By Kyle Mew, Rick Boyer
The Android OS has the biggest set up base of any working procedure on this planet; there hasn't ever been a greater time to benefit Android improvement to write down your personal functions, or to make your personal contributions to the open resource community!
This “cookbook” will make it effortless that you can bounce to a subject matter of curiosity and get what you want to enforce the function on your personal software. while you're new to Android and research most sensible by means of “doing,” then this booklet will offer many issues of interest.
Starting with the fundamentals of Android improvement, we flow directly to extra complicated options, and we'll advisor you thru universal initiatives builders fight to unravel. the 1st few chapters conceal the fundamentals together with actions, Layouts, Widgets, and the Menu. From there, we hide fragments and knowledge garage (including SQLite), gadget sensors, the digicam, and GPS. Then we circulate on extra complex themes equivalent to photographs and animation (including OpenGL), multi-threading with AsyncTask, and net performance with Volley. We'll additionally display Google Maps and Google Cloud Messaging (also often called Push Notifications) utilizing the Google API Library.
Finally, we'll look at numerous on-line companies designed particularly for Android improvement. Take your program big-time with complete net internet companies with no need to develop into a server admin via leveraging the facility of Backend as a provider (BaaS) companies.
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Extra resources for Android Application Development Cookbook Second Edition
1. Open the OptimizingLayouts project in Android Studio. Run the project on your rooted device (or emulator) and make sure the screen is visible (unlock if needed). 2. In Android Studio, start the Android Device Monitor by going to the following menu option: Tools | Android | Android Device Monitor. 3. In Android Device Monitor, change to the Hierarchy View perspective, by going to Window | Open Perspective… this will bring up the following dialog: 4. Now click on Hierarchy Viewer and on OK. 43 Layouts 5.
23 2 Layouts In this chapter, we will cover the following topics: ff Defining and inflating a layout ff Using RelativeLayout ff Using LinearLayout ff Creating tables – TableLayout and GridLayout ff Using ListView, GridView, and Adapters ff Changing layout properties during runtime ff Optimizing layouts with the Hierarchy Viewer Introduction In Android, the User Interface is defined in a Layout. A layout can be declared in XML or created dynamically in code. ) A layout can define an individual ListItem, a fragment, or even the entire Activity.
This is not a requirement as cells can be skipped or left empty. ) The GridLayout uses the opposite approach. The number of rows and columns are specified when creating the table. We don't have to specify the row or column information (though we can, discussed as follows). Android will automatically add each View to the cells in order. 36 Layouts There's more... First, let's see more similarities between the layouts. Both layouts have the ability to stretch columns to use the remaining screen space.
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