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Android实现美团APP的底部滑动菜单

2020-03-16 12:04 615 查看

仿美团APP的底部滑动菜单Android实现，供大家参考，具体内容如下

在现在的APP的应用中，类似仿美团APP的底部滑动菜单，应用是挺多的，例如QQ，微信，支付宝都应用到。开发流程如下

1. 底部按钮

底部按钮使用RadioButton。

// 按钮布局
<LinearLayout
android:id="@+id/llradiogroup"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true">

<RadioGroup
android:id="@+id/rg_menu"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">

<RadioButton
android:id="@+id/rbtn_home"
style="@style/RadioButton"
android:checked="true"
android:drawableTop="@drawable/home"
android:text="首页" />

<RadioButton
android:id="@+id/rbtn_vest"
style="@style/RadioButton"
android:drawableTop="@drawable/investment"
android:text="投资" />

<RadioButton
android:id="@+id/rbtn_photo"
style="@style/RadioButton"
android:drawableTop="@drawable/shooting"
android:text="拍拍" />

<RadioButton
android:id="@+id/rbtn_mine"
style="@style/RadioButton"
android:drawableTop="@drawable/recom_member"
android:text="我的" />

<RadioButton
android:id="@+id/rbtn_more"
style="@style/RadioButton"
android:drawableTop="@drawable/more"
android:text="更多" />

</RadioGroup>

// style样式
<style name="RadioButton">
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">60dp</item>
<item name="android:gravity">center</item>
<item name="android:layout_weight">1</item>
<item name="android:button">@null</item>
<item name="android:background">@drawable/menueselector</item>
</style>

style样式中的menueselector为背景选择器，使按钮选中变色

在Res目录下新建文件夹（drawable-nodpi）,在里面建立新的xml文件，选择资源类型为Drawable的selector，在每一个selector中建立item选项

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!--选中背景颜色-->
<item android:drawable="@color/checked" android:state_checked="true" />
<!--未选中背景颜色-->
<item android:drawable="@color/nochecked" android:state_checked="false" />
</selector>

2. 中间的滑动窗口

<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@+id/llradiogroup">
</android.support.v4.view.ViewPager>

3. 往滑动窗口添加按钮对应的Fragment, 并监听相应事件

下面的代码注意两点

MainActivity需继承于FragmentActivity，这样才能找到其中的getSupportFragmentManager()方法
在书写Fragment时切记引入的是android.support.v4.app.Fragment，而非android.app.Fragment(android.app.Fragment是在3.0引入的，为了兼容更低版本首选android.support.v4.app.Fragment)

package com.lsw.wealthapp.activity;

import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import com.lsw.wealthapp.R;
import com.lsw.wealthapp.fragment.CaptureFragment;
import com.lsw.wealthapp.fragment.HomeFragment;
import com.lsw.wealthapp.fragment.InvestmentFragment;
import com.lsw.wealthapp.fragment.MoreFragment;
import com.lsw.wealthapp.fragment.MyFragment;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends FragmentActivity {
// HomeFragmentIndex
private static final int HomeViewPagerIndex = 0;
// InvestmentFragmentIndex
private static final int InvsetViewPagerIndex = 1;
// CaptureFragmentIndex
private static final int CaptureViewPagerIndex = 2;
// MyFragmentIndex
private static final int MyViewPagerIndex = 3;
// MoreFragmentIndex
private static final int MoreViewPagerIndex = 4;
private ViewPager viewPager;
// 主页页面
private HomeFragment homeFragment;
// 投资页面
private InvestmentFragment investmentFragment;
//拍照页面
private CaptureFragment captureFragment;
// 我的页面
private MyFragment myFragment;
// 更多页面
private MoreFragment moreFragment;
// Fragment集合
private List<Fragment> fragmentList;
// FragmentAdapter
private MyPageFramgentAdapter myPageFramgentAdapter;
// 菜单RadioGroup
private RadioGroup radioGroup;
// 主页按钮
private RadioButton rbtnHome;
// 投资按钮
private RadioButton rbtnInvest;
// 拍照按钮
private RadioButton rbtnCapture;
// 我的按钮
private RadioButton rbtnMine;
// 更多按钮
private RadioButton rbtnMore;

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

private void initViews() {
viewPager = (ViewPager) findViewById(R.id.viewPager);
homeFragment = new HomeFragment();
investmentFragment = new InvestmentFragment();
captureFragment = new CaptureFragment();
myFragment = new MyFragment();
moreFragment = new MoreFragment();
fragmentList = new ArrayList<Fragment>();
radioGroup = (RadioGroup) findViewById(R.id.rg_menu);
rbtnHome = (RadioButton) findViewById(R.id.rbtn_home);
rbtnInvest = (RadioButton) findViewById(R.id.rbtn_vest);
rbtnCapture = (RadioButton) findViewById(R.id.rbtn_photo);
rbtnMine = (RadioButton) findViewById(R.id.rbtn_mine);
rbtnMore = (RadioButton) findViewById(R.id.rbtn_more);
// 按钮选中，viewPager展示对应的页面
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
switch (i) {
case R.id.rbtn_home:
viewPager.setCurrentItem(HomeViewPagerIndex);
break;
case R.id.rbtn_vest:
viewPager.setCurrentItem(InvsetViewPagerIndex);
break;
case R.id.rbtn_photo:
viewPager.setCurrentItem(CaptureViewPagerIndex);
break;
case R.id.rbtn_mine:
viewPager.setCurrentItem(MyViewPagerIndex);
break;
case R.id.rbtn_more:
viewPager.setCurrentItem(MoreViewPagerIndex);
break;
}
}
});
//将Fragment加入集合中
fragmentList.add(homeFragment);
fragmentList.add(investmentFragment);
fragmentList.add(captureFragment);
fragmentList.add(myFragment);
fragmentList.add(moreFragment);
FragmentManager fm = getSupportFragmentManager();
myPageFramgentAdapter = new MyPageFramgentAdapter(fm);
viewPager.setAdapter(myPageFramgentAdapter);
// viewPager发生改变，对应的按钮状态变为选中
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

}

@Override
public void onPageSelected(int position) {
switch (position) {
case HomeViewPagerIndex:
rbtnHome.setChecked(true);
break;
case InvsetViewPagerIndex:
rbtnInvest.setChecked(true);
break;
case CaptureViewPagerIndex:
rbtnCapture.setChecked(true);
break;
case MyViewPagerIndex:
rbtnMine.setChecked(true);
break;
case MoreViewPagerIndex:
rbtnMore.setChecked(true);
break;
default:
break;

}
}

@Override
public void onPageScrollStateChanged(int state) {

}
});
}
// viewPager所需的适配器
class MyPageFramgentAdapter extends FragmentPagerAdapter {

public MyPageFramgentAdapter(FragmentManager fm) {
super(fm);
}

@Override
public Fragment getItem(int position) {
return fragmentList.get(position);
}

@Override
public int getCount() {
return fragmentList.size();
}
}

}

以上就是本文的全部内容，希望对大家的学习有所帮助

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