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Android official has provided a variety of fragment use of the demo example, in our SDK below the API demo contains a variety of fragment use examples, need to see the demo friends, directly look at the API demo that program can be, do not go everywhere to find. It separates different functions and implements different classes.Today to explain the
Android has provided various Demo examples for Fragment. The API Demo below our SDK contains various use examples for Fragment. You need to check the Demo, you can simply look at the API Demo program without looking for it everywhere. Different functions are separated to implement different classes.
Today, I will explain how to control
When designing applications, we hope to be able to adapt to various devices as much as possible, including 4-inch screens, 7-inch screens, and 10-inch screens. The Android Development Documentation provides us with reference, in addition, Google Io app (ii) has also implemented this idea. They all use different layout files in layout and layout-large. The following is an article translated by developer.android.com, the examples in the figure show in d
I am a beginner in fragment and have written a few simple examples. Now I propose to help you learn and study.
Android fragment Study Notes (1)
The focus of this program is to put two fragment in an activity.
The page layout is shown in the following code (fragment_hide_show.xml ):
Each linearlayout has a
Android -- Fragment introduction and two basic usage methods
Today, when we call ViewPager, we feel that ViewPager + Fragment is more flexible. Therefore, we can sort out the Fragment and try again.
I. Why Fragment?
1. Flexible Layout
F
Class description
1. Nested classes
Class Fragment. InstantiationException
If an instantiation error occurs, the exception class is thrown through the instantiate (Context, String, Bundle) method.
Class Fragment. SavedState
You can use the FragmentManager. saveFragmentInstanceState (Fragment) method to obtain the status information to save from a
Generally, an activity may contain one or more fragment, which work together to form a consistent UI interface. In this case, communication between multiple fragments is very important. For example, an activity contains two fragment items, and the fragment field on the left contains a list (for example, a news topic list). When you click on a news topic, the
Android introduced the concept of fragment after 3.0, I guess the idea may just want to better compatible with large screen or tablet development, because the big screen can show more content, and more content, logic may be chaotic, and the use of fragment, you can wrap different logic into different fragment, But the
delete fragment in Mainactivity, and the methods called in Mainactivity are as follows:
Set the default fragment
Fragmentmanager FM = Getfragmentmanager ();
Fragmenttransaction transaction = Fm.begintransaction ();
Myfragment = new Myfragment ();
Transaction.replace (R.ID.FL, myfragment);
Transaction.commit ();
If you click on a button to update fragm
to use an Android support class library. We're going to change it to support's bag when we're in the fuse. But note that, but in the fragment manager, there is no support class library, we can use Getsupportfragmentmanager () to obtain a compatible low version of the managerPassing data in fragment and activity
Transferring data from
Android Fragment details, including potential problems
Fragment is a new feature of the android v4 package named "fragmented layout". The layout aims to replace the obsolete tabhost, which makes operations more convenient and greatly increases developers' efficient development. When using
Android. app. Fragment $ InstantiationException Cause Analysis
1. Fragment $ InstantiationException Cause Analysis
When writing Fragment class code, Android Lint sometimes prompts the following error:
Avoid not-default constructors in fragments: use a default constructor plu
"Android" Save fragment Toggle StateObjectiveSwitching fragment frequently can lead to frequent release and creation, and if fragment is a bloated experience it is very bad to share a method here.StatementWelcome reprint, but please keep the original source of the article:)Blog Park: http://www.cnblogs.comFarmer Uncle:
by commit (). But doing so is usually unnecessary unless the transaction is a subordinate to a task in another thread.Warning: You can only commit a transaction using commit () before the activity saves its state (when the user leaves the activity).3, communication with the activityAlthough fragment is implemented as an activity-independent object and can be used in multiple activity, a given fragment inst
I mainly learned a small example of Google official (http://developer.android.com/training/basics/fragments/index.html), how to display on the tablet as two screens, this is more suitable for news-like applications, first look at the next ~
In the last two articles, the viewpager adapter is used.
FragmentPagerAdapter,
FragmentStatePagerAdapterTo use fragment, we can also directly use fragment,
Android Development notes (11) -- DialogFragment click to listen, android development fragment
Reprinted Please note: http://www.cnblogs.com/igoslly/p/6931519.html
DialogFragment Usage click to listen
/* DialogFragment is a pop-up box for displaying an interface on the Activity, such as an input box, a warning box, and a confirmation box.* DialogFragment separ
Starting from Android 3.0, Google introduced a brand new fragment UI system to reinterpret reusable and extensible Android UI design concepts. The android support Library provides a complete post-fragment compatibility solution (backport) for any lower-version
Android learning route (22nd) uses Fragment to build a dynamic UI-to build a flexible UI
Position first. Next Translation: p
When designing your application to support a wide range of screen sizes, you can reuse your fragments in different layout deployments to optimize the user experience based on the available screen space.
For example, on a handset device it might be appropriate to display just one
(). SetText ("Tab 3 "). SetIcon (Android. R.drawable.ic_menu_agenda). Settablistener (New Actiontablistener (FRAGMENT3)); Actionbar.addtab (TAB1); Actionbar.addtab (TAB2); Actionbar.addtab (TAB3);} Class Actiontablistener implements Actionbar.tablistener {//Declaration fragmentprivate Fragment fragment;// By constructing a reference to the corresponding Fragment
Android. App. Fragment $ instantiationexception Solution
In actual development, I encountered two errors in Android. App. Fragment $ instantiationexception.
When an error is reported, the system prompts "Make sure class name exists, is public, and has an empty constructor that is public". If the fragement definition h
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