Framelayout and fragment handles Android application UI layout instance _android

The use of fragment and layout is generally the main activity to manage fragment interactively by using a frame-filled activity:

1. Due to the use of Getsupportfragmentmanager (), the extends of the main activity needs to be fragmentactivity:

  The public class Mainactivity extends fragmentactivity{...
  }

2. The layout (XML file) of the main activity establishes multiple frame and defines its android:id= "@+id/xxx"
3. In the operation function within the main activity, the framelayout are populated by the lookup ID:
Add a statement as follows

Copy Code code as follows:

Getsupportfragmentmanager (). BeginTransaction (). Add (R.id.fragment_container2,new Nullfrag ()). commit ();

Obtain support for Fragment management ()-> start trading ()-> Add (frame ID, Fragment). Delivery ();
The replacement statement is as follows
Getsupportfragmentmanager (). BeginTransaction (). Replace (R.id.fragment_container2,new Nullfrag ()). commit ();
Obtain support for Fragment management ()-> start trading ()-> substitution (frame ID, Fragment). Delivery ();
Cases:

Copy Code code as follows:

public void click_btn_flag02 (view view) {
Getsupportfragmentmanager (). BeginTransaction (). Replace (R.id.fragment_container2,new Midfrag ()). commit ();
}

Note: function parameters to use view

Here's a look at the example:

The left side of the effect chart is a list, and the right side is the details of the list item.
First look at the layout file (layout):

 <?xml version= "1.0" encoding= "Utf-8"?> <linearlayout "xmlns:android=" Schemas.android.com/apk/res/android "android:orientation=" horizontal "android:layout_width=" Match_parent "Android : layout_height= "Match_parent" > <fragment class= "com.fragment.main.TitlesFragment" android:id= "@+id/titles" a ndroid:layout_weight= "1" android:layout_width= "0px" android:layout_height= "match_parent"/> <FrameLayout Android:id= "@+id/details" android:layout_weight= "1" android:layout_width= "0px" android:layout_height= "Match_" Parent "android:background=" Android:attr/detailselementbackground "/> </LinearLayout> 

The fragment label and Framelayout label are used in the

        layout file. The Android fragment uses a method of embedding fragment in 2, which is used in this example, and is seen from the layout file with the fragment tag, which is a way to The framelayout tag will become the second carrier view to load fragment.
        See program Implementation (Com.fragment.main.TitlesFragment):

public class Titlesfragment extends listfragment {int mcurcheckposition = 0; 
 
 int mshowncheckposition =-1; 
               
  @Override public void onactivitycreated (Bundle savedinstancestate) {super.onactivitycreated (savedinstancestate); Setlistadapter (New arrayadapter<string> (getactivity), Android. R.layout.simple_list_item_activated_1, Shakespeare.titles)); 
   Populates the list with a static array if (Savedinstancestate!= null) {mcurcheckposition = Savedinstancestate.getint ("Curchoice", 0); 
  Mshowncheckposition = Savedinstancestate.getint ("Shownchoice",-1); 
   } getlistview (). Setchoicemode (Listview.choice_mode_single); 
 ShowDetails (mcurcheckposition); 
 
  @Override public void Onsaveinstancestate (Bundle outstate) {super.onsaveinstancestate (outstate); 
  Outstate.putint ("Curchoice", mcurcheckposition); 
 Outstate.putint ("Shownchoice", mshowncheckposition); @Override public void Onlistitemclick (ListView l, View v, int position, long ID) {showdetails (position); 
   /** * Display ListView Item Details/void showdetails (int index) {mcurcheckposition = index; 
 
   Getlistview (). setitemchecked (index, true); 
    if (mshowncheckposition!= mcurcheckposition) {detailsfragment df = detailsfragment.newinstance (index); 
    Fragmenttransaction ft = Getfragmentmanager (). BeginTransaction (); 
    Ft.replace (R.id.details, DF); 
    Ft.settransition (Fragmenttransaction.transit_fragment_fade); 
    Ft.commit (); 
   mshowncheckposition = index; 

 }  
 } 
 
}

Titlesfragment
Titlesfragment inherits from the fragment subclass Listfragment, uses a static array to populate the list, overrides the Onlistitemclick method, and ShowDetails the method to display the details of the ListView item.

Detailsfragment df = detailsfragment.newinstance (index);//Get details Fragment instance
fragmenttransaction ft = Getfragmentmanager (). BeginTransaction ()///Get Fragmenttransaction instance
ft.replace (r.id.details, DF); Use Detailsfragment instance
ft.settransition (fragmenttransaction.transit_fragment_fade);
Ft.commit ()/Submit

Take a look at Detailsfragment:

public class Detailsfragment extends Fragment {/** * Create a new instance of Detailsfragment, initialized to * sh  ow the text at ' index '. 
  */public static detailsfragment newinstance (int index) {detailsfragment f = new detailsfragment ();   
  Supply index input as an argument. 
  Bundle args = new Bundle (); 
  Args.putint ("index", index); 
  F.setarguments (args); 
 return F; 
  @Override public View Oncreateview (layoutinflater inflater, ViewGroup container, Bundle savedinstancestate) { 
  if (container = = null) {return null; 
  } scrollview scroller = new ScrollView (getactivity ()); 
 
  TextView Text = new TextView (getactivity ()); int padding = (int) typedvalue.applydimension (Typedvalue.complex_unit_dip, 4, Getactivity (). Getresources (). g 
  Etdisplaymetrics ()); 
  text.setpadding (padding, padding, padding, padding); 
  Scroller.addview (text); 
  Text.settext (Shakespeare.dialogue[getarguments (). GetInt ("index", 0)]); Return ScrolleR 

 } 
}

&NBSP
Detailsfragment uses the newinstance (int index) method to produce a detailsfragment instance and accepts an integer parameter, overloading the Oncreateview method to create the view.