1.fragment1布局及代码

布局

<"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>

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 { @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(); } } }

2.fragment2布局及代码

布局

<"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>

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 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(); } } }

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"> <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>

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 } @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); } }

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"> <TextView android: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 } @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); } }

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"> <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>

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() { } @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); } }

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

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