How to Show a selected label above the range Bar

[akbarattar3]

• Make sure you compiled the latest version.(确保你编译了最新版本)
• Describe the scenarios or operates when crash happened as much as possible(pictures would be better).(尽可能详细的描述崩溃时的场景或操作，最好有截图)
• Tell me your device type and Android OS version is very helpful.(设备信息和系统版本也比较有用)
• Paste your xml or java code.(粘贴你的代码)
• Paste the crash log.(粘贴你的崩溃日志)
• Please be polite.(请保持礼貌)
• How to set the selected label above thumb only for selected value