TextView not working when I changing activity . #39
Description
I want to add a message option to send message from server to client with this project.
I have two Activities: MainActivity and SecondActivity. On MainActivity I click on a button and go to SecondActivity.
public void msg(View view) {
Intent intent = new Intent(this, secondActivity.class);;
startActivity(intent);
}
SecondActivity
public class SecondActivity extends AppCompatActivity {
private TextView info;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_SecondActivity);
info = findViewById(R.id.terv);
new Thread(new Te()).start();
}
private class Te implements Runnable {
@Override
public void run() {
while (true) {
try {
final String message = (String) MainActivity.objectInputStream.readObject();
if (message != null) {
runOnUiThread(new Runnable() {
@Override
public void run() {
info.append(message);
}
});
}
} catch (IOException | ClassNotFoundException e) {
e.printStackTrace();
}
}
}
}
}
The TextView works smoothly and shows the message when opening the SecondActivity for the first time.
But for the second time, when I go back to MainActivity and open the SecondActivity, the TextView doesn't work.
How can I solve this?