請問下程序運行在Bitmap.createBitmap位置顯示getWidth空指針異常，該怎么弄呀？？照著老師的代碼敲的，檢查臉三遍確定沒有打錯，望大神解答，謝謝！附上錯誤提示： 01-21 05:09:17.898??? 2566-2696/com.zhaogui.lookface E/AndroidRuntime﹕ FATAL EXCEPTION: Thread-176
??? Process: com.zhaogui.lookface, PID: 2566
??? java.lang.NullPointerException: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference
??????????? at com.zhaogui.lookface.FaceppDetect$1.run(FaceppDetect.java:37)
??????????? at java.lang.Thread.run(Thread.java:818)