本文实例为大家分享了Android实现底部导航栏功能的具体代码，供大家参考，具体内容如下

实验效果：

（1）在drawable文件夹下新建tab_menu_bg.xml文件，具体代码如下：

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_selected="true"> <shape> <solid android:color="@color/bg_gray"/> </shape> </item> </selector>

（2）在drawable文件夹下新建tab_menu_text.xml文件，具体代码如下：

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:color="@color/text_green" android:state_selected="true"/> <item android:color="@color/text_black" /> </selector>

（3）在drawable文件夹下新建tab_menu_personal.xml文件，具体代码如下：

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@mipmap/menu_personal_on" android:state_selected="true"/> <item android:drawable="@mipmap/menu_personal_off"/> </selector>

（4）在drawable文件夹下新建tab_menu_send.xml文件，具体代码如下：

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@mipmap/menu_send_on" android:state_selected="true"/> <item android:drawable="@mipmap/menu_send_off"/> </selector>

（5）在drawable文件夹下新建tab_menu_list.xml文件，具体代码如下：

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@mipmap/menu_send_on" android:state_selected="true"/> <item android:drawable="@mipmap/menu_send_off"/> </selector>

（6）在layout文件夹下的activity_main.xml中具体代码如下：

<?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:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.bzu.fshiner.parttimejob.MainActivity"> <RelativeLayout android:id="@+id/tab_title" android:layout_width="match_parent" android:layout_height="48dp"> <TextView android:id="@+id/tv_top" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:textSize="18sp" android:textColor="@color/text_black" android:text="@string/tv_top"/> <View android:layout_width="match_parent" android:layout_height="2px" android:background="@color/text_black" android:layout_alignParentBottom="true"/> </RelativeLayout> <LinearLayout android:id="@+id/tab_menu" android:layout_width="match_parent" android:layout_height="56dp" android:orientation="horizontal" android:layout_alignParentBottom="true"> <TextView android:id="@+id/tv_list" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:drawablePadding="3dp" android:gravity="center" android:background="@drawable/tab_menu_bg" android:textColor="@drawable/tab_menu_text" android:drawableTop="@drawable/tab_menu_list" android:text="@string/tv_list"/> <TextView android:id="@+id/tv_send" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:drawablePadding="3dp" android:gravity="center" android:background="@drawable/tab_menu_bg" android:textColor="@drawable/tab_menu_text" android:drawableTop="@drawable/tab_menu_send" android:text="@string/tv_send"/> <TextView android:id="@+id/tv_personal" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:drawablePadding="3dp" android:gravity="center" android:background="@drawable/tab_menu_bg" android:textColor="@drawable/tab_menu_text" android:drawableTop="@drawable/tab_menu_personal" android:text="@string/tv_personal"/> </LinearLayout> <View android:id="@+id/div_tab_bar" android:layout_width="match_parent" android:layout_height="2px" android:layout_above="@id/tab_menu"/> <FrameLayout android:id="@+id/fragment_container" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_below="@id/tab_title" android:layout_above="@id/tab_menu"> </FrameLayout> </RelativeLayout>

（7）在layout文件夹中新建first_fragment.xml文件，具体代码如下：

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:id="@+id/tv_content" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:text="哈哈" android:textSize="20sp"/> </LinearLayout>

（8）在MainActivity中具体代码如下：

package com.bzu.fshiner.parttimejob; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.FrameLayout; import android.widget.TextView; public class MainActivity extends AppCompatActivity implements View.OnClickListener { private TextView tv_top; private TextView tv_list; private TextView tv_send; private TextView tv_personal; private FrameLayout fragment_container; private FirstFragment f1,f2,f3; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //ui组件初始化与事件绑定 tv_top=(TextView)this.findViewById(R.id.tv_top); tv_list=(TextView)this.findViewById(R.id.tv_list); tv_send=(TextView)this.findViewById(R.id.tv_send); tv_personal=(TextView)this.findViewById(R.id.tv_personal); fragment_container=(FrameLayout)findViewById(R.id.fragment_container); tv_list.setOnClickListener(this); tv_send.setOnClickListener(this); tv_personal.setOnClickListener(this); } //重置所有文本的选中状态 public void selected(){ tv_list.setSelected(false); tv_send.setSelected(false); tv_personal.setSelected(false); } //隐藏所有的Fragment private void hideAllFragment(android.app.FragmentTransaction transaction) { if(f1!=null){ transaction.hide(f1); } if(f2!=null){ transaction.hide(f2); } if(f3!=null){ transaction.hide(f3); } } @Override public void onClick(View view){ android.app.FragmentTransaction transaction=getFragmentManager().beginTransaction(); hideAllFragment(transaction); switch(view.getId()){ case R.id.tv_list: selected(); tv_list.setSelected(true); if(f1==null){ f1 = new FirstFragment("第一个Fragment"); transaction.add(R.id.fragment_container,f1); }else{ transaction.show(f1); } break; case R.id.tv_send: selected(); tv_send.setSelected(true); if(f2==null){ f2 = new FirstFragment("第2个Fragment"); transaction.add(R.id.fragment_container,f2); }else{ transaction.show(f2); } break; case R.id.tv_personal: selected(); tv_personal.setSelected(true); if(f3==null){ f3 = new FirstFragment("第三个Fragment"); transaction.add(R.id.fragment_container,f3); }else{ transaction.show(f3); } break; } transaction.commit(); } }

（9）创建类，类名为FistFragment，其中具体代码如下：

package com.bzu.fshiner.parttimejob; import android.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; /** * Created by Administrator on 2017/5/9. */ public class FirstFragment extends Fragment { private String context; private TextView textView; public FirstFragment(String context) { this.context = context; } public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState){ View view=inflater.inflate(R.layout.first_fragment,container,false); textView=(TextView)view.findViewById(R.id.tv_content); textView.setText(context); return view; } }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。