Click event
1. Click events in several ways:
> > 1, anonymous inner class
Public class MainActivity extends Activity {
Private Button btn
Private TextView tv_show
@ Override
Protected void onCreate (Bundle savedInstanceState) {
Super.onCreate (savedInstanceState)
SetContentView (R.layout.activity_main)
Btn = (Button) findViewById (R.id.btn)
Tv_show = (TextView) findViewById (R.id.tv_show)
/ / the first anonymous inner class
Btn.setOnClickListener (new OnClickListener () {
@ Override
Public void onClick (View v) {
Tv_show.setText ("OK, I'll be right there!")
}
});
}
}
> > 2, the method implemented by the class
Private void clickTwo () {
Btn.setOnClickListener (this)
}
@ Override
Public void onClick (View v) {
Tv_show.setText ("OK, I'll be right there!")
}
> > 3PowerXML layout onClick
/ * *
* the third method: the first modification uses public, and the second method contains View.
* @ param v
, /
Public void clickThree (View v) {
Tv_show.setText ("attention, everyone: Mr. Cang came to Huayu Class 6 to inspect this afternoon!")
}
> > 4, the fourth method
Public void onClick (View v) {
Switch (v.getId ()) {
Case R.id.btn:
Tv_show.setText ("OK")
Break
Case R.id.btn2:] [
Tv_show.setText ("OK, I'll be right there!")
Break
Case R.id.btn3:
Tv_show.setText ("all right, I'll be right there! see you at Huayu Grove tonight!")
Break
Default:
Break
}
}
