I have created this method that should return the full path and file name so that I can uniquely identify a program. However, it only returns C:\Program Files (x86)\Java\jre6\bin\javaw.exe or an empty string instead of the path for the particular program in focus. What is it that I am doing wrong?
private void getFocusWindow() {
HWND focusedWindow = User32.INSTANCE.GetForegroundWindow();
char[] nameName = new char[512];
User32.INSTANCE.GetWindowModuleFileName(focusedWindow, nameName, 512);
System.out.println(nameName);
}
Using psapi:
Solution:
Provides full path and module file name, only exception is in eclipse when it prints out '�'. See #technomage's answer for more detail about GetModuleFileNameEx method.
private void getFocusWindow() {
PsApi psapi = (PsApi) Native.loadLibrary("psapi", PsApi.class);
HWND focusedWindow = User32.INSTANCE.GetForegroundWindow();
byte[] name = new byte[1024];
IntByReference pid = new IntByReference();
User32.INSTANCE.GetWindowThreadProcessId(focusedWindow, pid);
HANDLE process = Kernel32.INSTANCE.OpenProcess(0x0400 | 0x0010, false, pid.getValue());
psapi.GetModuleFileNameExA(process, null, name, 1024);
String nameString= Native.toString(name);
System.out.println(nameString);
}
psapi class:
public interface PsApi extends StdCallLibrary {
int GetModuleFileNameExA(HANDLE process, HANDLE module ,
byte[] name, int i);
}
GetWindowModuleFileName and GetModuleFileName work only with the current process (i.e. you'll only get useful information for the current process's windows) in Windows NT 4 and later.
http://support.microsoft.com/?id=228469
The article recommends using the PSAPI function GetModuleFileNameEx instead.
EDIT
You'll need to convert the Window handle to a module handle (which is probably shorter than converting window handle to PID to module handle). Keep in mind that the window handle is just an address (so you'll need the GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS flag).
Related
I have a problem statement of reading the text of locally open MSWord document. What I understand, using the following approach, given the path of the document, I can perform any operation in the document .
https://github.com/java-native-access/jna/blob/master/contrib/msoffice/src/com/sun/jna/platform/win32/COM/util/office/Wordautomation_KB_313193_Mod.java
But in my case I have a Handle (WinDef.HWND) to the locally opened word object . And I am not able to get the local path from it. I have given the code which I am trying out and I am not able to achieve what I looking for . Please give the any pointer how I can achieve solution of the above .
Please note that the following gives the path of WINWORD.EXE . And
System.out.println("File Path: "+desktop.getFilePath());
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.platform.DesktopWindow;
import com.sun.jna.platform.FileUtils;
import com.sun.jna.platform.WindowUtils;
import com.sun.jna.platform.WindowUtils.NativeWindowUtils;
import com.sun.jna.platform.win32.WinDef;
import com.sun.jna.platform.win32.Kernel32Util;
import com.sun.jna.platform.win32.WinUser;
import com.sun.jna.win32.StdCallLibrary;
import java.util.List;
public class NativeWordpadExtractor {
public static void main(String ar[]){
executeNativeCommands();
}
public static void executeNativeCommands(){
NativeExtractor.User32 user32 = NativeExtractor.User32.INSTANCE;
user32.EnumWindows(new WinUser.WNDENUMPROC() {
int count = 0;
#Override
public boolean callback(WinDef.HWND hWnd, Pointer arg1) {
byte[] windowText = new byte[512];
user32.GetWindowTextA(hWnd, windowText, 512);
String wText = Native.toString(windowText);
// get rid of this if block if you want all windows regardless of whether
// or not they have text
if (wText.isEmpty()) {
return true;
}
if("SampleTextForScreenScrapping_Word - WordPad".equals(wText)){
System.out.println("Got the 'Wordpad'" + hWnd + ", class " + hWnd.getClass() +"getPointer"+ hWnd.getPointer()+ " Text: " + wText);
//WinDef.HWND notePadHwnd = user32.FindWindowA("Wordpad",null );
byte[] fileText = new byte[1024];
System.out.println("fileText : " + WindowUtils.getWindowTitle(hWnd));
List<DesktopWindow> desktops=WindowUtils.getAllWindows(true);
// Approach 1) For getting a handle to the Desktop object . I am not able to achieve result with this.
for(DesktopWindow desktop:desktops){
System.out.println("File Path: "+desktop.getFilePath());
System.out.println("Title : "+desktop.getTitle());
}
System.out.println("fileText : " + WindowUtils.getAllWindows(true));
// Approach 2) For getting a handle to the native object .
