device

My program currently gets a list of drives plugged into the computer with File.listRoots() . But, when I plug a camera or an MP3 player into the computer directly (instead of inserting the memory card), it's not listed, nor does it have a drive letter in Windows Explorer. For example, here's the location of my camera: Computer\Canon PowerShot SD750\Removable storage How can I also list cameras/other devices that do not have a drive letter? I assume this will require a JNI library of some sort, but I don't know for sure obviously. Thanks! P.S. Out of desperation, I did try to list the contents

There is this flash memory IC on my board, which is connected to my STM32F04 ARM processor. USB port of the processor is available for the user. I want my flash memory to be detected as storage device when connected to PC via USB. As the first step I defined my USB class as MSC in my program which works fine. Since when I connect my board to PC, it detects a mass storage device connected, giving an error that "You should format the disc before using it". Now the question is that, how I can define my flash as 'the storage' to my processor. The following would probably be a part of your answer:

How do I calculate PPI of Android device. Most specifically Android Tablets. Take a Note that I want to calculate PPI of the device and not DPI. It's easy like one-two-three =) Let's caculate PPI to Nexus 5 , for example. float LCD_Diagonal = 4.95f; int screenHeightPx = 1920; int screenWidthPx = 1080; float PPI = (float)Math.sqrt((double)(screenWidthPx*screenWidthPx + screenHeightPx*screenHeightPx))/LCD_Diagonal; Log.e(TAG, "display_page_screen_ppi: " + String.format(Locale.getDefault(),"%d %s", Math.round(PPI), "ppi")); In result we have 445 ppi that's true according with specs . PPI The

This is bugging me for several days now. I know about the standard stream redirection to the NUL device, but this isn't the case. node.js uses CreateFileW under its fs native/libuv bindings. Unfortunately using something like: require('fs').writeFileSync('NUL', 'foo') creates a NUL file into the cwd that has 3 bytes. I tried writing to the \Device\Null, but since I'm pretty much a *nix head where everything is a file, I failed to actually find a working path for \Device\Null. Such as \\.\Device\Null that throws ENOENT. Any ideas about how to make this work under Windows? This seems to be

As you know android today is many versions many constructors, many screen sizes,... it's quite difficult for developers today to write programs that targets a big part of devices. What would be THE developer must-know practices for this ? tips for fluid layouts. "standards" for developing on any android version. ... Any other ideas ? For Layouts First, you should start off by reading the official Supporting Multiple Screens Best Practices . There are a lot of good tips there, as well as a general idea on what you need to be looking for in terms of compatibility. One thing I've found to be very

Probably there are a lot of similar questions around, but since I know only few solutions to this which I am not sure will work for us, I am looking for something else, maybe new technologies... What we have is this USB device which is not so fancy (of course, it requires a driver to be loaded), and it has couple of C++ dlls to help getting certain output from it. On top, we made a C# desktop application which makes use of the device in a more attractive way (plenty of interop inside). So far so good, but to have the application lifted up to the web in order to gain more flexibility... What

Is there any way to know if my application is running on the emulator or on the device ? I am using this code snippet which works on both Intel and ARM emulators: if (Build.MODEL.contains("google_sdk") || Build.MODEL.contains("Emulator") || Build.MODEL.contains("Android SDK")) { RunsInEmulator = true; } Secure.getString(getContentResolver(), Secure.ANDROID_ID); (where Secure is android.provider.Settings.Secure ) That value will be null on the emulator, non-null on devices. 来源： https://stackoverflow.com/questions/2245654/android-execution-in-emulator-or-device