点击按钮进入扫码界面,完成之后跳入支付，支付完成之后直接跳转到主页，再次点击扫码进入 则报出如下错误，求解。是我没有直接finish？还存在在栈？

[thisfeng]

java.lang.RuntimeException: startPreview failed at android.hardware.Camera.startPreview(Native Method) at com.uuzuche.lib_zxing.camera.CameraManager.startPreview(CameraManager.java:163) at com.uuzuche.lib_zxing.decoding.CaptureActivityHandler.(CaptureActivityHandler.java:64) at com.uuzuche.lib_zxing.activity.CaptureFragment.initCamera(CaptureFragment.java:156) at com.uuzuche.lib_zxing.activity.CaptureFragment.surfaceCreated(CaptureFragment.java:170) at android.view.SurfaceView.updateWindow(SurfaceView.java:602) at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:184) at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:944) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2184) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1205) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6318) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:862) at android.view.Choreographer.doCallbacks(Choreographer.java:674) at android.view.Choreographer.doFrame(Choreographer.java:610) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:848) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:179) at android.app.ActivityThread.main(ActivityThread.java:5672) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:674)

[thisfeng]

http://blog.csdn.net/davidbeckham2901/article/details/7696497
一般Camera调用open以及startPreview需要确保不多次调用， 我的上面的操作 导致的