最近学习Android平台下跨平台音视频通信开发，虽然网上有很多开源项目供我们参考学习，但音视频效果很一般，还有很多不稳定的因素，毕竟是开源嘛。在国内我找到了一个比较好音视频通信解决方案，该案例提供了纯Java语言接口供我们调用，随后我参照官方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）。其实我只是调用其相关API即可实现。以下是我自己写的Java代码，以备大家互相学习：

/**
 * Android视频聊天 
 * 1、初始化SDK 2、连接服务器、 3、用户登录；4、进入房间；5、打开本地视频；6、请求对方视频
 */
public class VideoChatActivity extends Activity implements AnyChatBaseEvent
{
private AnyChatCoreSDK anychat; // 核心SDK
private SurfaceView remoteSurfaceView; // 对方视频
private SurfaceView localSurfaceView; // 本地视频
private ConfigEntity configEntity;
private boolean bSelfVideoOpened = false; // 本地视频是否已打开
private boolean bOtherVideoOpened = false; // 对方视频是否已打开
private TimerTask mTimerTask; // 定时器
private Timer mTimer = new Timer(true);
private Handler handler; // 用Handler来不间断刷新即时视频
private List<String> userlist = new ArrayList<String>();//保存在线用户列表
private int userid; // 用户ID
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_video_chat);
remoteSurfaceView = (SurfaceView) findViewById(R.id.surface_remote);
localSurfaceView = (SurfaceView) findViewById(R.id.surface_local);
configEntity = ConfigService.LoadConfig(this);//加载视频通话设置
loginSystem();// 初始化SDK 连接服务器
mTimerTask = new TimerTask(){
public void run(){
Message mesasge = new Message();
handler.sendMessage(mesasge);
}
};
mTimer.schedule(mTimerTask, 1000, 100);
handler = new Handler(){
@Override
public void handleMessage(Message msg){
VideoChat();// 不间断显示即时视频通话画面
super.handleMessage(msg);
}
};
}
// 初始化SDK 连接服务器
private void loginSystem(){
if (anychat == null){
anychat = new AnyChatCoreSDK();
anychat.SetBaseEvent(this);// 设置基本事件回调函数
if (configEntity.useARMv6Lib != 0)// 使用ARMv6指令集
anychat.SetSDKOptionInt(AnyChatDefine.
BRAC_SO_CORESDK_USEARMV6LIB, 1);
anychat.InitSDK(android.os.Build.VERSION.SDK_INT, 0); // 初始化SDK
}
anychat.Connect("demo.anychat.cn", 8906);// 连接服务器
}
// 显示即时视频通话画面
public void VideoChat(){
if (!bOtherVideoOpened){
if (anychat.GetCameraState(userid) == 2
&& anychat.GetUserVideoWidth(userid) != 0){
SurfaceHolder holder = remoteSurfaceView.getHolder();
holder.setFormat(PixelFormat.RGB_565);
holder.setFixedSize(anychat.GetUserVideoWidth(userid),
anychat.GetUserVideoHeight(userid));
Surface s = holder.getSurface();// 获得视频画面
anychat.SetVideoPos(userid, s, 0, 0, 0, 0); // 调用API显示视频画面
bOtherVideoOpened = true;
}
}
if (!bSelfVideoOpened){
if (anychat.GetCameraState(-1) == 2
&& anychat.GetUserVideoWidth(-1) != 0){
SurfaceHolder holder = localSurfaceView.getHolder();
holder.setFormat(PixelFormat.RGB_565);
holder.setFixedSize(anychat.GetUserVideoWidth(-1),
anychat.GetUserVideoHeight(-1));
Surface s = holder.getSurface();
anychat.SetVideoPos(-1, s, 0, 0, 0, 0);
bSelfVideoOpened = true;
}
}
}
public void OnAnyChatConnectMessage(boolean bSuccess){
if (!bSuccess){
Toast.makeText(VideoChatActivity.this, "连接服务器失败，自动重连，请稍后...", Toast.LENGTH_SHORT).show();
}
anychat.Login("android", ""); // 服务器连接成功 用户登录
}
public void OnAnyChatLoginMessage(int dwUserId, int dwErrorCode){
if (dwErrorCode == 0) {
Toast.makeText(this, "登录成功！", Toast.LENGTH_SHORT).show();
anychat.EnterRoom(1, ""); // 用户登录成功 进入房间
ApplyVideoConfig();
} else {
Toast.makeText(this, "登录失败，错误代码：" + dwErrorCode, Toast.LENGTH_SHORT).show();
}
}
public void OnAnyChatEnterRoomMessage(int dwRoomId, int dwErrorCode){
if (dwErrorCode == 0) {// 进入房间成功  打开本地音视频
Toast.makeText(this, "进入房间成功", Toast.LENGTH_SHORT).show();
anychat.UserCameraControl(-1, 1); // 打开本地视频
anychat.UserSpeakControl(-1, 1); // 打开本地音频
} else {
Toast.makeText(this, "进入房间失败，错误代码：" + dwErrorCode, Toast.LENGTH_SHORT).show();
}
}
public void OnAnyChatOnlineUserMessage(int dwUserNum, int dwRoomId){
