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my_fragment.xml

<RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android"                 xmlns:tools="https://schemas.android.com/tools"                 android:layout_width="match_parent"                 android:layout_height="match_parent"                 tools:context=".MainActivity">      <RelativeLayout             android:id="@+id/ly_top_bar"             android:layout_width="match_parent"             android:layout_height="48dp"            >          <TextView                 android:id="@+id/topBar"                 android:layout_width="match_parent"                 android:layout_height="match_parent"                 android:layout_centerInParent="true"                 android:gravity="center"                 android:textSize="18sp"                 android:textColor="#000"                 android:text="信息"/>           <View                 android:layout_width="match_parent"                 android:layout_height="2px"                 android:background="#C0C0C0"                 android:layout_alignParentBottom="true"/>      </RelativeLayout>        <LinearLayout             android:id="@+id/ly_tab_bar"             android:layout_width="match_parent"             android:layout_height="56dp"             android:layout_alignParentBottom="true"             android:background="#C0C0C0"             android:orientation="horizontal">          <TextView                 android:id="@+id/txt_channel"                 android:layout_width="0dp"                 android:layout_height="match_parent"                 android:layout_weight="1"                 android:background="#FFF"                 android:drawablePadding="3dp"                 android:drawableTop="@drawable/tab_menu_channel"                 android:gravity="center"                 android:padding="5dp"                 android:text="提醒"                 android:textColor="@drawable/tab_menu_text"                 android:textSize="16sp" />          <TextView                 android:id="@+id/txt_message"                 android:layout_width="0dp"                 android:layout_height="match_parent"                 android:layout_weight="1"                 android:background="#FFF"                 android:drawablePadding="3dp"                 android:drawableTop="@drawable/tab_menu_message"                 android:gravity="center"                 android:padding="5dp"                 android:text="消息"                 android:textColor="@drawable/tab_menu_text"                 android:textSize="16sp" />          <TextView                 android:id="@+id/txt_better"                 android:layout_width="0dp"                 android:layout_height="match_parent"                 android:layout_weight="1"                 android:background="#FFF"                 android:drawablePadding="3dp"                 android:drawableTop="@drawable/tab_menu_better"                 android:gravity="center"                 android:padding="5dp"                 android:text="我的"                 android:textColor="@drawable/tab_menu_text"                 android:textSize="16sp" />          <TextView                 android:id="@+id/txt_setting"                 android:layout_width="0dp"                 android:layout_height="match_parent"                 android:layout_weight="1"                 android:background="#FFF"                 android:drawablePadding="3dp"                 android:drawableTop="@drawable/tab_menu_setting"                 android:gravity="center"                 android:padding="5dp"                 android:text="设置"                 android:textColor="@drawable/tab_menu_text"                 android:textSize="16sp"/>      </LinearLayout>      <View             android:id="@+id/div_tab_bar"             android:layout_width="match_parent"             android:layout_height="2px"             android:background="#FFF"             android:layout_above="@id/ly_tab_bar"/>       <FrameLayout             android:background="#D3D3D3"             android:layout_width="match_parent"             android:layout_height="match_parent"             android:layout_below="@id/ly_top_bar"             android:layout_above="@id/div_tab_bar"             android:id="@+id/ly_content">      </FrameLayout>  </RelativeLayout> 

fg_content.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="https://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="#D3D3D3">      <TextView         android:id="@+id/txt_content"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:gravity="center"         android:textColor="#000"         android:textSize="20sp"/>  </LinearLayout> 

