Fragment实现底部导航栏

一.实现的效果图以及工程目录结构:

二.部分代码展示：

1.主要代码：

  1 package com.example.mywechat;
  2 import android.app.Fragment;
  3 import android.annotation.SuppressLint;
  4 import android.app.Activity;
  5 import android.app.FragmentManager;
  6 import android.app.FragmentTransaction;
  7 import android.os.Bundle;
  8 import android.util.Log;
  9 import android.view.View;
 10 import android.view.Window;
 11 import android.widget.ImageButton;
 12 import android.widget.LinearLayout;
 13 
 14 @SuppressLint("RestrictedApi")
 15 public class MainActivity extends Activity implements View.OnClickListener {
 16     private LinearLayout mTabWeixin;
 17     private LinearLayout mTabFrd;
 18     private LinearLayout mTabAddress;
 19     private LinearLayout mTabSettings;
 20 
 21     private ImageButton mImgWeixin;
 22     private ImageButton mImgFrd;
 23     private ImageButton mImgAddress;
 24     private ImageButton mImgSettings;
 25 
 26     private Fragment mTab01 = new weixinFragment();
 27     private Fragment mTab02 = new frgFragment();
 28     private Fragment mTab03 = new contactFragment();
 29     private Fragment mTab04 = new settingFragment();
 30 
 31     private FragmentManager fm;
 32 
 33     @Override
 34     protected void onCreate(Bundle savedInstanceState) {
 35 
 36         requestWindowFeature(Window.FEATURE_NO_TITLE);
 37         super.onCreate(savedInstanceState);
 38         setContentView(R.layout.activity_main);
 39         initView();
 40         initEvent();
 41         initFragment();
 42         SetSelect(0);
 43 
 44     }
 45 
 46     private void initFragment(){
 47         fm = getFragmentManager();
 48         FragmentTransaction transaction = fm.beginTransaction();
 49         transaction.add(R.id.id_content,mTab01);
 50         transaction.add(R.id.id_content,mTab02);
 51         transaction.add(R.id.id_content,mTab03);
 52         transaction.add(R.id.id_content,mTab04);
 53         transaction.commit();
 54     }
 55 
 56     private void initEvent(){
 57         mTabWeixin.setOnClickListener(this);
 58         mTabFrd.setOnClickListener(this);
 59         mTabAddress.setOnClickListener(this);
 60         mTabSettings.setOnClickListener(this);
 61     }
 62 
 63     private void initView(){
 64         mTabWeixin =findViewById(R.id.id_tab_weixin);
 65         mTabFrd = findViewById(R.id.id_tab_frd);
 66         mTabAddress = findViewById(R.id.id_tab_contact);
 67         mTabSettings = findViewById(R.id.id_tab_settings);
 68 
 69         mImgWeixin = findViewById(R.id.id_tab_weixin_img);
 70         mImgFrd = findViewById(R.id.id_tab_frd_img);
 71         mImgAddress = findViewById(R.id.id_tab_contact_img);
 72         mImgSettings = findViewById(R.id.id_tab_settings_img);
 73 
 74     }
 75 
 76     private void SetSelect(int i){
 77         FragmentTransaction transaction = fm.beginTransaction();
 78         hideFragment(transaction);
 79         switch (i){
 80             case 0:
 81                 Log.d("setSelect","1");
 82                 transaction.show(mTab01);
 83                 mImgWeixin.setImageResource(R.drawable.tab_weixin_pressed);
 84                 break;
 85             case 1:
 86                 Log.d("setSelect","2");
 87                 transaction.show(mTab02);
 88                 mImgFrd.setImageResource(R.drawable.tab_find_frd_pressed);
 89                 break;
 90             case 2:
 91                 Log.d("setSelect: ","3" );
 92                 transaction.show(mTab03);
 93                 mImgAddress.setImageResource(R.drawable.tab_address_pressed);
 94                 break;
 95             case 3:
 96                 Log.d("setSelect: ", "4 ");
 97                 transaction.show(mTab04);
 98                 mImgSettings.setImageResource(R.drawable.tab_settings_pressed);
 99                 break;
100             default:
101                 break;
102 
103             }
104             transaction.commit();
105     }
106 
107     private void hideFragment (FragmentTransaction transaction){
108         transaction.hide(mTab01);
109         transaction.hide(mTab02);
110         transaction.hide(mTab03);
111         transaction.hide(mTab04);
112     }
113 
114     @Override
115     public void onClick(View v) {
116         Log.d("onClick", "1");
117         resetImgs();
118         switch (v.getId()){
119             case R.id.id_tab_weixin:
120 
121                 SetSelect(0);
122                 break;
123             case R.id.id_tab_frd:
124 
125                 SetSelect(1);
126                 break;
127             case R.id.id_tab_contact:
128 
129                 SetSelect(2);
130                 break;
131             case R.id.id_tab_settings:
132 
133                 SetSelect(3);
134                 break;
135             default:
136                 break;
137         }
138     }
139     //切换图片至暗色
140     public void resetImgs(){
141         mImgWeixin.setImageResource(R.drawable.tab_weixin_normal);
142         mImgFrd.setImageResource(R.drawable.tab_find_frd_normal);
143         mImgAddress.setImageResource(R.drawable.tab_address_normal);
144         mImgSettings.setImageResource(R.drawable.tab_settings_normal);
145 
146     }
147 }

