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Android底部菜單欄實現的實例代碼

發布時間：2020-10-06 22:48:56 來源：腳本之家 閱讀：382 作者：Garvey Lian 欄目：移動開發

 Android 使用RadioGroup 實現底部導航菜單欄。

一、主界面布局的實現：

先來張效果圖：

Android底部菜單欄實現的實例代碼

介紹一下總體界面包括的內容：底部五個導航按鈕，主界面包括一個FrameLayout用來放五個Fragment。點擊底部按鈕會對應跳轉到指定的界面。

實現布局：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="首頁"
 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="購物"
 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="風尚"
 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="社區"
 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>

編寫selector 用來設置點擊后的背景變化：

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文件的書寫為：

<?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>

編寫文字點擊后顏色的變化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>

編寫底部菜單欄背景的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單欄的布局方式，同時在布局的時候我們為每個RadioButton設置了點擊監聽器，監聽方法是：switchView(View view)。

二、布局的代碼實現

創建五個fragment,分別對應每個按鈕的界面，Fragment的代碼非常簡單，例如下面一個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.
 * 郵箱： lianjiawei18@163.com
 */
public class ShouYeFragment extends Fragment{
 // 緩存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);
 }
 // 緩存的rootView需要判斷是否已經被加過parent，
 // 如果有parent需要從parent刪除，要不然會發生這個rootview已經有parent的錯誤。
 ViewGroup parent = (ViewGroup) rootView.getParent();
 if (parent != null) {
 parent.removeView(rootView);
 }
 return rootView;
 }
 @Override
 public void onResume() {
 super.onResume();
 }
}

然后編寫MainActivity的代碼，首先確立界面對應的索引：

 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;

然后書寫對應的switchView(View view )方法來實現對應的界面切換：

public void switchView(View view) {
 switch (view.getId()) {
 case R.id.id_nav_btshouye:
 if (temp_position_index != VIEW_SHOUYE_INDEX) {
  //顯示
  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) {
  //顯示
  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) {
  //顯示
  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) {
  //顯示
  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) {
  //顯示
  mTransaction = getSupportFragmentManager().beginTransaction();
  mTransaction.replace(R.id.id_fragment_content, wdFragment);
  mTransaction.commit();
 }
 temp_position_index = VIEW_WODE_INDEX;
 break;
 }
 }

MainActivity的總代碼如下：

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 {
 /**
 * 底部導航欄的widdget
 */
 private RadioGroup mNavGroup;
 private FragmentTransaction mTransaction;
 /**
 * 五個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();
 //顯示
 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) {
  //顯示
  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) {
  //顯示
  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) {
  //顯示
  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) {
  //顯示
  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) {
  //顯示
  mTransaction = getSupportFragmentManager().beginTransaction();
  mTransaction.replace(R.id.id_fragment_content, wdFragment);
  mTransaction.commit();
 }
 temp_position_index = VIEW_WODE_INDEX;
 break;
 }
 }
}

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