07-05 16:55:57.868: ERROR/AndroidRuntime(7911): java.lang.RuntimeException: An error occured while executing doInBackground()07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at android.os.AsyncTask$3.done(AsyncTask.java:200)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at java.util.concurrent.FutureTask.run(FutureTask.java:137)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at java.lang.Thread.run(Thread.java:1096)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): Caused by: java.lang.NullPointerException07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at java.util.Calendar.setTime(Calendar.java:1288)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at com.glad.android.util.DataChangeUtil.getTimeDiffTOHour(DataChangeUtil.java:101)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at com.glad.android.util.DataChangeUtil.changX(DataChangeUtil.java:54)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at com.glad.android.services.DrawServiceTemp.getDrawGlucoseMetadata(DrawServiceTemp.java:227)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at com.glad.android.view.DrawDynamicLineView.mainProcess(DrawDynamicLineView.java:186)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at com.glad.android.view.DrawDynamicLineView$CanvasImageTask.doInBackground(DrawDynamicLineView.java:142)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at com.glad.android.view.DrawDynamicLineView$CanvasImageTask.doInBackground(DrawDynamicLineView.java:1)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at android.os.AsyncTask$2.call(AsyncTask.java:185)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)07-05 16:55:57.868: ERROR/AndroidRuntime(7911): … 4 more
以上是在AsyncTask方法中执行报错，，在经过多次报错提示后，据我分析，大概是在doInBackground方法中用到的一些参数是不允许执行某些方法的操作
以及在这些参数的获取过程中，如果出错，android也会出现java.lang.RuntimeException: An error occured while executing doInBackground()这个错误，如以上错误就是我的一个参数获取过程中出现的错误。具体原因还要进一步分析！
而只有在充满了艰辛的人生旅途中，
