Android学习笔记之fragment的静态加载和动态加载

浏览数：57 / 时间：2015年06月11日

1.xml布局文件：

main.xml

 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     android:layout_width="match_parent"
 3     android:layout_height="match_parent" >
 4     
 5     <LinearLayout 
 6         android:id="@+id/linearLayout"
 7         android:layout_width="match_parent"
 8         android:layout_height="wrap_content"
 9         android:orientation="vertical"></LinearLayout>
10     
11     
12     <RadioGroup 
13         android:id="@+id/radioGroup"
14         android:layout_width="match_parent"
15         android:layout_height="wrap_content"
16         android:orientation="horizontal"
17         android:layout_alignParentBottom="true"
18   >
19         
20         <RadioButton
21             android:id="@+id/first"
22             android:layout_width="0dp"
23             android:layout_height="wrap_content"
24             android:layout_weight="1"
25             
26             android:button="@null"
27             android:drawableTop="@drawable/ic_launcher"
28             android:gravity="center_horizontal"
29             android:text="静态加载" />
30         
31         <RadioButton
32             android:id="@+id/secnod"
33             android:layout_width="0dp"
34             android:layout_height="wrap_content"
35             android:layout_weight="1"
36             
37             android:button="@null"
38             android:drawableTop="@drawable/ic_launcher"
39             android:gravity="center_horizontal"
40             android:text="动态加载" />
41         
42         <RadioButton
43             android:id="@+id/three"
44             android:layout_width="0dp"
45             android:layout_height="wrap_content"
46             android:layout_weight="1"
47            
48             android:button="@null"
49             android:drawableTop="@drawable/ic_launcher"
50             android:gravity="center_horizontal"
51             android:text="静态加载" />
52         
53         <RadioButton
54             android:id="@+id/four"
55             android:layout_width="0dp"
56             android:layout_height="wrap_content"
57             android:layout_weight="1"
58             
59             android:button="@null"
60             android:drawableTop="@drawable/ic_launcher"
61             android:gravity="center_horizontal"
62             android:text="静态加载" />
63     </RadioGroup>
64 
65 </RelativeLayout>

main2.xml

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     android:layout_width="match_parent"
 3     android:layout_height="match_parent"
 4     android:orientation="vertical" >
 5     
 6     <fragment 
 7         android:id="@+id/fragment"
 8         android:layout_width="wrap_content"
 9         android:layout_height="wrap_content"
10         android:name="com.test.fragment.Myfragment"/>
11     
12 
13 </LinearLayout>

fragment.xml

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     android:layout_width="match_parent"
 3     android:layout_height="match_parent"
 4     android:orientation="vertical" >
 5     
 6     <TextView 
 7         android:id="@+id/textView1"
 8         android:layout_width="wrap_content"
 9         android:layout_height="wrap_content"/>
10     
11     <Button 
12         android:id="@+id/button1"
13         android:layout_width="wrap_content"
14         android:layout_height="wrap_content"
15         android:text="改变"/>
16 
17 </LinearLayout>

2.java代码:

MainActivity.class

public class MainActivity extends Activity implements OnCheckedChangeListener {
    
    private RadioGroup rg1;                

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        rg1  = (RadioGroup) findViewById(R.id.radioGroup);
        rg1.setOnCheckedChangeListener(this);
    }

    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
        // TODO Auto-generated method stub
        switch (checkedId) {
        case R.id.first:{
            Intent it = new Intent(this,MainActivity2.class);
            startActivity(it);
            break;
            }
        
        case R.id.secnod:{
            Myfragment2 fragment2 = new Myfragment2();
            FragmentManager fragmentManager =getFragmentManager();
            FragmentTransaction beginTransaction =fragmentManager.beginTransaction();
            beginTransaction.add(R.id.linearLayout, fragment2);
            beginTransaction.addToBackStack(null);
            beginTransaction.commit();
            break;
        }
        }
        }
    }

MainActivity2.class

 1 package com.test.fragment;
 2 
 3 import android.app.Activity;
 4 import android.os.Bundle;
 5 import android.view.View;
 6 import android.view.View.OnClickListener;
 7 import android.widget.Button;
 8 import android.widget.TextView;
 9 
10 public class MainActivity2 extends Activity {
11     
12     private TextView tv1;
13     
14     @Override
15     protected void onCreate(Bundle savedInstanceState) {
16         // TODO Auto-generated method stub
17         super.onCreate(savedInstanceState);
18         setContentView(R.layout.main2);
19         
20         Button b1 = (Button) findViewById(R.id.button1);
21          tv1 = (TextView) findViewById(R.id.textView1);
22         b1.setText("change");
23         b1.setOnClickListener(new OnClickListener() {
24             
25             @Override
26             public void onClick(View v) {
27                 // TODO Auto-generated method stub
28                 tv1.setText("苦尽甘来");
29             }
30         });
31     }
32 
33 }

Myfragment.class

 1 package com.test.fragment;
 2 
 3 import android.app.Fragment;
 4 import android.os.Bundle;
 5 import android.view.LayoutInflater;
 6 import android.view.View;
 7 import android.view.ViewGroup;
 8 import android.widget.TextView;
 9 
10 public class Myfragment extends Fragment{
11     @Override
12     public View onCreateView(LayoutInflater inflater, ViewGroup container,
13             Bundle savedInstanceState) {
14         // TODO Auto-generated method stub
15         
16         
17         View view = inflater.inflate(R.layout.fragment, container, false);    
18         
19         TextView tv1 =(TextView) view. findViewById(R.id.textView1);
20         tv1.setText("静态加载");
21         return view;
22     }
23 
24 }

Myfragment.class

 1 package com.test.fragment;
 2 
 3 import android.app.Fragment;
 4 import android.os.Bundle;
 5 import android.view.LayoutInflater;
 6 import android.view.View;
 7 import android.view.ViewGroup;
 8 import android.widget.TextView;
 9 
10 public class Myfragment2 extends Fragment{
11     @Override
12     public View onCreateView(LayoutInflater inflater, ViewGroup container,
13             Bundle savedInstanceState) {
14         // TODO Auto-generated method stub
15         
16         
17         View view = inflater.inflate(R.layout.fragment, container, false);    
18         
19         TextView tv1 =(TextView) view. findViewById(R.id.textView1);
20         tv1.setText("动态加载");
21         return view;
22     }
23 
24 }