我正在为学校使用开源 Android vnc 客户端 ( https://sourceforge.net/projects/multivnc/ )，我想做以下事情：
我希望帧缓冲区在我滚动/移动手指时更新（而不是在我停止滚动时）。我知道在我移动手指时正在发送输入，但帧缓冲区会等待更新，直到我停止滚动。VNCconn.java 文件在下面，它是更新 VNC 的帧缓冲区所涉及的代码部分是private void processNormalProtocol
当我放下手指时，它会冻结整个帧缓冲区并等待我停止滚动或抬起手指来更新屏幕。
当我放下手指开始滚动时，代码停在：
rfb.readServerMessageType();
因为它在 readServerMessgeType 处停止，所以代码不会转到下面的行来更新 Framebuffer。有大佬知道怎么更新吗？？？
我尝试删除此行（因为我不希望滚动时代码卡在此处）：
int msgType = rfb.readServerMessageType();
但我得到这个错误：
04-25 17:06:38.778 28960-29030/it.anddev.bradipao.janus E/VNCConn: java.lang.Exception: Framebuffer update rectangle too large: 0x0 at (8194,22528)
04-25 17:06:38.778 28960-29030/it.anddev.bradipao.janus W/System.err: java.lang.Exception: Framebuffer update rectangle too large: 0x0 at (8194,22528)
04-25 17:06:38.778 28960-29030/it.anddev.bradipao.janus W/System.err: at it.anddev.bradipao.janus.RfbProto.readFramebufferUpdateRectHdr(RfbProto.java:945)
04-25 17:06:38.778 28960-29030/it.anddev.bradipao.janus W/System.err: at it.anddev.bradipao.janus.VNCConn$VncInputThread.processNormalProtocol(VNCConn.java:423)
我可以按照代码的逻辑看到 readServerMessageType 转到 rfb.java 文件，然后转到 Android Studio 中一个名为“DatainputStream.java”的已关闭文件，这是卡住的地方，遗憾的是不能更改，因为它是一个锁定的文件：
这是涉及更新 Framebuffer 的 VNCConn.java 部分
private void processNormalProtocol(final Context context, final ProgressDialog pd, final Runnable setModes) throws Exception {
// initialize on login
try {
// initialize on login
Log.d(TAG, "Connection initialized");
bitmapData.writeFullUpdateRequest(false);
canvas.handler.post(setModes);
while (maintainConnection) {
bitmapData.syncScroll();
int msgType = rfb.readServerMessageType();
bitmapData.doneWaiting();
switch (msgType) {
case it.anddev.bradipao.janus.RfbProto.FramebufferUpdate:
rfb.readFramebufferUpdate();
for (int i = 0; i < rfb.updateNRects; i++) {
rfb.readFramebufferUpdateRectHdr();
int rx = rfb.updateRectX, ry = rfb.updateRectY;
int rw = rfb.updateRectW, rh = rfb.updateRectH;
if (rfb.updateRectEncoding == it.anddev.bradipao.janus.RfbProto.EncodingLastRect) {
Log.v(TAG, "rfb.EncodingLastRect");
break;
}
if (rfb.updateRectEncoding == it.anddev.bradipao.janus.RfbProto.EncodingNewFBSize) {
rfb.setFramebufferSize(rw, rh);
// - updateFramebufferSize();
Log.v(TAG, "rfb.EncodingNewFBSize");
break;
}
if (rfb.updateRectEncoding == it.anddev.bradipao.janus.RfbProto.EncodingXCursor || rfb.updateRectEncoding == it.anddev.bradipao.janus.RfbProto.EncodingRichCursor) {
// - handleCursorShapeUpdate(rfb.updateRectEncoding,
// rx,
// ry, rw, rh);
Log.v(TAG, "rfb.EncodingCursor");
continue;
}
if (rfb.updateRectEncoding == it.anddev.bradipao.janus.RfbProto.EncodingPointerPos) {
canvas.mouseX = rx;
canvas.mouseY = ry;
continue;
}
rfb.startTiming();
switch (rfb.updateRectEncoding) {
case it.anddev.bradipao.janus.RfbProto.EncodingRaw:
handleRawRect(rx, ry, rw, rh);
break;
case it.anddev.bradipao.janus.RfbProto.EncodingCopyRect:
handleCopyRect(rx, ry, rw, rh);
Log.v(TAG, "CopyRect is Buggy!");
break;
case it.anddev.bradipao.janus.RfbProto.EncodingRRE:
handleRRERect(rx, ry, rw, rh);
break;
case it.anddev.bradipao.janus.RfbProto.EncodingCoRRE:
handleCoRRERect(rx, ry, rw, rh);
break;
case it.anddev.bradipao.janus.RfbProto.EncodingHextile:
handleHextileRect(rx, ry, rw, rh);
break;
case it.anddev.bradipao.janus.RfbProto.EncodingZRLE:
// This case opens RFB readFully, which is linked to the timing of data scroll
System.out.println("FRAME BUFFER UPDATE");
handleZRLERect(rx, ry, rw, rh);
break;
case it.anddev.bradipao.janus.RfbProto.EncodingZlib:
handleZlibRect(rx, ry, rw, rh);
break;
default:
Log.e(TAG, "Unknown RFB rectangle encoding " + rfb.updateRectEncoding + " (0x" + Integer.toHexString(rfb.updateRectEncoding) + ")");
}
rfb.stopTiming();
// Hide progress dialog
canvas.handler.post(new Runnable() {
public void run() {
System.out.println("Public Void RUN is Called");
if(pd.isShowing())
pd.dismiss();
}
});
}
boolean fullUpdateNeeded = false;
if (pendingColorModel != null) {
setPixelFormat();
fullUpdateNeeded = true;
}
setEncodings(true);
if(framebufferUpdatesEnabled)
bitmapData.writeFullUpdateRequest(!fullUpdateNeeded);
break;
}
}
catch (Exception e) {
throw e;
}
finally {
// unlock this lock, probably was held when IO exception occured
try {
bitmapDataPixelsLock.unlock();
}
catch(Exception e) {
}
Log.v(TAG, "Closing VNC Connection");
rfb.close();
System.gc();
}
}
这是 rfb.readServerMessageType() 是什么，它永远不会脱离 is.readUnsignedByte(); 直到滚动停止
int readServerMessageType() throws IOException {
System.out.println("111111");
int msgType = is.readUnsignedByte();
System.out.println("22222");
return msgType;
}
这会调用 Datainputstream.java （已锁定，我无法修改）
public final int readUnsignedByte() throws IOException {
int temp = in.read();
if (temp < 0) {
throw new EOFException();
}
return temp;
}