Get Android Recipes A Problem-Solution Approach PDF

By Dave Smith, Erik Hellman

Realize greater than a hundred down-to-earth code recipes, masking a variety of precious issues utilizing whole and real-world operating code examples. This e-book is up-to-date to incorporate the Android N SDK (7.0), in addition to past releases. filled with insightful guideline and worthwhile examples, this 5th version of Android Recipes is your consultant to writing apps for one in every of today’s preferred cellular systems. It deals pragmatic recommendation to help you get the activity performed quick and good. this may prevent loads of paintings over making a undertaking from scratch. rather than summary descriptions of complicated suggestions, in Android Recipes youll locate stay code examples. if you begin a brand new venture you could reflect on copying and pasting the code and configuration documents from this ebook after which enhancing them in your personal customization wishes.

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WRAP_CONTENT)); } } 27 Chapter 1 ■ Layouts and Views This simple example adds Button instances to a LinearLayout when the Add Item button is tapped. Each new button is outfitted with the ability to remove itself from the layout when it is tapped. In order to animate this process, all we need to do is set android:animateLayoutChanges="true" on the LinearLayout, and the framework does the rest. By default, a new button will fade in to its new location without disturbing the other views, and a removed button will fade out while the surrounding items slide in to fill the gap.

SetSystemUiVisibility(newVis); } } The methods setSystemUiVisibility() and getSystemUiVisibility() can be called on any view currently visible inside the window where you want to adjust these parameters. Hiding Navigation Controls (API Level 14) SYSTEM_UI_FLAG_HIDE_NAVIGATION removes the onscreen HOME and BACK controls for devices that do not have physical buttons. While Android gives developers the ability to do this, it is with caution because these functions are extremely important to the user.

4+, Animator also supports pause() and resume() methods to suspend a running animation without completely canceling it. AnimatorSet When you need to execute multiple animations, they can be collected in an AnimatorSet. Sets of animations can be played together at the same time, or sequenced to play one after the other. Defining collections of animations can get a bit verbose in Java code, so we will turn to the XML animation format for this example. Listing 1-19 defines a set of animations we will apply to our coin flip.

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

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