I have a little problem with displaying messages after connection and disconection.
I am trying when press my connection button and establish communication in new Thread to get toast message: You are connected and also if I am not connected to get the toast in the exception:You are not connected.
I tried to replace new Thread with
runOnUiThread(new Runnable() /*but then It underline*/}).start(); at the end of my code as a mistake.When I delete start and run the app it cant connect to my server.
I tried many solutions but none of them works.I will be very appreciative If you can help me.
@Override
public void onClick(View v) {
new Thread(new Runnable() {
@Override
public void run() {
try {
server = serverTxt.getText().toString();
Socket socket = new Socket(server, port);
socket.setSoTimeout(30000);
connected = true;
Toast.makeText(getApplicationContext(), "You are connected",Toast.LENGTH_LONG).show();
//send the message to the server
here = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true);
} catch (Exception e) {
Toast.makeText(getApplicationContext(), "You are not connected",Toast.LENGTH_LONG).show();
}
}
}).start();
}
});
You have to use runOnUiThread as follows:
DO NOT TRY TO USE SOCKET PART IN UI THREAD, IT WILL THROW AN EXCEPTION
new Thread(new Runnable() {
@Override
public void run() {
try {
server = serverTxt.getText().toString();
Socket socket = new Socket(server, port);
socket.setSoTimeout(30000);
connected = true;
//if inside a fragment, call with getActivity().runOnUiThread()
Activity.this.runOnUiThread(new Runnable(){
public void run(){
Toast.makeText(getApplicationContext(), "You are connected",Toast.LENGTH_LONG).show();
}
});
//send the message to the server
here = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true);
} catch (Exception e) {
//if inside a fragment, call with getActivity().runOnUiThread()
Activity.this.runOnUiThread(new Runnable(){
public void run(){
Toast.makeText(getApplicationContext(), "You are not connected",Toast.LENGTH_LONG).show();
}
});
}
}
}).start();
runOnUiThread is a method. .start() works only on Thread objects and is used to start a new thread. here you want your ui(already running) thread to take focus :)