Question

如何判断button是否已被点击

Answer 1

Button没这种功能，简单的做法是派生一个自己的Button比如
public class MyButton extends Button{
private boolean _pressed = false;

//把三个构造方法都实现了

public MyButton(Context context){

}

public MyButton(Context context, AttributeSet attrs){

}

public MyButton(Context context, AttributeSet attrs, int defStyle){

}

//覆写dispatchTouchEvent方法

@Override

public boolean dispatchTouchEvent(MotionEvent event){

switch(event.getAction()){

case MotionEvent.ACTION_DOWN:

_pressed = true;
break;

case MotionEvent.Action_UP:

_pressed = false;

break;

}
return super.dispatchTouchEvent(event);
}

//提供查询是否按下

public boolean checkPress(){

return _pressed;

}

}