"Go" example based on the Android fragment feature

Original URL: http://blog.csdn.net/eyu8874521/article/details/8252216

Through 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 easier to do in the future , let's put a few pictures after the implementation:

The implementation of the function is very simple, but also the most basic, up and down is two fragment, above the fragment is a ListView, when clicked Item, the following fragment display the corresponding text details:

The specific implementation steps are as follows:

① Create the project Fragmentexam, the catalog view is as follows (add the demo of the previous fragmentpreference together):

②main.xml file layout, vertical two x Fragment, with <Fragment> Tag declaration

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2. <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
4. xmlns:tools="Http://schemas.android.com/tools"
6. android:layout_width="match_parent"
8. android:layout_height="match_parent"
10. tools:context=". Mainactivity "
12. android:orientation="vertical"
14. android:background="#7ecef4">
16. <fragment
18. android:name="com.example.fragementexam.FragementList"
20. android:id="@+id/frag_list"
22. android:layout_width="fill_parent"
24. android:layout_height="0DP"
26. android:layout_weight="2"/>
28. <fragment
30. android:name="Com.example.fragementexam.FragementDetails"
32. android:id="@+id/frag_detail"
34. android:layout_width="fill_parent"
36. android:layout_height="0DP"
38. android:layout_weight="1"/>
40. </linearlayout>

③fragmentlist.java code, which inherits the Listfragment, notes the introduction of the layout page using the Inflate method of Inflater in the Oncreateview method:

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2. Package com.example.fragementexam;
6. Import java.util.ArrayList;
8. Import Java.util.HashMap;
10. Import java.util.List;
12. Import Java.util.Map;
16. Import android.app.ListFragment;
18. Import Android.os.Bundle;
20. Import Android.util.Log;
22. Import Android.view.LayoutInflater;
24. Import Android.view.View;
26. Import Android.view.ViewGroup;
28. Import Android.widget.ListView;
30. Import Android.widget.SimpleAdapter;
34. Public class Fragementlist extends Listfragment {
36. private string[] values = new string[] { "dwarf", "human", "Night Elf", "dwarf", "Delaney",
38. "Werewolf"};
40. private int[] images = new int[] {r.drawable.gnome,
42. R.drawable.human, R.drawable.nightelf,
44. R.drawable.dwarf, R.drawable.draenei,
46. R.drawable.werewolf};
50. @Override
52. Public View Oncreateview (layoutinflater inflater, ViewGroup container,
54. Bundle savedinstancestate) {
58. return Inflater.inflate (R.layout.frag_list, container, false);
60. }
64. @Override
66. public void onactivitycreated (Bundle savedinstancestate) {
68. super.onactivitycreated (savedinstancestate);
72. list<map<string, object>> listItems = new arraylist<map<string, object>> ();
74. For (int i = 0; i < values.length; i++) {
76. map<string, object> listItem = new hashmap<string, object> ();
78. Listitem.put ("values", values[i]);
80. Listitem.put ("Images", images[i]);
82. Listitems.add (ListItem);
84. }
86. Simpleadapter adapter = New Simpleadapter (Getactivity (), ListItems,
88. R.layout.list_item, new string[] { "values", "Images"},
90. new int[] {r.id.txt_title, r.id.img});
92. Setlistadapter (adapter);
96. }
100. @Override
102. public void Onlistitemclick (ListView l, View v, int position, long id) {
104. //String item = (string) getlistadapter (). GetItem (position);
106. Fragementdetails Frag = (fragementdetails) Getfragmentmanager ()
108. . Findfragmentbyid (R.id.frag_detail);
110. if (frag! = null && frag.isinlayout ()) {
112. switch (position) {
114. Case 0:
116. Frag.settext (getString (r.string.gnome));
118. Break ;
120. case 1:
122. Frag.settext (getString (R.string.human));
124. Break ;
126. Case 2:
128. Frag.settext (getString (r.string.nightelf));
130. Break ;
132. Case 3:
134. Frag.settext (getString (R.string.dwarf));
136. Break ;
138. Case 4:
140. Frag.settext (getString (R.string.draenei));
142. Break ;
144. Case 5:
146. Frag.settext (getString (R.string.werewolf));
148. Break ;
150. }
152. }
156. LOG.I ("PDA", "position =" + position);
158. }
162. }

④fragementdetails.java code, this is relatively simple, there is a way to set TextView content, its layout page is just a TextView

[Java]View Plaincopy

2. Package com.example.fragementexam;
6. Import android.app.Fragment;
8. Import Android.os.Bundle;
10. Import Android.view.LayoutInflater;
12. Import Android.view.View;
14. Import Android.view.ViewGroup;
16. Import Android.widget.TextView;
22. Public class Fragementdetails extends Fragment {
26. @Override
28. Public View Oncreateview (layoutinflater inflater, ViewGroup container,
30. Bundle savedinstancestate) {
32. //TODO auto-generated method stub
34. return Inflater.inflate (R.layout.frag_detail, container,false);
36. }
40. public void SetText (String item) {
42. TextView txt = (TextView) GetView (). Findviewbyid (R.id.txt_detail);
44. Txt.settext (item);
46. }
52. }

The other part is some arrays, the definition of string, this demo, although simple, but the Android fragment aspects commonly used to do a review, if you write this word, in the future encounter similar projects should be better to cope with more, good, call it off!

"Go" example based on the Android fragment feature