Android Event Encyclopedia

1 Onclicklistener (Click event)
Component. Setonclicklistener (new Onclicklistener () {
public void OnClick (View v) {
String str = Et.gettext (). toString ();
Tv.settext (str);
}
});

2 Oncheckedchangelistener (single selection changes)
Rg.setoncheckedchangelistener (New Oncheckedchangelistener () {
public void OnCheckedChanged (
Radiogroup Group, int checkedid) {
RadioButton RB = (RadioButton)
Findviewbyid (Checkedid);
String str = Rb.gettext (). toString ();
Tv.settext (str);
}
});

3 Onitemselectedlistener (drop-down list)
Sp.setonitemselectedlistener (New Onitemselectedlistener () {
public void onitemselected (adapterview<?> arg0, view view,
int arg2, long arg3) {
TextView TV1 = (TextView) view;
String str = Tv1.gettext (). toString ();
Tv.settext (str);
}

public void onnothingselected (adapterview<?> arg0) {
}
});

4 Ontimechangedlistener Time Event monitoring

5 Onfocuschangelistener Focus Event
Et.setonfocuschangelistener (New Onfocuschangelistener () {
public void Onfocuschange (View V, Boolean hasfocus) {
if (Hasfocus) {
Et.settext ("");
}else{
String str= Et.gettext (). toString ();
Tv.settext (str);
}
}
});

6 Ondatechangelistener
Dp.init (4, Ondatechangedlistener, new) {
public void ondatechanged (DatePicker view, int year, int monthofyear,
int DayOfMonth) {
Tv.settext (year+ "-" +monthofyear+ "-" +dayofmonth ");
}
});

7 Onlongchangelistener (Long press event)
<!--settings to modify desktop background permissions--
<uses-permission android:name= "Android.permission.SET_WALLPAPER"/>
Iv.setonlongclicklistener (New Onlongclicklistener () {
public boolean Onlongclick (View v) {
try {
Day07.this.clearWallpaper ();
Getresources ();//Get Resource Object
InputStream data = Getresources (). Openrawresource (R.DRAWABLE.A);
Day07.this.setWallpaper (data);
} catch (IOException e) {
E.printstacktrace ();
}
return false;
}
});

Android Event Encyclopedia