在Android的ImageView的切换按钮 [英] ImageView Button Toggle in Android

问题描述

我试图使一个ImageView的按钮切换，当我点击它。我有以下code：

I'm trying to make an ImageView button toggle when I click on it. I've got the below code:

    ImageView button01 = (ImageView) findViewById(R.id.button01);
    button01.setOnClickListener(new OnClickListener() {
        int button01pos = 0;
        public void onClick(View v) {
            if (button01pos == 0) {
                button01.setImageResource(R.drawable.image01);
                button01pos = 1;
            } else if (button01pos == 1) {
                button01.setImageResource(R.drawable.image02);
                button01pos = 0;
            }
        }
    });

但由于某些原因button01是强调了红色Eclipse和它给人的错误：

But for some reason button01 is underlined in red in Eclipse and it gives the error:

不能引用非最终变量button01一个内部类中
  在不同的方法定义

Cannot refer to a non-final variable button01 inside an inner class defined in a different method

有谁知道它为什么这样做，以及如何解决它？

Does anyone know why it's doing this and how to fix it?

感谢

推荐答案

下面是工作code：

final ImageView button01 = (ImageView) findViewById(R.id.button01);
button01.setOnClickListener(new OnClickListener() {
    int button01pos = 0;
    public void onClick(View v) {
        if (button01pos == 0) {
            button01.setImageResource(R.drawable.image01);
            button01pos = 1;
        } else if (button01pos == 1) {
            button01.setImageResource(R.drawable.image02);
            button01pos = 0;
        }
    }
});

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