本文主要記錄了關於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Act ...
本文主要記錄了關於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,當初我學這裡的時候看別人的文章總是覺得雲里霧裡的,後來自己也覺得差不多可以了,於是寫下這篇博客,也是記錄自己的學習過程。
首先新建一個項目,然後新建兩個活動MainActivity、OtherActivity。
在MainActivity的佈局文件中寫一個子佈局:
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佈局與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,後面會貼出所有代碼。
在MainActivity中先添加進一個Fragment進行最開始的展示(壓棧式添加)
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佈局與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 //返回到上一個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,最後會貼出全部代碼。
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 //壓棧式跳轉 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,只要引用上下文的時候,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(等同於Activity之間的跳轉(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 });
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傳遞一個參數,命名為id:
1 Intent intent = new Intent(OtherActivity.this, MainActivity.class); 2 intent.putExtra("id",1); 3 startActivity(intent);
然後,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佈局作為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 }
所有代碼文件
最後附上所有的代碼文件。
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、從同一個Activity的一個Fragment跳到另外一個Fragment*/ 32 //壓棧式跳轉 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(等同於Activity之間的跳轉(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 /*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的參數: 22 然後,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() { //返回到上一個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