Learn how to add Setonclicklistener from scratch with Android development-view

1) The first, but also the longest-to-see method of addition (click on the button for example)

Button BTN = (Button) Findviewbyid (R.id.mybutton); btn. Setonclicklistener (new  View.onclicklistener () {         publicvoid//dosomething          }     });

2) Second, the following method is slightly simpler than the previous one, allowing multiple buttons to share a single listener. To control the response to different button click events via the switch:

Button BTN =(Button) Findviewbyid (R.id.mybutton); Button btn2=(Button) Findviewbyid (R.id.mybutton2); Btn.setonclicklistener (handler); Btn2.setonclicklistener (handler); View.onclicklistener Handler=View.onclicklistener () { Public voidOnClick (View v) {Switch(V.getid ()) { CaseR.id.mybutton://Do something                Break;  CaseR.id.mybutton2://Do something                Break; }    }

Or

Button list=NULL; Button About=NULL; /**Called when the activity is first created.*/@Override Public voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Requestwindowfeature (Window.feature_no_title);        Setcontentview (R.layout.main); List=(Button) Findviewbyid (R.ID.FOODLISTBTN); about=(Button) Findviewbyid (R.id.aboutbutton);//list.settext (text);//List.setcompounddrawables (left, top, right, bottom);List.setonclicklistener ( This); About.setonclicklistener ( This); } @Override Public voidOnClick (View v) {//TODO auto-generated Method Stub        if(V.getid () = =r.id.foodlistbtn) {Intent Intent=NewIntent (); Intent.setclass (Mainapp. This, Foodlistview.class);        StartActivity (Intent);        List.setbackgroundresource (r.drawable.btn_food_list_active); }Else if(V.getid () = =R.id.aboutbutton) {Intent Intent=NewIntent ( This, about.class);            StartActivity (Intent);        About.setbackgroundresource (r.drawable.btn_food_about_active); }    }

3) Third, directly clicklistener bundle the views element in the XML layout, the listener method defined in the program requires a parameter with a view type:

<?XML version= "1.0" encoding= "Utf-8"?><LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"android:orientation= "vertical"Android:layout_width= "Fill_parent"Android:layout_height= "Fill_parent">    <TextViewAndroid:layout_width= "Fill_parent"Android:layout_height= "Wrap_content"Android:id= "@+id/text"Android:text= "@string/hello" />    <ButtonAndroid:id= "@+id/mybutton"Android:layout_height= "Wrap_content"Android:layout_width= "Wrap_content"Android:onclick= "Mybuttonlistener"></Button></LinearLayout>

Java code:

Button BTN = (Button) Findviewbyid (R.id.mybutton);    Public void  //dosomething     }

Learn how to add Setonclicklistener from scratch with Android development-view