MainActivity类

package com.demo;   import android.content.Intent; import android.os.Build; import android.support.annotation.NonNull; import android.support.annotation.RequiresApi;  import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v4.view.ViewPager;  import android.support.v4.widget.DrawerLayout;  import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.DisplayMetrics;   import android.util.Log; import android.view.*;  import android.widget.*;  import java.util.ArrayList;  public class MainActivity extends AppCompatActivity implements View.OnClickListener{      private ViewPager pager1;     private ArrayList<View> list;     private MyPagerAdapter myPagerAdapter;      private ImageView img_cursor;     private TextView tv_one;     private TextView tv_two;     private TextView tv_three;     private int offSet = 0;  //移动条图片的偏移量     private int currIndex = 0;  //当前页     private int imageWidth = 0;  //移动条图片的宽度     private int one = 0;   //移动条滑动一页的距离     private int two = 0;   //移动条滑动两页的距离      private DrawerLayout drawerLayout;     private TextView ll_content;     private LinearLayout id_ll_left;     Button button;      private TextView txt_topbar;     private TextView txt_channel;     private TextView txt_message;     private TextView txt_better;     private TextView txt_setting;     private FrameLayout ly_content;      //Fragment Object     private MyFragment fg1,fg2,fg3,fg4;     private FragmentManager fManager;         @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.my_fragment);  //        init();         bindViews();           //getFragmentManager();不推荐使用         fManager = getSupportFragmentManager();         //模拟点击         txt_channel.performClick();          button = findViewById(R.id.button);         Intent intent =new Intent(MainActivity.this,SecondActivity.class);         startActivityForResult(intent,1);         }      private void bindViews() {         txt_topbar = findViewById(R.id.topBar);         txt_channel = findViewById(R.id.txt_channel);         txt_message =findViewById(R.id.txt_message);         txt_better =  findViewById(R.id.txt_better);         txt_setting =  findViewById(R.id.txt_setting);         ly_content = findViewById(R.id.ly_content);          txt_channel.setOnClickListener(this);         txt_message.setOnClickListener(this);         txt_better.setOnClickListener(this);         txt_setting.setOnClickListener(this);     }      //设置文本的选中状态     private void setSelected(){          txt_channel.setSelected(false);          txt_better.setSelected(false);          txt_message.setSelected(false);          txt_setting.setSelected(false);     }      //隐藏所有Fragment     private void hideAllFragment(FragmentTransaction transaction){         if(fg1!=null) transaction.hide(fg1);         if(fg2!=null) transaction.hide(fg2);         if(fg3!=null) transaction.hide(fg3);         if(fg4!=null) transaction.hide(fg4);      }      @Override     public void onPageScrolled(int i, float v, int i1) {      }      @Override     public void onPageSelected(int i) {      }      @Override     public void onPageScrollStateChanged(int i) {      }      @Override     public void onClick(View view) {          FragmentTransaction fragmentTransaction = fManager.beginTransaction();         hideAllFragment(fragmentTransaction);         switch (view.getId()){             case R.id.txt_channel:                 setSelected();                 txt_channel.setSelected(true);                 if(fg1==null){                     fg1 = new MyFragment("first Fragment");                     fragmentTransaction.add(R.id.ly_content,fg1);                 }                 else{                     fragmentTransaction.show(fg1);                 }                 break;             case  R.id.txt_message:                 setSelected();                 txt_message.setSelected(true);                 if(fg2==null){                     fg2 = new MyFragment("second Fragment");                     fragmentTransaction.add(R.id.ly_content,fg2);                 }                 else{                     fragmentTransaction.show(fg2);                 }                 break;             case R.id.txt_better:                 setSelected();                 txt_better.setSelected(true);                 if(fg3==null){                     fg3 = new MyFragment("third Fragment");                     fragmentTransaction.add(R.id.ly_content,fg3);                 }                 else{                     fragmentTransaction.show(fg3);                 }                 break;             case R.id.txt_setting:                 setSelected();                 txt_setting.setSelected(true);                 if(fg4==null){                     fg4 = new MyFragment("forth Fragment");                     fragmentTransaction.add(R.id.ly_content,fg4);                 }                 else{                     fragmentTransaction.show(fg4);                 }                 break;         }         fragmentTransaction.commit();      }    }  

自定义Fragment类

package com.demo;  import android.annotation.SuppressLint; import android.content.Context; import android.os.Bundle; import android.support.annotation.NonNull; 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.TextView;   @SuppressLint("ValidFragment") public class MyFragment extends Fragment {      private String content;      public MyFragment(String content) {         this.content = content;     }      @Nullable     @Override     public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {         View view = inflater.inflate(R.layout.fg_content,null);         TextView textView = (TextView) view.findViewById(R.id.txt_content);         textView.setText(content);          return  view;     } }  

效果

完整代码下载地址