bug fix for rtsp client

houxiao

2017-08-18 7f0053c8f0cd76ecff7f8aee060cd4fd5093b1a3

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