android - Shared preference is taking wrong context -


Hello I am saving my data using shared priority . In my project 2 Activity activities are 1 I am saving data in asynctask >> doinBackground method inside shared priority . In Async work I am downloading many files from the server. When my first file download has started and I am now changing the activities, my activity in the background -1 and my activity in foreground -2 My file is downloading in the background My call to shared priority is also being made at this time SharedePreference returns an empty reference and this dual-pointer gives an exception.

If activity -1 in the foreground is not getting a null pointer exception I 

  02-18 06:45: 55.503: W / system. Er (1242): If any other activity comes in front of the foreground, Java.lang.NullPointerException 02-18 06: 45: 55.503: W / Systems. Er (1242): On info.helper MyPreferences.savePreferences (MyPreferences.java:17) 02-18 06:45: 55.503: W / Systems. ARR (1242): info.activity.DownloadActivity $ DownloadFileFromURL.doInBackground (DownloadActivity.java:820) 02-18 06:45: 55.503: W / Systems. Er (1242): info.activity.DownloadActivity $ DownloadFileFromURL. DoInBackground (DownloadActivity.java:1) 02-18 06:45: 55.503: W / Systems. Er (1242): Android.OS.Sync Task $ 2.Coll (Asinka TaskJava 287) 02-18 06:45: 55.503: W / Systems. Er (1242): java.util.concurrent.FutureTask $ Sync.innerRun (FutureTask.java.35) 02-18 06:45: 55.503: W / Systems. Er (1242): On Java. Util.concurrent.FutureTask.run (FutureTask.java:137) 02-18 06:45: 55.503: W / Systems. Er (1242): Android.OS.Sync Task $ Serial Exchanger $ 1.R (Async Tasks Java 30) 02-18 06:45: 55.503: W / Systems. Er (1242): java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1076) 02-18 06:45: 55.503: W / Systems. Er (1242): On Java. Util.concurrent.ThreadPoolExecutor $ Worker.run (ThreadPoolExecutor.java lessons69) 02-18 06:45: 55.503: W / Systems. Er (1242): java.lang.Thread.run (Thread.Java: 856) 02

Edit # 1

To save application data, normal Method: 

  Save the public static zero Reference (Reference Reference, String Key, String Value) {Share Shared Shared References Reference = Reference. Shared references (MY_ST_PREFS, Context.MODE_PRIVATE); Editor Editor = Shared References Edit (); Editor.putString (key, value); Editor.commit (); }

Save data inside AsyncTask like this: 

  MyPreferences.savePreferences (DownloadActivity.this.getActivity (), "downloading_storyid", downloadingStoryId); Because you are using references in asyntask, this is not pointing to the activity of asyntask

You have to pass the reference in asyntask like this:

youractivityname.this;


Comments

Post a Comment

Popular posts from this blog

ios - How do I use CFArrayRef in Swift? -

I am using Objective-class in my Swift Project through a bridging header. The method signature looks like this: - Some cement (some type) some parameters; I started by getting an example of class, calling method, and storing the value: var myInstance = MyClassWithThatMethod (); Var cfArr = myInstance.someMethod (some value); Then try to get the value in the array: var valueInArrayThatIWant = CFArrayGetValueAtIndex (cfArr, 0); However, I get the error unmanaged & lt; Cfarray & gt; Not like 'CFArray' . Unmanaged & lt; Cfarray & gt; also means? I looked, but I do not need to change the array in a fast array (though it would be good). I need to be able to get value from the array. I also tried CFArray method to pass in a function: func doSomeStuffOnArray (myArray: NSArray) {} Although I get the same error when using: doSomeStuffOnArray (cfArr); // unmanaged & lt; CFArray & gt; I am using CFArray because I want to sto...
Read more

eclipse plugin - Run java code error: Workspace is closed -

To create an automated project, I created a plug-in project with the following dependencies: Org.eclipse.core.resources org.eclipse.equinox.registry org.eclipse.core.runtime and the following The Java class is located in the src folder: Package Examiner; Import org.eclipse.core.resources.IProject; Import org.eclipse.core.resources.IWorkspaceRoot; Import org.eclipse.core.resources.ResourcesPlugin; Import org.eclipse.core.runtime.CoreException; Import org.eclipse.core.runtime.IProgressMonitor; Import org.eclipse.core.runtime.NullProgressMonitor; Public class tes {public static zero main (string [] args) {// TODO auto generated method stub IProgressMonitor progress monitor = new NullProgressMonitor (); IWorkspaceRoot root = ResourcesPlugin.getWorkspace (). GetRoot (); Ipoject project = root.jetproject ("desired projectname"); Try {Project.create (progress monitor); Project.open (progressMonitor); } Grip (CoreException E) {// TODO Auto generated blocking block e....
Read more

c - Error on building source code in VC 6 -

When I create my project in VC6, the BScMKE reports the following error Linking .. Creating Library ... .. / ... / PB / Bean / Debub / ICEERP.Lib and Object ........ P.B. / Bean / DBube / ICREPlay.APP Browse information file ... BSMMK: ​​error can not be read from BK 1505: file '../../PB/bin/TmpOut/ICReplay/Debug/ICReplay_PB.bsc' Error executing bscmake.exe Can someone help me? 2 Reason for reference from: "ICReplay_PB .bsc "file will be corrupted The trunk of the file will be happening with the compiler running out of disk space or is being interrupted when creating .sbr file I think this answer will help you!
Read more