Fragment的四种跳转方式

本文主要记录了关于fragment的四种跳转方式:  

1、从同一个Activiy的一个Fragment跳转到另外一个Fragment
2、从一个Activity的Fragment跳转到另外一个Activity
3、从一个Activity跳转到另外一个Activity的Fragment上
4、从一个Activity的Fragment跳转到另外一个Activity的Fragment上

 

写这篇文章只是一个简单的记录,当初我学这里的时候看别人的文章总是觉得云里雾里的,后来自己也觉得差不多可以了,于是写下这篇博客,也是记录自己的学习过程。

首先新建一个项目,然后新建两个活动MainActivity、OtherActivity。
在MainActivity的布局文件中写一个子布局:

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="vertical"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent">
 6  
 7  
 8     <FrameLayout
 9         android:id="@+id/fragment_container"
10         android:layout_width="match_parent"
11         android:layout_height="0dp"
12         android:layout_weight="1"/>
13  
14  
15 </LinearLayout>

新建一个my_fragment.xml布局与MyFragment类

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="vertical"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent">
 6  
 7     <TextView
 8         android:layout_width="match_parent"
 9         android:layout_height="wrap_content"
10         android:text="MyFragment"
11         android:textSize="40sp"
12         android:gravity="center_horizontal"/>
13  
14     <Button
15         android:id="@+id/my_button"
16         android:layout_width="wrap_content"
17         android:layout_height="wrap_content"
18         android:textAllCaps="false"
19         android:text="To YourFragment"/>
20  
21     <Button
22         android:id="@+id/my_other"
23         android:layout_width="wrap_content"
24         android:layout_height="wrap_content"
25         android:textAllCaps="false"
26         android:text="To OtherActivity"/>
27  
28 </LinearLayout>

MyFragment类就暂时省略了,后面会贴出所有代码。
在MainActivity中先添加进一个Fragment进行最开始的展示(压栈式添加)

 1 public class MainActivity extends AppCompatActivity {
 2  
 3     @Override
 4     protected void onCreate(Bundle savedInstanceState) {
 5         super.onCreate(savedInstanceState);
 6         setContentView(R.layout.activity_main);
 7         getSupportFragmentManager()
 8                 .beginTransaction()
 9                 .replace(R.id.fragment_container,new MyFragment())
10                 .addToBackStack(null)
11                 .commit();
12  
13     }
14 }

从同一个Activiy的一个Fragment跳转到另外一个Fragment

这个跳转与上面初始显示Fragment类似。
新建your_fragment.xml布局与YourFragment类。

 1 public class YourFragment extends Fragment {
 2     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
 3         View contentView;
 4         contentView = inflater.inflate(R.layout.your_fragment, container, false);
 5         return contentView;
 6     }
 7  
 8     @Override
 9     public void onActivityCreated(@Nullable Bundle savedInstanceState) {
10         super.onActivityCreated(savedInstanceState);
11         Button myReturn = (Button) getActivity().findViewById(R.id.my_return);
12         myReturn.setOnClickListener(new View.OnClickListener() {
13             //返回到上一个Fragment(同一个Activity中)
14             @Override
15             public void onClick(View v) {
16                 getActivity().getSupportFragmentManager().popBackStack();
17             }
18         });
19     }
20 }

your_fragment.xml就暂时先省略了,最后会贴出全部代码。

跳转部分代码如下,通过点击按钮跳转:

 1 myButton.setOnClickListener(new View.OnClickListener() {
 2             @Override
 3             public void onClick(View v) {
 4                 /* 一、从同一个Activity的一个Fragment跳到另外一个Fragment*/
 5                 //压栈式跳转
 6                 getActivity().getSupportFragmentManager()
 7                         .beginTransaction()
 8                         .replace(R.id.fragment_container, new YourFragment(), null)
 9                         .addToBackStack(null)
10                         .commit();
11  
12             }
13         });

