android - StreamCorruptedException and ObjectInputStream|FileInputStream -


after creating backup of shared preference xml file(programmatically) , saving external storage, created method restoring it, reading data objectinputstream , fileinputstream xml file, , put data in app's shared preference.

this how i'm restoring data:

public void restorefav(context context) {     file src = new file(storagepath+prefs_name+".xml");     objectinputstream input = null;     try {         input = new objectinputstream(new fileinputstream(src));         sharedpreferences.editor prefedit =                       context.getsharedpreferences(prefs_name, context.mode_private).edit();         log.d("pref restore prefedit",prefedit.tostring());         prefedit.clear();         log.d("pref restore prefedit",prefedit.tostring());          map<string, ?> entries = (map<string, ?>) input.readobject();         log.d("pref restore entries",entries.tostring());          (map.entry<string, ?> entry : entries.entryset()) {             object v = entry.getvalue();             log.d("pref restore object v",v.tostring());             string key = entry.getkey();             log.d("pref restore string key", key);             prefedit.putstring(key, ((string) v));         }         prefedit.apply();     } catch (classnotfoundexception | ioexception e) {         e.printstacktrace();     } {         try {             if (input != null) {                 input.close();             }         } catch (ioexception ex) {             ex.printstacktrace();         }     } }

but i'm getting streamcorruptedexception exception.

08-20 18:42:44.228: w/system.err(28802): java.io.streamcorruptedexception 08-20 18:42:44.238: w/system.err(28802):    @ java.io.objectinputstream.readstreamheader(objectinputstream.java:2115) 08-20 18:42:44.238: w/system.err(28802):    @ java.io.objectinputstream.<init>(objectinputstream.java:372)

what doing wrong!?


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