近期学习Android平台下跨平台音视频通信开发，尽管网上有非常多开源项目供我们參考学习。但音视频效果非常一般，还有非常多不稳定的因素，毕竟是开源嘛。在国内我找到了一个比較好音视频通信解决方式（百度下载官方Anychat for Android 的demo），该案例提供了纯Java语言接口供我们调用，随后我參照官方android demo程序和开发文档并结合自己的见解写了一个android音频通信软件。200行以内代码就搞定了（难以相信吧）。
事实上我仅仅是调用其相关API就可以实现。下面是我自己写的Java代码，以备大家互相学习：
1./**
2. * Android**天
3. * 1、初始化SDK 2、连接server、 3、用户登录。4、进入房间；5、打开本地视频；6、请求对方视频
4. */
5.public class VideoChatActivity extends Activity implements AnyChatBaseEvent
6.{
7. private AnyChatCoreSDK anychat; // 核心SDK
8. private SurfaceView remoteSurfaceView; // 对方视频
9. private SurfaceView localSurfaceView; // 本地视频
10. private ConfigEntity configEntity;
11. private boolean bSelfVideoOpened = false; // 本地视频是否已打开
12. private boolean bOtherVideoOpened = false; // 对方视频是否已打开
13. private TimerTask mTimerTask; // 定时器
14. private Timer mTimer = new Timer(true);
15. private Handler handler; // 用Handler来不间断刷新即时视频
16. private List<String> userlist = new ArrayList<String>();//保存在线用户列表
17. private int userid; // 用户ID
18. @Override
19. public void onCreate(Bundle savedInstanceState)
20. {
21. super.onCreate(savedInstanceState);
22. setContentView(R.layout.activity_video_chat);
23. remoteSurfaceView = (SurfaceView) findViewById(R.id.surface_remote);
24. localSurfaceView = (SurfaceView) findViewById(R.id.surface_local);
25. configEntity = ConfigService.LoadConfig(this);//载入视频通话设置
26. loginSystem();// 初始化SDK 连接server
27. mTimerTask = new TimerTask(){
28. public void run(){
29. Message mesasge = new Message();
30. handler.sendMessage(mesasge);
31. }
32. };
33. mTimer.schedule(mTimerTask, 1000, 100);
34. handler = new Handler(){
35. @Override
36. public void handleMessage(Message msg){
37. VideoChat();// 不间断显示即时视频通话画面
38. super.handleMessage(msg);
39. }
40. };
41. }
42. // 初始化SDK 连接server
43. private void loginSystem(){
44. if (anychat == null){
45. anychat = new AnyChatCoreSDK();
46. anychat.SetBaseEvent(this); // 设置基本事件回调函数
47. if (configEntity.useARMv6Lib != 0) // 使用ARMv6指令集
48. anychat.SetSDKOptionInt(AnyChatDefine.
49. BRAC_SO_CORESDK_USEARMV6LIB, 1);
50. anychat.InitSDK(android.os.Build.VERSION.SDK_INT, 0); // 初始化SDK
51. }
52. anychat.Connect("demo.anychat.cn", 8906);// 连接server
53. }
54. // 显示即时视频通话画面
55. public void VideoChat(){
56. if (!bOtherVideoOpened){
57. if (anychat.GetCameraState(userid) == 2
58. && anychat.GetUserVideoWidth(userid) != 0){
59. SurfaceHolder holder = remoteSurfaceView.getHolder();
60. holder.setFormat(PixelFormat.RGB_565);
61. holder.setFixedSize(anychat.GetUserVideoWidth(userid),
62. anychat.GetUserVideoHeight(userid));
63. Surface s = holder.getSurface(); // 获得视频画面
64. anychat.SetVideoPos(userid, s, 0, 0, 0, 0); // 调用API显示视频画面
65. bOtherVideoOpened = true;
66. }
67. }
68. if (!bSelfVideoOpened){
69. if (anychat.GetCameraState(-1) == 2
70. && anychat.GetUserVideoWidth(-1) != 0){
71. SurfaceHolder holder = localSurfaceView.getHolder();
72. holder.setFormat(PixelFormat.RGB_565);
73. holder.setFixedSize(anychat.GetUserVideoWidth(-1),
74. anychat.GetUserVideoHeight(-1));
75. Surface s = holder.getSurface();
76. anychat.SetVideoPos(-1, s, 0, 0, 0, 0);
77. bSelfVideoOpened = true;
78. }
79. }
80. }
81. public void OnAnyChatConnectMessage(boolean bSuccess){
82. if (!bSuccess){
83. Toast.makeText(VideoChatActivity.this, "连接server失败。自己主动重连。请稍后...", Toast.LENGTH_SHORT).show();
84. }
85. anychat.Login("android", ""); // server连接成功 用户登录
86. }
87. public void OnAnyChatLoginMessage(int dwUserId, int dwErrorCode){
88. if (dwErrorCode == 0) {
89. Toast.makeText(this, "登录成功！", Toast.LENGTH_SHORT).show();
90. anychat.EnterRoom(1, ""); // 用户登录成功 进入房间
91. ApplyVideoConfig();
92. } else {
93. Toast.makeText(this, "登录失败。错误代码：" + dwErrorCode, Toast.LENGTH_SHORT).show();
94. }
95. }
96. public void OnAnyChatEnterRoomMessage(int dwRoomId, int dwErrorCode){
97. if (dwErrorCode == 0) { // 进入房间成功 打开本地音视频
98. Toast.makeText(this, "进入房间成功", Toast.LENGTH_SHORT).show();
99. anychat.UserCameraControl(-1, 1); // 打开本地视频
100. anychat.UserSpeakControl(-1, 1); // 打开本地音频
101. } else {
102. Toast.makeText(this, "进入房间失败，错误代码：" + dwErrorCode, Toast.LENGTH_SHORT).show();
103. }
