Java MediaException类代码示例

import javax.microedition.media.MediaException; //导入依赖的package包/类
public static MMAPIPlayer createPlayer(InputStream stream, String mimeType, Runnable onCompletion) throws IOException {
    try {
        Player p = Manager.createPlayer(stream, mimeType);
        p.realize();
        MMAPIPlayer m = new MMAPIPlayer(p);
        m.bindPlayerCleanupOnComplete(p, stream, onCompletion);
        return m;
    } catch (MediaException ex) {
        if ("audio/mpeg".equals(mimeType)) {
            return createPlayer(stream, "audio/mp3", onCompletion);
        }

        ex.printStackTrace();
        throw new IOException(ex.toString());
    }
}
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
/**
 * @inheritDoc
 */
public void paint(com.codename1.ui.Graphics g) {
    if (isVisible()) {
        try {
            VideoControl vidc = (VideoControl) getVideoControl(this);
            if (isFullScreen()) {
                vidc.setDisplayLocation(0, 0);
                vidc.setDisplaySize(Display.getInstance().getDisplayWidth(), Display.getInstance().getDisplayHeight());
            } else {
                vidc.setDisplayLocation(getAbsoluteX(), getAbsoluteY());
                int w = getWidth();
                int h = getHeight();
                if (vidc.getDisplayWidth() != w || vidc.getDisplayHeight() != h) {
                    vidc.setDisplaySize(w, h);
                }
            }
        } catch (MediaException ex) {
            ex.printStackTrace();
        }
    }
}
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
public void setFocus(Controllable player) {
  FocusControl focusControl =
      (FocusControl) getControl(player, "javax.microedition.amms.control.camera.FocusControl");
  if (focusControl != null) {
    try {
      if (focusControl.isMacroSupported() && !focusControl.getMacro()) {
        focusControl.setMacro(true);
      }
      if (focusControl.isAutoFocusSupported()) {
        focusControl.setFocus(FocusControl.AUTO);
        try {
          Thread.sleep(FOCUS_TIME_MS); // let it focus...
        } catch (InterruptedException ie) {
          // continue
        }
        focusControl.setFocus(FocusControl.AUTO_LOCK);
      }
    } catch (MediaException me) {
      // continue
    }
  }
}
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
private byte[] takeSnapshot() throws MediaException {

        String bestEncoding = guessBestEncoding();

        VideoControl videoControl = barCodeScanner.getVideoControl();
        if (videoControl == null) {
            throw new MediaException("Can't obtain video control");
        }
        byte[] snapshot = null;
        try {
            snapshot = videoControl.getSnapshot("".equals(bestEncoding) ? null : bestEncoding);
        } catch (MediaException me) {
        }
        if (snapshot == null) {
            // Fall back on JPEG; seems that some cameras default to PNG even
            // when PNG isn't supported!
            snapshot = videoControl.getSnapshot("encoding=jpeg");
            if (snapshot == null) {
                throw new MediaException("Can't obtain a snapshot");
            }
        }
        return snapshot;
    }
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
private synchronized String guessBestEncoding() throws MediaException {
    if (bestEncoding == null) {
        // Check this property, present on some Nokias?
        String supportsVideoCapture = System.getProperty("supports.video.capture");
        if ("false".equals(supportsVideoCapture)) {
            throw new MediaException("supports.video.capture is false");
        }

        bestEncoding = "";
        String videoSnapshotEncodings = System.getProperty("video.snapshot.encodings");
        if (videoSnapshotEncodings != null) {
            // We know explicitly what the camera supports; see if PNG is among them since
            // Image.createImage() should always support it
            int pngEncodingStart = videoSnapshotEncodings.indexOf("encoding=png");
            if (pngEncodingStart >= 0) {
                int space = videoSnapshotEncodings.indexOf(' ', pngEncodingStart);
                bestEncoding = space >= 0 ?
                        videoSnapshotEncodings.substring(pngEncodingStart, space) :
                        videoSnapshotEncodings.substring(pngEncodingStart);
            }
        }
    }
    return bestEncoding;
}
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
public void setFocus(Controllable player) {

        FocusControl focusControl =
                (FocusControl) getControl(player, "javax.microedition.amms.control.camera.FocusControl");
        if (focusControl != null) {
            try {
                if (focusControl.isMacroSupported() && !focusControl.getMacro()) {
                    focusControl.setMacro(true);
                }
                if (focusControl.isAutoFocusSupported()) {
                    focusControl.setFocus(FocusControl.AUTO);
                    try {
                        Thread.sleep(FOCUS_TIME_MS); // let it focus...
                    } catch (InterruptedException ie) {
                        // continue
                    }
                    focusControl.setFocus(FocusControl.AUTO_LOCK);
                }
            } catch (MediaException me) {
                // continue
            }
        }
    }
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
public static MMAPIPlayer createPlayer(InputStream stream, String mimeType, Runnable onCompletion) throws IOException {
    try {
        Player p = Manager.createPlayer(stream, mimeType);
        p.realize();
        MMAPIPlayer m = new MMAPIPlayer(p);
        m.bindPlayerCleanupOnComplete(p, stream, onCompletion);
        return m;
    } catch (MediaException ex) {
        if("audio/mpeg".equals(mimeType)) {
            return createPlayer(stream, "audio/mp3", onCompletion);
        }