从一个Activity的Fragment跳转到另外一个Activity

此跳转与Activity之间的跳转十分相似,只要引用上下文的时候,改成getActivity()即可。

跳转关键代码:

 1 myOther.setOnClickListener(new View.OnClickListener() {
 2             /*
 3              二、从一个Activity的Fragment跳转到另外一个Activity(等同于Activity之间的跳转(上下文是getActivity))
 4              */
 5             @Override
 6             public void onClick(View v) {
 7                 Intent intent = new Intent(getActivity(),OtherActivity.class);
 8                 startActivity(intent);
 9             }
10         });

从一个Activity跳转到另外一个Activity的Fragment上

我们要从OtherActivity跳转到MainActivity的YourFragment上去:
首先,我们在OtherActivity中的跳转事件中给MainActivity传递一个参数,命名为id:

 1 Intent intent = new Intent(OtherActivity.this, MainActivity.class); 2 intent.putExtra("id",1); 3 startActivity(intent); 

然后,我们在MainActivity里接收id值,对值进行判断,如果正确进行跳转操作:

1 int id = getIntent().getIntExtra("id", 0);
2 if (id == 1) {      
3      getSupportFragmentManager()
4        .beginTransaction()
5        .replace(R.id.fragment_container,new YourFragment())
6        .addToBackStack(null)
7        .commit(); 
8 }

从一个Activity的Fragment跳转到另外一个Activity的Fragment上

新建other_fragment.xml布局作为OtherActivity的一个Fragment。

这种跳转与第三种跳转极为类似,我们只需要将上面的

 1 Intent intent = new Intent(OtherActivity.this, MainActivity.class); 

Intent intent = new Intent(OtherActivity.this, MainActivity.class);

关键代码如下:

 1 public void onActivityCreated(@Nullable Bundle savedInstanceState) {
 2         super.onActivityCreated(savedInstanceState);
 3         Button ToButton = (Button) getActivity().findViewById(R.id.to_button);
 4         ToButton.setOnClickListener(new View.OnClickListener() {
 5             
 6             @Override
 7             public void onClick(View v) {
 8                 Intent intent = new Intent(getActivity(), MainActivity.class);
 9                 intent.putExtra("id",1);
10                 startActivity(intent);
11             }
12         });
13     }

所有代码文件

最后附上所有的代码文件。  
MainActivity:

 1 package com.example.fragment_activity_skiptest;
 2  
 3 import android.content.Intent;
 4 import android.support.v7.app.AppCompatActivity;
 5 import android.os.Bundle;
 6 import android.view.View;
 7  
 8 public class MainActivity extends AppCompatActivity {
 9  
10     @Override
11     protected void onCreate(Bundle savedInstanceState) {
12         super.onCreate(savedInstanceState);
13         setContentView(R.layout.activity_main);
14         getSupportFragmentManager()
15                 .beginTransaction()
16                 .replace(R.id.fragment_container,new MyFragment())
17                 .addToBackStack(null)
18                 .commit();
19         int id = getIntent().getIntExtra("id", 0);
20         if (id == 1) {
21             getSupportFragmentManager()
22                     .beginTransaction()
23                     .replace(R.id.fragment_container,new YourFragment())
24                     .addToBackStack(null)
25                     .commit();
26         }
27  
28     }
29 }

MyFragment:

