不可以设置后置摄像头吗

[mczha]

设置为后置摄像头出错

05-22 10:16:29.515 24127-24511/com.zeusee_soft.face_tracking W/System.err: java.lang.NullPointerException: Attempt to read from field 'int android.hardware.Camera$Size.width' on a null object reference
05-22 10:16:29.515 24127-24511/com.zeusee_soft.face_tracking W/System.err: at com.hyq.hm.landmarksticker.CameraOverlap.initCamera(CameraOverlap.java:141)
05-22 10:16:29.515 24127-24511/com.zeusee_soft.face_tracking W/System.err: at com.hyq.hm.landmarksticker.CameraOverlap.openCamera(CameraOverlap.java:74)
05-22 10:16:29.515 24127-24511/com.zeusee_soft.face_tracking W/System.err: at com.hyq.hm.landmarksticker.MainActivity$2$1.run(MainActivity.java:352)
05-22 10:16:29.516 24127-24511/com.zeusee_soft.face_tracking W/System.err: at android.os.Handler.handleCallback(Handler.java:739)
05-22 10:16:29.516 24127-24511/com.zeusee_soft.face_tracking W/System.err: at android.os.Handler.dispatchMessage(Handler.java:95)
05-22 10:16:29.516 24127-24511/com.zeusee_soft.face_tracking W/System.err: at android.os.Looper.loop(Looper.java:148)
05-22 10:16:29.516 24127-24511/com.zeusee_soft.face_tracking W/System.err: at android.os.HandlerThread.run(HandlerThread.java:61)