Android底部菜单栏实现的实例代码

 Android 使用RadioGroup 实现底部导航菜单栏。

一、主界面布局的实现:

先来张效果图:

介绍一下总体界面包括的内容:底部五个导航按钮,主界面包括一个FrameLayout用来放五个Fragment。点击底部按钮会对应跳转到指定的界面。

实现布局:activity_main.xml

<?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:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="com.garvey.activitys.MainActivity">

<FrameLayout

android:id="@+id/id_fragment_content"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_above="@+id/id_diverline"></FrameLayout>

<View

android:id="@+id/id_diverline"

android:layout_above="@+id/id_bottom_tags"

android:layout_width="match_parent"

android:layout_height="0.1dp"

android:background="#C2C5CE"/>

<LinearLayout

android:id="@+id/id_bottom_tags"

android:layout_width="match_parent"

android:layout_height="55dp"

android:layout_alignParentBottom="true"

android:background="@drawable/bt_tag_bg"

android:orientation="horizontal">

<RadioGroup

android:id="@+id/id_navcontent"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_gravity="center"

android:background="@color/transparent"

android:gravity="center"

android:orientation="horizontal">

<RadioButton

android:id="@+id/id_nav_btshouye"

android:layout_width="0dp"

android:checked="true"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:layout_weight="1"

android:background="@color/transparent"

android:button="@null"

android:clickable="true"

android:drawablePadding="2dp"

android:drawableTop="@drawable/x_nav_menu_sy"

android:gravity="center"

android:onClick="switchView"

android:text="首页"

android:textColor="@drawable/x_nav_menu_color"

android:textSize="10sp" />

<RadioButton

android:id="@+id/id_nav_btgouwu"

android:layout_width="0dp"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:layout_weight="1"

android:background="@color/transparent"

android:button="@null"

android:clickable="true"

android:drawablePadding="2dp"

android:drawableTop="@drawable/x_nav_menu_gw"

android:gravity="center"

android:onClick="switchView"

android:text="购物"

android:textColor="@drawable/x_nav_menu_color"

android:textSize="10sp" />

<RadioButton

android:id="@+id/id_nav_btfengshang"

android:layout_width="0dp"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:layout_weight="1"

android:background="@color/transparent"

android:button="@null"

android:clickable="true"

android:drawablePadding="2dp"

android:drawableTop="@drawable/x_nav_menu_fs"

android:gravity="center"

android:onClick="switchView"

android:text="风尚"

android:textColor="@drawable/x_nav_menu_color"

android:textSize="10sp" />

<RadioButton

android:id="@+id/id_nav_btshequ"

android:layout_width="0dp"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:layout_weight="1"

android:background="@color/transparent"

android:button="@null"

android:clickable="true"

android:drawablePadding="2dp"

android:drawableTop="@drawable/x_nav_menu_sq"

android:gravity="center"

android:onClick="switchView"

android:text="社区"

android:textColor="@drawable/x_nav_menu_color"

android:textSize="10sp" />

<RadioButton

android:id="@+id/id_nav_btwode"

android:layout_width="0dp"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:layout_weight="1"

android:background="@color/transparent"

android:button="@null"

android:clickable="true"

android:drawablePadding="2dp"

android:drawableTop="@drawable/x_nav_menu_wd"

android:gravity="center"

android:onClick="switchView"

android:text="我的"

android:textColor="@drawable/x_nav_menu_color"

android:textSize="10sp" />

</RadioGroup>

</LinearLayout>

</RelativeLayout>

编写selector 用来设置点击后的背景变化:

x_nav_menu_fs.xml,x_nav_menu_gw.xml,x_nav_menu_sq.xml,x_nav_menu_sy.xml,x_nav_menu_wd.xml

例如x_nav_menu_sy.xml文件的书写为:

