save the image to the gallery in android -


how can save image camera take gallery? have code doesn't save image

private file createimagefile() throws ioexception { // create image file name         string timestamp = new simpledateformat("yyyymmdd_hhmmss").format(new date());         string imagefilename = "jpeg_" + timestamp + "_";         file storagedir = getexternalfilesdir(environment.directory_pictures);         file image = file.createtempfile(                 imagefilename, /* prefix */                 ".jpg", /* suffix */                 storagedir /* directory */         );  // save file: path use action_view intents         mcurrentphotopath = image.getabsolutepath();         return image;     }

and use thise 1 

private void galleryaddpic() {         intent mediascanintent = new intent(intent.action_media_scanner_scan_file);         file f = new file(mcurrentphotopath);         uri contenturi = uri.fromfile(f);         mediascanintent.setdata(contenturi);         this.sendbroadcast(mediascanintent);     }

but doesn't have positive result, in manifest use permission

<uses-permission android:name="android.permission.write_external_storage" android:maxsdkversion="18"/>

from android version m , above, runtime permission required dangerous permission - https://developer.android.com/guide/topics/permissions/requesting.html#normal-dangerous

public void checkpermissiongranted() {     if (build.version.sdk_int >= 23) {         if (!(checkselfpermission(manifest.permission.read_external_storage) == packagemanager.permission_granted)) {             requestpermissions(new string[]{manifest.permission.read_external_storage}, 0);         }     } }  @override public void onrequestpermissionsresult(int requestcode, string[] permissions, int[] grantresults) {     super.onrequestpermissionsresult(requestcode, permissions, grantresults);     if (!(grantresults[0] == packagemanager.permission_granted)) {         log.d(tag, "storage permission not granted");        } else {         // permission granted - resume     } }

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