Ten innovations in design specifications of Android4.0

After reading and translating the Android design guide, compare the Android 4.0,4.1,4.4 version with the Android2.3 and previous version of the app Design Guide, summarizing the 10 major changes in the design specifications after Android 4.0, I would also like to thank Bo friends for my support of the article, the previous important design concept series of article reading has been soaring recently, also encouraged me to continue to write the series of articles.

First, navigation bar

The previous physical key navigation (return, menu, search, home page) becomes the virtual key (return, home page, recent task) of the embedded screen.

Remove the menu items and search items from the navigation bar and display the previously opened program app directly in the navigation bar by pressing the home key.

Second, the Action Bar

The action Bar is the most important structural element in Android apps. It provides a consistent navigation platform surface for user application behavior. Simply put, any interface that the user opens in the operation of your application can be done with the same functionality as the previous interface through the action bar.

To suit most applications, the action bar is divided into four different functional areas.

(1) Application icon

This is not much to say that we can show the identity of our different applications.

(2) View Control

If our application can display data in different views, this section of the action Bar allows the user to switch views/

(3) Action button

The most important function buttons that can be displayed here for our application

(4) More operations

Click to eject some infrequently used actions or about some system settings

The action bar can also be split into 1 main action bars, 2 top bars, and 3 bottom bars. If needed, the top bar can host tab tabs, and the bottom bar can host the primary operation and more actions that are being closed (action overflow).

When the space is sufficient for the horizontal screen display interface, the split action Bar can be flexibly merged together. As shown in the mobile phone side of the screen action Bar.

Three, multi-panel layout

Multi-panel layout is mainly for the development of the tablet, that is, using fragment fragement, I also introduced in the previous blog post a lot about how to use the fragement layout of the operation described. Composite display in the same interface, the effective use of tablet screen space, flat hierarchy, simplifying navigation.

Iv. selection

Long-press gestures are used in previous versions to display contextual action actions, and are used for data selection after android4.0. After the Android4.0, the position of the action Bar will be covered by a temporary contextual action bar, and the contextual menu flyout is no longer popped. In the context of the temporary context Action bar, the content items of the current interface are allowed to be processed individually and are also allowed to be processed in batches.

In the new version

(1) The user can select additional data by touching it.

(2) When a temporary context action bar is sent, the selected data is highlighted and the temporary action Bar is automatically determined to disappear.

(3) You can deselect the action by using the fallback button of the action Bar.

      The four major innovations about android4.0 are as shown above, I will continue to write android4.1 and 4.4 version of the update, please look forward to, and thank you Bo friends for their support.