MainActivity

其他三个Frament(frdFrament, contactFragment, settingFragment)照葫芦画瓢。

 1 package com.example.mywechat;
 2 
 3 import android.os.Bundle;
 4 
 5 import android.app.Fragment ;
 6 import android.view.LayoutInflater;
 7 import android.view.View;
 8 import android.view.ViewGroup;
 9 
10 
11 /**
12  * A simple {@link Fragment} subclass.
13  */
14 public class weixinFragment extends Fragment {
15 
16     public weixinFragment() {
17         // Required empty public constructor
18     }
19 
20     @Override
21     public View onCreateView(LayoutInflater inflater, ViewGroup container,
22                              Bundle savedInstanceState) {
23         // Inflate the layout for this fragment
24         return inflater.inflate(R.layout.tab01, container, false);
25     }
26 }

weixinFragment

2.layout布局文件部分：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="70dp"
 5     android:background="#32393C"
 6     android:orientation="vertical"
 7     android:gravity="bottom">
 8     <TextView
 9         android:id="@+id/textView"
10         android:layout_width="wrap_content"
11         android:layout_height="wrap_content"
12         android:layout_gravity="center_horizontal"
13         android:text="@string/app_name"
14         android:textColor="#FFFFFF"
15         android:textSize="30sp" />
16 </LinearLayout>

