底部的实现

两个selector
一个style

如下selector：
btn_gv_seletor

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item  android:drawable="@mipmap/home_press" android:state_checked="true"/>
    <item android:drawable="@mipmap/home"/>
</selector>

第二个
btn_news_seletor

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item  android:drawable="@mipmap/newscenter_press" android:state_checked="true"/>
    <item android:drawable="@mipmap/newscenter"/>
</selector>

第三个
btn_text_seletor

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
 <item android:color="#f00" android:state_checked="true" />
<item android:color="#fff"/>
</selector>

主页面

 <RadioGroup
        android:id="@+id/rg_rb"
        android:background="@mipmap/bottom_tab_bg"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"

        android:orientation="horizontal">
    <RadioButton
        android:id="@+id/rb_home"
        style="@style/BottpmTabStyle"
        android:drawableTop="@drawable/btn_home_selector"
        android:text="首页"
        />

        <RadioButton
            android:id="@+id/rb_news"
            style="@style/BottpmTabStyle"
            android:drawableTop="@drawable/btn_news_selector"
            android:text="新闻"
            />
        <RadioButton
            android:id="@+id/rb_smart"
            style="@style/BottpmTabStyle"
            android:drawableTop="@drawable/btn_smart_selector"
            android:text="智慧"
            />
            </RadioGroup>

样式：
在style文件下

 <!-- Base application theme. -->
    <style name="BottpmTabStyle" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="android:layout_width">wrap_content</item>
        <item name="android:layout_height">wrap_content</item>
        <item name="android:padding">5dp</item>
        <item name="android:button">@null</item>
        <item name="android:layout_gravity">center_vertical</item>
        <item name="android:drawablePadding">3dp</item>
        <item name="android:textColor">@drawable/btn_text_selector</item>
        <item name="android:layout_weight">1</item>
        <item name="android:gravity">center</item>

    </style>

contentFragment

public class ContentFragment extends BaseFragment {
    @ViewInject(R.id.rg_rb)
    private RadioGroup radioGroup;

    @Override
    public View initViews() {
        View view  = View.inflate(mActivity,R.layout.fragment_content,null);
     // radioGroup = (RadioGroup) view.findViewById(R.id.rg_rb);
        return view;
    }

    @Override
    public void initData() {
       radioGroup.check(R.id.rb_home);//默认勾选首页
    }
}

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