android - Fetching image from url and storing it locally then use these image in listiew -


i want save images url on device , use images stored on device populate listview , wanted know store images on device either on phone memory or in cache

new imagedownloader().execute(downloadurl);   private class imagedownloader extends asynctask {      @override     protected string doinbackground(string... param) {         // todo auto-generated method stub         return downloadbitmap(param[0]);     }      @override     protected void onpreexecute() {         log.i("async-example", "onpreexecute called");     }      @override     protected void onpostexecute(string result) {         log.i("async-example", "onpostexecute called");         bitmap mybitmap = bitmapfactory.decodefile(result));         imageview myimage = (imageview) findviewbyid(r.id.imageviewtest);         myimage.setimagebitmap(mybitmap);         simplewaitdialog.dismiss();      }      private string downloadbitmap(string url) {         // initilize default http client object         final defaulthttpclient client = new defaulthttpclient();          //forming httoget request          final httpget getrequest = new httpget(url);         try {              httpresponse response = client.execute(getrequest);              //check 200 ok success             final int statuscode = response.getstatusline().getstatuscode();              if (statuscode != httpstatus.sc_ok) {                 log.w("imagedownloader", "error " + statuscode +                          " while retrieving bitmap " + url);                 return null;              }              final httpentity entity = response.getentity();             if (entity != null) {                 inputstream inputstream = null;                 try {                     // getting contents stream                      inputstream = entity.getcontent();                      // decoding stream data image bitmap android understands                     final bitmap bitmap = bitmapfactory.decodestream(inputstream);                      return savebitmaptodir(bitmap);                 } {                     if (inputstream != null) {                         inputstream.close();                     }                     entity.consumecontent();                 }             }         } catch (exception e) {             // provide more explicit error message ioexception             getrequest.abort();             log.e("imagedownloader", "something went wrong while" +                     " retrieving bitmap " + url + e.tostring());         }           return null;     }      private string savebitmaptodir(bitmap bmp)     {         fileoutputstream out = null;         file file = null;         try {             simpledateformat s = new simpledateformat("ddmmyyyy_hhmmss");             string datetime = s.format(new date());             string path = environment.getexternalstoragedirectory().tostring();             outputstream fout = null;             file = new file(path, "myapp_"+datetime+".jpg");             out = new fileoutputstream(file);             bmp.compress(bitmap.compressformat.png, 90, out);         } catch (exception e) {             e.printstacktrace();         } {             try {                 if (out != null) {                     out.close();                 }                 return file.getabsolutepath();             } catch (ioexception e) {                 e.printstacktrace();             }         }     } }

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