bVNC 客户端源码分析(android)

1)登录界面
2)桌面Activity
3)启动vnc                                                      
4)显示桌面

1)登录界面
com.iiordanov.bVNC.bVNC.java

创建登录界面（填IP，PORT等等
@Override
public void onCreate(Bundle icicle) {

    goButton = (Button) findViewById(R.id.buttonGO);
    goButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        if (ipText.getText().length() != 0 && portText.getText().length() != 0)
            canvasStart();
        else
            Toast.makeText(view.getContext(), R.string.vnc_server_empty, Toast.LENGTH_LONG).show();
        }
    });
}



private void canvasStart() {
    if (selected == null) return;
    MemoryInfo info = Utils.getMemoryInfo(this);
    if (info.lowMemory)
        System.gc();
    start();
}

/**
 * Starts the activity which makes a VNC connection and displays the remote desktop.
 */
private void start () {
    isConnecting = true;
    //从登陆界面读取数据写入bean
    updateSelectedFromView();
    saveAndWriteRecent();

    //启动RemoteCanvasActivity, 参数为selected.Gen_getValues()
    Intent intent = new Intent(this, RemoteCanvasActivity.class);
    intent.putExtra(Constants.CONNECTION,selected.Gen_getValues());
    startActivity(intent);
}

 2)桌面Activity

com.iiordanov.bVNC.RemoteCanvasActivity.java

@Override
public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    //读取bean传过来的参数
    initialize();

    //继续连接，也就是向VNC服务端发起连接
    continueConnecting();
}


void continueConnecting () {

    // Initialize and define actions for on-screen keys.
    initializeOnScreenKeys ();

    //实际发起连接
    canvas.initializeCanvas(connection, database, new Runnable() {
        public void run() {
            try { setModes(); } catch (NullPointerException e) { }
        }
    });
}

3)启动vnc
com.iiordanov.bVNC.RemoteCanvas.java

/**
 * Create a view showing a remote desktop connection
 * @param context Containing context (activity)
 * @param bean Connection settings
 * @param setModes Callback to run on UI thread after connection is set up
 */
void initializeCanvas(ConnectionBean bean, Database db, final Runnable setModes) {

    Thread t = new Thread () {
        public void run() {
            try {

                if (isSpice) {
                    startSpiceConnection();
                } else if (isRdp) {
                    startRdpConnection();
                } else if (connection.getConnectionType() < 4) {
                    //启动连接
                    startVncConnection();
                }
            }
        }
    }
}

/**
 * Starts a VNC connection using the TightVNC backend.
 * @throws Exception
 */
private void startVncConnection() throws Exception {
    Log.i(TAG, "Connecting to: " + connection.getAddress() + ", port: " + connection.getPort());

    String address = getAddress();
    int vncPort = getPort(connection.getPort());
    boolean anonTLS = (connection.getConnectionType() == Constants.CONN_TYPE_ANONTLS);
    try {
        rfb = new RfbProto(decoder, address, vncPort,
                            connection.getPrefEncoding(), connection.getViewOnly());
        Log.v(TAG, "Connected to server: " + address + " at port: " + vncPort);
        rfb.initializeAndAuthenticate(connection.getUserName(), connection.getPassword(),
                                        connection.getUseRepeater(), connection.getRepeaterId(), anonTLS);
    } catch (Exception e) {
        throw new Exception (getContext().getString(R.string.error_vnc_unable_to_connect) + e.getLocalizedMessage());
    }

    rfbconn = rfb;
    pointer = new RemoteVncPointer (rfbconn, RemoteCanvas.this, handler);
    keyboard = new RemoteVncKeyboard (rfbconn, RemoteCanvas.this, handler);

    rfb.writeClientInit();
    rfb.readServerInit();
    initializeBitmap (displayWidth, displayHeight);
    decoder.setPixelFormat(rfb);

    handler.post(new Runnable() {
        public void run() {
            pd.setMessage(getContext().getString(R.string.info_progress_dialog_downloading));
        }
    });

    sendUnixAuth ();
    if (connection.getUseLocalCursor())
        initializeSoftCursor();

    handler.post(drawableSetter);
    handler.post(setModes);
    handler.post(desktopInfo);

    // Hide progress dialog
    if (pd.isShowing())
        pd.dismiss();

    rfb.processProtocol(this, connection.getUseLocalCursor());
}

4)显示桌面
com.iiordanov.bVNC.RfbProto.java
java实现的RFB图像显示
public void processProtocol () throws Exception {

}