By Dave Smith, Erik Hellman
Become aware of greater than a hundred down-to-earth code recipes, protecting a variety of necessary themes utilizing entire and real-world operating code examples. This publication is up to date to incorporate the Android N SDK (7.0), in addition to previous releases. full of insightful guideline and worthy examples, this 5th variation of Android Recipes is your advisor to writing apps for one in all today’s most well-liked cellular structures. It bargains pragmatic recommendation to help you get the task performed speedy and good. this may prevent loads of paintings over making a venture from scratch. rather than summary descriptions of advanced recommendations, in Android Recipes youll locate stay code examples. in case you commence a brand new venture you could give some thought to copying and pasting the code and configuration documents from this e-book after which editing them in your personal customization wishes.
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Additional info for Android Recipes A Problem-Solution Approach
If we did not reset this property, it would fade in but would still be 1,000 pixels off to the right. ObjectAnimator While ViewPropertyAnimator is convenient for animating simple properties quickly, you may find it a bit limiting if you want to do more-complex work such as chaining animations together. For this purpose, we can go to the parent class, ObjectAnimator. With ObjectAnimator, we can set listeners to be notified when the animation begins and ends; also, they can be notified with incremental updates as to what point of the animation we are in.
Styles do support inheritance, however, which allows us to cascade our definitions of each style before they are applied to the view. Notice how each style also declares a parent. This is the base framework style that we should inherit from. Parent styles are not required, but because of the single style rule on each view, overwriting the default with your custom version replaces the theme’s default. If you don’t inherit from a base parent, you will be forced to define all the attributes that view needs.
The one exception to this behavior is our TextView headings, which accept a special android:textAppearance attribute. This attribute takes a style reference, and applies only to text-formatting attributes (size, style, color, and so forth). When used, a TextView still allows a separate style attribute to be applied concurrently. In this way, it is the one supported instance in the framework of multiple styles on a single view. Themes A theme in Android is a type of appearance style that is applicable to an entire application or activity.