Android按钮单击事件的五种实现方式

  1. 匿名内部类作为事件监听器

    public class MainActivity extends Activity {
    	
    	private Button button;
        
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            button = (Button) findViewById(R.id.button1);
            button.setOnClickListener(new OnClickListener() {
    			@Override
    			public void onClick(View v) {
    				System.out.println("匿名内部类作为事件监听器");
    			}
    		});
            
        }
        
    }
    
  2. 内部类作为事件监听器

    public class MainActivity extends Activity {
    	
    	private Button button;
    	
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            button = (Button) findViewById(R.id.button1);
            button.setOnClickListener(new ButtonOnClickListener());
        }
        
        class ButtonOnClickListener implements OnClickListener{
    		@Override
    		public void onClick(View v) {
    			System.out.println("内部类作为事件监听器");
    		}
        }
        
    }
    
  3. Activity本身作为事件监听器

    public class MainActivity extends Activity implements OnClickListener{
    	
    	private Button button;
    	
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            button = (Button) findViewById(R.id.button1);
            button.setOnClickListener(this);
        }
        
        @Override
        public void onClick(View v) {
        	System.out.println("Activity本身作为事件监听器");
        }
        
    }
    
  4. 外部类作为事件监听器

    public class MainActivity extends Activity {
    	
    	private Button button;
    	
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            button = (Button) findViewById(R.id.button1);
            button.setOnClickListener(new ButtonOnClickListener());
        }
        
    }
    class ButtonOnClickListener implements OnClickListener {
    	
    	@Override
    	public void onClick(View v) {
    		System.out.println("外部类作为事件监听器");
    	}
    	
    }
    
  5. 将事件处理方法直接绑定到标签

    <Button
                android:id="@+id/button1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="点击事件"
                android:onClick="onClick" />
    
    public class MainActivity extends Activity {
    	
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
        }
        
        public void onClick(View v){
        	System.out.println("将事件处理方法直接绑定到标签");
        }
        
    }
    

Android按钮单击事件的五种实现方式

全文结束