像上的点击行为按键自定义视图/触摸

问题描述

我创建一个自定义视图，我通常附加一个onClickListener来。我想有这样行为的一些按钮：如果是pressed，应该改变它在的onDraw（）方法来定义它的外观。然而，这code不工作：

I have created a custom View which I usually attach an onClickListener to. I'd like to have some button like behavior: if it is pressed, it should alter its appearance which is defined in the onDraw() method. However, this code does not work:

//In my custom View:

@Override
protected void onDraw(Canvas canvas)
{

    boolean pressed = isPressed();
    //draw depending on the value of pressed
}

//when creating the view:
MyView.setClickable(true);

pressed的值总是假的。怎么了？

pressed always has the value false. What's wrong?

非常感谢！

推荐答案

你有没有考虑只用一个按钮，你想要做什么？你可以使用切换按钮和写XML很短的选择，这将允许您指定图像时pressed或不使用。 this问题可能是对你有所帮助。

have you considered just using a button to do what you want? you could use ToggleButton and write a short selector in xml that will allow you to specify an image to use when pressed or not. this question may be of some help to you.

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