fragment使用的简单示例

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实现如下效果

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:baselineAligned="false"    android:orientation="horizontal" >    <fragment        android:id="@+id/articleFragment"        android:name="com.example.fragmentdemo.IndexFragment"        android:layout_width="0dp"        android:layout_height="match_parent"        android:layout_weight="1" />    <fragment        android:id="@+id/contentFragment"        android:name="com.example.fragmentdemo.ContentFragment"        android:layout_width="0dp"        android:layout_height="match_parent"        android:layout_weight="2" /></LinearLayout>

content_fragment.xml

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.fragmentdemo.MainActivity" >    <TextView        android:id="@+id/contentTxt"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textSize="50sp" /></RelativeLayout>

index_fragment.xml

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.fragmentdemo.MainActivity" >    <ListView        android:id="@+id/listView"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></RelativeLayout>

list_item.xml

<TextView xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/textView"    android:textSize="50sp"    android:layout_width="fill_parent"    android:layout_height="fill_parent" ></TextView>

ContentFragment .ja

package com.example.fragmentdemo;import android.annotation.SuppressLint;import android.app.Fragment;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;@SuppressLint("NewApi")public class ContentFragment extends Fragment {@Overridepublic void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// TODO Auto-generated method stub// 　 第一个是resource ID，指明了当前的Fragment对应的资源文件；// 　　第二个参数是父容器控件；// 　　第三个布尔值参数表明是否连接该布局和其父容器控件，在这里的情况设置为false，// 因为系统已经插入了这个布局到父控件，设置为true将会产生多余的一个View// Group。return inflater.inflate(R.layout.content_fragment, container, false);}@Overridepublic void onPause() {// TODO Auto-generated method stubsuper.onPause();}}

IndexFragment.java

package com.example.fragmentdemo;import android.annotation.SuppressLint;import android.app.Fragment;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;@SuppressLint("NewApi")public class IndexFragment extends Fragment {@Overridepublic void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// TODO Auto-generated method stub// 　 第一个是resource ID，指明了当前的Fragment对应的资源文件；// 　　第二个参数是父容器控件；// 　　第三个布尔值参数表明是否连接该布局和其父容器控件，在这里的情况设置为false，// 因为系统已经插入了这个布局到父控件，设置为true将会产生多余的一个View// Group。return inflater.inflate(R.layout.index_fragment, container, false);}@Overridepublic void onPause() {// TODO Auto-generated method stubsuper.onPause();}}

MainActivity.java

package com.example.fragmentdemo;import java.util.ArrayList;import android.os.Bundle;import android.support.v4.app.FragmentActivity;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.TextView;public class MainActivity extends FragmentActivity {private ListView listView;private TextView contentTxt;private ArrayList<String> content;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);listView = (ListView) findViewById(R.id.listView);contentTxt = (TextView) findViewById(R.id.contentTxt);ArrayList<String> name = new ArrayList<String>();for (int i = 0; i < 10; i++) {name.add(i + "");}content = new ArrayList<String>();for (int i = 0; i < 10; i++) {content.add("" + i);}ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this, R.layout.list_item, name);listView.setAdapter(adapter);listView.setOnItemClickListener(ListViewItemClickListener);}OnItemClickListener ListViewItemClickListener = new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position,long id) {// TODO Auto-generated method stubcontentTxt.setText("点击的数字是：" + content.get(position));}};}

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