Android底部菜单栏（RadioGroup+Fragment）美化

众所周知，android的底部菜单栏太重要，平时项目一般都是需要用到的，但是网上关于这方面的demo做得太丑了，实在惨不忍睹，所以这里便用RadioGroup+Fragment的方式写了一个，顺便美化了一下，需要的可以看下。

效果图：

项目结构

MainActivity.java

public class MainActivity extends AppCompatActivity {   private FrameLayout frameLayout;  private RadioGroup radioGroup;  private Fragment[] mFragments;  private int mIndex;    @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    initFragment();    setRadioGroupListener();    }   private void initFragment() {    radioGroup = (RadioGroup) findViewById(R.id.radioGroup);    frameLayout = (FrameLayout) findViewById(R.id.fl_content);    HomeFragment homeFragment = new HomeFragment();    ShopFragment shopFragment = new ShopFragment();    LiveFragment liveFragment = new LiveFragment();    ShoppingCarFragment shoppingCarFragment = new ShoppingCarFragment();    MineFragment mineFragment = new MineFragment();    //添加到数组    mFragments = new Fragment[]{homeFragment, shopFragment, liveFragment, shoppingCarFragment, mineFragment};    //开启事务    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();    //添加首页    ft.add(R.id.fl_content, homeFragment).commit();    //默认设置为第0个    setIndexSelected(0);  }   private void setIndexSelected(int index) {    if (mIndex == index) {      return;    }    FragmentManager fragmentManager = getSupportFragmentManager();    FragmentTransaction ft = fragmentManager.beginTransaction();    //隐藏    ft.hide(mFragments[mIndex]);    //判断是否添加    if (!mFragments[index].isAdded()) {      ft.add(R.id.fl_content, mFragments[index]).show(mFragments[index]);    } else {      ft.show(mFragments[index]);    }    ft.commit();    //再次赋值    mIndex = index;   }   private void setRadioGroupListener() {    radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {      @Override      public void onCheckedChanged(RadioGroup radioGroup, int i) {        switch (i) {          case R.id.rb_home:            setIndexSelected(0);            break;          case R.id.rb_shop:            setIndexSelected(1);            break;          case R.id.rb_live:            setIndexSelected(2);            break;          case R.id.rb_shopping_car:            setIndexSelected(3);            break;          case R.id.rb_mine:            setIndexSelected(4);            break;          default:            setIndexSelected(0);            break;        }      }    });  }   @Override  public boolean onKeyDown(int keyCode, KeyEvent event) {    if (keyCode == KeyEvent.KEYCODE_BACK) {      //仅当activity为task根（即首个启动activity）时才生效,这个方法不会改变task中的activity状态，      // 按下返回键的作用跟按下HOME效果一样；重新点击应用还是回到应用退出前的状态；      moveTaskToBack(false);      return true;    }    return super.onKeyDown(keyCode, event);  }}

Fragment,这里只列出HomeFragment的，其他都是一样

public class HomeFragment extends BaseFragment {   public HomeFragment() {  }    @Override  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {    View view=inflater.inflate(R.layout.fragment_home,container,false);    return view;  }  }

activity_main.xml布局文件

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

RadioButton的样式

Demo下载地址：底部菜单栏

温馨提示：以后我自己写的demo都是用Android Studio写的了，用Eclipse的同学要的话需要自己改一下，时代在进步，工具也在升级！

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脚本之家。

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