Sharedpreferences storage complex object Solution

The android SDK for complex object storage service does not provide related APIs. If you want to use an XML node to represent complex objects, it will take a lot of time to parse them, so you can find a simple method, that is, you know how to store serialized objects in the string type with base64.
The following is the tested code used in my project:

/*** Sharedpreferences tool class ** @ author Bobby **/public class sharedpreferencesutils {context; string name; Public sharedpreferencesutils (context, string name) {This. context = context; this. name = Name ;} /*** obtain the value of the value based on the key and expected value types ** @ Param key * @ Param clazz * @ return */Public <t> T getvalue (string key, class <t> clazz) {If (context = NULL) {Throw new runtimeexception (" Please call the construction with the context and name parameters first! ");} Sharedpreferences sp = This. context. getsharedpreferences (this. name, context. mode_private); Return getvalue (Key, clazz, SP );} /*** for complex storage <Object> ** @ Param key * @ Param Val */Public void setobject (string key, object) {sharedpreferences sp = This. context. getsharedpreferences (this. name, context. mode_private); bytearrayoutputstream baos = new bytearrayoutputstream (); objectoutputstream Out = NULL; try {out = new objectoutputstream (baos); out. writeobject (object); string objectval = new string (base64.encode (baos. tobytearray (), base64.default); Editor editor = sp. edit (); Editor. putstring (Key, objectval); Editor. commit ();} catch (ioexception e) {e. printstacktrace ();} finally {try {If (baos! = NULL) {baos. Close ();} If (OUT! = NULL) {out. close () ;}} catch (ioexception e) {e. printstacktrace () ;}}@ suppresswarnings ("unchecked") Public <t> T GetObject (string key, class <t> clazz) {sharedpreferences sp = This. context. getsharedpreferences (this. name, context. mode_private); If (sp. contains (key) {string objectval = sp. getstring (Key, null); byte [] buffer = base64.decode (objectval, base64.default); bytearrayinputstream B AIS = new bytearrayinputstream (buffer); objectinputstream OIS = NULL; try {OIS = new objectinputstream (BAIS); t = (t) Ois. readobject (); Return t;} catch (streamcompuptedexception e) {e. printstacktrace ();} catch (ioexception e) {e. printstacktrace ();} catch (classnotfoundexception e) {e. printstacktrace ();} finally {try {If (BAIS! = NULL) {BAIS. Close ();} If (OIS! = NULL) {Ois. close () ;}} catch (ioexception e) {e. printstacktrace () ;}} return NULL ;} /*** transition method for external visibility ** @ Param key * @ Param clazz * @ Param sp * @ return */@ suppresswarnings ("unchecked ") private <t> T getvalue (string key, class <t> clazz, sharedpreferences SP) {T; try {T = clazz. newinstance (); If (T instanceof integer) {return (t) integer. valueof (sp. getint (Key, 0);} else if (T instanceof string) {return (t) sp. getstring (key, "");} else if (T instanceof Boolean) {return (t) Boolean. valueof (sp. getboolean (Key, false);} else if (T instanceof long) {return (t) Long. valueof (sp. getlong (Key, 0l);} else if (T instanceof float) {return (t) float. valueof (sp. getfloat (Key, 0l);} catch (instantiationexception e) {e. printstacktrace (); log. E ("system", "Type input error or complex types cannot be parsed [" + E. getmessage () + "]");} catch (illegalaccessexception e) {e. printstacktrace (); log. E ("system", "Type input error or complex types cannot be parsed [" + E. getmessage () + "]");} log. E ("system", "cannot find" + key + "corresponding value"); return NULL ;}}

Sharedpreferences storage complex object Solution