Fragment实现界面跳转的效果

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:tools="http://schemas.android.com/tools"
 4     android:id="@+id/activity_main"
 5     android:layout_width="match_parent"
 6     android:layout_height="match_parent"
 7     android:orientation="vertical"
 8     tools:context="com.example.zhoushasha.myapplication.MainActivity">
 9 
10     <LinearLayout
11         android:id="@+id/show"
12         android:layout_width="match_parent"
13         android:layout_height="0dp"
14         android:orientation="vertical"
15         android:layout_weight="1">
16 
17     </LinearLayout>
18     <LinearLayout
19         android:layout_width="match_parent"
20         android:layout_height="0dp"
21         android:orientation="vertical"
22         android:layout_weight="1">
23         <Button
24             android:id="@+id/next"
25             android:layout_width="wrap_content"
26             android:layout_height="wrap_content"
27             android:layout_gravity="center"
28             android:text="no way"
29             android:onClick="onClick"/>
30 
31 
32 
33 
34 
35     </LinearLayout>
36 
37 </LinearLayout>

fragment界面的布局

<FrameLayout 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"
    tools:context="layout.yesFragment">

    <!-- TODO: Update blank fragment layout -->
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:text="all roads to china"
        android:textSize="30dp"/>
</FrameLayout>

部分Java实现代码

 1   @Override
 2     protected void onCreate(Bundle savedInstanceState) {
 3         super.onCreate(savedInstanceState);
 4         setContentView(R.layout.activity_main);
 5         FirstFragment firstFragment= new FirstFragment();
 6 
 7         FragmentManager manager = getFragmentManager();
 8         FragmentTransaction transaction = manager.beginTransaction();
 9 
10         firstFragment = new FirstFragment();
11         transaction.add(R.id.next, firstFragment);
12         transaction.commit();
13 
14     }
15 
16 
17     public void onClick(View view) {
18         if (view.getId() == R.id.next) {
19             tc = true;
20             if (qh) {
21                 FragmentManager manager = getFragmentManager();
22                 FragmentTransaction transaction = manager.beginTransaction();
23                 if (secondFragment == null) {
24                     secondFragment   secondFragment= new secondFragment();
25                     transaction.replace(R.id.next, secondFragment);
26                     transaction.commit();
27                     qh = false;
28                 } else {
29                     transaction.replace(R.id.next, secondFragment);
30                     transaction.commit();
31                     qh = false;
32                 }
33             } else {
34                 Toast.makeText(this, "This is second fragment", Toast.LENGTH_SHORT).show();
35             }
36 
37         }
38     }
39 
40     public boolean onKeyDown(int keyCode, KeyEvent event) {
41 
42         if (event.getKeyCode() == KeyEvent.KEYCODE_BACK && tc) {
43 
44             FragmentManager manager = getFragmentManager();
45             FragmentTransaction transaction = manager.beginTransaction();
46             FirstFragment firstFragment=new FirstFragment();
47             qh = true;
48             tc = false;
49             transaction.replace(R.id.next, firstFragment);
50             transaction.commit();
51             return false;
52         } else {
53             finish();
54         }
55         return super.onKeyDown(keyCode, event);
56 
57 
58     }
59 
60 }