Merge pull request #107 from zhixc/dev

补充修复json聚合并发轮询引起的闪退bug   merge by zhixc

app/src/main/java/com/github/tvbox/osc/ui/fragment/PlayFragment.java

@@ -513,6 +513,7 @@ public class PlayFragment extends BaseLazyFragment {
             url="http://home.jundie.top:666/unBom.php?m3u8="+url;//尝试去bom头再次播放
         }
         if (mActivity == null) return;
+        if (!isAdded()) return;
         requireActivity().runOnUiThread(new Runnable() {
             @Override
             public void run() {