// This is also not working
WinDef.HWND editHwnd = user32.FindWindowExA(hWnd, null, null, null);
byte[] lParamStr = new byte[512];
WinDef.LRESULT resultBool = user32.SendMessageA(editHwnd, NativeExtractor.User32.WM_GETTEXT, 512, lParamStr);
System.out.println("The content of the file is : " + Native.toString(lParamStr));
return false;
}
System.out.println("Found window with text " + hWnd + ", total " + ++count + " Text: " + wText);
return true;
}
}, null);
}
interface User32 extends StdCallLibrary {
NativeExtractor.User32 INSTANCE = (NativeExtractor.User32) Native.loadLibrary("user32", NativeExtractor.User32.class);
int WM_SETTEXT = 0x000c;
int WM_GETTEXT = 0x000D;
int GetWindowTextA(WinDef.HWND hWnd, byte[] lpString, int nMaxCount);
boolean EnumWindows(WinUser.WNDENUMPROC lpEnumFunc, Pointer arg);
WinDef.HWND FindWindowA(String lpClassName, String lpWindowName);
WinDef.HWND FindWindowExA(WinDef.HWND hwndParent, WinDef.HWND hwndChildAfter, String lpClassName, String lpWindowName);
WinDef.LRESULT SendMessageA(WinDef.HWND paramHWND, int paramInt, WinDef.WPARAM paramWPARAM, WinDef.LPARAM paramLPARAM);
WinDef.LRESULT SendMessageA(WinDef.HWND editHwnd, int wmGettext, long l, byte[] lParamStr);
int GetClassNameA(WinDef.HWND hWnd, byte[] lpString, int maxCount);
}
}
I'm not quite sure you can achieve what you want, but I'll do what I can to answer your questions to get you closer to the goal.
There are two ways to get the file information: one more generic with Java/JNA and the the other requiring you to peer inside the process memory space. I'll address the first one.
Rather than dealing with a window handle, let's get the Process ID, which is easier to use later. That's relatively straightforward:
IntByReference pidPtr = new IntByReference();
com.sun.jna.platform.win32.User32.INSTANCE.GetWindowThreadProcessId(hWnd, pidPtr);
int pid = pidPtr.getValue();
(Of note, you should probably have your own User32 interface extend the one above so you can just use the one class and not have to fully qualify the JNA version like I did.)
Now, armed with the PID, there are a few options to try to get the path.
If you're lucky and the user opened the file directly (rather than using File>Open), you can recover the commandline they used, and it will likely have the path. You can retrieve this from the WMI class Win32_Process. Full code you can find in my project OSHI in the WindowsOperatingSystem class or you can try using Runtime.getRuntime().exec() to use the commandline WMI version: wmic path Win32_Process where ProcessID=1234 get CommandLine, capturing the result in a BufferedReader (or see OSHI's ExecutingCommand class for an implementation.)
If the command line check is unsuccessful you can search for which file handles are open by that process. The easiest way to do that is to download the Handle utility (but all your users would have to do this) and then just execute the command line handle -p 1234. This will list open files held by that process.
If you can't rely on your users downloading Handle, you can try to implement the same code yourself. This is an undocumented API using NtQuerySystemInformation. See the JNA project Issue 657 for sample code which will iterate all of an operating system's handles, allowing you to look at the files. Given that you already know the PID you can shortcut the iteration after SYSTEM_HANDLE sh = info.Handles[i]; by skipping the remainder of the code unless sh.ProcessID matches your pid. As stated in that issue, the code listed is mostly unsupported and dangerous. There is no guarantee it will work in future versions of Windows.
