Android RadioButton 图片位置与大小实例详解

rgGroup = (RadioGroup) findViewById(R.id.re_group); 
    rbWeiHui = (RadioButton) findViewById(R.id.rb_wei_hui); 
    rbAdd = (RadioButton) findViewById(R.id.rb_add); 
    rbMine = (RadioButton) findViewById(R.id.rb_mine); 
 
    //定义底部标签图片大小 
    Drawable drawableWeiHui = getResources().getDrawable(R.drawable.btn_tab_wei_hui_selector); 
    drawableWeiHui.setBounds(0, 0, 69, 69);//第一0是距左右边距离，第二0是距上下边距离，第三69长度,第四宽度 
    rbWeiHui.setCompoundDrawables(null, drawableWeiHui, null, null);//只放上面 
 
    Drawable drawableAdd = getResources().getDrawable(R.drawable.btn_tab_add_selector); 
    drawableAdd.setBounds(0, 0, 168, 120); 
    rbAdd.setCompoundDrawables(drawableAdd, null, null, null); 
 
    Drawable drawableRight = getResources().getDrawable(R.drawable.btn_tab_mine_selector); 
    drawableRight.setBounds(0, 0, 69, 69); 
    rbMine.setCompoundDrawables(null, drawableRight, null, null); 
 
    //初始化底部标签 
    rgGroup.check(R.id.rb_wei_hui);// 默认勾选首页，初始化时候让首页默认勾选 

<RadioGroup 
    android:id="@+id/re_group" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:background="@color/app_bg_color" 
    android:orientation="horizontal" > 
 
    <RadioButton 
      android:id="@+id/rb_wei_hui" 
      style="@style/BottomTabStyle" 
      android:layout_marginTop="5dp" 
      android:drawableTop="@drawable/btn_tab_wei_hui_selector" 
      android:textSize="12sp" 
      android:text="xx" /> 
 
    <RadioButton 
      android:id="@+id/rb_add" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:background="@color/app_bg_color" 
      android:button="@null" 
      android:drawableTop="@mipmap/ic_add_selected" 
      android:gravity="center" 
      android:paddingTop="10dip" /> 
 
    <RadioButton 
      android:id="@+id/rb_mine" 
      style="@style/BottomTabStyle" 
      android:layout_marginTop="5dp" 
      android:drawableTop="@drawable/btn_tab_mine_selector" 
      android:textSize="12sp" 
      android:text="xx" /> 
  </RadioGroup> 

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

<!-- 低栏RadioButton首页下面的标签的样式 --> 
  <style name="BottomTabStyle"> 
    <item name="android:layout_width">wrap_content</item> 
    <item name="android:layout_height">wrap_content</item> 
    <item name="android:layout_gravity">center_vertical</item> 
    <item name="android:button">@null</item> 
    <item name="android:padding">5dp</item> 
    <item name="android:drawablePadding">3dp</item> 
    <item name="android:textColor">@drawable/btn_tab_text_selector</item> 
    <item name="android:layout_weight">1</item> 
    <item name="android:gravity">center</item> 
    <item name="android:layout_marginTop">5dp</item> 
  </style>