Android---hellword Simple tips box

1. Add Common Unit file com: Java

Package Com.example.myapplication;import Android.app.alertdialog;import Android.content.context;import Android.widget.toast;public class COM {//hint information public static void ShowMsg (String msg,context Context) {        Alertdialog.builder dlg = new Alertdialog.builder (context);        Dlg.settitle ("hint");        Dlg.setmessage (msg);        Dlg.setpositivebutton ("OK", null);        Dlg.show ();} Flashing hint public static void Displaytoast (String msg,context context) {Toast.maketext (context, MSG, toast.length_short). Show ();}}

2. Drag in a Button, Button Event association method name

3.mainactivity.java New method name btn_clicked and call the Com.java method

    public void btn_clicked (view view) {        com. ShowMsg ("This is the Cue box", mainactivity.this);        Com. Displaytoast ("This is a flashing hint", getbasecontext ());    }

4. Operation Effect

Android---hellword Simple tips box