104. }
105. public void OnAnyChatOnlineUserMessage(int dwUserNum, int dwRoomId){
106. if (dwRoomId == 1){
107. int user[] = anychat.GetOnlineUser();
108. if (user.length != 0){
109. for (int i = 0; i < user.length; i++){
110. userlist.add(user[i]+"");
111. }
112. String temp =userlist.get(0);
113. userid = Integer.parseInt(temp);
114. anychat.UserCameraControl(userid, 1);// 请求用户视频
115. anychat.UserSpeakControl(userid, 1); // 请求用户音频
116. }
117. else {
118. Toast.makeText(VideoChatActivity.this, "当前没有在线用户", Toast.LENGTH_SHORT).show();
119. }
120. }
121. }
122. public void OnAnyChatUserAtRoomMessage(int dwUserId, boolean bEnter){
123. if (bEnter) {//新用户进入房间
124. userlist.add(dwUserId+"");
125. }
126. else { //用户离开房间
127. if (dwUserId == userid)
128. {
129. Toast.makeText(VideoChatActivity.this, "视频用户已下线", Toast.LENGTH_SHORT).show();
130. anychat.UserCameraControl(userid, 0);// 关闭用户视频
131. anychat.UserSpeakControl(userid, 0); // 关闭用户音频
132. userlist.remove(userid+""); //移除该用户
133. if (userlist.size() != 0)
134. {
135. String temp =userlist.get(0);
136. userid = Integer.parseInt(temp);
137. anychat.UserCameraControl(userid, 1);// 请求其它用户视频
138. anychat.UserSpeakControl(userid, 1); // 请求其它用户音频
139. }
140. }
141. else {
142. userlist.remove(dwUserId+""); //移除该用户
143. }
144. }
145. }
146. public void OnAnyChatLinkCloseMessage(int dwErrorCode){
147. Toast.makeText(VideoChatActivity.this, "连接关闭，error：" + dwErrorCode, Toast.LENGTH_SHORT).show();
148. }
149. @Override
150. protected void onDestroy(){ //程序退出
151. anychat.LeaveRoom(-1); //离开房间
152. anychat.Logout(); //注销登录
153. anychat.Release(); //释放资源
154. mTimer.cancel();
155. super.onDestroy();
156. }
157. // 依据配置文件配置视频參数
158. private void ApplyVideoConfig(){
159. if (configEntity.configMode == 1) // 自己定义视频參数配置
160. {
161. // 设置本地视频编码的码率（假设码率为0，则表示使用质量优先模式）
162. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_BITRATECTRL,configEntity.videoBitrate);
163. if (configEntity.videoBitrate == 0)
164. {
165. // 设置本地视频编码的质量
166. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_QUALITYCTRL,configEntity.videoQuality);
167. }
168. // 设置本地视频编码的帧率
169. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_FPSCTRL,configEntity.videoFps);
170. // 设置本地视频编码的关键帧间隔
171. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_GOPCTRL,configEntity.videoFps * 4);
172. // 设置本地视频採集分辨率
173. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_WIDTHCTRL,configEntity.resolution_width);
174. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_HEIGHTCTRL,configEntity.resolution_height);
175. // 设置视频编码预设參数（值越大，编码质量越高，占用CPU资源也会越高）
176. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_PRESETCTRL,configEntity.videoPreset);
177. }
178. // 让视频參数生效
179. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_APPLYPARAM,configEntity.configMode);
180. // P2P设置
181. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_NETWORK_P2PPOLITIC,configEntity.enableP2P);
182. // 本地视频Overlay模式设置
183. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_OVERLAY,configEntity.videoOverlay);
184. // 回音消除设置
185. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_AUDIO_ECHOCTRL,configEntity.enableAEC);
186. // 平台硬件编码设置
187. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_CORESDK_USEHWCODEC,configEntity.useHWCodec);
188. // 视频旋转模式设置
189. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_ROTATECTRL,configEntity.videorotatemode);
190. // 视频平滑播放模式设置
191. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_STREAM_SMOOTHPLAYMODE,configEntity.smoothPlayMode);
192. // 视频採集驱动设置
193. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_CAPDRIVER,configEntity.videoCapDriver);
194. // 本地视频採集偏色修正设置
195. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_FIXCOLORDEVIA,configEntity.fixcolordeviation);
196. // 视频显示驱动设置
197. anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_VIDEOSHOW_DRIVERCTRL,configEntity.videoShowDriver);
198. }
199.}
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该Android音视频解决方式还有文字聊天、发送文件、P2P连接等很有用的功能。
对给开发商，高速实现类似QQ聊天，语音和视频通信是令人兴奋的事情。
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