targetSdkVersion 更新到 28，出现的问题

The problem seems to be happening when your target sdk is 28.
So after trying out many options finally this worked.

 <activity
        android:name=".activities.FilterActivity"
        android:theme="@style/Transparent"
        android:windowSoftInputMode="stateHidden|adjustResize" />
style:-

<style name="Transparent" parent="Theme.AppCompat.Light.NoActionBar">
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowIsFloating">true</item>
        <item name="android:backgroundDimEnabled">false</item>
    </style>
Note:parent="Theme.AppCompat.Light.NoActionBar" is needed for api 28. 
Previously had something else at api 26. Was working great but started to give problem at 28. 
Hope it helps someone out here.