EventBus(三)---Fragment案例通讯应用

来源：互联网发布：windows server cd 2 编辑：程序博客网时间：2024/05/20 09:06

MainActivity

package com.angeldevil.eventbusdemo;import android.os.Bundle;import android.support.v4.app.FragmentActivity;public class MainActivity extends FragmentActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}}

activity_main.xml主界面--左右两边均为fragment界面

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:baselineAligned="false"    android:divider="?android:attr/dividerHorizontal"    android:orientation="horizontal"    android:showDividers="middle" >    <fragment        android:id="@+id/item_list"        android:name="com.angeldevil.eventbusdemo.ItemListFragment"        android:layout_width="0dip"        android:layout_height="match_parent"        android:layout_weight="1" />    <fragment        android:id="@+id/item_detail_container"        android:name="com.angeldevil.eventbusdemo.ItemDetailFragment"        android:layout_width="0dip"        android:layout_height="match_parent"        android:layout_weight="2" /></LinearLayout>

Item

package com.angeldevil.eventbusdemo;import java.util.ArrayList;import java.util.List;/** *  * 这个类的作用： Item有id、content2个属性 类包含一个静态集合ITEMS 初始化6个Item元素 *  */public class Item {public String id;public String content;public static List<Item> ITEMS = new ArrayList<Item>();static {// Add 6 sample items.addItem(new Item("1", "Item 1"));addItem(new Item("2", "Item 2"));addItem(new Item("3", "Item 3"));addItem(new Item("4", "Item 4"));addItem(new Item("5", "Item 5"));addItem(new Item("6", "Item 6"));}private static void addItem(Item item) {ITEMS.add(item);}public Item(String id, String content) {this.id = id;this.content = content;}@Overridepublic String toString() {return content;}}

Event

package com.angeldevil.eventbusdemo;import java.util.List;/** * 对外提供一个返回Items集合的方法 */public class Event {/** 列表加载事件 */public static class ItemListEvent {private List<Item> items;public ItemListEvent(List<Item> items) {this.items = items;}public List<Item> getItems() {return items;}}}

接下来看左边部分ItemListFragment

package com.angeldevil.eventbusdemo;import android.os.Bundle;import android.support.v4.app.ListFragment;import android.view.View;import android.widget.ArrayAdapter;import android.widget.ListView;import com.angeldevil.eventbusdemo.Event.ItemListEvent;import de.greenrobot.event.EventBus;public class ItemListFragment extends ListFragment {@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);// RegisterEventBus.getDefault().register(this);}@Overridepublic void onDestroy() {super.onDestroy();// UnregisterEventBus.getDefault().unregister(this);}@Overridepublic void onViewCreated(View view, Bundle savedInstanceState) {super.onViewCreated(view, savedInstanceState);// 开启线程加载列表new Thread() {public void run() {try {Thread.sleep(2000); // 模拟延时// 发布事件，在后台线程发的事件EventBus.getDefault().post(new ItemListEvent(Item.ITEMS));} catch (InterruptedException e) {e.printStackTrace();}};}.start();}/** * 在主线程更新ui界面 *  * @param event */public void onEventMainThread(ItemListEvent event) {setListAdapter(new ArrayAdapter<Item>(getActivity(),android.R.layout.simple_list_item_activated_1,android.R.id.text1, event.getItems()));}@Overridepublic void onListItemClick(ListView listView, View view, int position,long id) {super.onListItemClick(listView, view, position, id);EventBus.getDefault().post(getListView().getItemAtPosition(position));}}

ItemDetailFragment

package com.angeldevil.eventbusdemo;import android.os.Bundle;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import de.greenrobot.event.EventBus;public class ItemDetailFragment extends Fragment {private TextView tvDetail;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);// registerEventBus.getDefault().register(this);}@Overridepublic void onDestroy() {super.onDestroy();// UnregisterEventBus.getDefault().unregister(this);}/** List点击时会发送些事件，接收到事件后更新详情 */public void onEventMainThread(Item item) {if (item != null)tvDetail.setText(item.content);}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {View rootView = inflater.inflate(R.layout.fragment_item_detail,container, false);tvDetail = (TextView) rootView.findViewById(R.id.item_detail);return rootView;}}

fragment_item_detail.xml

<TextView xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/item_detail"    style="?android:attr/textAppearanceLarge"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:padding="16dp"    android:textIsSelectable="true"    tools:context="com.angeldevil.eventbusdemo.ItemDetailFragment" />

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