Use Toast or update UI in child threads

Toast can only be used on the main UI thread, using the following methods to resolve

First, use Looper, but this method terminates, the code after the child thread

Looper.prepare ();	
Toast.maketext (aactivity.this, "test", Toast.length_short). Show ();
Looper.loop ();

The second kind is to use Handler message

Private final Handler Msghandler = new Handler () {public
        void Handlemessage (msg) {
                switch (MSG.ARG1) {
 
  case r.string.msg_not_network:
                        toast.maketext (Getapplicationcontext (), Getresources (). GetString ( r.string.msg_not_network), Toast.length_short). Show ();
                        break;
                Default: Break;}}
;
 

Using in child threads

Message msg = Msghandler.obtainmessage ();
MSG.ARG1 = r.string.msg_not_network;
Msghandler.sendmessage (msg);