Android_手机开发-Fragment、FragmentManager、FragmentTransaction的综合使用

南昌航空大学实验报告

2014 年05 月08 日

课程名称：Android 实验名称：Fragment、FragmentManager、FragmentTransaction的综合使用班级：姓名：同组人：

指导教师评定：签名：

一、实验目的

熟悉Fragment、FragmentManager、FragmentTransaction之间的综合使用；

熟悉Fragment之间的切换。

二、实验要求

1、编写一个聊天记录，要求如下：

使用RelativeLayout布局，Button、EditText、ListView、TextView等控件实现简单布局；

重写onCreateView方法；

编写点击监听器（Onclicklistener和OnItemClickListener）；

实现简单Fragment切换。

●检查布局是否可以在虚拟机显示

●点击按钮是否可用

●简单Fragment切换是否可以正常使用

编写测试程序。

三、实验步骤

①、

1.先编写RelativeLayout实现Fragment的主页面；

2.编写activity extends Fragment初始化按钮；

3.编写监听器，实现Fragment之间的切换；

4.测试切换是否可正常使用。

四、参考源代码

activity_main.xml

android:id="@+id/fragment_content"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:background="@drawable/f">

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="vertical"

android:layout_alignParentBottom="true"

>

android:id="@+id/activity_str"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/hello_world"/>

android:id="@+id/send_activity"

android:layout_width="100dp"

android:layout_height="50dp"

android:text="Send"/>

android:id="@+id/record"

android:layout_width="100dp"

android:layout_height="50dp"

android:text="聊天记录"/>

android:id="@+id/strs"

android:layout_width="100dp"

android:layout_height="50dp"

android:text="常用语"/>

Fragment1.xml

android:id="@+id/fragment_1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/hello_world"/>

Fragment2.xml

android:id="@+id/changyongyu"

android:layout_width="match_parent"

android:layout_height="130dp">

listview_item.xml

android:id="@+id/item"

android:layout_height="10dp"

android:layout_width="match_parent"

android:textSize="9sp"

/>

record_fragment.xml

android:id="@+id/title"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="聊天记录"

android:gravity="center"

android:layout_alignParentTop="true"

android:layout_centerHorizontal="true"

/>

android:layout_width="fill_parent"

android:layout_height="200dp"

android:background="@drawable/i"

android:layout_below="@id/title"

>

android:id="@+id/record"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/hello_world"/>

Fragment.java

public class Fragment extends android.support.v4.app.Fragment{ @Override

public void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

}

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

// TODO Auto-generated method stub

View contentView = inflater.inflate(https://www.360docs.net/doc/bf13518697.html,yout.fragment1, null);

TextView title = (TextView) contentView.findViewById(R.id.fragment_1);

title.setText("my first fragment");

return contentView;

}

}

Fragment2.java

public class Fragment2 extends Fragment{

private EditText edit;

private Button button;

private ListView listView;

private String [] strs;

private FragmentManager manager;

private FragmentTransaction transaction;

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

// TODO Auto-generated method stub

View contentView = inflater.inflate(https://www.360docs.net/doc/bf13518697.html,yout.fragment2, null);

manager = getFragmentManager();

transaction = manager.beginTransaction();

Fragment f1 = new Fragment();

transaction.add(R.id.fragment_content, f1);

listView = (ListView) contentView.findViewById(R.id.changyongyu);

SimpleAdapter adapter = new SimpleAdapter(getActivity().getApplicationContext(),

getData(), https://www.360docs.net/doc/bf13518697.html,yout.listview_item, new String[]{"common"}, new int []{R.id.item});

listView.setAdapter(adapter);

return contentView;

}

private ArrayList> getData(){

ArrayList> list = new ArrayList>();

strs = new String []{

"Hello!","Hi!","Nice to meet you!","Nice to meet you,too!","What are you doing!","How are you!",

};

for(int i=0;i

HashMap map = new HashMap();

map.put("common", strs[i]);

list.add(map);

}

return list;

}

@Override

public void onResume() {

super.onResume();

listView.setOnItemClickListener(new Listener().itemListener);

};

public class Listener{

public OnItemClickListener itemListener = new OnItemClickListener() {

@Override

public void onItemClick(AdapterView arg0, View arg1, int position,

long arg3) {

// TODO Auto-generated method stub

com.example.fragment.Fragment record = new com.example.fragment.Fragment();

transaction = manager.beginTransaction();

transaction.replace(R.id.fragment_content, record);

transaction.addToBackStack(null);

https://www.360docs.net/doc/bf13518697.html,mit();

String str = strs[position];

EditText text = (EditText)getActivity().findViewById(R.id.activity_str);

text.setText(str);

}

};

}

}

RecordFragment.java

public class RecordFragment extends Fragment{

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

// TODO Auto-generated method stub

View contentView = inflater.inflate(https://www.360docs.net/doc/bf13518697.html,yout.record_fragment, null);

TextView record = (TextView) contentView.findViewById(R.id.record);

String str = getActivity().getIntent().getStringExtra("str");

record.setText(str);

return contentView;

}

}

MainActivity.java

public class MainActivity extends FragmentActivity {

//private StringBuffer aStr = new StringBuffer("");

private EditText activityStr;

private FragmentManager manager;

private FragmentTransaction transaction;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(https://www.360docs.net/doc/bf13518697.html,yout.activity_main);

Button send = (Button) findViewById(R.id.send_activity);

activityStr = (EditText) findViewById(R.id.activity_str);

send.setOnClickListener(sendListener);

// FrameLayout content = (FrameLayout) findViewById(R.id.fragment_content);

manager = getSupportFragmentManager();

transaction = manager.beginTransaction();

Fragment f1 = new Fragment();

transaction.add(R.id.fragment_content, f1);

https://www.360docs.net/doc/bf13518697.html,mit();

Button record = (Button) findViewById(R.id.record);

Button strs = (Button) findViewById(R.id.strs);

strs.setOnClickListener(strListener);

record.setOnClickListener(recordListener);

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

private OnClickListener sendListener = new OnClickListener() {

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

TextView f1 = (TextView) findViewById(R.id.fragment_1);

// aStr = aStr.append(f1.getText().toString());

String message = activityStr.getText().toString();

StringBuffer str = new StringBuffer();

str = str.append(getIntent().getStringExtra("str")).append(message).append("\n");

String text = null;

if(str.length()>200){

text = str.toString().substring(str.length()-200, str.length());

}else {

text = str.toString();

}

getIntent().putExtra("str", str.toString());

f1.setText(text);

}

};

private OnClickListener recordListener = new OnClickListener() {

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

RecordFragment record = new RecordFragment();

transaction = manager.beginTransaction();

transaction.replace(R.id.fragment_content, record);

transaction.addToBackStack(null);

https://www.360docs.net/doc/bf13518697.html,mit();

}

};

private OnClickListener strListener = new OnClickListener() {

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

Fragment2 str = new Fragment2();

transaction = manager.beginTransaction();

transaction.replace(R.id.fragment_content, str);

transaction.addToBackStack(null);

https://www.360docs.net/doc/bf13518697.html,mit();

}

};

}

五、实验结果

六、 实验体会

1、掌握Fragment 、FragmentManager 、FragmentTransaction 之间的综合使用；

2、掌握Fragment 之间的切换机制；

3、理解Activity 的生命周期，确定在哪触发监听事件。