Android实现底部导航栏功能

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我们。