Android实现淘宝底部图标导航栏

在上一篇中，简单的使用透明主题的Activity实现了仿微信右侧顶部的对话框，上午又花了两个小时研究了一下淘宝底部的导航栏实现，网上的做法也有很多，今天我就使用一种通过基本控件加上布局的方式，没有任何的自定义风格，控件等来实现，还是老样子，先看一下效果图：

下面就来具体看一看如何实现的，还是按照步骤来吧：

绘制主界面

activity_layout.xml代码如下：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:fitsSystemWindows="true"
  android:orientation="vertical"
  tools:context=".MainActivity">

  <FrameLayout
    android:id="@+id/fragment_container"
    android:layout_marginBottom="50dp"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

  </FrameLayout>

  <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:layout_alignParentBottom="true"
    android:background="@color/noCheckedColor">

    <RelativeLayout
      android:gravity="center"
      android:layout_width="wrap_content"
      android:layout_height="match_parent">
    <ImageView
      android:layout_marginTop="5dp"
      android:id="@+id/title_image"
      android:layout_marginLeft="18dp"
      android:layout_width="40dp"
      android:layout_height="40dp"
      android:background="@drawable/taobao" />

      <LinearLayout
        android:gravity="center"
        android:orientation="vertical"
        android:id="@+id/first_page_layout"
        android:layout_width="60dp"
        android:layout_height="wrap_content">
      <ImageView
        android:id="@+id/first_page_icon"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@drawable/firstpage" />

      <TextView
        android:textColor="#000000"
        android:id="@+id/first_page_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="首页" />
      </LinearLayout>

    </RelativeLayout>

      <LinearLayout
        android:layout_marginLeft="26dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:weightSum="4">

        <LinearLayout
          android:id="@+id/micro_tao_layout"
          android:layout_width="0dp"
          android:layout_height="match_parent"
          android:layout_weight="1"
          android:gravity="center"
          android:orientation="vertical">

          <ImageView
            android:id="@+id/microtao_icon"
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:background="@drawable/microtao" />

          <TextView
            android:textColor="#000000"
            android:id="@+id/microtao_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="微淘" />
        </LinearLayout>

        <LinearLayout
          android:id="@+id/message_layout"
          android:layout_width="0dp"
          android:layout_height="match_parent"
          android:layout_weight="1"
          android:gravity="center"
          android:orientation="vertical">

          <ImageView
            android:id="@+id/message_icon"
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:background="@drawable/message" />

          <TextView
            android:textColor="#000000"
            android:id="@+id/message_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="消息" />
        </LinearLayout>

        <LinearLayout
          android:id="@+id/buycar_layout"
          android:layout_width="0dp"
          android:layout_height="match_parent"
          android:layout_weight="1"
          android:gravity="center"
          android:orientation="vertical">

          <ImageView
            android:id="@+id/buycar_icon"
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:background="@drawable/buycar" />

          <TextView
            android:textColor="#000000"
            android:id="@+id/buycar_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="购物车" />
        </LinearLayout>

        <LinearLayout
          android:id="@+id/myfile_layout"
          android:layout_width="0dp"
          android:layout_height="match_parent"
          android:layout_weight="1"
          android:gravity="center"
          android:orientation="vertical">

          <ImageView
            android:id="@+id/myfile_icon"
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:background="@drawable/myfile" />

          <TextView
            android:textColor="#000000"
            android:id="@+id/myfile_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="我的淘宝" />
        </LinearLayout>
      </LinearLayout>
    </LinearLayout>
</RelativeLayout>

界面的逻辑控制Activity:

MainActivity.java代码：

package com.hfut.enmulatetaobaonavbar;

import android.graphics.Color;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.hfut.enmulatetaobaonavbar.fragment.BuycarFragment;
import com.hfut.enmulatetaobaonavbar.fragment.FirstPageFragment;
import com.hfut.enmulatetaobaonavbar.fragment.MessageFragment;
import com.hfut.enmulatetaobaonavbar.fragment.MicroTaoFragment;
import com.hfut.enmulatetaobaonavbar.fragment.MyfileFragment;

