Android OnClick button Click event Four common wording

XML file

<EditTextAndroid:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:inputtype= "Phone"Android:ems= "Ten"Android:id= "@+id/et_number"Android:layout_alignparenttop= "true"Android:layout_alignparentleft= "true"Android:layout_alignparentstart= "true" />    <ButtonAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "@string/dial_number"Android:id= "@+id/bt_dial"Android:layout_below= "@id/et_number"Android:layout_alignright= "@id/et_number"Android:layout_alignend= "@id/et_number" />

The first, anonymous inner class:

protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);      Setcontentview (R.layout.activity_main);      Button bt_dial = (button) Findviewbyid (r.id.bt_dial);              Bt_dial.setonclicklistener (New View.onclicklistener () {@Override public void OnClick (view view) {          Dialphone ();  }      }); }

The second, custom click event Listener class:

Protected void oncreate (bundle savedinstancestate)  {       Super.oncreate (savedinstancestate);           setcontentview ( R.layout.activity_main);          et_number =  ( EditText)  mainactivity.this.findviewbyid (r.id.et_number);                                  Button bt_dial =  (Button)  findviewbyid (r.id.bt_dial);           bt_dial.setonclicklistener (New MyListener ());       }        private class  mylistener implements view.onclicklistener {       @Override      &Nbsp; public void onclick (View view)  {           dialphone ();      }  }  

Third, activity inherits View.onclicklistener, which is implemented by the activity onclick (View View) method, the button that is represented by a different ID is handled with switch-case in the onclick (view) method:

public class mainactivity extends activity implements view.onclicklistener  {      edittext et_number;       @Override       protected void oncreate (bundle savedinstancestate)  {           super.oncreate (savedinstancestate);           setcontentview (R.layout.activity_main);           et_number =  (EditText)  mainactivity.this.findviewbyid (R.id.et_number);                 Button bt_dial =  (Button)  findviewbyid (r.id.bt_dial);           bt_dial.setonclicklistener (This);         }    &nBsp;   public void onclick (View view)  {             switch  (View.getid ()) {               case R.id.bt_dial:                   dialphone ();                   break;               default:                   break;           }      }  }  

The fourth type displays the OnClick property of the specified button in the XML file, so that when the button is clicked, the Click () method in the corresponding activity is invoked using reflection:

<ButtonAndroid:onclick= "Dialphonemethod"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "@string/dial_number"Android:id= "@+id/bt_dial"Android:layout_below= "@id/et_number"Android:layout_alignright= "@id/et_number"Android:layout_alignend= "@id/et_number" /> 

public void Dialphonemethod (view view) {Dialphone ();        private void Dialphone () {String number = Et_number.gettext (). toString (). Trim ();          if (textutils.isempty) {Toast.maketext (this, "phone number cannot be empty", Toast.length_long). Show ();      Return      } Intent Intent = new Intent ();      Intent.setaction (Intent.action_call);      Intent.setdata (Uri.parse ("Tel:" + number));  StartActivity (Intent); }

　　

Android OnClick button Click event Four common wording