project: 增加web和adb控制，未测试

WebRTCControlled/app/src/main/java/com/ttstd/controlled/webrtc/WebRtcClient.java

@@ -68,6 +68,12 @@ public class WebRtcClient {
     private RemoteDisconnectCallback remoteDisconnectCallback;
     private boolean remoteDisconnectNotified = false;
 
+    // 关键修复：控制端（网页）会在被控端弹出"接受"对话框期间就把 ICE 候选发过来，
+    // 此时 peerConnection 尚未创建 / 远端描述(offer)尚未设置，直接 addIceCandidate 会被丢弃。
+    // 因此先把候选缓存起来，等 setRemoteDescription(offer) 完成后再统一 flush。
+    private boolean remoteDescriptionSet = false;
+    private final List<IceCandidate> pendingRemoteCandidates = new ArrayList<>();
+
     public interface InputCommandCallback {
         void onCommandReceived(byte[] data);
     }
@@ -162,6 +168,8 @@ public class WebRtcClient {
         }
         this.currentControllerId = controllerId;
         this.remoteDisconnectNotified = false;
+        this.remoteDescriptionSet = false;
+        this.pendingRemoteCandidates.clear();
 
         List<PeerConnection.IceServer> iceServers = new ArrayList<>();
         // 建议：如果你有 TURN 服务器，请务必在此处添加，例如：
@@ -237,6 +245,9 @@ public class WebRtcClient {
 
             @Override
             public void onSetSuccess() {
+                // 远端描述(offer)已就绪，先 flush 之前缓存的控制端候选。
+                remoteDescriptionSet = true;
+                flushPendingCandidates();
                 // 创建 Answer
                 MediaConstraints constraints = new MediaConstraints();
                 peerConnection.createAnswer(new AppSdpObserver(new AppSdpObserver.SdpEventListener() {
@@ -297,11 +308,24 @@ public class WebRtcClient {
     }
 
     public void addIceCandidate(IceCandidate candidate) {
+        if (peerConnection == null || !remoteDescriptionSet) {
+            // 连接尚未就绪（还在等待用户接受 / 远端描述未设置），先缓存避免候选被丢弃。
+            pendingRemoteCandidates.add(candidate);
+            return;
+        }
         if (peerConnection != null) {
             peerConnection.addIceCandidate(candidate);
         }
     }
 
+    private void flushPendingCandidates() {
+        if (peerConnection == null) return;
+        for (IceCandidate c : pendingRemoteCandidates) {
+            peerConnection.addIceCandidate(c);
+        }
+        pendingRemoteCandidates.clear();
+    }
+
     public void sendInputResponse(String responseJson) {
         if (dataChannel != null && dataChannel.state() == DataChannel.State.OPEN) {
             DataChannel.Buffer buffer = new DataChannel.Buffer(
@@ -319,6 +343,8 @@ public class WebRtcClient {
     }
 
     private void closeCurrentConnection() {
+        remoteDescriptionSet = false;
+        pendingRemoteCandidates.clear();
         if (dataChannel != null) {
             try {
                 dataChannel.unregisterObserver();