通过RadioButton实现底部菜单

先看效果

这个是通过 RadioButton 实现的底部菜单栏

先看页面的 MainActivity.xml 里面是 RadioButton 源码

<RadioGroup
            android:id="@+id/radiogroup"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            >
            <RadioButton android:id="@+id/radio_home"
                style="@style/main_tab_bottom"
                android:drawableTop="@drawable/footer_home_selector"
                android:text="账单"
                android:button="@null"
                android:checked="true"

                />

            <RadioButton android:id="@+id/radio_chart"
                style="@style/main_tab_bottom"
                android:drawableTop="@drawable/footer_chart_selector"
                android:text="图表"
                android:button="@null"
                />

            <RadioButton android:id="@+id/radio_more"
                style="@style/main_tab_bottom"
                android:drawableTop="@drawable/footer_more_selector"
                android:text="更多"
                android:button="@null"
                />

            <RadioButton android:id="@+id/radio_mine"
                style="@style/main_tab_bottom"
                android:drawableTop="@drawable/footer_wode_selector"
                android:text="我的"
                android:button="@null"
                />

        RadioGroup>

drawableTop 是设置图标放置在文字的上方。

在drawables 文件夹下分别创建  footer_home_selector、footer_chart_selector、footer_more_selector、footer_wode_selector 这个4个文件

在这个4个文件里面分别设置图标跟对应的效果图标

footer_home_selector 设置了选中状态

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_checked="true" android:drawable="@drawable/zhangdan1">item>
    <item android:drawable="@drawable/zhangdan">item>
selector>

footer_chart_selector

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_checked="true" android:drawable="@drawable/tubiao1">item>
    <item android:drawable="@drawable/tubiao">item>
selector>

footer_more_selector

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_checked="true" android:drawable="@drawable/more1">item>
    <item android:drawable="@drawable/more">item>
selector>

footer_wode_selector

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_checked="true" android:drawable="@drawable/wode1">item>
    <item android:drawable="@drawable/wode">item>
selector>

好了，基本的文件设置完成了，现在要到 java文件里面去调整图标的大小

//把图标放进一个数组里面
RadioButton[] rb = new RadioButton[4];
rb[0] = (RadioButton) findViewById(R.id.radio_home);
rb[1] = (RadioButton) findViewById(R.id.radio_chart);
rb[2] = (RadioButton) findViewById(R.id.radio_more);
rb[3] = (RadioButton) findViewById(R.id.radio_mine);

for(int i=0;i){
       Drawable[] drawables = rb[i].getCompoundDrawables();
       Rect r = new Rect(0,0,drawables[1].getMinimumWidth()*2/5,drawables[1].getMinimumHeight()*2/5);
       drawables[1].setBounds(r);
       rb[i].setCompoundDrawables(null,drawables[1],null,null);
}