java - setPressed 不起作用

Question

我的代码中有这个，但 .setPressed 不起作用:

Button btndesligado = (Button) findViewById(R.id.button12);
 btndesligado.setOnClickListener(new OnClickListener() { //Botão para pôr silêncio!

    @Override
    public void onClick(View v) {

        btndesligado.setPressed(true);
        som = false;
        vibrar = false;

    }
 });

出了什么问题？它不会给我任何错误，只是当我打开它并单击它时它不起作用。本来按一次就按了。

Answer 1

Android 会在 onClickEvent 之前和之后更改 setPressed

所以改变你的代码这个代码

btndesligado.setOnClickListener(new OnClickListener() { //Botão para pôr silêncio!

    @Override
    public void onClick(View v) {

        btndesligado.setPressed(true);
        som = false;
        vibrar = false;

    }
 });

到此

 btndesligado.setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {

            // show interest in events resulting from ACTION_DOWN
            if (event.getAction() == MotionEvent.ACTION_DOWN) return true;

            // don't handle event unless its ACTION_UP so "doSomething()" only runs once.
            if (event.getAction() != MotionEvent.ACTION_UP) return false;


            btndesligado.setPressed(true);    
            som = false;
            vibrar = false;                
            return true;
       }
    });