@Override
public void run() {
DatagramSocket datagramSocket = null;
while (isContinueListen) {
try {
if (datagramSocket == null) {
datagramSocket = new DatagramSocket(null);
datagramSocket.setReuseAddress(true);
datagramSocket.bind(new InetSocketAddress(listenPort));
datagramSocket.setReceiveBufferSize(512 * 1024);
}
byte[] buffer = new byte[1024 * 1024];
DatagramPacket udpPacket = new DatagramPacket(buffer, buffer.length);
datagramSocket.receive(udpPacket);
LPP.put(udpPacket);
Logg.e(TAG, "收到2000包");
} catch (Exception e) {
e.printStackTrace();
Logg.e(TAG, "收到2000包 error");
continue;
}
}
if (datagramSocket != null) {
datagramSocket.close();
datagramSocket = null;
}
}
@Override
public void run() {
while (isContinueListen) {
DatagramPacket udpPacket = null;
try {
Logg.i(TAG, "准备从LPP列表中取出一个UDP数据报");
udpPacket = LPP.take();
Logg.i(TAG, "从LPP列表中取出了一个UDP数据报");
} catch (InterruptedException e) {
e.printStackTrace();
Logg.e(TAG, "run error");
continue;
}
boolean isScreenLocked = ((ClassWorkActivity) mContext).isScreenLocked();
if (!isScreenLocked) continue;
int packetLen = udpPacket.getLength();
byte[] packetData = udpPacket.getData();
int operationType = myConvertByteArrToInt_bigend(packetData, 0);
System.out.println("操作类型为" + operationType);
// handDraw(packetData);
switch (operationType) {
case OPERATION_TYPE_HANDDRAW:
handDraw(packetData);
break;
case OPERATION_TYPE_ERASE:
eraseArea(packetData);
break;
case OPERATION_TYPE_LINE:
drawLine(packetData);
break;
case OPERATION_TYPE_RECTANGLE:
drawRectangle(packetData);
break;
case OPERATION_TYPE_ELLIPSE:
drawEllipse(packetData);
break;
case OPERATION_TYPE_TEXT:
drawText(packetData);
break;
case OPERATION_TYPE_PAGE:
changePage(packetData);
clearCanvas();
break;
case OPERATION_TYPE_CLEARCANVAS:
clearCanvas();
break;
case OPERATION_TYPE_UNDO:
undo();
break;
case OPERATION_TYPE_REDO:
redo();
break;
case OPERATION_TYPE_MOVECANVAS:
moveCanvas(packetData);
break;
}
} // end of while
} // end of run
private void eraseArea(byte[] packetData) {
try {
int penWidthNum = myConvertByteArrToInt_bigend(packetData, 4);
int penColorNum = myConvertByteArrToInt_bigend(packetData, 8);
int eraserWidth = myConvertByteArrToInt_bigend(packetData, 12);
int eraserHeight = myConvertByteArrToInt_bigend(packetData, 16);
int nums = myConvertByteArrToInt_bigend(packetData, 20);
int BYTES_PER_COORDINATE = 2;
for (int i = 0; i < nums / 4; i++) {
int x =
xCoordinateMap(
myConvertByteArrToShort_bigend(packetData, 24 + i * 2 * BYTES_PER_COORDINATE));
int y =
yCoordinateMap(
myConvertByteArrToShort_bigend(
packetData, 24 + i * 2 * BYTES_PER_COORDINATE + BYTES_PER_COORDINATE));
int x1, y1, x2, y2;
x1 = x - (eraserWidth / 2 + penWidthNum);
y1 = y - (eraserHeight / 2 + penWidthNum);
x2 = x + (eraserWidth / 2 + penWidthNum);
y2 = y + (eraserHeight / 2 + penWidthNum);
if (i == 0) {
mPath = new Path();
mPath.addRect(x1, y1, x2, y2, Direction.CW);
mPaint = getAPaint();
mPaint.setStrokeWidth(penWidthMap.get(penWidthNum));
mPaint.setColor(penColorMap.get(penColorNum));
mPaint.setStyle(Style.FILL_AND_STROKE);
mPaint.setXfermode(new PorterDuffXfermode(Mode.CLEAR));
HistoryItem item = new HistoryItem(HistoryItem.TYPE_PATH, mPaint, mPath, null, null);
undoPathList.add(item); //
mCacheCanvas.drawPath(mPath, mPaint);
} else {
mPath.addRect(x1, y1, x2, y2, Direction.CW);
mPaint.setXfermode(new PorterDuffXfermode(Mode.CLEAR));
mCacheCanvas.drawPath(mPath, mPaint);
}
handler.sendEmptyMessage(CustomDrawViewCH_INVALIDATE);
if (!((ClassWorkActivity) mContext).isScreenLocked()) {
break;
}
} // end of for
} catch (Exception e) {
e.printStackTrace();
Logg.e(TAG, "erase error");
}
}
private void handDraw(byte[] packetData) {
try {
int penWidthNum = myConvertByteArrToInt_bigend(packetData, 4);
int penColorNum = myConvertByteArrToInt_bigend(packetData, 8);
int nums = myConvertByteArrToInt_bigend(packetData, 12);
int BYTES_PER_COORDINATE = 2;
for (int i = 0; i < nums / 4; i++) {
int x =
xCoordinateMap(
myConvertByteArrToShort_bigend(packetData, 16 + i * 2 * BYTES_PER_COORDINATE));
int y =
yCoordinateMap(
myConvertByteArrToShort_bigend(
packetData, 16 + i * 2 * BYTES_PER_COORDINATE + BYTES_PER_COORDINATE));
String str = (i + 1) + " (x=" + x + ",y=" + y + ")";
writeToMyLogFile(str);
if (i == 0) {
lastX = x;
lastY = y;
mPath = new Path();
mPath.moveTo(x, y);
mPaint = getAPaint();
mPaint.setStrokeWidth(penWidthMap.get(penWidthNum));
mPaint.setColor(penColorMap.get(penColorNum));
HistoryItem item = new HistoryItem(HistoryItem.TYPE_PATH, mPaint, mPath, null, null);
undoPathList.add(item); //
mCacheCanvas.drawPoint(x, y, mPaint);
} else {
int dx = Math.abs(x - lastX);
int dy = Math.abs(y - lastY);
if (dx >= BezierCurveMinGap || dy >= BezierCurveMinGap) {
mPath.quadTo(lastX, lastY, ((lastX + x) / 2.0f), ((lastY + y) / 2.0f));
lastX = x;
lastY = y;
mCacheCanvas.drawPath(mPath, mPaint);
handler.sendEmptyMessage(CustomDrawViewCH_INVALIDATE);
}
}
}
} catch (Exception e) {
e.printStackTrace();
Logg.e(TAG, "handdraw error");
}
}
private void changePage(byte[] packetData) {
try {
int pageIndex = myConvertByteArrToInt_bigend(packetData, 4);
int pagePart = myConvertByteArrToInt_bigend(packetData, 8);
int strByteLen = myConvertByteArrToInt_bigend(packetData, 12);
String dirName = myConvertByteArrToStr_bigend(packetData, 16, strByteLen);
Message msg = new Message();
msg.what = MSG_CHANGE_PAGE;
msg.arg1 = pageIndex;
msg.arg2 = pagePart;
msg.obj = dirName;
handler.sendMessage(msg);
} catch (Exception e) {
e.printStackTrace();
Logg.e(TAG, "changePage error");
}
}