Android development-onclicklistener

Private button abtn = NULL; // declare initialization in the class

1. Click the common button to add a new listener for each control. It is convenient and convenient to use the keyword new.

aBtn = (Button) findViewById(R.id.aBtn);aBtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stub}});

2. Implement an independent click listener class and may be used multiple times

aBtn = (Button) findViewById(R.id.aBtn);aBtn.setOnClickListener(new MyListener(){});public class MyListener implements OnClickListener{public void onClick(View arg0) {//TODO}}

Or only new once, used multiple times; for example, the refresh efficiency can be significantly improved when used in listitem

aBtn = (Button) findViewById(R.id.aBtn);aBtn.setOnClickListener(mListener);OnClickListener mListener = new OnClickListener() {@Overridepublic void onClick(View v) {//TODO}};

3. The interface can be implemented when many components on the Interface need to execute click events.

For example, the implements onclicklistener interface of the activity class

Oncreate ()

1. Findviewbyid (R. Id. abtn). setonclicklistener (this );
2. Findviewbyid (R. Id. backbtn). setonclicklistener (this );
   

The onclick method needs to be reloaded in the class, and click response is implemented by judging the ID here:

1. @ Override
2. Public void onclick (view v ){
3. // Todo auto-generated method stub
4. Switch (V. GETID ()){
5. Case R. Id. abtn:
6. Break;
7. Case R. Id. backbtn:
8. Finish ();
9. Break;
10. }
11. }