Android 动态添加Fragment的实例代码

<?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".fragment1activity">
<fragment
android:layout_width="match_parent"
android:layout_height="100dp"
android:name="com.example.administrator.jreduch06.fragment.topfragment"
android:id="@+id/top_fragment"
android:layout_alignparenttop="true"
android:layout_alignparentend="true">
</fragment>
<fragment
android:layout_width="match_parent"
android:layout_height="300dp"
android:id="@+id/leftfragment"
android:name="com.example.administrator.jreduch06.fragment.leftfragment"
android:layout_below="@+id/top_fragment"
android:layout_alignparentstart="true">
</fragment>
<framelayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/fl"
android:layout_alignparentstart="true"
android:layout_below="@+id/leftfragment">
</framelayout>
</relativelayout>

package com.example.administrator.jreduch06;
import android.os.bundle;
import android.support.v7.app.appcompatactivity;
import android.support.v4.app.fragment;
import com.example.administrator.jreduch06.fragment.firstfragment;
import com.example.administrator.jreduch06.fragment.leftfragment;
import com.example.administrator.jreduch06.fragment.secondfragment;
public class fragment1activity extends appcompatactivity implements leftfragment.myinterface {
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_fragment1);
}
@override
public void onchangefragment(int which) {
if(which==1){
fragment fragment1=new firstfragment();
getsupportfragmentmanager()
.begintransaction()
.replace(r.id.fl, fragment1)
.commit();
}else if(which==2){
fragment fragment2=new secondfragment();
getsupportfragmentmanager()
.begintransaction()
.replace(r.id.fl,fragment2)
.commit();
}
}
}

<?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.administrator.jreduch06.fragment2activity">
<fragment
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/one_fragment"
android:name="com.example.administrator.jreduch06.fragmentcallback.onefragment"
>
</fragment>
<framelayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/fl2"
android:layout_below="@+id/linearlatout"
>
</framelayout>
</relativelayout>

package com.example.administrator.jreduch06;
import android.support.v4.app.fragment;
import android.support.v7.app.appcompatactivity;
import android.os.bundle;
import com.example.administrator.jreduch06.fragment.firstfragment;
import com.example.administrator.jreduch06.fragment.secondfragment;
import com.example.administrator.jreduch06.fragmentcallback.onefragment;
public class fragment2activity extends appcompatactivity
implements onefragment.onfragmentinteractionlistener{
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_fragment2);
}
@override
public void changefragment(int which) {
if(which==1){
fragment fragment1=new firstfragment();
getsupportfragmentmanager()
.begintransaction()
.replace(r.id.fl2, fragment1)
.commit();
}else if(which==2){
fragment fragment2=new secondfragment();
getsupportfragmentmanager()
.begintransaction()
.replace(r.id.fl2,fragment2)
.commit();
}
}
}

<framelayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.administrator.jreduch06.fragment.firstfragment"> 
<textview
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:textsize="30sp"
android:id="@+id/tv"
android:text="我是fragment1"
android:layout_gravity="center_horizontal|bottom" />
</framelayout>

package com.example.administrator.jreduch06.fragment;
import android.os.bundle;
import android.support.v4.app.fragment;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;
import com.example.administrator.jreduch06.r;
/**
* a simple {@link fragment} subclass.
*/
public class secondfragment extends fragment {
public secondfragment() {
// required empty public constructor
}
@override
public view oncreateview(layoutinflater inflater, viewgroup container,
bundle savedinstancestate) {
// inflate the layout for this fragment
return inflater.inflate(r.layout.fragment_second, container, false);
}
}

<framelayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.administrator.jreduch06.fragment.secondfragment">
<textview
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:textsize="30sp"
android:text="我是fragment2" />
</framelayout>

package com.example.administrator.jreduch06.fragment;
import android.os.bundle;
import android.support.v4.app.fragment;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;
import com.example.administrator.jreduch06.r;
/**
* a simple {@link fragment} subclass.
*/
public class firstfragment extends fragment {
public secondfragment() {
// required empty public constructor
}
@override
public view oncreateview(layoutinflater inflater, viewgroup container,
bundle savedinstancestate) {
// inflate the layout for this fragment
return inflater.inflate(r.layout.fragment_first, container, false);
}
}

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#bece0d"
tools:context="com.example.administrator.jreduch06.fragment.leftfragment">
<button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="第一个fragment"
android:id="@+id/bt1"
/>
<button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="第二个fragment"
android:id="@+id/bt2"
/>
<button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="callback1"
android:id="@+id/bt3"
/>
<button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="callback2"
android:id="@+id/bt4"
/>
<button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="隐藏"
android:id="@+id/bt5"
/>
<button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="显示"
android:id="@+id/bt6"
/>
</linearlayout>

package com.example.administrator.jreduch06.fragment;
import android.content.context;
import android.os.bundle;
import android.support.v4.app.fragment;
import android.support.v4.app.fragmentmanager;
import android.support.v4.app.fragmenttransaction;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;
import android.widget.button;
import android.widget.toast;
import com.example.administrator.jreduch06.r;
/**
* a simple {@link fragment} subclass.
*/
public class leftfragment extends fragment {
private fragment fragment1;
private fragment fragment2;
private myinterface myinterface ;
public leftfragment() {
}
@override
public void onattach(context context) {
super.onattach(context);
if (context instanceof myinterface) {
myinterface= (myinterface) context;
} else {
throw new runtimeexception(context.tostring()
+ " must implement onfragmentinteractionlistener");
}
}
@override
public view oncreateview(layoutinflater inflater, viewgroup container,
bundle savedinstancestate) {
view view=inflater.inflate(r.layout.fragment_left, container, false);
button bt1= (button) view.findviewbyid(r.id.bt1);
button bt2= (button) view.findviewbyid(r.id.bt2);
button bt3= (button) view.findviewbyid(r.id.bt3);
button bt4= (button) view.findviewbyid(r.id.bt4);
button bt5= (button) view.findviewbyid(r.id.bt5);
button bt6= (button) view.findviewbyid(r.id.bt6);
bt1.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
toast.maketext(getcontext(), "点击了按钮1", toast.length_short).show();
fragment1=new firstfragment();
fragmentmanager fm=getfragmentmanager();
fragmenttransaction fr=fm.begintransaction();
fr.replace(r.id.fl,fragment1);
fr.commit();
}
});
bt2.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
fragment2 = new secondfragment();
fragmentmanager fm = getfragmentmanager();
fragmenttransaction fr = fm.begintransaction();
fr.replace(r.id.fl, fragment2);
fr.commit();
}
});
bt3.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
myinterface.onchangefragment(1);
}
});
bt4.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
myinterface.onchangefragment(2);
}
});
bt5.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
if(fragment1!=null&& !fragment1.ishidden()){
getfragmentmanager().begintransaction()
.hide(fragment1).commit();
}
if(fragment2!=null&& !fragment2.ishidden()){
getfragmentmanager().begintransaction()
.hide(fragment2).commit();
}
}
});
bt6.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
if(fragment1!=null&&fragment1.ishidden()){
getfragmentmanager().begintransaction()
.show(fragment1).commit();
}
if(fragment2!=null&& fragment2.ishidden()){
getfragmentmanager().begintransaction()
.hide(fragment2).commit();
}
}
});
return view;
}
public interface myinterface {
void onchangefragment(int which);
}
}