package com.google.zxing.client.j2me;
-import com.google.zxing.MonochromeBitmapSource;
-import com.google.zxing.MultiFormatReader;
-import com.google.zxing.Reader;
-import com.google.zxing.ReaderException;
-import com.google.zxing.Result;
-import com.google.zxing.qrcode.detector.GridSampler;
-
+import javax.microedition.io.ConnectionNotFoundException;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
-import javax.microedition.lcdui.Graphics;
-import javax.microedition.lcdui.Image;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import java.io.IOException;
/**
+ * <p>The actual reader application {@link MIDlet}.</p>
+ *
* @author Sean Owen (srowen@google.com)
*/
-public final class ZXingMIDlet extends MIDlet implements CommandListener {
+public final class ZXingMIDlet extends MIDlet {
- private static final Command DECODE = new Command("Decode", Command.SCREEN, 1);
- private static final Command EXIT = new Command("Exit", Command.EXIT, 1);
+ private Canvas canvas;
+ private Player player;
+ private VideoControl videoControl;
- static {
- GridSampler.setGridSamplerClassName("com.google.zxing.client.j2me.JAIGridSampler");
+ Player getPlayer() {
+ return player;
}
- private Player player;
- private VideoControl videoControl;
+ VideoControl getVideoControl() {
+ return videoControl;
+ }
protected void startApp() throws MIDletStateChangeException {
try {
player = Manager.createPlayer("capture://video");
player.realize();
+ AdvancedMultimediaManager.setZoom(player);
videoControl = (VideoControl) player.getControl("VideoControl");
- Displayable canvas = new VideoCanvas();
+ canvas = new VideoCanvas(this);
+ canvas.setFullScreenMode(true);
videoControl.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, canvas);
videoControl.setDisplayLocation(0, 0);
videoControl.setDisplaySize(canvas.getWidth(), canvas.getHeight());
videoControl.setVisible(true);
- /*
- FormatControl imageFormatControl = (FormatControl)
- player.getControl("javax.microedition.amms.control.ImageFormatControl");
- if (imageFormatControl != null) {
- imageFormatControl.setFormat("image/png");
- imageFormatControl.setParameter(FormatControl.PARAM_VERSION_TYPE, "PNG");
- } else {
- System.out.println("ImageFormatControl not supported");
- }
-
- FocusControl focusControl = (FocusControl)
- player.getControl("javax.microedition.amms.control.FocusControl");
- if (focusControl != null) {
- if (focusControl.isAutoFocusSupported()) {
- focusControl.setFocus(FocusControl.AUTO);
- }
- if (focusControl.isMacroSupported()) {
- focusControl.setMacro(true);
- }
- } else {
- System.out.println("FocusControl not supported");
- }
- */
- canvas.addCommand(DECODE);
- canvas.addCommand(EXIT);
- canvas.setCommandListener(this);
- Display.getDisplay(this).setCurrent(canvas);
player.start();
+ Display.getDisplay(this).setCurrent(canvas);
} catch (IOException ioe) {
throw new MIDletStateChangeException(ioe.toString());
} catch (MediaException me) {
}
}
- public void commandAction(Command command, Displayable displayable) {
- if (command.equals(DECODE)) {
- new SnapshotThread().start();
- } else if (command.equals(EXIT)) {
- destroyApp(false);
- notifyDestroyed();
- }
- }
-
protected void pauseApp() {
if (player != null) {
try {
protected void destroyApp(boolean unconditional) {
if (player != null) {
+ videoControl = null;
+ try {
+ player.stop();
+ } catch (MediaException me) {
+ // continue
+ }
+ player.deallocate();
player.close();
player = null;
- videoControl = null;
}
}
+ void stop() {
+ destroyApp(false);
+ notifyDestroyed();
+ }
+
+ // Convenience methods to show dialogs
+
+ private void showOpenURL(final String text) {
+ Alert alert = new Alert("Open web page?", text, null, AlertType.CONFIRMATION);
