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：
