Android User Interface Development: Beginners Guide by Jason Morris

By Jason Morris

"Quickly layout and boost compelling person interfaces on your Android functions Leverage the Android systems flexibility and tool to layout impactful user-interfaces construct compelling, simple functions that may glance nice on any Android equipment Make your program stick out from the remaining with kinds and subject matters a realistic newbies advisor to take you step by step throughout the strategy of constructing consumer interfaces to get your functions noticed!In DetailThere are over 30,000 functions for Android which were downloaded over one million instances already. What makes yours any varied? development a compelling user-interface that folks comprehend and revel in is key for the survival of a brand new program in an atmosphere the place feel and appear could be the merely factor among a person procuring your software; or deleting it forever.Working via examples, code-snippets, and screenshots this ebook introduces the basics of fine user-interface layout from a builders viewpoint. This booklet will positioned you above the remaining by means of exhibiting you the way to construct impressive consumer interfaces to know your app clients realization sufficient to lead them to shell out a few greenbacks to shop for your application.The Android person Interface improvement newbies consultant will inform you every thing you must understand to variety your purposes from backside up. Given the significance of user-interface layout on a touch-screen equipment, this e-book goals to equip its reader with the data required to construct killer Android purposes. beginning easily, and retaining issues effortless, this booklet will take you on a step by step trip to knowing the principals of excellent user-interface layout, and the way to enforce the simplest person interfaces on an Android cellular gadget. It goals at development layout knowing on a chapter-by-chapter foundation, whereas introducing platform wisdom via examples.A useful definitive advisor for builders who are looking to layout and strengthen appealing Android user-interfaces What you are going to research from this bookDesign common interfaces that help speedy and simple entry to info discover and enforce a number of layouts in Android to layout consumer interfaces for the various monitor sizes and densities make certain a constant user-interface event and increase your program functionality through reusing your program parts layout easy-on-the-eye subject matters to your Android purposes exhibit and choose complicated facts constructions from functions equivalent to an address-book or calendar software by utilizing Android widgets Entertain your software clients by means of animating visible queues of what the appliance is at present doing, and what influence their activities are having customise the integrated periods in Android to reinforce the person interface by means of growing tabs and galleries Leverage Androids source loading method find out how top to give your consumer with details; or trap details from them paintings via examples that includes all significant Android widgets, and a few of the more odd componentsApproachThis is a step by step consultant that goals to offer even a amateur Android developer an outstanding seize of user-interface layout, whereas operating via examples, diagrams, and screenshots to exhibit a number of the widgets and instruments that the platform makes on hand. Who this ebook is written forIf you may have a bit adventure in Java and wish to construct purposes for the Android telephones, then this publication is for you. This ebook also will assist you in the event you have already got purposes at the Android platform and wish to realize extra wisdom of user-interface layout. it is going to attract all the following readers:Junior Android builders MIDP builders trying to develop their skill-set iPhone builders desirous to port purposes Entrepreneurial Android builders eager to widen their consumer base "

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Keeping each screen simple and responsive keeps your users happy. Now that we've learned how to create a skeleton Android project, and a simple Activiy, we can focus on the more subtle problems and solutions of Android user interface design. In the next chapter, we will focus on working with data-driven widgets. Android has several widgets designed specifically for displaying and selecting from more complex data structures. These widgets form the basis of data-driven applications such as an address book or a calendar application.

An Adapter is also expected to provide identifiers for the various items, we will just return their index: public long getItemId(int index) { return index; } 5. When an Adapter is asked for a View of a list item, it may be given an existing View object that could be reused. burger_item, null); return item; } 6. The most important method for us in the BurgerAdapter is the getView method. This is where the ListView will ask us for a View object to represent each list item it needs to display: public View getView(int index, View reuse, ViewGroup parent) { 7.

In our case, we chose to use whitespace, as space also helps make the user interface feel cleaner. We created our whitespace by using a margin above each of the buttons. Margins and padding work exactly the same way as they (should) do in CSS. A margin is spacing outside of the widget, while padding is spacing inside the widget. In Android, a margin is the concern of the ViewGroup, and so its attribute name is prefixed with layout_. " android:padding="25sp" android:layout_marginTop="12sp" android:layout_width="fill_parent" android:layout_height="wrap_content"/> The previous code would create extra space between the edge of the Button and the text in the middle of it, as well as retaining the margin above the button.

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