Comments by Xiao Ling (Top 69 by date)

Have you tried Dynamic .NET TWAIN? It's compatible with Windows 8.1.

Please post your code. It's NullPointerException. Have you debugged it with breakpoints?

Why not JTable? I think it's fine. If you don't want to use the component, you can use a canvas to draw what you want.

How could you see the null pointer exception? You probably can't even pass the code compilation.

Which database are you using? You don't need to create a jar file yourself. You can download the specific jdbc from corresponding db websites. For example, you can download sqlite-jdbc-3.7.2.jar to access SQLite.

Do you know where LogCat is? In LogCat, click the button "verbose", and select "error". Then you will see all errors, which could be copied to your clipboard.

Check DDMS, and dump error info. For example, NullPointerException.

Could you please post your crash log?

Why don't you try all of them, and make a comparison? I suggest you can take a little bit of time to evaluate these products.

You just need to use some barcode SDKs (input images -> output string results), and implement the solution you want.

Where did you get the API from? Did you get the relevant shared library?

just import the package in your code, and set the classpath when building your code.

You'd better choose the language you are familiar with. There's no best language. E.g. Facebook's built in PHP. Microsoft's built in ASP.NET and etc.

Do you know how to extract text from a scanned jpg? If yes, you just need to crop the scanned image to generate a new image data for OCR

Sleep only works for the current thread which calls the Sleep method.

WebSocket is an alternative. You can use Jetty on your server side to communicate with Web pages via WebSocket.

Did you notice the sentence "In Java SE 7 and later, you can use a String object in the switch statement's expression", which means it's not compatible with Java SE 6. There are still many people using Java SE6, and thus you'd better care about the compatibility of your code.

You can use StringBuffer to append characters based on your algorithm

Did you set socket timeout?

Do you know which line the code crashed at? You'd better check null pointer before going to next step.

If it is locked, you have to unlock it first

You should set click listener for every ImageView, not just the enter.

What happened when you imported your project into Eclipse? Any errors?

Have you tried JDK7? Same error?

It's UnsatisfiedLinkError which means there's something wrong with your *.so. Could you post the Android.mk and FibLib.java?

JSP is running on server side. When you open the JSP pages in Web browser, they've already been interpreted to pure HTML content. Of course you can download and save the files to any text files, and yet you can't get the logic behind that.

If you want to send text message based on mobile numbers, like iMessage, you have to first figure out how to collect mobile numbers. You can create an application, and ask users to fill their mobile numbers for ID registration. Bind every ID with a phone number, and send information based on that.

How to define the face shape? Elippse? Circle? Rectangle? I don't think there's an algorithm which can tell you what the face shape is, unless you pre-defined the shape. Usually, the face detection algorithm is based on a characteristic library which collects lots of human faces for matching. For better detection ratio, you need to keep training your data. You can learn how OpenCV detects the matched faces.

No, you can't make it below. It's explicitly explained in the book - Thinking in Java

can't open database. Check whether the database exists.

menu -> project -> Build Automatically. Have you checked it?

Please make your effort first.

What do you want to do? Do wrap the DLL in a jar file? or Make the functionality of the jar file same as the DLL (Convert C/C++ to Java)?

No matter on server or client side, you have to create two threads for sending and receiving data.

which variable is null? Could you post the relevant code? I don't see any global variable here

C# is better for Windows 7 or above. As to C, why don't you mix it with C++?

+5

If the window is not opened by JavaScript, how can you get the window reference? If there is no window reference stored with JavaScript, how can you close the window through JavaScript?

You just need to reload the data, and invalidate your UI component.

Thanks for choosing my answer :)

please post your crash log.

Post your code, please

I don't get it. why do you need so many activities in one application? It's a bad design. usually force closes are caused by NullPointerException. why don't you check whether reference is null?

which database are you going to use? MySQL? SQLite? Oracle? ...

Your answer is correct. I give you 5 :)

can you find the jvm.dll? Did you download a new Eclipse from web site, or just use an old one? I presume that you used the one that you backed up before system format. So the old settings caused the error

Have you used any deprecated API or implemented any native library xxx.so?

check your log to see what happened. And you can post relevant code and log here

It's impossible. Although the programming language is same, the underlying framework is totally different. You have to implement it again based on Android framework.

I just made a simple page with only text component. It could work. Probably your problem is not about the page loading, it's about the database access. so you can try to comment out the database access code to verify whether the page loading can work. If it can work, the issue must be caused by database access

could you post the source code of PersonInfo?

If so, I think the best way is to crop the bitmap that you got from FrameLayout.createBitmap(Bitmap source, int x, int y, int width, int height, Matrix m, boolean filter)
Returns an immutable bitmap from subset of the source bitmap, transformed by the optional matrix.

using VPN or changing your DNS can help you connect to Google service.

String text = null; while((text = in.readLine()) != null){Log.i("info", "text: " + text);}

According to your post, you have got what you want. "12-04 06:31:22.368: I/info(1162): text: <!DOCTYPE html>". It is a new issue. Did you set text in the thread? You have to write UI code in main thread. Use runOnUiThread or Handler if you want to refresh your UI in a thread.

could you post exception log?

sorry

probably you forgot to release the port after sending a SMS. double check it.

How did you get the RGB value? Is it a String? Type in by user?

Service is like Activity which is the component of Application. You can create a service running in background. When you create a service in you application, you have to declare it in AndroidManifest.xml. Here is the sample code of Service:
public class LocalService extends Service {
private NotificationManager mNM;

// Unique Identification Number for the Notification.
// We use it on Notification start, and to cancel it.
private int NOTIFICATION = R.string.local_service_started;

/**
* Class for clients to access. Because we know this service always
* runs in the same process as its clients, we don't need to deal with
* IPC.
*/
public class LocalBinder extends Binder {
LocalService getService() {
return LocalService.this;
}
}

@Override
public void onCreate() {
mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

// Display a notification about us starting. We put an icon in the status bar.
showNotification();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("LocalService", "Received start id " + startId + ": " + intent);
// We want this service to continue running until it is explicitly
// stopped, so return sticky.
return START_STICKY;
}

@Override
public void onDestroy() {
// Cancel the persistent notification.
mNM.cancel(NOTIFICATION);

// Tell the user we stopped.
Toast.makeText(this, R.string.local_service_stopped, Toast.LENGTH_SHORT).show();
}

@Override
public IBinder onBind(Intent intent) {
return mBinder;
}

// This is the object that receives interactions from clients. See
// RemoteService for a more complete example.
private final IBinder mBinder = new LocalBinder();

/**
* Show a notification while this service is running.
*/
private void showNotification() {
// In this sample, we'll use the same text for the ticker and the expanded notification
CharSequence text = getText(R.string.local_service_started);

// Set the icon, scrolling text and timestamp
Notification notification = new Notification(R.drawable.stat_sample, text,
System.currentTimeMillis());

// The PendingIntent to launch our activity if the user selects this notification
PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
new Intent(this, LocalServiceActivities.Controller.class), 0);

// Set the info for the views that show in the notification panel.
notification.setLatestEventInfo(this, getText(R.string.local_service_label),
text, contentIntent);

// Send the notification.
mNM.notify(NOTIFICATION, notification);
}
}

check log in logcat

could you post the crash log about the error "UNFORTUNATELY ANDROID APPLICATION HAS STOPED" from logcat? this error means somewhere of your code has an exception. probably it is null exception, or permission exception, or any other.

could you post your crash log? Have you tested your apk on emulator or your own device?