BVNC client source code analysis (android)

BVNC client source code analysis (android)

1. 1) logon Interface
2. 2) Desktop Activity
   3) Start vnc
   4) display Desktop

1. 1) logon Interface
2. Com. iiordanov. bVNC. bVNC. java
   
3. 
   
4. Create logon interface (fill in IP address, PORT, and so on)
   
5. @ Override
   
6. Public void onCreate (Bundle icicle ){
   
7. 
   
8. GoButton = (Button) findViewById (R. id. buttonGO );
   
9. GoButton. setOnClickListener (new View. OnClickListener (){
   
10. @ Override
    
11. Public void onClick (View view ){
    
12. If (ipText. getText (). length ()! = 0 & portText. getText (). length ()! = 0)
    
13. CanvasStart ();
    
14. Else
    
15. Toast. makeText (view. getContext (), R. string. vnc_server_empty, Toast. LENGTH_LONG). show ();
    
16. }
    
17. });
    
18. }
    
19. 
    
20. 
    
21. 
    
22. Private void canvasStart (){
    
23. If (selected = null) return;
    
24. MemoryInfo info = Utils. getMemoryInfo (this );
    
25. If (info. lowMemory)
    
26. System. gc ();
    
27. Start ();
    
28. }
    
29. 
    
30. /**
    
31. * Starts the activity which makes a VNC connection and displays the remote desktop.
    
32. */
    
33. Private void start (){
    
34. IsConnecting = true;
    
35. // Read data from the login interface and write data to the bean
    
36. UpdateSelectedFromView ();
    
37. SaveAndWriteRecent ();
    
38. 
    
39. // Start RemoteCanvasActivity. The parameter is selected. Gen_getValues ()
    
40. Intent intent = new Intent (this, RemoteCanvasActivity. class );
    
41. Intent. putExtra (Constants. CONNECTION, selected. Gen_getValues ());
    
42. StartActivity (intent );
    
43. }
    
44. 
    

2) Desktop Activity

1. Com. iiordanov. bVNC. RemoteCanvasActivity. java
   
2. 
   
3. @ Override
   
4. Public void onCreate (Bundle icicle ){
   
5. Super. onCreate (icicle );
   
6. // Read the bean Parameters
   
7. Initialize ();
   
8. 
   
9. // Continue the connection, that is, initiate a connection to the VNC Server
   
10. ContinueConnecting ();
    
11. }
    
12. 
    
13. 
    
14. Void continueConnecting (){
    
15. 
    
16. // Initialize and define actions for on-screen keys.
    
17. InitializeOnScreenKeys ();
    
18. 
    
19. // Actually initiate a connection
    
20. Canvas. initializeCanvas (connection, database, new Runnable (){
    
21. Public void run (){
    
22. Try {setModes ();} catch (NullPointerException e ){}
    
23. }
    
24. });
    
25. }
    
27. 3) Start vnc
    
28. Com. iiordanov. bVNC. RemoteCanvas. java
    
29. 
    
30. /**
    
31. * Create a view showing a remote desktop connection
    
32. * @ Param context Containing context (activity)
    
33. * @ Param bean Connection settings
    
34. * @ Param setModes Callback to run on UI thread after connection is set up
    
35. */
    
36. Void initializeCanvas (ConnectionBean bean, Database db, final Runnable setModes ){
    
37. 
    
38. Thread t = new Thread (){
    
39. Public void run (){
    
40. Try {
    
41. 
    
42. If (isSpice ){
    
43. StartSpiceConnection ();
    
44. } Else if (isRdp ){
    
45. StartRdpConnection ();
    
46. } Else if (connection. getConnectionType () <4 ){
    
47. // Start the connection
    
48. StartVncConnection ();
    
49. }
    
50. }
    
51. }
    
52. }
    
53. }
    
54. 
    
55. /**
    
56. * Starts a VNC connection using the TightVNC backend.
    
57. * @ Throws Exception
    
58. */
    
59. Private void startVncConnection () throws Exception {
    
60. Log. I (TAG, "Connecting to:" + connection. getAddress () + ", port:" + connection. getPort ());
    
61. 
    
62. String address = getAddress ();
    
63. Int vncPort = getPort (connection. getPort ());
    
64. Boolean anonTLS = (connection. getConnectionType () = Constants. CONN_TYPE_ANONTLS );
    
65. Try {
    
66. Rfb = new RfbProto (decoder, address, vncPort,
    
67. Connection. getPrefEncoding (), connection. getViewOnly ());
    
68. Log. v (TAG, "Connected to server:" + address + "at port:" + vncPort );
    
69. Rfb. initializeAndAuthenticate (connection. getUserName (), connection. getPassword (),
    
70. Connection. getUseRepeater (), connection. getRepeaterId (), anonTLS );
    
71. } Catch (Exception e ){
    
72. Throw new Exception (getContext (). getString (R. string. error_vnc_unable_to_connect) + e. getLocalizedMessage ());
    
73. }
    
74. 
    
75. Rfbconn = rfb;
    
76. Pointer = new RemoteVncPointer (rfbconn, RemoteCanvas. this, handler );
    
77. Keyboard = new RemoteVncKeyboard (rfbconn, RemoteCanvas. this, handler );
    
78. 
    
79. Rfb. writeClientInit ();
    
80. Rfb. readServerInit ();
    
81. InitializeBitmap (displayWidth, displayHeight );
    
82. Decoder. setPixelFormat (rfb );
    
83. 
    
84. Handler. post (new Runnable (){
    
85. Public void run (){
    
86. Pd. setMessage (getContext (). getString (R.string.info _ progress_dialog_downloading ));
    
87. }
    
88. });
    
89. 
    
90. SendUnixAuth ();
    
91. If (connection. getUseLocalCursor ())
    
92. InitializeSoftCursor ();
    
93. 
    
94. Handler. post (drawableSetter );
    
95. Handler. post (setModes );
    
96. Handler. post (handle topinfo );
    
97. 
    
98. // Hide progress dialog
    
99. If (pd. isShowing ())
    
100. Pd. dismiss ();
     
101. 
     
102. Rfb. processProtocol (this, connection. getUseLocalCursor ());
     
103. }
     
104. 
     
105. 4) display Desktop
106. Com. iiordanov. bVNC. RfbProto. java
     
107. RFB Image Display implemented by java
     
108. Public void processProtocol () throws Exception {
     
109. 
     
110. }