 1 package com.example.fragment_activity_skiptest;
 2  
 3 import android.content.Intent;
 4 import android.os.Bundle;
 5 import android.support.annotation.Nullable;
 6 import android.support.v4.app.Fragment;
 7 import android.view.LayoutInflater;
 8 import android.view.View;
 9 import android.view.ViewGroup;
10 import android.widget.Button;
11  
12  
13 public class MyFragment extends Fragment {
14  
15     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
16         View contentView;
17             contentView = inflater.inflate(R.layout.my_fragment, container, false);
18  
19         return contentView;
20     }
21  
22     @Override
23     public void onActivityCreated(@Nullable Bundle savedInstanceState) {
24         super.onActivityCreated(savedInstanceState);
25         Button myButton = (Button) getActivity().findViewById(R.id.my_button);
26  
27         Button myOther = (Button) getActivity().findViewById(R.id.my_other);
28         myButton.setOnClickListener(new View.OnClickListener() {
29             @Override
30             public void onClick(View v) {
31                 /** 一、从同一个Activity的一个Fragment跳到另外一个Fragment*/
32                 //压栈式跳转
33                 getActivity().getSupportFragmentManager()
34                         .beginTransaction()
35                         .replace(R.id.fragment_container, new YourFragment(), null)
36                         .addToBackStack(null)
37                         .commit();
38  
39             }
40         });
41         myOther.setOnClickListener(new View.OnClickListener() {
42             /**
43              二、从一个Activity的Fragment跳转到另外一个Activity(等同于Activity之间的跳转(上下文是getActivity))
44              */
45             @Override
46             public void onClick(View v) {
47                 Intent intent = new Intent(getActivity(),OtherActivity.class);
48                 startActivity(intent);
49             }
50         });
51     }
52 }

OtherActivity:

 1 package com.example.fragment_activity_skiptest;
 2  
 3 import android.content.Intent;
 4 import android.support.v7.app.AppCompatActivity;
 5 import android.os.Bundle;
 6 import android.view.View;
 7 import android.widget.Button;
 8  
 9 public class OtherActivity extends AppCompatActivity {
10  
11     @Override
12     protected void onCreate(Bundle savedInstanceState) {
13         super.onCreate(savedInstanceState);
14         setContentView(R.layout.activity_other);
15         Button button = (Button)findViewById(R.id.to_MainActivity_YourFragment);
16         Button button_back = (Button)findViewById(R.id.back);
17         Button button_fm = (Button)findViewById(R.id.to_OtherFragment);
18         button.setOnClickListener(new View.OnClickListener() {
19             /*从一个Activity跳转到另外一个Activity的Fragment上
20             例如我们要从OtherActivity跳转到MainActivity的YourFragment上去:
21             首先,我们在OtherActivity中的跳转事件中给MainActivity传递一个名为id的参数:
22             然后,我们在MainActivity里接收id值,对值进行判断,如果正确进行跳转操作:
23             */
24             @Override
25             public void onClick(View v) {
26                 Intent intent = new Intent(OtherActivity.this, MainActivity.class);
27                 intent.putExtra("id",1);
28                 startActivity(intent);
29  
30             }
31         });
32         button_back.setOnClickListener(new View.OnClickListener() {
33             @Override
34             public void onClick(View v) {
35                 finish();
36             }
37         });
38         button_fm.setOnClickListener(new View.OnClickListener() {
39             @Override
40             public void onClick(View v) {
41                 getSupportFragmentManager()
42                         .beginTransaction()
43                         .replace(R.id.frame_container, new OtherFragment(), null)
44                         .addToBackStack(null)
45                         .commit();
46             }
47         });
48     }
49 }

OtherFragment:

package com.example.fragment_activity_skiptest;
 
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
 
 
public class OtherFragment extends Fragment {
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View contentView;
        contentView = inflater.inflate(R.layout.other_fragment, container, false);
        return contentView;
    }
 
    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        Button ToButton = (Button) getActivity().findViewById(R.id.to_button);
        ToButton.setOnClickListener(new View.OnClickListener() {
            /*4、从一个Activity的Fragment跳转到另外一个Activity的Fragment上
            这种跳转与第三种跳转极为类似,我们只需要将
            Intent intent = new Intent(OtherActivity.this, MainActivity.class);
            书写在对应的Fragment中,将OtherActivity.this更改为getActivity(),其他不用改变,几个完成跳转.
            */
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(getActivity(), MainActivity.class);
                intent.putExtra("id",1);
                startActivity(intent);
            }
        });
    }
}

YourFragment:

package com.example.fragment_activity_skiptest;
 
