我的長久圖庫

ensordatarecord E/AndroidRuntime: FATAL EXCEPTION: main
                                                                                       Process: com.example.thinkpad.sensordatarecord, PID: 31374
                                                                                       java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getLeft()' on a null object reference
                                                                                           at com.example.thinkpad.sensordatarecord.SoundRecordAndAnalysisActivity.onWindowFocusChanged(SoundRecordAndAnalysisActivity.java:88)
                                                                                           at com.android.internal.policy.DecorView.onWindowFocusChanged(DecorView.java:1856)
                                                                                           at android.view.View.dispatchWindowFocusChanged(View.java:11022)
                                                                                           at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:1193)
                                                                                           at android.view.ViewRootImpl$ViewRootHandler.handleMessage(ViewRootImpl.java:4138)
                                                                                           at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                                           at android.os.Looper.loop(Looper.java:154)
                                                                                           at android.app.ActivityThread.main(ActivityThread.java:6776)
                                                                                           at java.lang.reflect.Method.invoke(Native Method)
                                                                                           at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
                                                                                           at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)

這個頁面是我的圖牀

使用方法：

<img src="./xxx.png" width = "360" height = "520" alt="圖片名稱" align=center />