android fragment tutorial

Android fragment uses replace and saves the status Fragment plays an important role in development. It is very important to master its lifecycle and usage features. For example, templates often used in development: Click the menu and the center content follows the menu changes. However, when switching between a single menu, you need to save the previously entere

();} @Overrideprotected void Onrestart () {log.i (TAG, "Onrestart"); Super.onrestart ();} @Overridepublic void OnButtonClicked () {log.i (TAG, "onbuttonclicked"); TextView TV = (TextView) fragment1.getactivity (). Findviewbyid (R.ID.FRAGMENT2_TV); Tv.settext (Tv.gettext () + "\ n Receive data from Fragment1!");}}1. Implement the callback interface via implements .2. Rewrite the callback method and pass the data to Fragment2.Third, source code downloadClick I download. Download the source code i

This tutorial introduces my friends to Photoshop to create a cool method for the effect of flame fragment of beautiful women portraits. the effect produced by this tutorial is very beautiful and difficult. we recommend that you go to my feet home, if you like it, you can follow the tutorial to learn it. this

Android fragment is more than Android4.0, and fragmentactivity is for compatibility with the fragment of the 4.0 versions below.So if you want to be compatible with Android version 4.0 below using fragment, the framework activity needs to inherit fragmentactivity,fragmentact

@Nullable PublicView Oncreateview (layoutinflater inflater, @Nullable viewgroup container, @Nullable Bundle savedinstancest ATE) {View View= View.inflate (GetContext (), R.layout.fragment_left,NULL); Message=(TextView) View.findviewbyid (r.id.message); returnview; }}Click the Actionbar left_item button---> Run:When you click Left_item, you switch to fragment to display the content.Then there is the third way of communication: EventbusI. OverviewThe E

Original URL: http://blog.csdn.net/eyu8874521/article/details/8252216Through the recent idle time on the study of fragment, try to write a small demo, will be used in the development of fragment knowledge to put together, wrote this demo to the Android fragment more in-depth understanding of the project will be a lot e

Mutual communication between Android fragment and activity Objective Since the introduction of Android3.0, the main purpose of the fragment is to support dynamic and flexible interface design and screen adaptation problems. Fragmenty cannot exist alone and must rely on activity as part of a view display, a colleague who has its own lifecycle, receives its own e

Problem: When we start a fragment from an activity and then instantiate some sub-fragment in this fragment, there is a return in the child fragment to initiate another activity, That is, through the Startactivityforresult way to start, this time caused by the phenomenon will be, son

Android solves the problem of flashing a black screen during SurfaceView switching in Fragment. After restructuring a previous news client, Fragment is all used for page switching. There is only one portal Activity as the startup Activity of the program. One of the interfaces needs to call the camera to identify the QR code, as a result, SurfaceView will be used

"); Super.onrestart ();} @Overridepublic void OnButtonClicked () {log.i (TAG, "onbuttonclicked"); TextView TV = (TextView) fragment1.getactivity (). Findviewbyid (R.ID.FRAGMENT2_TV); Tv.settext (Tv.gettext () + "\ n Receive data from Fragment1! ");}}1. Implement callback interface via implements ;2. Rewrite the callback method and pass the data to Fragment2.Third, the source code downloadClick I download, download the source code Import project can be used!Next May introduce the animation effect

Myfragment Status by Onsaveinstancestate3. The user clicks into the app again4, because the myactivity is recycled, the system will restart the myactivity, based on the previously saved myfragment State recovery fragment5. In myactivity code logic, the new myfragment will be created again6, the page appears chaotic, covers two layers of fragment. If the restored myfragment uses the Getactivity () method, the null pointer exception is reportedFor the

[Android] Create a tab with fragment, androidfragment Interface layout, linear layout, horizontal arrangement, and average center Distribution Four textviews, 0 dip in width, 1 in weight, and center content Use the LinearLayout control to set the id of the subject content. Creates four Fragment Option Classes that inherit the

The demo works as follows:Also in the vertical screen when the effect is this:The layout file is as follows:You can see that there are two resource files, one is to handle the horizontal screen is a vertical screenThe first one:linearlayout xmlns:android="Http://schemas.android.com/apk/res/android" Android:layout_width="Match_parent"android:layout_height="Match_parent" Android:orientation="Horizontal" > fragmentandroid:id="@+id/titles

In Android development, the activity between intent using bundle,fragment between and activityty through the setarguments using bundles, for some simple parameter transfer is relatively simple, and there are many ways, This is not introduced. Here is a description of complex parameter passing, such as passing set ArrayList, Object arraylistThe bundle is basically the same, whether it is the parameter passin