Android Recipes: A Problem-Solution Approach by Dave Smith, Erik Hellman

By Dave Smith, Erik Hellman

Discover greater than a hundred down-to-earth code recipes, masking a variety of precious issues utilizing whole and real-world operating code examples. This booklet is up to date to incorporate the Android N SDK (7.0), in addition to previous releases.

Crammed with insightful guideline and beneficial examples, this 5th version of Android Recipes is your advisor to writing apps for considered one of today’s most popular cellular structures. It bargains pragmatic suggestion to help you get the task performed speedy and good. this may prevent loads of paintings over making a venture from scratch.

Instead of summary descriptions of complicated strategies, in Android Recipes you will find dwell code examples. for those who begin a brand new undertaking you could contemplate copying and pasting the code and configuration records from this ebook after which editing them to your personal customization wishes.

What you will Learn

  • Code for Android smartphones and tablets
  • Use exterior libraries to avoid wasting time and effort
  • Boost app functionality through the use of the Android NDK and RenderScript
  • Design apps for functionality, responsiveness, and seamlessness
  • Send info among units and different exterior hardware
  • Persist program information and proportion it among applications
  • Capture and play again a number of machine media items
  • Communicate with internet services
  • Get the main from your consumer interface

Who This e-book Is For

All Android app developers.

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Extra info for Android Recipes: A Problem-Solution Approach

Example text

Another powerful addition is the AnimationUpdateListener, which provides regular callbacks while the animation is going on. The getAnimatedFraction() method returns the current percentage to completion of the animation. You can also use getAnimatedValue() to get the exact value of the property at the current point in time. In the example, we use the first of these methods to swap the heads and tails images when the animation reaches the two points where the coin should change sides (90 degrees and 270 degrees, or 25 percent and 75 percent of the animation duration).

Hide() will animate the element in and out of view. If FEATURE_ACTION_BAR_OVERLAY is requested, this change will not affect the content of the activity; otherwise, the view content will shift up and down to accommodate the change. (API Level 16) Listing 1-11 illustrates an example of how to hide all system UI controls temporarily. Listing 1-11. main); } public void onToggleClick(View v) { //Here we only need to hide the UI on a tap because // Android will make the controls reappear automatically // anytime the screen is tapped after they are hidden.

Xml files packaged with the Android framework include a few options for themes with some useful custom properties. Light: Variation on the standard theme that uses an inverse color scheme for the background and user elements. 0. Light: (API Level 11) Theme that uses an inverse color scheme and that has an action bar by default. 0. DarkActionBar: (API Level 14) Theme with an inverse color scheme but a dark solid action bar. 0. Light: (API Level 21) Theme with a simplified color scheme governed by a small palette of primary colors.

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