Finally, you can see what you can do with process memory. Armed with the PID, you could open the Process to get a handle:
HANDLE pHandle = Kernel32.INSTANCE.OpenProcess(WinNT.PROCESS_QUERY_INFORMATION, false, pid);
Then you could enumerate its modules with EnumProcessModules; for each module use GetModuleInformation to retrieve a MODULEINFO structure. This gives you a pointer to memory that you can explore to your heart's content. Of course, accurately knowing at what offsets to find what information requires the API for the executable you're exploring (Word, WordPad, etc., and the appropriate version.) And you need admin rights. This exploration is left as an exercise for the reader.
The situation
I should show 200-350 frames animation in my application. Images have 500x300ish resolution. If user wants to share animation, i have to convert it to Video. For convertion i am using ffmpeg command.
ffmpeg -y -r 1 -i /sdcard/videokit/pic00%d.jpg -i /sdcard/videokit/in.mp3 -strict experimental -ar 44100 -ac 2 -ab 256k -b 2097152 -ar 22050 -vcodec mpeg4 -b 2097152 -s 320x240 /sdcard/videokit/out.mp4
To convert images to video ffmpeg wants actual files not Bitmap or byte[].
Problem
Compressing bitmaps to image files taking to much time. 210 image convertion takes about 1 minute to finish on average device(HTC ONE m7). Converting image files to mp4 takes about 15 seconds on the same device. All together user have to wait about 1.5 minutes.
What i have tried
I changed comrpession format form PNG to JPEG(1.5 minute result is
achieved with JPEG compression(quality=80),with PNG it takes about
2-2.5 minutes) success
Tried to find how pass byte[] or bitmap to ffmpeg - no succes.
QUESTION
Is there any way(library (even native)) to make saving process faster.
Is there any way to pass byte[] or Bitmap objects (i mean png file decompressed to Android Bitmap Class Object) to ffmpeg library video creating method
Is there any other working library which will create mp4(or any supported format(supported by main Social Networks)) from byte[] or Bitmap objects in about 30 seconds(for 200 frames).
You can convert Bitmap (or byte[]) to YUV format quickly, using renderscript (see https://stackoverflow.com/a/39877029/192373). You can pass these YUV frames to ffmpeg library (as suggests halfelf), or use the built-in native MediaCodec which uses dedicated hardware on modt devices (but compression options are less flexible than all-software ffmpeg).
There are two steps slow us down. Compressing image to PNG/JPG and writing them to disk. Both can be skipped if we directly code against ffmpeg libs, instead of calling ffmpeg command. (There are other improvements too, such like GPU encoding and multithreading, but much more complicated.)
Some approaches to code:
Only use C/C++ NDK for android programming. FFmpeg will happily work. But I guess it's not an option here.
Build it from scratch by Java JNI. Not much experience here. I only know this could link java to c/c++ libs.
Some java wrapper. Luckily I found javacpp-presets. (There are others too, but this one is good enough and up to date.)
This library includes a good example ported from famous dranger's ffmpeg tutorial, though it is a demuxing one.
We can try to write a muxing one, following ffmpeg's muxing.c example.
import java.io.*;
import org.bytedeco.javacpp.*;
import static org.bytedeco.javacpp.avcodec.*;
import static org.bytedeco.javacpp.avformat.*;
import static org.bytedeco.javacpp.avutil.*;
import static org.bytedeco.javacpp.swscale.*;
public class Muxer {
public class OutputStream {
public AVStream Stream;
public AVCodecContext Ctx;
public AVFrame Frame;
public SwsContext SwsCtx;
public void setStream(AVStream s) {
this.Stream = s;
}
public AVStream getStream() {
return this.Stream;
}
public void setCodecCtx(AVCodecContext c) {
