单击事件的处理方式及登记窗体的创建之（一）按钮单击事件的实现

 1 public class LoginActivity extends AppCompatActivity { 2  3     private Button btnLogin;            //声明交互类组件对象 4      5     @Override 6     protected void onCreate(Bundle savedInstanceState) { 7         super.onCreate(savedInstanceState); 8         setContentView(R.layout.activity_login); 9         10         this.btnLogin = (Button) this.findViewById(R.id.btnLogin);  //实例化交互类组件对象findViewById（ID资源名称）11         12         this.btnLogin.setOnClickListener(new ViewOcl());  //按钮与自定义监听器绑定13 14     }15 private  class ViewOcl implements View.OnClickListener{    //自定义一个事件监听类完成对该界面所有交互组件的动作监听，该类必须实现一个接口View.OnclickListener，进行事件组件监听16         @Override17         public void onClick (View v){18             switch (v.getId()){19                 case R.id.btnLogin:20                     Toast.makeText(getApplicationContext(),"您点击了登录按钮"，Toast.LENGTH_LONG).show();21                     break;22                 case R.id.btnRegister:23                     break;24                 default:break;25             }26         }27     }28 }