<?xml version="1.0" encoding="utf-8"?>

<selector xmlns:android="http://schemas.android.com/apk/res/android">

<item android:drawable="@mipmap/tabitem_0" android:state_checked="true"></item>

<item android:drawable="@mipmap/tabitem0"></item>

</selector>

编写文字点击后颜色的变化drawable:x_nav_menu_color.xml

<?xml version="1.0" encoding="UTF-8"?>

<selector xmlns:android="http://schemas.android.com/apk/res/android">

<item android:color="#CF75E9" android:state_checked="true"></item>

<item android:color="#989898"></item>

</selector>

编写底部菜单栏背景的drawablebt_tag_bg.xml:

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android">

<solid android:color="#FFFFFF" />

</shape>

按照上述方式的就完成了底部菜单栏的布局方式,同时在布局的时候我们为每个RadioButton设置了点击监听器,监听方法是:switchView(View view)。

二、布局的代码实现

创建五个fragment,分别对应每个按钮的界面,Fragment的代码非常简单,例如下面一个Fragment:

package com.garvey.modules;

import android.os.Bundle;

import android.support.v4.app.Fragment;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import com.garvey.babyshop.R;

/**

* 作者: Garvey on 2016/6/13.

* 邮箱: lianjiawei18@163.com

*/

public class ShouYeFragment extends Fragment{

// 缓存Fragment view

private View rootView;

private static ShouYeFragment shouYeFragment;

public ShouYeFragment(){}

public static ShouYeFragment getNewInstance(){

if (shouYeFragment ==null){

shouYeFragment =new ShouYeFragment();

}

return shouYeFragment;

}

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

}

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

if (rootView == null) {

rootView = inflater.inflate(R.layout.fragment_shouye, container, false);

}

// 缓存的rootView需要判断是否已经被加过parent,

// 如果有parent需要从parent删除,要不然会发生这个rootview已经有parent的错误。

ViewGroup parent = (ViewGroup) rootView.getParent();

if (parent != null) {

parent.removeView(rootView);

}

return rootView;

}

@Override

public void onResume() {

super.onResume();

}

}

然后编写MainActivity的代码,首先确立界面对应的索引:

public static final int VIEW_SHOUYE_INDEX = 0;

public static final int VIEW_GOUWU_INDEX = 1;

public static final int VIEW_FENGSHANG_INDEX = 2;

public static final int VIEW_SHEQU_INDEX = 3;

public static final int VIEW_WODE_INDEX = 4;

private int temp_position_index = -1;

然后书写对应的switchView(View view )方法来实现对应的界面切换:

public void switchView(View view) {

switch (view.getId()) {

case R.id.id_nav_btshouye:

if (temp_position_index != VIEW_SHOUYE_INDEX) {

//显示

mTransaction = getSupportFragmentManager().beginTransaction();

mTransaction.replace(R.id.id_fragment_content, syFragemnt);

mTransaction.commit();

}

temp_position_index = VIEW_SHOUYE_INDEX;

break;

case R.id.id_nav_btgouwu:

if (temp_position_index != VIEW_GOUWU_INDEX) {

//显示

mTransaction = getSupportFragmentManager().beginTransaction();

mTransaction.replace(R.id.id_fragment_content, gwFragment);

mTransaction.commit();

}

temp_position_index = VIEW_GOUWU_INDEX;

break;

case R.id.id_nav_btfengshang:

if (temp_position_index != VIEW_FENGSHANG_INDEX) {

//显示

mTransaction = getSupportFragmentManager().beginTransaction();

mTransaction.replace(R.id.id_fragment_content, fsFragment);

mTransaction.commit();

}

temp_position_index = VIEW_FENGSHANG_INDEX;

break;

case R.id.id_nav_btshequ:

if (temp_position_index != VIEW_SHEQU_INDEX) {

//显示

mTransaction = getSupportFragmentManager().beginTransaction();

mTransaction.replace(R.id.id_fragment_content, sqFragment);

mTransaction.commit();

}

temp_position_index = VIEW_SHEQU_INDEX;

break;

case R.id.id_nav_btwode:

if (temp_position_index != VIEW_WODE_INDEX) {

//显示

mTransaction = getSupportFragmentManager().beginTransaction();

mTransaction.replace(R.id.id_fragment_content, wdFragment);

mTransaction.commit();