this.Ctx = c;
}
public AVCodecContext getCodecCtx() {
return this.Ctx;
}
public void setFrame(AVFrame f) {
this.Frame = f;
}
public AVFrame getFrame() {
return this.Frame;
}
public OutputStream() {
Stream = null;
Ctx = null;
Frame = null;
SwsCtx = null;
}
}
public static void main(String[] args) throws IOException {
Muxer t = new Muxer();
OutputStream VideoSt = t.new OutputStream();
AVOutputFormat Fmt = null;
AVFormatContext FmtCtx = new AVFormatContext(null);
AVCodec VideoCodec = null;
AVDictionary Opt = null;
SwsContext SwsCtx = null;
AVPacket Pkt = new AVPacket();
int GotOutput;
int InLineSize[] = new int[1];
String FilePath = "/path/xxx.mp4";
avformat_alloc_output_context2(FmtCtx, null, null, FilePath);
Fmt = FmtCtx.oformat();
AVCodec codec = avcodec_find_encoder_by_name("libx264");
av_format_set_video_codec(FmtCtx, codec);
VideoCodec = avcodec_find_encoder(Fmt.video_codec());
VideoSt.setStream(avformat_new_stream(FmtCtx, null));
AVStream stream = VideoSt.getStream();
VideoSt.getStream().id(FmtCtx.nb_streams() - 1);
VideoSt.setCodecCtx(avcodec_alloc_context3(VideoCodec));
VideoSt.getCodecCtx().codec_id(Fmt.video_codec());
VideoSt.getCodecCtx().bit_rate(5120000);
VideoSt.getCodecCtx().width(1920);
VideoSt.getCodecCtx().height(1080);
AVRational fps = new AVRational();
fps.den(25); fps.num(1);
VideoSt.getStream().time_base(fps);
VideoSt.getCodecCtx().time_base(fps);
VideoSt.getCodecCtx().gop_size(10);
VideoSt.getCodecCtx().max_b_frames();
VideoSt.getCodecCtx().pix_fmt(AV_PIX_FMT_YUV420P);
if ((FmtCtx.oformat().flags() & AVFMT_GLOBALHEADER) != 0)
VideoSt.getCodecCtx().flags(VideoSt.getCodecCtx().flags() | AV_CODEC_FLAG_GLOBAL_HEADER);
avcodec_open2(VideoSt.getCodecCtx(), VideoCodec, Opt);
VideoSt.setFrame(av_frame_alloc());
VideoSt.getFrame().format(VideoSt.getCodecCtx().pix_fmt());
VideoSt.getFrame().width(1920);
VideoSt.getFrame().height(1080);
av_frame_get_buffer(VideoSt.getFrame(), 32);
// should be at least Long or even BigInteger
// it is a unsigned long in C
int nextpts = 0;
av_dump_format(FmtCtx, 0, FilePath, 1);
avio_open(FmtCtx.pb(), FilePath, AVIO_FLAG_WRITE);
avformat_write_header(FmtCtx, Opt);
int[] got_output = { 0 };
while (still_has_input) {
// convert or directly copy your Bytes[] into VideoSt.Frame here
// AVFrame structure has two important data fields:
// AVFrame.data (uint8_t*[]) and AVFrame.linesize (int[])
// data includes pixel values in some formats and linesize is size of each picture line.
// For example, if formats is RGB. linesize should has 3 valid values equaling to `image_width * 3`. And data will point to three arrays containing rgb values.
// But I guess we'll need swscale() to convert pixel format here. From RGB to yuv420p (or other yuv family formats).
Pkt = new AVPacket();
av_init_packet(Pkt);
VideoSt.getFrame().pts(nextpts++);
avcodec_encode_video2(VideoSt.getCodecCtx(), Pkt, VideoSt.getFrame(), got_output);
av_packet_rescale_ts(Pkt, VideoSt.getCodecCtx().time_base(), VideoSt.getStream().time_base());
Pkt.stream_index(VideoSt.getStream().index());
av_interleaved_write_frame(FmtCtx, Pkt);
av_packet_unref(Pkt);
}
// get delayed frames
for (got_output[0] = 1; got_output[0] != 0;) {
Pkt = new AVPacket();
av_init_packet(Pkt);
avcodec_encode_video2(VideoSt.getCodecCtx(), Pkt, null, got_output);
if (got_output[0] > 0) {
av_packet_rescale_ts(Pkt, VideoSt.getCodecCtx().time_base(), VideoSt.getStream().time_base());
Pkt.stream_index(VideoSt.getStream().index());
av_interleaved_write_frame(FmtCtx, Pkt);
}
av_packet_unref(Pkt);
}
// free c structs
avcodec_free_context(VideoSt.getCodecCtx());
av_frame_free(VideoSt.getFrame());
avio_closep(FmtCtx.pb());
avformat_free_context(FmtCtx);
}
}
For porting C code, normally several changes should be done:
Mostly the work is to replace every C struct member access (. and ->) to java getter/setter.
