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>
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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