top.xml

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3     xmlns:app="http://schemas.android.com/apk/res-auto"
  4     android:layout_width="match_parent"
  5     android:layout_height="100dp"
  6     android:background="@drawable/bottom_bar"
  7     android:layout_gravity="bottom"
  8     android:baselineAligned="false">
  9 
 10     <LinearLayout
 11         android:id="@+id/id_tab_weixin"
 12         android:layout_width="0dp"
 13         android:layout_height="match_parent"
 14         android:layout_weight="1"
 15         android:orientation="vertical">
 16 
 17         <ImageButton
 18             android:id="@+id/id_tab_weixin_img"
 19             android:layout_width="match_parent"
 20             android:layout_height="wrap_content"
 21             android:layout_marginTop="20dp"
 22             android:background="#32393C"
 23             android:clickable="false"
 24             app:srcCompat="@drawable/tab_weixin_pressed" />
 25 
 26         <TextView
 27             android:clickable="false"
 28             android:id="@+id/textView2"
 29             android:layout_width="match_parent"
 30             android:layout_height="wrap_content"
 31             android:gravity="center_horizontal"
 32             android:textColor="#fff"
 33             android:textSize="15sp"
 34             android:text="微信" />
 35     </LinearLayout>
 36 
 37     <LinearLayout
 38         android:id="@+id/id_tab_frd"
 39         android:layout_width="0dp"
 40         android:layout_height="match_parent"
 41         android:layout_weight="1"
 42         android:orientation="vertical">
 43 
 44         <ImageButton
 45             android:id="@+id/id_tab_frd_img"
 46             android:layout_width="match_parent"
 47             android:layout_height="wrap_content"
 48             android:layout_marginTop="20dp"
 49             android:background="#32393C"
 50             android:clickable="false"
 51             app:srcCompat="@drawable/tab_find_frd_normal" />
 52 
 53         <TextView
 54             android:clickable="false"
 55             android:id="@+id/textView3"
 56             android:layout_width="match_parent"
 57             android:layout_height="wrap_content"
 58             android:gravity="center_horizontal"
 59             android:textColor="#fff"
 60             android:textSize="15sp"
 61             android:text="朋友" />
 62     </LinearLayout>
 63 
 64     <LinearLayout
 65         android:id="@+id/id_tab_contact"
 66         android:layout_width="0dp"
 67         android:layout_height="match_parent"
 68         android:layout_weight="1"
 69         android:orientation="vertical">
 70 
 71         <ImageButton
 72             android:id="@+id/id_tab_contact_img"
 73             android:layout_width="match_parent"
 74             android:layout_height="wrap_content"
 75             android:layout_marginTop="20dp"
 76             android:background="#32393C"
 77             android:clickable="false"
 78             app:srcCompat="@drawable/tab_address_normal" />
 79 
 80         <TextView
 81             android:clickable="false"
 82             android:id="@+id/textView4"
 83             android:layout_width="match_parent"
 84             android:layout_height="wrap_content"
 85             android:gravity="center_horizontal"
 86             android:textColor="#fff"
 87             android:textSize="15sp"
 88             android:text="通讯录" />
 89     </LinearLayout>
 90 
 91     <LinearLayout
 92         android:id="@+id/id_tab_settings"
 93         android:layout_width="0dp"
 94         android:layout_height="match_parent"
 95         android:layout_weight="1"
 96         android:orientation="vertical">
 97 
 98         <ImageButton
 99             android:id="@+id/id_tab_settings_img"
100             android:layout_width="match_parent"
101             android:layout_height="wrap_content"
102             android:layout_marginTop="20dp"
103             android:background="#32393C"
104             android:clickable="false"
105             app:srcCompat="@drawable/tab_settings_normal" />
106 
107         <TextView
108             android:clickable="false"
109             android:id="@+id/textView5"
110             android:layout_width="match_parent"
111             android:layout_height="wrap_content"
112             android:gravity="center_horizontal"
113             android:textColor="#fff"
114             android:textSize="15sp"
115             android:text="设置" />
116     </LinearLayout>
117 
118 
119 </LinearLayout>

bottom.xml

在activity_main.xml中使用

<include layout="@layout/top"/>     <include layout="@layout/bottom"/>

引入头部top.xml文件和底部bottom.xml文件

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="vertical" android:layout_width="match_parent"
 4     android:layout_height="match_parent">
 5     <include layout="@layout/top"/>
 6     <FrameLayout
 7         android:id="@+id/id_content"
 8         android:layout_width="match_parent"
 9         android:layout_height="0dp"
10         android:layout_weight="1">
11     </FrameLayout>
12     <include layout="@layout/bottom"/>
13 </LinearLayout>

activity_main

3.图片文件:

三.项目源码：

https://gitee.com/Skipink/AndroidDemo

https://github.com/Skipink/AndroidDemo

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原文地址：https://www.cnblogs.com/hiker19/p/12514536.html