android NativeCall self and remote view are black when i join and call in the same sessionid

as the titile described, can any one give some sugguestion.

my android device latest log is:

03-17 18:47:42.106: D/StreamHandler(18928): [RtcSession] got local candidate for Stream{V1,SEND_RECEIVE}
03-17 18:47:42.106: I/RTCNativeCall(18928): ####onLocalCandidate()com.ericsson.research.owr.sdk.RtcCandidateImpl@41e91b18
03-17 18:47:42.106: I/RTCNativeCall(18928): ####sending candidate: {"candidate":{"sdpMid":"video","candidate":"candidate:10 2 TCP 843055614 219.144.206.197 42688 typ srflx raddr 192.168.2.126 rport 42688 tcptype passive","sdpMLineIndex":0}}
03-17 18:47:42.106: I/RTCNativeCall(18928): ####onLocalCandidate()com.ericsson.research.owr.sdk.RtcCandidateImpl@41ed8df8
03-17 18:47:42.106: I/RTCNativeCall(18928): ####sending candidate: {"candidate":{"sdpMid":"video","candidate":"candidate:11 1 UDP 1677722111 219.144.206.197 48166 typ srflx raddr 192.168.2.126 rport 48166","sdpMLineIndex":1}}
03-17 18:47:42.106: I/RTCNativeCall(18928): ####onLocalCandidate()com.ericsson.research.owr.sdk.RtcCandidateImpl@41ed9330
03-17 18:47:42.111: I/RTCNativeCall(18928): ####sending candidate: {"candidate":{"sdpMid":"video","candidate":"candidate:12 1 TCP 847249919 219.144.206.197 0 typ srflx raddr 192.168.2.126 rport 0 tcptype active","sdpMLineIndex":1}}
03-17 18:47:42.111: I/RTCNativeCall(18928): ####onLocalCandidate()com.ericsson.research.owr.sdk.RtcCandidateImpl@41ed9c00
03-17 18:47:42.111: I/RTCNativeCall(18928): ####sending candidate: {"candidate":{"sdpMid":"video","candidate":"candidate:13 1 TCP 843055615 219.144.206.197 51388 typ srflx raddr 192.168.2.126 rport 51388 tcptype passive","sdpMLineIndex":1}}
03-17 18:47:42.891: D/libEGL(18928): loaded /system/lib/egl/libEGL_mali.so
03-17 18:47:42.901: D/libEGL(18928): loaded /system/lib/egl/libGLESv1_CM_mali.so
03-17 18:47:42.906: D/libEGL(18928): loaded /system/lib/egl/libGLESv2_mali.so
03-17 18:47:44.046: D/Camera(18928): app passed NULL surface
03-17 18:47:45.166: D/Camera(18928): app passed NULL surface
03-17 18:47:45.216: D/dalvikvm(18928): GC_FOR_ALLOC freed 1664K, 23% free 11671K/15139K, paused 34ms, total 34ms