Android实现底部导航栏功能

发布时间：2020-10-06 00:20:56 作者：shasha1021
来源：脚本之家阅读：179

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：

Android实现底部导航栏功能

（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亿速云。

Android实现底部导航栏功能

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