Programming the Mobile Web, second edition

With the second edition of this popular book, you’ll learn how to build HTML5 and CSS3-based apps that access geolocation, accelerometer, multi-touch screens, offline storage, and other features in today’s smartphones, tablets, and feature phones. The market for mobile apps continues to evolve at a breakneck pace, and this book is the most complete reference available for the mobile web.

Author and mobile development expert Maximiliano Firtman shows you how to develop a standard app core that you can extend to work with specific devices. This updated edition covers many recent advances in mobile development, including responsive web design techniques, offline storage, mobile design patterns, and new mobile browsers, platforms, and hardware APIs.

• Learn the particulars and pitfalls of building mobile websites and apps with HTML5, CSS, JavaScript and responsive techniques
• Create effective user interfaces for touch devices and different resolution displays
• Understand variations among iOS, Android, Windows Phone, BlackBerry, Firefox OS, and other mobile platforms
• Bypass the browser to create native web apps, ebooks, and PhoneGap applications
• Build apps for browsers and online retailers such as the App Store, Google Play Store, Windows Store, and App World

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Handle different layout for phone and tablet, in seperated layout folder

For the first generation of tablets running Android 3.0, the proper way to declare tablet layouts was to put them in a directory with the xlarge configuration qualifier (for example, res/layout-xlarge/). In Android 3.2 introduces a new way to specify resources for more discrete screen sizes. The new technique is based on the amount of space your layout needs (such as 600dp of width), rather than trying to make your layout fit the generalized size groups (such as large or xlarge).

For other cases in which you want to further customize your UI to differentiate between sizes such as 7” and 10” tablets, you can define additional smallest width layouts:

• res/layout/main_activity.xml:
  # For handsets (smaller than 600dp available width)
• res/layout-sw600dp/main_activity.xml:
  # For 7” tablets (600dp wide and bigger)
• res/layout-sw720dp/main_activity.xml:
  # For 10” tablets (720dp wide and bigger)

Read more: Supporting Multiple Screens

Exercise:

Create a new Android Application Project with Minimum Required SDK of API 13: Android 3.2 (Honeycomb).

Modify /res/layout/activity_main.xml for normal device.

<LinearLayout 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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Normal" />

</LinearLayout>

Create /res/layout-sw600dp/activity_main.xml to define layout for tablet.

<LinearLayout 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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="sw600dp" />

</LinearLayout>

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More: Step-by-step to create dual mode app, single-pane for phone/dual-pane for tablet.

• Handle different layout for phone and tablet, load fragment in Java code vs XML
• Handle onListItemClick() of ListFragment, to pass data between fragment
• Allow navigate BACK through FragmentTransaction, by calling addToBackStack()
• Display UP icon on action bar and implement BACK navigation in Fragment Transaction
• implements OnBackStackChangedListener to display UP icon, automatically by getBackStackEntryCount()
• Implement animation in FragmentTransaction

Related:
- Replace Fragment dynamically

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