Also there are many C address-of operators &, just delete them.
Change C NULL macro and C++ nullptr pointer to Java null object.
C codes used to check bool result of an int type in if, for, while. Have to compare them with 0 in java.
And there may be other API changes, as long as referencing to javacpp-presets docs, it'll be ok.
Note that I omitted all error handling codes here. It may be needed in real development/production.
Really I don't want to make publicity but to use pkzip and its SDK may be a good
solution. Pkzip compress file to 95% as they say.
The Smartcrypt SDK is available in all major programming languages, including C++, Java, and C#, and can be used to encrypt both structured and unstructured data. Changes to existing applications typically consist of two or three lines of code.
I can't find how to get ListArray variables from an AndroidJavaObject in C#.
I'm trying to make a for function using a Count for the number of items in the ListArray that is stored as an AndroidJavaObject. But I need to know how to get the Count from the AndroidJavaObject and how to use it properly.
This is what I'm using to get the variables, also notice that "packages" is not an AndroidJavaObject[].
AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
AndroidJavaObject currentActivity = jc.GetStatic<AndroidJavaObject>("currentActivity");
int flag = new AndroidJavaClass("android.content.pm.PackageManager").GetStatic<int>("GET_META_DATA");
AndroidJavaObject pm = currentActivity.Call<AndroidJavaObject>("getPackageManager");
AndroidJavaObject packages = pm.Call<AndroidJavaObject>("getInstalledApplications", flag);
it's very rudimentary at this point, but it works thanks to some help from this How to get installed apps list with Unity3D?
The progress thus far stalls at getting the icon, everything else works perfect, I need a way to get either a string that links to the icon somehow, or the Texture2D of the icon. Another alternative would be a to use a AndroidJavaObject that contains a drawable as if it's a Texture2D. I have no idea how to accomplish any of this though.Another Idea I had was to convert it to another variable, like byte[] that can be transferred and converted back, but I have yet to find a method of that which works under the circumstance.
int count = packages.Call<int>("size");
AndroidJavaObject[] links = new AndroidJavaObject[count];
string[] names = new string[count];
Texture2D[] icons = new Texture2D[count];
int ii =0;
for(int i=0; ii<count;){
//get the object
AndroidJavaObject currentObject = packages.Call<AndroidJavaObject>("get", ii );
try{
//try to add the variables to the next entry
links[i] = pm.Call<AndroidJavaObject>("getLaunchIntentForPackage", currentObject.Get<AndroidJavaObject>("processName"));
names[i] = pm.Call<string>("getApplicationLabel", currentObject);
icons[i] = pm.Call<Texture2D>("getApplicationIcon", currentObject);
Debug.Log ("(" + ii + ") " + i +" "+ names[i]);
//go to the next app and entry
i++;
ii++;
}
catch
{
//if it fails, just go to the next app and try to add to that same entry.
Debug.Log("skipped "+ ii);
ii++;
}
}
I really hate to ask two questions in a row here, and I apologize for having to do so, but this is a difficult and seemingly awkward circumstance, that has little to no documentation (that I can find).
First of all the docs on the interop between Unity3D and Android are scarce at best.
The most important thing is that the only interface Unity exposes to work with java object is AndroidJavaObject and that interface has only a couple of methods defined. You can only use those ones and only those.
This means that you don't get a Count object when working with an java array and you'll still be working with AndroidJavaObject.
int count = packages.Call<int>("size"); //getting the size of the array
for( int i = 0; i < count; i++ )
{
//getting the object at location i
AndroidJavaObject currentObject = packages.Call("get", i );
//use currentObject using the same methods as before: Call, CallStatic, Get, GetStatic
}
I know this is verbose, and writing code like this is hard to test, you need to make and apk and deploy it to a device to check that it runs.
Probably a faster way of doing this is to make your own java class that does all this on the java side and expose one method that gets called from the Unity side. This way at least you get the benefit of static typing when making a jar that you'll add in the Plugins/Android folder.
