Android 动态添加Fragment的实例代码

2019-12-12 05:44:41

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1.fragment1布局及代码

布局

<?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"><fragmentandroid: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><fragmentandroid: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><FrameLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"android:id="@+id/fl"android:layout_alignParentStart="true"android:layout_below="@+id/leftfragment"></FrameLayout></RelativeLayout>

代码

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 {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_fragment1);}@Overridepublic 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();}}}

2.fragment2布局及代码

布局

<?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"><fragmentandroid:layout_width="match_parent"android:layout_height="wrap_content"android:id="@+id/one_fragment"android:name="com.example.administrator.jreduch06.fragmentcallback.OneFragment"></fragment><FrameLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"android:id="@+id/fl2"android:layout_below="@+id/linearlatout"></FrameLayout></RelativeLayout>

代码：

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 AppCompatActivityimplements OneFragment.OnFragmentInteractionListener{@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_fragment2);}@Overridepublic 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();}}}

3.FirstFragment代码及布局

布局：

<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"> <TextViewandroid: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>

代码：

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}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// Inflate the layout for this fragmentreturn inflater.inflate(R.layout.fragment_second, container, false);}}

4.SecondFragment代码及布局

布局：

<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"><TextViewandroid:layout_width="match_parent"android:layout_height="match_parent"android:gravity="center"android:textSize="30sp"android:text="我是Fragment2" /></FrameLayout>

代码：

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}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// Inflate the layout for this fragmentreturn inflater.inflate(R.layout.fragment_first, container, false);}}

5.LeftFragment布局及代码

布局：

<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"><Buttonandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="第一个Fragment"android:id="@+id/bt1"/><Buttonandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="第二个Fragment"android:id="@+id/bt2"/><Buttonandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="callback1"android:id="@+id/bt3"/><Buttonandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="callback2"android:id="@+id/bt4"/><Buttonandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="隐藏"android:id="@+id/bt5"/><Buttonandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="显示"android:id="@+id/bt6"/></LinearLayout>

代码：

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() {}@Overridepublic void onAttach(Context context) {super.onAttach(context);if (context instanceof Myinterface) {myinterface= (Myinterface) context;} else {throw new RuntimeException(context.toString()+ " must implement OnFragmentInteractionListener");}}@Overridepublic 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() {@Overridepublic 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() {@Overridepublic 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() {@Overridepublic void onClick(View v) {myinterface.onchangeFragment(1);}});bt4.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {myinterface.onchangeFragment(2);}});bt5.setOnClickListener(new View.OnClickListener() {@Overridepublic 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() {@Overridepublic 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);}}

效果：

点击第一个按钮出现Fragment1.

点击第二个按钮出现Fragment2

点击第三个按钮出现Fragment1.（方法不同）

点击第四个按钮出现Fragment2.（方法不同）

点击隐藏，字条消失

点击显示，字条出现