Android Object Serialization Store
Last Update:2015-07-10
Source: Internet
Author: User
<span id="Label3"></p><p><p>The serialized object needs to implement the serializable interface or the container object</p></p><pre> <span style="color: #008000;"><span style="color: #008000;">/**</span></span><span style="color: #008000;"><span style="color: #008000;">* Save The object * *</span></span><span style="color: #808080;"><span style="color: #808080;">@param</span></span><span style="color: #008000;"><span style="color: #008000;">Context Context *</span></span><span style="color: #808080;"><span style="color: #808080;">@param</span></span><span style="color: #008000;"><span style="color: #008000;">ser serializable Object *</span></span><span style="color: #808080;"><span style="color: #808080;">@param</span></span><span style="color: #008000;"><span style="color: #008000;">File Cache file *</span></span><span style="color: #808080;"><span style="color: #808080;">@throws</span></span><span style="color: #008000;"><span style="color: #008000;">java.io.IOException IOException</span></span><span style="color: #008000;"><span style="color: #008000;">*/</span></span><span style="color: #000000;"><span style="color: #000000;">@SuppressWarnings (</span></span>"JavaDoc"<span style="color: #000000;"><span style="color: #000000;">) </span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Static</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">Boolean</span></span><span style="color: #000000;"><span style="color: #000000;">saveobject (context context, Serializable ser, String file) {fileoutputstr EAM Fos</span></span>=<span style="color: #0000ff;"><span style="color: #0000ff;">NULL</span></span><span style="color: #000000;"><span style="color: #000000;">; ObjectOutputStream Oos</span></span>=<span style="color: #0000ff;"><span style="color: #0000ff;">NULL</span></span><span style="color: #000000;"><span style="color: #000000;">; </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Try</span></span><span style="color: #000000;"><span style="color: #000000;">{fos</span></span>=<span style="color: #000000;"><span style="color: #000000;">context.openfileoutput (file, context.mode_private); Oos</span></span>=<span style="color: #0000ff;"><span style="color: #0000ff;">New</span></span><span style="color: #000000;"><span style="color: #000000;">ObjectOutputStream (fos); Oos.writeobject (ser); Oos.flush (); </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">return</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">true</span></span><span style="color: #000000;"><span style="color: #000000;">; } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Catch</span></span><span style="color: #000000;"><span style="color: #000000;">(Exception E) {e.printstacktrace (); </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">return</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">false</span></span><span style="color: #000000;"><span style="color: #000000;">; } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">finally</span></span><span style="color: #000000;"><span style="color: #000000;"> { </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Try</span></span><span style="color: #000000;"><span style="color: #000000;"> { </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>(oos! =<span style="color: #0000ff;"><span style="color: #0000ff;">NULL</span></span><span style="color: #000000;"><span style="color: #000000;">) Oos.close (); } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Catch</span></span><span style="color: #000000;"><span style="color: #000000;">(Exception E) {e.printstacktrace (); } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Try</span></span><span style="color: #000000;"><span style="color: #000000;"> { </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>(fos! =<span style="color: #0000ff;"><span style="color: #0000ff;">NULL</span></span><span style="color: #000000;"><span style="color: #000000;">) Fos.close (); } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Catch</span></span><span style="color: #000000;"><span style="color: #000000;">(Exception E) {e.printstacktrace (); } } } </span></span><span style="color: #008000;"><span style="color: #008000;">/**</span></span><span style="color: #008000;"><span style="color: #008000;">* Read The object * *</span></span><span style="color: #808080;"><span style="color: #808080;">@param</span></span><span style="color: #008000;"><span style="color: #008000;">Context Context *</span></span><span style="color: #808080;"><span style="color: #808080;">@param</span></span><span style="color: #008000;"><span style="color: #008000;">File Cache file *</span></span><span style="color: #808080;"><span style="color: #808080;">@return</span></span><span style="color: #008000;"><span style="color: #008000;">Serializable Object *</span></span><span style="color: #808080;"><span style="color: #808080;">@throws</span></span><span style="color: #008000;"><span style="color: #008000;">java.io.IOException Exception</span></span><span style="color: #008000;"><span style="color: #008000;">*/</span></span><span style="color: #000000;"><span style="color: #000000;">@SuppressWarnings (</span></span>"JavaDoc"<span style="color: #000000;"><span style="color: #000000;">) </span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Static</span></span><span style="color: #000000;"><span style="color: #000000;">Serializable readobject (context context, String file) {</span></span><span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>(!<span style="color: #000000;"><span style="color: #000000;">Isexistdatacache (context, File))</span></span><span style="color: #0000ff;"><span style="color: #0000ff;">return</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">NULL</span></span><span style="color: #000000;"><span style="color: #000000;">; FileInputStream FIS</span></span>=<span style="color: #0000ff;"><span style="color: #0000ff;">NULL</span></span><span style="color: #000000;"><span style="color: #000000;">; ObjectInputStream Ois</span></span>=<span style="color: #0000ff;"><span style="color: #0000ff;">NULL</span></span><span style="color: #000000;"><span style="color: #000000;">; </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Try</span></span><span style="color: #000000;"><span style="color: #000000;">{fis</span></span>=<span style="color: #000000;"><span style="color: #000000;">Context.openfileinput (file); Ois</span></span>=<span style="color: #0000ff;"><span style="color: #0000ff;">New</span></span><span style="color: #000000;"><span style="color: #000000;">ObjectInputStream (fis); </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">return</span></span><span style="color: #000000;"><span style="color: #000000;">(Serializable) Ois.readobject (); } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Catch</span></span><span style="color: #000000;"><span style="color: #000000;">(filenotfoundexception E) {e.printstacktrace (); } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Catch</span></span><span style="color: #000000;"><span style="color: #000000;">(Exception E) {e.printstacktrace (); </span></span><span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Delete The cache file if the deserialization Failed.