Fragment的四種跳轉方式-有解無憂

本文主要記錄了關于fragment的四種跳轉方式：

1、從同一個Activiy的一個Fragment跳轉到另外一個Fragment
2、從一個Activity的Fragment跳轉到另外一個Activity
3、從一個Activity跳轉到另外一個Activity的Fragment上
4、從一個Activity的Fragment跳轉到另外一個Activity的Fragment上

寫這篇文章只是一個簡單的記錄，當初我學這里的時候看別人的文章總是覺得云里霧里的，后來自己也覺得差不多可以了，于是寫下這篇博客，也是記錄自己的學習程序，

首先新建一個專案，然后新建兩個活動MainActivity、OtherActivity，
在MainActivity的布局檔案中寫一個子布局：

 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>

新建一個my_fragment.xml布局與MyFragment類

 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類就暫時省略了，后面會貼出所有代碼，
在MainActivity中先添加進一個Fragment進行最開始的展示（壓堆疊式添加）

 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 }

從同一個Activiy的一個Fragment跳轉到另外一個Fragment

這個跳轉與上面初始顯示Fragment類似，
新建your_fragment.xml布局與YourFragment類，

 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             //回傳到上一個Fragment（同一個Activity中）
14             @Override
15             public void onClick(View v) {
16                 getActivity().getSupportFragmentManager().popBackStack();
17             }
18         });
19     }
20 }

your_fragment.xml就暫時先省略了，最后會貼出全部代碼，

跳轉部分代碼如下,通過點擊按鈕跳轉：

 1 myButton.setOnClickListener(new View.OnClickListener() {
 2             @Override
 3             public void onClick(View v) {
 4                 /* 一、從同一個Activity的一個Fragment跳到另外一個Fragment*/
 5                 //壓堆疊式跳轉
 6                 getActivity().getSupportFragmentManager()
 7                         .beginTransaction()
 8                         .replace(R.id.fragment_container, new YourFragment(), null)
 9                         .addToBackStack(null)
10                         .commit();
11  
12             }
13         });

從一個Activity的Fragment跳轉到另外一個Activity

此跳轉與Activity之間的跳轉十分相似，只要參考背景關系的時候，改成getActivity()即可，

跳轉關鍵代碼：

 1 myOther.setOnClickListener(new View.OnClickListener() {
 2             /*
 3              二、從一個Activity的Fragment跳轉到另外一個Activity(等同于Activity之間的跳轉（背景關系是getActivity）)
 4              */
 5             @Override
 6             public void onClick(View v) {
 7                 Intent intent = new Intent(getActivity(),OtherActivity.class);
 8                 startActivity(intent);
 9             }
10         });

從一個Activity跳轉到另外一個Activity的Fragment上

我們要從OtherActivity跳轉到MainActivity的YourFragment上去：
首先，我們在OtherActivity中的跳轉事件中給MainActivity傳遞一個引數,命名為id：

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

然后，我們在MainActivity里接收id值,對值進行判斷，如果正確進行跳轉操作：

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 }

從一個Activity的Fragment跳轉到另外一個Activity的Fragment上

新建other_fragment.xml布局作為OtherActivity的一個Fragment，

這種跳轉與第三種跳轉極為類似，我們只需要將上面的

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

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

關鍵代碼如下：

 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     }

所有代碼檔案

最后附上所有的代碼檔案，
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、從同一個Activity的一個Fragment跳到另外一個Fragment*/
32                 //壓堆疊式跳轉
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、從一個Activity的Fragment跳轉到另外一個Activity(等同于Activity之間的跳轉（背景關系是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             /*從一個Activity跳轉到另外一個Activity的Fragment上
20             例如我們要從OtherActivity跳轉到MainActivity的YourFragment上去：
21             首先，我們在OtherActivity中的跳轉事件中給MainActivity傳遞一個名為id的引數：
22             然后，我們在MainActivity里接收id值,對值進行判斷，如果正確進行跳轉操作：
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、從一個Activity的Fragment跳轉到另外一個Activity的Fragment上
            這種跳轉與第三種跳轉極為類似，我們只需要將
            Intent intent = new Intent(OtherActivity.this, MainActivity.class);
            書寫在對應的Fragment中，將OtherActivity.this更改為getActivity()，其他不用改變，幾個完成跳轉.
            */
            @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() {
            //回傳到上一個Fragment（同一個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>

參考：Android Fragment的四種跳轉

我的CSDN：Fragment的四種跳轉方式_SY_XLR的博客-CSDN博客_fragment跳轉

轉載請註明出處，本文鏈接：https://www.uj5u.com/yidong/509731.html

標籤：Android

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