/**
 * @author why
 * @date 2018-10-3 11:12:39
 */
public class MainActivity extends AppCompatActivity implements View.OnClickListener {

  LinearLayout microTaoLay;
  LinearLayout messageLay;
  LinearLayout buycarLay;
  LinearLayout myfileLay;
  LinearLayout firstPageLay;

  ImageView microTaoIcon;
  ImageView messageIcon;
  ImageView buycarIcon;
  ImageView myfileIcon;
  ImageView firstPageIcon;
  ImageView titleImage;

  TextView microTaoText;
  TextView messageText;
  TextView buycarText;
  TextView myfileText;

  FragmentManager manager;
  FragmentTransaction transaction;
  Fragment firFragment, microFragment, messageFragment, buycarFragment, myfileFragment;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    manager = getSupportFragmentManager();
    transaction = manager.beginTransaction();
    firFragment = new FirstPageFragment();
    transaction.add(R.id.fragment_container, firFragment);
    transaction.commit();
    initUI();
  }

  private void initUI() {
    microTaoLay = findViewById(R.id.micro_tao_layout);
    messageLay = findViewById(R.id.message_layout);
    buycarLay = findViewById(R.id.buycar_layout);
    myfileLay = findViewById(R.id.myfile_layout);
    firstPageLay = findViewById(R.id.first_page_layout);
    firstPageLay.setVisibility(View.INVISIBLE);

    microTaoIcon = findViewById(R.id.microtao_icon);
    messageIcon = findViewById(R.id.message_icon);
    buycarIcon = findViewById(R.id.buycar_icon);
    myfileIcon = findViewById(R.id.myfile_icon);
    firstPageIcon = findViewById(R.id.first_page_icon);
    titleImage = findViewById(R.id.title_image);

    microTaoText = findViewById(R.id.microtao_text);
    messageText = findViewById(R.id.message_text);
    buycarText = findViewById(R.id.buycar_text);
    myfileText = findViewById(R.id.myfile_text);

    microTaoLay.setOnClickListener(this);
    messageLay.setOnClickListener(this);
    buycarLay.setOnClickListener(this);
    myfileLay.setOnClickListener(this);
    firstPageLay.setOnClickListener(this);

  }

  @Override
  public void onClick(View v) {
    transaction = manager.beginTransaction();
    hideFragment(transaction);//隐藏之前的Fragment
    switch (v.getId()) {
      case R.id.micro_tao_layout:
        microFragment = new MicroTaoFragment();
        transaction.add(R.id.fragment_container, microFragment);
        transaction.commit();
        microTaoIcon.setImageDrawable(getResources().getDrawable(R.drawable.microtao_choosen));
        microTaoText.setTextColor(Color.RED);

        //显示首页布局，隐藏标题淘宝图片
        if (firstPageLay.getVisibility() != View.VISIBLE) {
          firstPageLay.setVisibility(View.VISIBLE);
          titleImage.setVisibility(View.INVISIBLE);
        }

        break;
      case R.id.message_layout:
        messageFragment = new MessageFragment();
        transaction.add(R.id.fragment_container, messageFragment);
        transaction.commit();
        messageIcon.setImageDrawable(getResources().getDrawable(R.drawable.message_choosen));
        messageText.setTextColor(Color.RED);

        //显示首页布局，隐藏标题淘宝图片
        if (firstPageLay.getVisibility() != View.VISIBLE) {
          firstPageLay.setVisibility(View.VISIBLE);
          titleImage.setVisibility(View.INVISIBLE);
        }
        break;
      case R.id.buycar_layout:
        buycarFragment = new BuycarFragment();
        transaction.add(R.id.fragment_container, buycarFragment);
        transaction.commit();
        buycarIcon.setImageDrawable(getResources().getDrawable(R.drawable.buycar_choosen));
        buycarText.setTextColor(Color.RED);

