一、效果
二、编码
(1)model类，存放书籍的相关信息
public class BookContent {
public static class Book{
public Integer id;
public String title;
public String desc;
public Book(Integer id,String title,String desc){
this.id = id;
this.title = title;
this.desc=desc;
}
@Override
public String
toString() {
return title;
}
}
public static List<Book> ITEMS =
new ArrayList<Book>();
public static Map<Integer,Book> ITEMS_MAP =
new HashMap<>();
static
{
addItem(
new Book(
1,
"疯狂Java讲义"
,
"一本全面、深入的Java学习图书，已被多家高校选做教材。"));
addItem(
new Book(
2,
"疯狂Android讲义"
,
"Android学习者的首选图书，常年占据京东、当当、 "
+
"亚马逊3大网站Android销量排行榜的榜首"));
addItem(
new Book(
3,
"轻量级Java EE企业应用实战"
,
"全面介绍Java EE开发的Struts 2、Spring 3、Hibernate 4框架"));
}
private static void addItem(Book book)
{
ITEMS.add(book);
ITEMS_MAP.put(book.id, book);
}
}
(2)创建Fragment需要重写如下onCreate()和onCreateView()，onCreate()是创建Fragment对象时初始化的方法，而onCreateView()是Fragment绘制界面回调的方法。
/**
* 呈现详细资料
* Created by Sean on 2017/2/3.
*/
public class BookDetailFragment extends Fragment {
public static final String ITEM_ID=
"item_id";
BookContent.Book book;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments().containsKey(ITEM_ID)){
book = BookContent.ITEMS_MAP.get(getArguments().getInt(ITEM_ID));
}
}
@Nullable
@Override
public View
onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_book_detail,
container,
false);
if (book!=
null){
((TextView)rootView.findViewById(R.id.book_title)).setText(book.title);
((TextView) rootView.findViewById(R.id.book_desc))
.setText(book.desc);
}
return rootView;
}
}
(3)目录页面使用ListFragment，无需重写onCreateView()方法，直接调用ListFragment的setAdapter()即可。
public class BookListFragment extends ListFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setListAdapter(
new ArrayAdapter<BookContent.Book>(getActivity(),
android.R.layout.simple_list_item_activated_1,
android.R.id.text1,BookContent.ITEMS));
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (!(context
instanceof Callbacks)){
throw new IllegalStateException(
"BookListFragment所在的Activity必须实现Callbacks接口!"
);
}
mCallback = (Callbacks) context;
}
@Override
public void onDetach() {
super.onDetach();
mCallback=
null;
}
@Override
public void onListItemClick(ListView l, View v,
int position,
long id) {
super.onListItemClick(l, v, position, id);
Log.d(
"BookListFragment",
"onItemSelected");
mCallback.onItemSeledted(BookContent.ITEMS.get(position).id);
}
public void setActivateOnItemClick(
boolean activateOnItemClick){
getListView().setChoiceMode(
activateOnItemClick?ListView.CHOICE_MODE_SINGLE:
ListView.CHOICE_MODE_NONE);
}
}
(4)Fragment同Activity通过回掉建立通信，并使用Fragment事务方式更新Fragment。
public Callbacks mCallback;
/**
* 负责与Activity进行通信
*/
public interface Callbacks{
public void onItemSeledted(Integer id);
}
@Override
public void onListItemClick(ListView l, View v,
int position,
long id) {
super.onListItemClick(l, v, position, id);
Log.d(
"BookListFragment",
"onItemSelected");
mCallback.onItemSeledted(BookContent.ITEMS.get(position).id);
}
public class MainActivity extends AppCompatActivity implements BookListFragment.Callbacks {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_book_twopane);
}
@Override
public void onItemSeledted(Integer id) {
Log.d(
"mainActivity",
"onItemSelected");
Bundle bundle =
new Bundle();
bundle.putInt(BookDetailFragment.ITEM_ID,id);
BookDetailFragment fragment =
new BookDetailFragment();
fragment.setArguments(bundle);
getFragmentManager().beginTransaction()
.replace(R.id.book_detail_container,fragment)
.commit();
}
}
(5)Fragment布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:divider="?android:attr/dividerHorizontal"
android:showDividers="middle">
<fragment
android:name="com.project.seanma.fragmetnttest.BookListFragment"
android:id="@+id/book_list"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" />
<FrameLayout
android:id="@+id/book_detail_container"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="3" />
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
style="?android:attr/textAppearanceLarge"
android:id="@+id/book_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp"/>
<TextView
style="?android:attr/textAppearanceMedium"
android:id="@+id/book_desc"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp"/>
</LinearLayout>
源码地址:https://github.com/codingma/FragmentTest
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