}

temp_position_index = VIEW_WODE_INDEX;

break;

}

}

MainActivity的总代码如下:

package com.garvey.activitys;

import android.os.Bundle;

import android.support.v4.app.Fragment;

import android.support.v4.app.FragmentTransaction;

import android.support.v7.app.AppCompatActivity;

import android.view.View;

import android.widget.RadioGroup;

import com.garvey.babyshop.R;

import com.garvey.modules.FengShangFragment;

import com.garvey.modules.GouWuFragment;

import com.garvey.modules.SheQuFragment;

import com.garvey.modules.ShouYeFragment;

import com.garvey.modules.WoDeFragment;

public class MainActivity extends AppCompatActivity {

/**

* 底部导航栏的widdget

*/

private RadioGroup mNavGroup;

private FragmentTransaction mTransaction;

/**

* 五个Fragments

*/

Fragment syFragemnt, gwFragment, fsFragment, sqFragment, wdFragment;

public static final int VIEW_SHOUYE_INDEX = 0;

public static final int VIEW_GOUWU_INDEX = 1;

public static final int VIEW_FENGSHANG_INDEX = 2;

public static final int VIEW_SHEQU_INDEX = 3;

public static final int VIEW_WODE_INDEX = 4;

private int temp_position_index = -1;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initView();

}

private void initView() {

mNavGroup = (RadioGroup) findViewById(R.id.id_navcontent);

syFragemnt = ShouYeFragment.getNewInstance();

gwFragment = GouWuFragment.getNewInstance();

fsFragment = FengShangFragment.getNewInstance();

sqFragment = SheQuFragment.getNewInstance();

wdFragment = WoDeFragment.getNewInstance();

//显示

mTransaction = getSupportFragmentManager().beginTransaction();

mTransaction.replace(R.id.id_fragment_content, syFragemnt);

mTransaction.commit();

}

public void switchView(View view) {

switch (view.getId()) {

case R.id.id_nav_btshouye:

if (temp_position_index != VIEW_SHOUYE_INDEX) {

//显示

mTransaction = getSupportFragmentManager().beginTransaction();

mTransaction.replace(R.id.id_fragment_content, syFragemnt);

mTransaction.commit();

}

temp_position_index = VIEW_SHOUYE_INDEX;

break;

case R.id.id_nav_btgouwu:

if (temp_position_index != VIEW_GOUWU_INDEX) {

//显示

mTransaction = getSupportFragmentManager().beginTransaction();

mTransaction.replace(R.id.id_fragment_content, gwFragment);

mTransaction.commit();

}

temp_position_index = VIEW_GOUWU_INDEX;

break;

case R.id.id_nav_btfengshang:

if (temp_position_index != VIEW_FENGSHANG_INDEX) {

//显示

mTransaction = getSupportFragmentManager().beginTransaction();

mTransaction.replace(R.id.id_fragment_content, fsFragment);

mTransaction.commit();

}

temp_position_index = VIEW_FENGSHANG_INDEX;

break;

case R.id.id_nav_btshequ:

if (temp_position_index != VIEW_SHEQU_INDEX) {

//显示

mTransaction = getSupportFragmentManager().beginTransaction();

mTransaction.replace(R.id.id_fragment_content, sqFragment);

mTransaction.commit();

}

temp_position_index = VIEW_SHEQU_INDEX;

break;

case R.id.id_nav_btwode:

if (temp_position_index != VIEW_WODE_INDEX) {

//显示

mTransaction = getSupportFragmentManager().beginTransaction();

mTransaction.replace(R.id.id_fragment_content, wdFragment);

mTransaction.commit();

}

temp_position_index = VIEW_WODE_INDEX;

break;

}

}

}

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以上是 Android底部菜单栏实现的实例代码 的全部内容, 来源链接: utcz.com/p/240475.html

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