读取二维码图片时出错

11-11 18:34:30.689: E/LoginActivity(3239): null11-11 18:34:30.689: E/LoginActivity(3239): java.io.FileNotFoundException11-11 18:34:30.689: E/LoginActivity(3239):  at android.database.DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(DatabaseUtils.java:123)11-11 18:34:30.689: E/LoginActivity(3239):  at android.content.ContentProviderProxy.openAssetFile(ContentProviderNative.java:538)11-11 18:34:30.689: E/LoginActivity(3239):  at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:492)11-11 18:34:30.689: E/LoginActivity(3239):  at android.content.ContentResolver.openInputStream(ContentResolver.java:327)11-11 18:34:30.689: E/LoginActivity(3239):  at com.tvie.ivideo.user.LoginActivity.onActivityResult(LoginActivity.java:339)11-11 18:34:30.689: E/LoginActivity(3239):  at android.app.Activity.dispatchActivityResult(Activity.java:3908)11-11 18:34:30.689: E/LoginActivity(3239):  at android.app.ActivityThread.deliverResults(ActivityThread.java:2528)11-11 18:34:30.689: E/LoginActivity(3239):  at android.app.ActivityThread.handleSendResult(ActivityThread.java:2574)11-11 18:34:30.689: E/LoginActivity(3239):  at android.app.ActivityThread.access$2000(ActivityThread.java:117)11-11 18:34:30.689: E/LoginActivity(3239):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:961)11-11 18:34:30.689: E/LoginActivity(3239):  at android.os.Handler.dispatchMessage(Handler.java:99)11-11 18:34:30.689: E/LoginActivity(3239):  at android.os.Looper.loop(Looper.java:130)11-11 18:34:30.689: E/LoginActivity(3239):  at android.app.ActivityThread.main(ActivityThread.java:3683)11-11 18:34:30.689: E/LoginActivity(3239):  at java.lang.reflect.Method.invokeNative(Native Method)11-11 18:34:30.689: E/LoginActivity(3239):  at java.lang.reflect.Method.invoke(Method.java:507)11-11 18:34:30.689: E/LoginActivity(3239):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:895)11-11 18:34:30.689: E/LoginActivity(3239):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:653)11-11 18:34:30.689: E/LoginActivity(3239):  at dalvik.system.NativeStart.main(Native Method)