I'm trying to do the same thing here, but my launcher must only show the CardBoard apps. What i've decided is to make a library in java and import it to Unity as a plugin:
This is my Java class:
public class Launcher extends UnityPlayerActivity {
private List<ApplicationInfo> cbApps;
#Override
protected void onStart() {
super.onStart();
PackageManager pm= getPackageManager();
List<ApplicationInfo> lista = pm.getInstalledApplications(PackageManager.GET_META_DATA);
cbApps= new LinkedList<ApplicationInfo>();
for(ApplicationInfo ai : lista){
Intent intentToResolve = new Intent(Intent.ACTION_MAIN);
intentToResolve.addCategory("com.google.intent.category.CARDBOARD");
intentToResolve.setPackage(ai.packageName);
if(pm.resolveActivity(intentToResolve, 0)!=null) {
cbApps.add(ai);
}
}
}
public int getListSize(){
return cbApps.size();
}
And here my C# method:
void Start () {
AndroidJavaClass unity = new AndroidJavaClass ("com.unity3d.player.UnityPlayer");
AndroidJavaObject currentActivity = unity.GetStatic<AndroidJavaObject> ("currentActivity");
texto.text=""+currentActivity.Call<int> ("getListSize");
}
This way I can create in Java every method that I need to acces the list. The problem I'm still having is trying to get the Texture2D of the icons. I've tried returning the Drawable from Java and accesing with a Call just as you did, but it doesn't work at all. I've been 2 days working with that, I'll let you know if I find a solution.
EDIT:
Finally I could get the images:
First in Java I created this method:
public byte[] getIcon(int i) {
BitmapDrawable icon= (BitmapDrawable)context.getPackageManager().getApplicationIcon(cbApps.get(i));
Bitmap bmp = icon.getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
return byteArray;
}
That way I can access the Byte array representing the Drawable from Unity and show it as the main texture of a Plane:
void Start () {
using (AndroidJavaClass unity = new AndroidJavaClass ("com.unity3d.player.UnityPlayer")) {
context = unity.GetStatic<AndroidJavaObject> ("currentActivity");
}
using (AndroidJavaClass pluginClass=new AndroidJavaClass("com.droiders.launcher.Launcher")) {
launcher= pluginClass.CallStatic<AndroidJavaObject>("getInstance", context);
byte[] bytes= launcher.Call<byte[]>("getIcon",0);
Texture2D tex= new Texture2D(2,2);
tex.LoadImage(bytes);
plane.GetComponent<Renderer>().material.mainTexture=tex;
}
}
Hope it helps you. It's been hard but this beast has been tamed :P
Also thanks you all for your ideas.
I start an explorer window in java using
ProcessBuilder pb = new ProcessBuilder("explorer.exe",folderToOpen);
Process p = pb.start();
Before my java program exists, I want to close this window.
It is important, because this folder is actually a virtual folder.
The folder has been created using a java library for creating kernel level virtual filesystem.
When the program exists, the folder ceases to exists.
Windows explorer doesn't realize this, and keeps showing a number of error messages.
These error messages stop only when the user closes the explorer window of the virtual folder.
For better user experience I need to automatically close this virtual folder on exit.
The problem with explorer.exe is that, it doesn't open the new window in the instance used
to send the command. The window is opened in another process. So I don't have the handle
to the process, and so I cannot close it.
I tried the JNA route, but this threw a system error code 5 (meaning access denied )
final String folderName = Paths.get(super.path).getFileName().toString();
final WinDef.HWND[] windowHandle = new WinDef.HWND[1];
User32.INSTANCE.EnumWindows(new WinUser.WNDENUMPROC() {
#Override
public boolean callback(WinDef.HWND hwnd, Pointer pointer) {
char[]c = new char[255];
User32.INSTANCE.GetWindowText(hwnd, c, 250);
String s = new String(c).trim();
System.out.println(s);
if (s.equals(folderName)) {
windowHandle[0] = hwnd;
User32.INSTANCE.DestroyWindow(hwnd);
System.out.println(Kernel32.INSTANCE.GetLastError());
return false;
}
return true;
}
}, Pointer.NULL);
Any suggestion, comments, tips, guide, ideas, hints ?
