单击/聚焦时如何更改按钮的背景图像? [英] how to change background image of button when clicked/focused?

问题描述

我想在单击或聚焦时更改按钮的背景图像.

I want to change the background image of a button when clicked or focused.

这是我的代码:

Button tiny = (Button)findViewById(R.id.tiny);
tiny.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        Button tiny = (Button)findViewById(R.id.tiny);
        tiny.setBackgroundResource(R.drawable.a9p_09_11_00754);

        TextView txt = (TextView)findViewById(R.id.txt);
        txt.setText("!---- On click ----!");
    }
});

这段代码对吗?它是否在其事件上调用按钮?

Is this code right? Does it calls a button on its event?

推荐答案

你可以在一个xml文件中为此实现如下:

you can implement in a xml file for this as follows:

<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_focused="true" android:drawable="@drawable/your_imagename_while_focused"/>
<item android:state_pressed="true" android:drawable="@drawable/your_imagename_while_pressed" />
<item android:drawable="@drawable/image_name_while_notpressed" />  //means normal
</selector>

现在将此xml文件保存在drawable文件夹中，并命名为suppos abc.xml并设置如下

now save this xml file in drawable folder and name it suppos abc.xml and set it as follows

 Button tiny = (Button)findViewById(R.id.tiny);
 tiny.setBackgroundResource(R.drawable.abc);

希望能帮到你.:)

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