        //显示首页布局，隐藏标题淘宝图片
        if (firstPageLay.getVisibility() != View.VISIBLE) {
          firstPageLay.setVisibility(View.VISIBLE);
          titleImage.setVisibility(View.INVISIBLE);
        }
        break;
      case R.id.myfile_layout:
        myfileFragment = new MyfileFragment();
        transaction.add(R.id.fragment_container, myfileFragment);
        transaction.commit();
        myfileIcon.setImageDrawable(getResources().getDrawable(R.drawable.myfile_choosen));
        myfileText.setTextColor(Color.RED);

        //显示首页布局，隐藏标题淘宝图片
        if (firstPageLay.getVisibility() != View.VISIBLE) {
          firstPageLay.setVisibility(View.VISIBLE);
          titleImage.setVisibility(View.INVISIBLE);
        }
        break;

      case R.id.first_page_layout:
        firFragment = new FirstPageFragment();
        transaction.add(R.id.fragment_container, firFragment);
        transaction.commit();
        firstPageLay.setVisibility(View.INVISIBLE);
        titleImage.setVisibility(View.VISIBLE);

      default:
        break;
    }
  }

  private void hideFragment(FragmentTransaction transaction) {
    if (firFragment != null) {
      transaction.remove(firFragment);

    }
    if (microFragment != null) {
      transaction.remove(microFragment);
      microTaoIcon.setImageDrawable(getResources().getDrawable(R.drawable.microtao));
      microTaoText.setTextColor(Color.BLACK);

    }
    if (messageFragment != null) {
      transaction.remove(messageFragment);
      messageIcon.setImageDrawable(getResources().getDrawable(R.drawable.message));
      messageText.setTextColor(Color.BLACK);
    }
    if (buycarFragment != null) {
      transaction.remove(buycarFragment);
      buycarIcon.setImageDrawable(getResources().getDrawable(R.drawable.buycar));
      buycarText.setTextColor(Color.BLACK);
    }
    if (myfileFragment != null) {
      transaction.remove(myfileFragment);
      myfileIcon.setImageDrawable(getResources().getDrawable(R.drawable.myfile));
      myfileText.setTextColor(Color.BLACK);
    }
  }
}

Fragment对应的布局代码（这里为了简化，所有Fragment使用的是同一个很简单的布局）：
fragment_layout.xml代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:gravity="center"
  android:layout_width="match_parent"
  android:layout_height="match_parent">

  <TextView
    android:gravity="center"
    android:id="@+id/tip_message"
    android:textSize="30sp"
    android:text="首页"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

</LinearLayout>

自定义Fragment代码（这里我就给出一个，其他的完全一样，只是修改了Fragment布局中的文本内容）：
FirstPageFragment.java代码：

package com.hfut.enmulatetaobaonavbar.fragment;

import android.os.Bundle;
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;

import com.hfut.enmulatetaobaonavbar.R;

/**
 * author:why
 * created on: 2018/10/3 12:11
 * description:
 */
public class FirstPageFragment extends Fragment {

  TextView message;
  @Nullable
  @Override
  public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_layout, container, false);
    message=view.findViewById(R.id.tip_message);
    message.setText("这是首页");
    return view;
  }
}

上面就是几个主要的组成部分了，其他的素材就不介绍了，还有就是很多代码可以优化的地方也没有做在太多考虑，下面就来说一说几个需要注意的点：

• Fragment，FragmentManager，FragmentTransaction的配合使用
• 淘宝图标与首页菜单项的切换
• Fragment的包不要使用错了，不是android.app.Fragment
• 填充FramLayout的时候，注意FragmentTransaction里面的内容的添加与删除
• 实现的本质其实就是点击事件与FramLayout配合Fragment实现的

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。