</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>(e<span style="color: #0000ff;"><span style="color: #0000ff;">instanceof</span></span><span style="color: #000000;"><span style="color: #000000;">Invalidclassexception) {File Data</span></span>=<span style="color: #000000;"><span style="color: #000000;">Context.getfilestreampath (file); </span></span><span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">noinspection resultofmethodcallignored</span></span><span style="color: #000000;"><span style="color: #000000;">Data.delete (); } } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">finally</span></span><span style="color: #000000;"><span style="color: #000000;"> { </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Try</span></span><span style="color: #000000;"><span style="color: #000000;"> { </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>(ois! =<span style="color: #0000ff;"><span style="color: #0000ff;">NULL</span></span><span style="color: #000000;"><span style="color: #000000;">) Ois.close (); } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Catch</span></span><span style="color: #000000;"><span style="color: #000000;">(Exception E) {e.printstacktrace (); } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Try</span></span><span style="color: #000000;"><span style="color: #000000;"> { </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>(fis! =<span style="color: #0000ff;"><span style="color: #0000ff;">NULL</span></span><span style="color: #000000;"><span style="color: #000000;">) Fis.close (); } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Catch</span></span><span style="color: #000000;"><span style="color: #000000;">(Exception E) {e.printstacktrace (); } } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">return</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">NULL</span></span><span style="color: #000000;"><span style="color: #000000;">; } </span></span><span style="color: #008000;"><span style="color: #008000;">/**</span></span><span style="color: #008000;"><span style="color: #008000;">* Judge Whether the cache file is Readable. * * </span></span><span style="color: #808080;"><span style="color: #808080;">@param</span></span><span style="color: #008000;"><span style="color: #008000;">Context Context *</span></span><span style="color: #808080;"><span style="color: #808080;">@param</span></span><span style="color: #008000;"><span style="color: #008000;">cachefile Cache file *</span></span><span style="color: #808080;"><span style="color: #808080;">@return</span></span><span style="color: #008000;"><span style="color: #008000;">true if the cache file is readable, false otherwise. </span></span><span style="color: #008000;"><span style="color: #008000;">*/</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Static</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">Boolean</span></span><span style="color: #000000;"><span style="color: #000000;">isreaddatacache (context context, String cachefile) {</span></span><span style="color: #0000ff;"><span style="color: #0000ff;">return</span></span>ReadObject (context, cachefile)! =<span style="color: #0000ff;"><span style="color: #0000ff;">NULL</span></span><span style="color: #000000;"><span style="color: #000000;">; } </span></span><span style="color: #008000;"><span style="color: #008000;">/**</span></span><span style="color: #008000;"><span style="color: #008000;">* Juget whether the cache file Exists. * * </span></span><span style="color: #808080;"><span style="color: #808080;">@param</span></span><span style="color: #008000;"><span style="color: #008000;">Context Context *</span></span><span style="color: #808080;"><span style="color: #808080;">@param</span></span><span style="color: #008000;"><span style="color: #008000;">cachefile Cache file *</span></span><span style="color: #808080;"><span style="color: #808080;">@return</span></span><span style="color: #008000;"><span style="color: #008000;">true if the cache data exists, false otherwise. </span></span><span style="color: #008000;"><span style="color: #008000;">*/</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Static</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">Boolean</span></span><span style="color: #000000;"><span style="color: #000000;">isexistdatacache (context context, String cachefile) {</span></span><span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>(context = =<span style="color: #0000ff;"><span style="color: #0000ff;">NULL</span></span><span style="color: #000000;"><span style="color: #000000;">) </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">return</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">false</span></span><span style="color: #000000;"><span style="color: #000000;">; </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Boolean</span></span>exist =<span style="color: #0000ff;"><span style="color: #0000ff;">false</span></span><span style="color: #000000;"><span style="color: #000000;">; File Data</span></span>=<span style="color: #000000;"><span style="color: #000000;">Context.getfilestreampath (cachefile); </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span><span style="color: #000000;"><span style="color: #000000;">(data.exists ()) exist</span></span>=<span style="color: #0000ff;"><span style="color: #0000ff;">true</span></span><span style="color: #000000;"><span style="color: #000000;">; </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">return</span></span><span style="color: #000000;"><span style="color: #000000;">exist; }</span></span></pre><p><p></p></p><p><p>Android Object Serialization Store</p></p></span>
