Android get image from internal/external storage -


i try show created png file in imageview. when start program , click showcreatedpng button, there white blank page on emulator's screen.

and logcat says : (maybe logcat shows errors because of emulator. emulator has 200 mb sd-card but, can not find created png in computer. when start program phone, png saved in gt-i9100\phone folder. guess folder internal folder. anyway, can not see created png file. please help.)

05-21 21:53:39.764: e/bitmapfactory(1335): unable decode stream: java.io.filenotfoundexception: /mnt/sdcard/*.png: open failed: enoent (no such file or directory)

these codes used.

for saving :

private void saveimagetoexternalstorage(bitmap bitmap) {     string qrpath = environment.getexternalstoragedirectory().getabsolutepath() + "/";     try     {        file dir = new file(qrpath);        if (!dir.exists()) {           dir.mkdirs();        }        outputstream fout = null;        file file = new file(qrpath, "qrcode.png");        if(file.exists()){           file.delete();           file.createnewfile();           fout = new fileoutputstream(file);           bitmap.compress(bitmap.compressformat.png, 100, fout);           fout.flush();           fout.close();        }     }     catch (exception e) {       log.e("savetoexternalstorage()", e.getmessage());     } }

and codes png file :

 string qrpath = environment.getexternalstoragedirectory().getabsolutepath() + "/*.png";  bitmapfactory.options options = new bitmapfactory.options();  options.inpreferredconfig = bitmap.config.argb_8888;  bitmap mustopen = bitmapfactory.decodefile(qrpath, options);   setcontentview(r.layout.qr_image);  imageview imageview = (imageview) findviewbyid(r.id.qr_image);  imageview.setimagebitmap(mustopen);

thanks help.

you trying open file called *.png. should qrcode.png, code

environment.getexternalstoragedirectory().getabsolutepath() + "/qrcode.png";

Comments

Post a Comment

Popular posts from this blog

jquery - Common JavaScript snippet to share files on Google Drive, Dropbox, Box.net or SkyDrive -

this first assignment of file sharing. need share files our website above mentioned locations. currently, have been exploring each service’s api file sharing. question 1 : there javascript code snippet available (like addthis.com ) share files? question 2 : should use server side coding file sharing or javascript advisable? thanks viewers. found useful plug-in named "ink file picker". saves given http file resource directly users online storage engine. url: https://developers.inkfilepicker.com/docs/web/ live example: http://ctrlq.org/save/
Read more

user interface - Python attempting to create a simple gui, getting "AttributeError: 'MainMenu' object has no attribute 'intro_screen'" -

complete newbie here python started learning language few days ago (with no programming experience beforehand). i'm bashing skull against desk here, trying create 1 menu button lead menu, supposed replace/hide/destroy previous menu (either works, long process can reversed). what i've come far: import wx class mainframe(wx.frame): def __init__(self): wx.frame.__init__(self, none) self.centre() self.main_menu = mainmenu(self) self.intro_screen = introscreen(self) self.intro_screen.hide() class mainmenu(wx.frame): def __init__(self, parent): wx.frame.__init__(self, parent=parent) self.main_menu = mainmenu panel = wx.panel(self) sizer = wx.boxsizer(wx.vertical) nextscreen = wx.button(panel, label='next screen', size=(150,30)) nextscreen.bind(wx.evt_button, self.nextscreen) sizer.add(nextscreen, 0, wx.center|wx.all, 5) self.show() self.c...
Read more

Android Gson.fromJson error -

i've completed tutorial how connect json url , parse content using gson library. code works fine url specified in tutorial, tryed modify work this url . tryed display 1 field second ulr, base field, can't work. here code, please help: public class jsonparsingactivity extends activity { string url = "http://api.openweathermap.org/data/2.5/weather?q=london,uk"; @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); inputstream source = retrievestream(url); gson gson = new gson();// main gson class reader reader = new inputstreamreader(source); searchresponse response = gson.fromjson(reader, searchresponse.class); //gson.fromjson(string, class) toast.maketext(this, response.base, toast.length_short).show(); } private inputstream retrievestream(string url) { defaulthttpclient client = new defaulthttpclient(); httpget getrequest = new httpget(url);...
Read more