the selected content in a bar at the top of the screen and allows the user to select multiple items. + 3. Popup menu A popup menu displays a l...

In the most basic Spinner implementation, selected item can be retrieved by calling parent.getItemAtPosition(position) in onItemSelected() method in OnItemSelectedListener. It will be the same object of the display items, as show in the spinner0 of the example. :  http://android-er.blogspot.in/2014/04/spinner-with-different-displat-text-and.html Sometimes, we want to display some meaningful text in Spinner (such as "Sunday", "Monday"...), but return some other value when any item selected (such as 0, 2...). Spinner with different display text and return value Here I show two approaches: The first one may be the simplest method, spinner1 in the example. Create another array to hold the values we want to return. And return the coresponding item on position in onItemSelected(). The second approach implement our custom class to hold the display text and the return value. And implement our custom Adapter, as shown in spinner2 in the example. package com...

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