<Java>按钮监听事件的实现方式

public class MainActivity extends Activity implements OnClickListener{  
  
    private Button loginButton;  
    private ImageButton imagBt;  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
        loginButton = (Button)findViewById(R.id.button1);  
        imagBt= (ImageButton) findViewById(R.id.imageButton1);  
        /*loginButton.setOnClickListener(new OnClickListener() {//第一种 
             
            @Override 
            public void onClick(View v) { 
                System.out.println("我的Button被点了"); 
                 
            } 
        });*/  
        loginButton.setOnClickListener(new MyOnClickListener(){//第二种  
            @Override  
            public void onClick(View v) {  
                // TODO Auto-generated method stub  
                super.onClick(v);  
                Toast.makeText(MainActivity.this, "loginButton要执行的罗辑", 1).show();  
            }  
        });  
        imagBt.setOnClickListener(this);  
    }  
    @Override  
    public void onClick(View v) {//第三种  
        Log.i("tag", "第三种方式实现");  
    }  
}  
  
class MyOnClickListener implements OnClickListener  
{  
  
    @Override  
    public void onClick(View v) {  
        v.setAlpha(0.5f);  
    }  
      
}