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Four Jump Ways of Fragment
2022-08-06 03:33:00 【SY_XLR】
This article mainly records aboutfragmentof four jumps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
Writing this article is just a simple record,When I was studying here, I always felt foggy when I read other people's articles,Later, I felt that it was almost enough,于是写下这篇博客,Also record your own learning process.
首先新建一个项目,Then create two new activitiesMainActivity、OtherActivity.
在MainActivityWrite a sub-layout in the layout file：
<?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>新建一个my_fragment.xml布局与MyFragment类
<?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">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="MyFragment"
android:textSize="40sp"
android:gravity="center_horizontal"/>
<Button
android:id="@+id/my_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAllCaps="false"
android:text="To YourFragment"/>
<Button
android:id="@+id/my_other"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAllCaps="false"
android:text="To OtherActivity"/>
</LinearLayout>MyFragmentThe class is temporarily omitted,All code will be posted later.
在MainActivityAdd one firstFragmentDo the initial presentation（Push-to-stack addition）
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.fragment_container,new MyFragment())
.addToBackStack(null)
.commit();
}
}从同一个Activiy的一个Fragment跳转到另外一个Fragment
This jump is initially shown aboveFragment类似.
新建your_fragment.xml布局与YourFragment类.
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();
}
});
}
}your_fragment.xmlIt is omitted for now,All the code will be posted at the end.
跳转部分代码如下,Jump by clicking the button：
myButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
/** 一、从同一个Activity的一个Fragment跳到另外一个Fragment*/
//Push stack jump
getActivity().getSupportFragmentManager()
.beginTransaction()
.replace(R.id.fragment_container, new YourFragment(), null)
.addToBackStack(null)
.commit();
}
});从一个Activity的Fragment跳转到另外一个Activity
This jump is related toActivityThe jumps between are very similar,Just refer to the context,改成getActivity()即可.
Jump key code：
myOther.setOnClickListener(new View.OnClickListener() {
/**
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）)
*/
@Override
public void onClick(View v) {
Intent intent = new Intent(getActivity(),OtherActivity.class);
startActivity(intent);
}
});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OtherActivitygiven in the jump event in MainActivity传递一个参数,命名为id：
Intent intent = new Intent(OtherActivity.this, MainActivity.class);
intent.putExtra("id",1);
startActivity(intent);
然后,我们在MainActivity里接收id值,对值进行判断,If the jump operation is performed correctly：
int id = getIntent().getIntExtra("id", 0);
if (id == 1) {
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.fragment_container,new YourFragment())
.addToBackStack(null)
.commit();
}
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.
This jump is very similar to the third jump,我们只需要将上面的
Intent intent = new Intent(OtherActivity.this, MainActivity.class);written in the correspondingFragment中,将OtherActivity.this更改为getActivity(),其他不用改变,to complete the jump.
关键代码如下：
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Button ToButton = (Button) getActivity().findViewById(R.id.to_button);
ToButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(getActivity(), MainActivity.class);
intent.putExtra("id",1);
startActivity(intent);
}
});
}所有代码文件
Finally attach all the code files.
MainActivity:
package com.example.fragment_activity_skiptest;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.fragment_container,new MyFragment())
.addToBackStack(null)
.commit();
int id = getIntent().getIntExtra("id", 0);
if (id == 1) {
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.fragment_container,new YourFragment())
.addToBackStack(null)
.commit();
}
}
}
MyFragment:
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 MyFragment extends Fragment {
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View contentView;
contentView = inflater.inflate(R.layout.my_fragment, container, false);
return contentView;
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Button myButton = (Button) getActivity().findViewById(R.id.my_button);
Button myOther = (Button) getActivity().findViewById(R.id.my_other);
myButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
/** 一、从同一个Activity的一个Fragment跳到另外一个Fragment*/
//Push stack jump
getActivity().getSupportFragmentManager()
.beginTransaction()
.replace(R.id.fragment_container, new YourFragment(), null)
.addToBackStack(null)
.commit();
}
});
myOther.setOnClickListener(new View.OnClickListener() {
/**
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）)
*/
@Override
public void onClick(View v) {
Intent intent = new Intent(getActivity(),OtherActivity.class);
startActivity(intent);
}
});
}
}OtherActivity:
package com.example.fragment_activity_skiptest;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class OtherActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_other);
Button button = (Button)findViewById(R.id.to_MainActivity_YourFragment);
Button button_back = (Button)findViewById(R.id.back);
Button button_fm = (Button)findViewById(R.id.to_OtherFragment);
button.setOnClickListener(new View.OnClickListener() {
/*从一个Activity跳转到另外一个Activity的Fragment上
例如我们要从OtherActivity跳转到MainActivity的YourFragment上去：
首先,我们在OtherActivitygiven in the jump event in MainActivity传递一个名为id的参数：
然后,我们在MainActivity里接收id值,对值进行判断,If the jump operation is performed correctly：
*/
@Override
public void onClick(View v) {
Intent intent = new Intent(OtherActivity.this, MainActivity.class);
intent.putExtra("id",1);
startActivity(intent);
}
});
button_back.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});
button_fm.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.frame_container, new OtherFragment(), null)
.addToBackStack(null)
.commit();
}
});
}
}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
This jump is very similar to the third jump,我们只需要将
Intent intent = new Intent(OtherActivity.this, MainActivity.class);
written in the correspondingFragment中,将OtherActivity.this更改为getActivity(),其他不用改变,Several completed jumps.
*/
@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:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:id="@+id/activity_other"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#d0ff05"
>
<FrameLayout
android:id="@+id/frame_container"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="OtherActivity"
android:textSize="50sp"
android:gravity="center_horizontal"/>
<Button
android:id="@+id/to_MainActivity_YourFragment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="To MainActivity YourFragment"
android:textAllCaps="false"/>
<Button
android:id="@+id/to_OtherFragment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="To OtherFragment"
android:textAllCaps="false"/>
<Button
android:id="@+id/back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="back"/>
</LinearLayout>
</FrameLayout>
</LinearLayout>
my_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">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="MyFragment"
android:textSize="40sp"
android:gravity="center_horizontal"/>
<Button
android:id="@+id/my_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAllCaps="false"
android:text="To YourFragment"/>
<Button
android:id="@+id/my_other"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAllCaps="false"
android:text="To OtherActivity"/>
</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:
<?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="#0fa345">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:textSize="40sp"
android:text="YourFragment"/>
<Button
android:id="@+id/my_return"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="RETURN"
/>
</LinearLayout>边栏推荐
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