Android(安卓)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：http://download.csdn.net/download/baiyulinlin1/9895564

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！

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