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
 
 
public class YourFragment extends Fragment {
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View contentView;
        contentView = inflater.inflate(R.layout.your_fragment, container, false);
        return contentView;
    }
 
    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        Button myReturn = (Button) getActivity().findViewById(R.id.my_return);
        myReturn.setOnClickListener(new View.OnClickListener() {
            //返回到上一个Fragment(同一个Activity中)
            @Override
            public void onClick(View v) {
                getActivity().getSupportFragmentManager().popBackStack();
            }
        });
    }
}

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
 
 
    <FrameLayout
        android:id="@+id/fragment_container"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>
 
 
</LinearLayout>

activity_other.xml:

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="vertical"
 4     android:id="@+id/activity_other"
 5     android:layout_width="match_parent"
 6     android:layout_height="match_parent"
 7     android:background="#d0ff05"
 8     >
 9  
10     <FrameLayout
11         android:id="@+id/frame_container"
12         android:layout_width="match_parent"
13         android:layout_height="0dp"
14         android:layout_weight="1">
15         <LinearLayout
16             android:orientation="vertical"
17             android:layout_width="match_parent"
18             android:layout_height="match_parent">
19  
20             <TextView
21                 android:layout_width="match_parent"
22                 android:layout_height="wrap_content"
23                 android:text="OtherActivity"
24                 android:textSize="50sp"
25                 android:gravity="center_horizontal"/>
26  
27             <Button
28                 android:id="@+id/to_MainActivity_YourFragment"
29                 android:layout_width="wrap_content"
30                 android:layout_height="wrap_content"
31                 android:text="To MainActivity YourFragment"
32                 android:textAllCaps="false"/>
33  
34             <Button
35                 android:id="@+id/to_OtherFragment"
36                 android:layout_width="wrap_content"
37                 android:layout_height="wrap_content"
38                 android:text="To OtherFragment"
39                 android:textAllCaps="false"/>
40  
41             <Button
42                 android:id="@+id/back"
43                 android:layout_width="wrap_content"
44                 android:layout_height="wrap_content"
45                 android:text="back"/>
46  
47         </LinearLayout>
48     </FrameLayout>
49  
50  
51  
52 </LinearLayout>

my_fragment.xml:

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="vertical"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent">
 6  
 7     <TextView
 8         android:layout_width="match_parent"
 9         android:layout_height="wrap_content"
10         android:text="MyFragment"
11         android:textSize="40sp"
12         android:gravity="center_horizontal"/>
13  
14     <Button
15         android:id="@+id/my_button"
16         android:layout_width="wrap_content"
17         android:layout_height="wrap_content"
18         android:textAllCaps="false"
19         android:text="To YourFragment"/>
20  
21     <Button
22         android:id="@+id/my_other"
23         android:layout_width="wrap_content"
24         android:layout_height="wrap_content"
25         android:textAllCaps="false"
26         android:text="To OtherActivity"/>
27  
28 </LinearLayout>

other_fragment.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ffffff">
 
 
 
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="OtherFragment"
        android:textSize="40sp"
        android:gravity="center_horizontal"/>
 
    <Button
        android:id="@+id/to_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAllCaps="false"
        android:text="To MainActivity YourFragment"/>
 
</LinearLayout>

your_fragment.xml:

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="vertical"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent"
 6     android:background="#0fa345">
 7  
 8     <TextView
 9         android:layout_width="match_parent"
10         android:layout_height="wrap_content"
11         android:gravity="center_horizontal"
12         android:textSize="40sp"
13         android:text="YourFragment"/>
14  
15     <Button
16         android:id="@+id/my_return"
17         android:layout_width="wrap_content"
18         android:layout_height="wrap_content"
19         android:text="RETURN"
20         />
21  
22 </LinearLayout>

参考:Android Fragment的四种跳转

我的CSDN:Fragment的四种跳转方式_SY_XLR的博客-CSDN博客_fragment跳转

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