        ex.printStackTrace();
        throw new IOException(ex.toString());
    }
}
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
public void play() {
    if(deleted){
        return;
    }
    try {
        if(playing == null) {
            playing = new Vector();
        }
        synchronized(MMAPIPlayer.class) {
            if(!playing.contains(this)){
                playing.addElement(this);
            }
        }
        nativePlayer.start();
    } catch (MediaException ex) {
        ex.printStackTrace();
        throw new RuntimeException(ex.toString());
    }
}
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
/**
 * Stops playback of any audio currently playing, and deallocates
 * any associated players or state associated with the current
 * audio.
 */
public static void stopAudio() {
    synchronized(audioLock) {
        currentTag = null;
        isPaused = false;
        if(audioPlayer != null){
            try {
                audioPlayer.stop();
            } catch (MediaException e) {
                e.printStackTrace();
            }
            audioPlayer.deallocate();
            audioPlayer.close();
        }
        audioPlayer = null;
    }
}
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
protected IAnswerData getAcquiredData() {

        try {
            processScan();
            if (scannedCode != null)
                return scannedCode;
            else {
                System.out.println("Error returning barcode: Scanning failed");
                showMessage("Error returning barcode: Scanning failed", true);
                return null;
            }
        } catch (MediaException me) {
            showMessage("Error returning image: " + me.getMessage(), false);
            return null;
        } catch (ImageProcessingException ie) {
            showMessage(
                    "Error returning barcode: " + ie.getMessage() == null ? ""
                            : ie.getMessage(), barcodeProcessor == null ? false
                            : true);
            return null;
        }

    }
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
public void stopRecord() throws AudioException
{
    try
    {
        recordControl.commit();
        recordP.stop();

        serviceState = AudioCaptureService.CAPTURE_STOPPED;
    }
    catch(MediaException me)
    {
        throw new AudioException(me.getMessage());
    }
    catch(IOException ioe)
    {
        System.err.println(ioe.getMessage());
    }

}
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
public CameraCanvas(MIDlet midlet, VideoControl videoControl) {
  int width = getWidth();
  int height = getHeight();

 // mMIDlet = midlet;

  videoControl.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, this);
  try {
    videoControl.setDisplayLocation(2, 2);
    videoControl.setDisplaySize(width - 4, height - 4);
  }
  catch (MediaException me) {
    try { videoControl.setDisplayFullScreen(true); }
    catch (MediaException me2) {}
  }
  videoControl.setVisible(true);
}
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
private void showCamera() {
    try {
        mPlayer = Manager.createPlayer("capture://video");
        mPlayer.realize();

        mVideoControl = (VideoControl) mPlayer.getControl("VideoControl");

        //    Command mExitCommand = new Command("Exit", Command.EXIT, 0);
        //    Command mCameraCommand = new Command("Camera", Command.SCREEN, 0);
        mBackCommand = new Command("Back", Command.BACK, 0);
        mCaptureCommand = new Command("Capture", Command.SCREEN, 0);

        Canvas canvas = new CameraCanvas(null, mVideoControl);
        canvas.addCommand(mBackCommand);
        canvas.addCommand(mCaptureCommand);
        canvas.setCommandListener(this);

        J2MEDisplay.setView(canvas);
        mPlayer.start();
    } catch (IOException ioe) {
        handleException(ioe);
    } catch (MediaException me) {
        handleException(me);
    }
}
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
public CameraCanvas(TioPatinhasMIDlet midlet, VideoControl videoControl) {
  int width = getWidth();
  int height = getHeight();
  
  mTioPatinhasMIDlet = midlet;
  
  videoControl.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, this);
  try {
    videoControl.setDisplayLocation(2, 2);
    videoControl.setDisplaySize(width - 4, height - 4);
  }
  catch (MediaException me) {
    try { videoControl.setDisplayFullScreen(true); }
    catch (MediaException me2) {}
  }
  videoControl.setVisible(true);
}
 

import javax.microedition.media.MediaException; //导入依赖的package包/类
/**
 * Stops processing temporarily. If the
 * <code>MediaProcessor</code> is in a <i>UNREALIZED</i>, <i>REALIZED</i> or <i>STOPPED</i> state, the
 * call is ignored. Otherwise, the <code>MediaProcessor</code>
 * either throws a <code>MediaException</code> or moves to
 * <i>STOPPED</i> state and posts <code>PROCESSING_STOPPED</code> event to <code>MediaProcessorListener</code>s.
 *
 * @throws MediaException if the <code>MediaProcessor</code>
 * could not be stopped.
 */
public final void stop() throws MediaException {
    /* do nothing if not in STARTED state */
    if (state != STARTED) {
        return;
    }

    synchronized (stateLock) {
        if (state != STARTED) {
            return;
        }
        
        if (doStop()) {
            notifyStopped();
        } else {
            throw new MediaException("Failed to stop operation");
        }
    }
}