android picture viewer

I want to deploy on their phones a picture viewer, the search path for the SD card, I can print pictures in Logcat of each file name, indicating that you can traverse, however, do not show up, it always reminded me of the picture is too large, Even if I put a little picture does not work, help? ? ?<-! Main posts under Banner (D4) -><-! Posts under the main text (D5) ->