Thanks :D
Update :
This seems to work, however, the risk is that it might close a similar window ( a window whoes name is same as the window I want to close). This would be bad-side effect.
final String folderName = Paths.get(super.path).getFileName().toString();
User32.INSTANCE.EnumWindows(new WinUser.WNDENUMPROC() {
#Override
public boolean callback(WinDef.HWND hwnd, Pointer pointer) {
char[]c = new char[255];
User32.INSTANCE.GetWindowText(hwnd, c, 250);
String s = new String(c).trim();
System.out.println(s);
if (s.equals(folderName)) {
User32.INSTANCE.PostMessage(hwnd,User32.WM_CLOSE,null,null);
System.out.println(Kernel32.INSTANCE.GetLastError());
return false;
}
return true;
}
}, Pointer.NULL);
anyone there with a better idea ?
Thanks again :D
Use destroy() as shown in Process.
So use p.destroy();
I'm trying to use JNA with USBXPRESS library from SiLabs (siusbxp.dll), and while basic functions work fine, there is a problem with SI_GetDeviceProductString function.
public class usbxpress
{
public interface SiUSBXp extends StdCallLibrary
{
SiUSBXp INSTANCE = (SiUSBXp) Native.loadLibrary("SiUSBXp", SiUSBXp.class);
byte SI_GetNumDevices (IntByReference lpdwNumDevices);
byte SI_GetProductString( int dwDeviceNum, byte[] lpvDeviceString, int dwFlags);
byte SI_Open (int dwDevice, HANDLEByReference cyHandle);
byte SI_GetPartNumber (HANDLE cyHandle, ByteByReference lpbPartNum);
byte SI_GetDeviceProductString (HANDLE cyHandle, PointerByReference lpProduct, ByteByReference lpbLength, int bConvertToASCII);
//byte SI_GetDeviceProductString (HANDLE cyHandle, LPVOID lpProduct, LPBYTE lpbLength, BOOL bConvertToASCII = TRUE); //original c function
}
public static void main(String[] args)
{
//checking number of connected devices
IntByReference lpdwNumDevices = new IntByReference();
SiUSBXp.INSTANCE.SI_GetNumDevices (lpdwNumDevices);
System.out.println(lpdwNumDevices.getValue());
//opening the device
HANDLEByReference dev_handle_ref = new HANDLEByReference();
byte status = SiUSBXp.INSTANCE.SI_Open(0, dev_handle_ref);
System.out.printf("Status %d\n", status);
HANDLE device_handle = dev_handle_ref.getValue();
//checking part number
ByteByReference lpbPartNum = new ByteByReference();
SiUSBXp.INSTANCE.SI_GetPartNumber(device_handle, lpbPartNum);
System.out.printf("Part number is CP210%d\n", lpbPartNum.getValue());
//checking product string - does not work
PointerByReference lpProduct = new PointerByReference();
ByteByReference lpbLength = new ByteByReference();
SiUSBXp.INSTANCE.SI_GetDeviceProductString(device_handle, lpProduct, lpbLength, 1);
}}
when I try to run it I get the following error:
> Exception in thread "main" java.lang.UnsatisfiedLinkError: Error looking up function 'SI_GetDeviceProductString': at com.sun.jna.Function.<init>(Function.java:179)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:391)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:371)
at com.sun.jna.Library$Handler.invoke(Library.java:205)
at $Proxy0.SI_GetDeviceProductString(Unknown Source)
It feels like it's the problem with the default argument of the C-function. I tried to use int as the argument and tried omitting it, but none of these helped.
I didn't even reach the SI_Write (HANDLE cyHandle, LPVOID lpBuffer, DWORD dwBytesToWrite, LPDWORD lpdwBytesWritten, OVERLAPPED* o = NULL); function, which is promising to cause even more problems:)
Could please anyone suggest how can I deal with the default function arguments in JNA?
Update: SI_Write function works fine this way:
byte SI_Write (HANDLE cyHandle, PointerByReference lpBuffer, int dwBytesToWrite, IntByReference lpdwBytesWritten, Pointer o);
...
SiUSBXp.INSTANCE.SI_Write (device_handle, lpBuffer, message.length, lpdwBytesWritten, null);
So the problem is caused by something else, but still it exists.
I've managed to solve the problem by using an older version of the SiUSBXp library, which was found on the internet.
Newer version downloaded from SiLabs website is acting weird - sometimes SI_GetDeviceProductString function is visible in Dependency Walker and sometimes it's not, while older one is fine.