[英]Android $CalledFromWrongThreadException error when trying to get string to send to socket.io
我正在尝试从 EditText 获取一个字符串并使用 socket.io 发出它,但是,每当它运行时,我都会收到错误 android.view.ViewRootImpl$CalledFromWrongThreadException。
我尝试了什么:
System.out.println("current status : " + socket.connected());
EditText send_message = findViewById(R.id.send_message);
String message = send_message.getText().toString();
MainActivity.this.runOnUiThread(() -> socket.emit("send_message", send_message.getText().toString()));
发生了什么:
E/AndroidRuntime: FATAL EXCEPTION: EventThread
Process: dev.atomtables.atomchat, PID: 3719
android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:6357)
at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:874)
at android.view.View.requestLayout(View.java:17476)
at android.view.View.requestLayout(View.java:17476)
at android.view.View.requestLayout(View.java:17476)
at android.view.View.requestLayout(View.java:17476)
at android.view.View.requestLayout(View.java:17476)
at android.widget.ScrollView.requestLayout(ScrollView.java:1483)
at android.view.View.requestLayout(View.java:17476)
at android.view.ViewGroup.addView(ViewGroup.java:3784)
at android.view.ViewGroup.addView(ViewGroup.java:3727)
at android.view.ViewGroup.addView(ViewGroup.java:3700)
at dev.atomtables.atomchat.MainActivity.onReceiveMessage(MainActivity.java:279)
at dev.atomtables.atomchat.MainActivity.lambda$onCreate$4$dev-atomtables-atomchat-MainActivity(MainActivity.java:98)
at dev.atomtables.atomchat.MainActivity$$ExternalSyntheticLambda5.call(D8$$SyntheticClass)
at io.socket.emitter.Emitter.emit(Emitter.java:117)
at io.socket.client.Socket.onevent(Socket.java:363)
at io.socket.client.Socket.onpacket(Socket.java:307)
at io.socket.client.Socket.access$100(Socket.java:19)
at io.socket.client.Socket$2$2.call(Socket.java:92)
at io.socket.emitter.Emitter.emit(Emitter.java:117)
at io.socket.client.Manager.ondecoded(Manager.java:361)
at io.socket.client.Manager.access$1200(Manager.java:22)
at io.socket.client.Manager$5.call(Manager.java:355)
at io.socket.parser.IOParser$Decoder.add(IOParser.java:103)
at io.socket.client.Manager$2.call(Manager.java:331)
at io.socket.emitter.Emitter.emit(Emitter.java:117)
at io.socket.engineio.client.Socket.onPacket(Socket.java:556)
at io.socket.engineio.client.Socket.access$1000(Socket.java:29)
at io.socket.engineio.client.Socket$5.call(Socket.java:335)
问题不在这里。 Emit 使其发送消息。 该消息在您的套接字库选择的线程上发出。 所以你在套接字的线程上调用 MainActivity.onRecieveMessage 。 您需要 onRecieveMessage 中的 runOnUiThread,而不是此处。 从任何线程发出都很好。
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