Display all images on android device -

i'm trying create application on 1 of activities displays images on device user chose 1 of them.

i managed display images on dcim/camera folder.

this code displaying images:

gridview gridview = (gridview) findviewbyid(r.id.gridview); imageadapter = new imageadapter(this); gridview.setadapter(imageadapter); gridview.setbackgroundcolor(getresources().getcolor(r.color.black));  string externalstoragedirectorypath = environment.getexternalstoragedirectory().getabsolutepath();  string targetpath = externalstoragedirectorypath + "/dcim/camera";  toast.maketext(getapplicationcontext(), targetpath, toast.length_long).show(); file targetdirector = new file(targetpath);  file[] files = targetdirector.listfiles(); (file file : files)     imageadapter.add(file.getabsolutepath()); 

can me here?

thank in advance!

on click (maybe upload button) :

 intent intent = new intent();                 intent.settype("image/*");                 intent.setaction(intent.action_get_content);                 startactivityforresult(intent.createchooser(intent, "select picture"), pick_image); 

when user has selected image :

 @override     public void onactivityresult(int requestcode, int resultcode, intent data) {         super.onactivityresult(requestcode, resultcode, data);          if (requestcode == pick_image && resultcode == activity.result_ok && null != data) {             uri selectedimage = data.getdata();              bitmapfactory.options options = new bitmapfactory.options();             //options.insamplesize = 8;             final inputstream ist;             try {                 ist = mactivity.getcontentresolver().openinputstream(selectedimage);                 bitmap bitmap = bitmapfactory.decodestream(ist, null, options);                 mpicturepath = compressimage(bitmap).getabsolutepath();                 //recycling bitmap overcome outofmemoryerror                 if(bitmap!=null){                     bitmap.recycle();                     bitmap=null;                 }                 ist.close();              //you have mpicturepath it!             } catch (filenotfoundexception e) {                 logouploadfaied();                 e.printstacktrace();             } catch (ioexception e) {                 logouploadfaied();                 e.printstacktrace();             }         } else {            //not uploading         }     } 

here compress image code, takes in bitmap argument, stores locally (compressed) , returns file path. excellent if want upload images server whatsapp:

 public file compressimage(bitmap bmp) {         bitmap scaledbitmap = null;          int actualheight = bmp.getheight();         int actualwidth = bmp.getwidth();  //      max height , width values of compressed image taken 816x612         float imgratio = actualwidth / actualheight;         float maxratio = logomaxwidth / logomaxheight; //      width , height values set maintaining aspect ratio of image         if (actualheight > logomaxheight || actualwidth > logomaxwidth) {             if (imgratio < maxratio) {                 imgratio = logomaxheight / actualheight;                 actualwidth = (int) (imgratio * actualwidth);                 actualheight = (int) logomaxheight;             } else if (imgratio > maxratio) {                 imgratio = logomaxwidth / actualwidth;                 actualheight = (int) (imgratio * actualheight);                 actualwidth = (int) logomaxwidth;             } else {                 actualheight = (int) logomaxheight;                 actualwidth = (int) logomaxwidth;             }         }         try {             scaledbitmap = bitmap.createscaledbitmap(bmp, actualwidth, actualheight, true);         } catch (outofmemoryerror exception) {             logouploadfaied();             exception.printstacktrace();         }         string uristing = (system.currenttimemillis() + ".jpg");         file file = new file(environment.getexternalstoragedirectory()                 + file.separator + uristing);         try {             file.createnewfile();         } catch (ioexception e) {             logouploadfaied();             e.printstacktrace();         }          fileoutputstream fos = null;         try {             fos = new fileoutputstream(file);         } catch (filenotfoundexception e) {             logouploadfaied();             e.printstacktrace();         }         try {             fos.write(getbytesfrombitmap(scaledbitmap));             fos.close();             //recycling bitmap overcome outofmemoryerror             if(scaledbitmap!=null){                 scaledbitmap.recycle();                 scaledbitmap=null;             }         } catch (ioexception e) {             logouploadfaied();             e.printstacktrace();         }         return file;     }