+ alert.setTimeout(Alert.FOREVER);
+ final Command cancel = new Command("Cancel", Command.CANCEL, 1);
+ alert.addCommand(cancel);
+ CommandListener listener = new CommandListener() {
+ public void commandAction(Command command, Displayable displayable) {
+ if (command.getCommandType() == Command.OK) {
+ try {
+ platformRequest(text);
+ } catch (ConnectionNotFoundException cnfe) {
+ showError(cnfe);
+ } finally {
+ stop();
+ }
+ } else {
+ // cancel
+ Display.getDisplay(ZXingMIDlet.this).setCurrent(canvas);
+ }
+ }
+ };
+ alert.setCommandListener(listener);
+ showAlert(alert);
+ }
+
private void showAlert(String title, String text) {
Alert alert = new Alert(title, text, null, AlertType.INFO);
alert.setTimeout(Alert.FOREVER);
showAlert(alert);
}
- private void showError(Throwable t) {
+ void showError(Throwable t) {
showAlert(new Alert("Error", t.getMessage(), null, AlertType.ERROR));
}
private void showAlert(Alert alert) {
Display display = Display.getDisplay(this);
- display.setCurrent(alert, display.getCurrent());
+ display.setCurrent(alert, canvas);
}
- private static class VideoCanvas extends Canvas {
- protected void paint(Graphics graphics) {
- // do nothing
- }
- }
-
- private class SnapshotThread extends Thread {
- public void run() {
- try {
- player.stop();
- byte[] snapshot = videoControl.getSnapshot(null);
- Image capturedImage = Image.createImage(snapshot, 0, snapshot.length);
- MonochromeBitmapSource source = new LCDUIImageMonochromeBitmapSource(capturedImage);
- Reader reader = new MultiFormatReader();
- Result result = reader.decode(source);
- showAlert("Barcode detected", result.getText());
- } catch (ReaderException re) {
- showError(re);
- } catch (MediaException me) {
- showError(me);
- } catch (Throwable t) {
- showError(t);
- } finally {
- try {
- player.start();
- } catch (MediaException me) {
- // continue?
- showError(me);
+ /// TODO this whole bit needs to be merged with the code in core-ext -- this is messy and duplicative
+
+ void handleDecodedText(String text) {
+ // This is a crude imitation of the code found in module core-ext, which handles the contents
+ // in a more sophisticated way. It can't be accessed from JavaME just yet because it relies
+ // on URL parsing routines in java.net. This should be somehow worked around: TODO
+ // For now, detect URLs in a simple way, and treat everything else as text
+ if (text.startsWith("http://") || text.startsWith("https://")) {
+ showOpenURL(text);
+ } else if (text.startsWith("HTTP://") || text.startsWith("HTTPS://")) {
+ showOpenURL(decapitalizeProtocol(text));
+ } else if (text.startsWith("URL:")) {
+ showOpenURL(decapitalizeProtocol(text.substring(4)));
+ } else if (text.startsWith("MEBKM:")) {
+ int urlIndex = text.indexOf("URL:", 6);
+ if (urlIndex >= 6) {
+ String url = text.substring( urlIndex + 4);
+ int semicolon = url.indexOf((int) ';');
+ if (semicolon >= 0) {
+ url = url.substring(0, semicolon);
}
+ showOpenURL(decapitalizeProtocol(url));
+ } else {
+ showAlert("Barcode detected", text);
}
+ } else if (maybeURLWithoutScheme(text)) {
+ showOpenURL("http://" + text);
+ } else {
+ showAlert("Barcode detected", text);
+ }
+ }
+ private static String decapitalizeProtocol(String url) {
+ int protocolEnd = url.indexOf("://");
+ if (protocolEnd >= 0) {
+ return url.substring(0, protocolEnd).toLowerCase() + url.substring(protocolEnd);
+ } else {
+ return url;
}
}
+ /**
+ * Crudely guesses that a string may represent a URL if it has a '.' and no spaces.
+ */
+ private static boolean maybeURLWithoutScheme(String text) {
+ return text.indexOf((int) '.') >= 0 && text.indexOf((int) ' ') < 0;
+ }
+
}
projects / zxing.git / blobdiff