if (dwRoomId == 1){
int user[] = anychat.GetOnlineUser();
if (user.length != 0){
for (int i = 0; i < user.length; i++){
userlist.add(user[i]+"");
}
String temp =userlist.get(0);
userid = Integer.parseInt(temp);
anychat.UserCameraControl(userid, 1);// 请求用户视频
anychat.UserSpeakControl(userid, 1); // 请求用户音频
}
else {
Toast.makeText(VideoChatActivity.this, "当前没有在线用户", Toast.LENGTH_SHORT).show();
}
}
}
public void OnAnyChatUserAtRoomMessage(int dwUserId, boolean bEnter){
if (bEnter)  {//新用户进入房间
userlist.add(dwUserId+"");
}
else {  //用户离开房间
if (dwUserId == userid)
{
Toast.makeText(VideoChatActivity.this, "视频用户已下线", Toast.LENGTH_SHORT).show();
anychat.UserCameraControl(userid, 0);// 关闭用户视频
anychat.UserSpeakControl(userid, 0); // 关闭用户音频
userlist.remove(userid+"");//移除该用户
if (userlist.size() != 0)
{
String temp =userlist.get(0);
userid = Integer.parseInt(temp);
anychat.UserCameraControl(userid, 1);// 请求其他用户视频
anychat.UserSpeakControl(userid, 1); // 请求其他用户音频
}
}
else {
userlist.remove(dwUserId+"");&nbsp;&nbsp;&nbsp; //移除该用户
}
}
}
public void OnAnyChatLinkCloseMessage(int dwErrorCode){
Toast.makeText(VideoChatActivity.this, "连接关闭，error：" + dwErrorCode, Toast.LENGTH_SHORT).show();
}
@Override
protected void onDestroy(){//程序退出 
anychat.LeaveRoom(-1);//离开房间 
anychat.Logout();//注销登录 
anychat.Release();//释放资源
mTimer.cancel();
super.onDestroy();
}
// 根据配置文件配置视频参数
private void ApplyVideoConfig(){
if (configEntity.configMode == 1) // 自定义视频参数配置
{
// 设置本地视频编码的码率（如果码率为0，则表示使用质量优先模式）
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_BITRATECTRL,configEntity.videoBitrate);
if (configEntity.videoBitrate == 0)
{
// 设置本地视频编码的质量
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_QUALITYCTRL,configEntity.videoQuality);
}
// 设置本地视频编码的帧率
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_FPSCTRL,configEntity.videoFps);
// 设置本地视频编码的关键帧间隔
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_GOPCTRL,configEntity.videoFps * 4);
// 设置本地视频采集分辨率
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_WIDTHCTRL,configEntity.resolution_width);
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_HEIGHTCTRL,configEntity.resolution_height);
// 设置视频编码预设参数（值越大，编码质量越高，占用CPU资源也会越高）
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_PRESETCTRL,configEntity.videoPreset);
}
// 让视频参数生效
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_APPLYPARAM,configEntity.configMode);
// P2P设置
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_NETWORK_P2PPOLITIC,configEntity.enableP2P);
// 本地视频Overlay模式设置
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_OVERLAY,configEntity.videoOverlay);
// 回音消除设置
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_AUDIO_ECHOCTRL,configEntity.enableAEC);
// 平台硬件编码设置
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_CORESDK_USEHWCODEC,configEntity.useHWCodec);
// 视频旋转模式设置
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_ROTATECTRL,configEntity.videorotatemode);
// 视频平滑播放模式设置
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_STREAM_SMOOTHPLAYMODE,configEntity.smoothPlayMode);
// 视频采集驱动设置
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_CAPDRIVER,configEntity.videoCapDriver);
// 本地视频采集偏色修正设置
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_LOCALVIDEO_FIXCOLORDEVIA,configEntity.fixcolordeviation);
// 视频显示驱动设置
anychat.SetSDKOptionInt(AnyChatDefine.BRAC_SO_VIDEOSHOW_DRIVERCTRL,configEntity.videoShowDriver);
}
}

详细看了官方的开发文档你会发现，该Android音视频解决方案还有文字聊天、发送文件、P2P连接等非常实用的功能。对于开发者来说，能快速实现类似QQ聊天和音视频通信是令人振奋的事情。如有不懂可以加QQ讨论：2921533637；也可以去他们官网下载个DAMO测试下：www.anychat.cn

移动视频通话的JAVA源代码