具有选定状态的 Android ImageButton? [英] Android ImageButton with a selected state?

问题描述

如果我使用带有背景选择器的 ImageButton，是否有我可以更改的状态来改变它的外观?现在我可以让它在按下时更改图像，但似乎没有突出显示"或选择"或类似状态可以让我随意切换其外观.

If I was using an ImageButton with a selector for its background, is there a state I can change which will make it change its appearance? Right now I can get it to change images when pressed, but there seems to be no "highlighted" or "selected" or similar state which lets me toggle its appearance at will.

这是我的 XML；它只会在按下时改变外观.

Here's my XML; it only changes appearance when pressed.

 <selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_focused="true" android:state_pressed="false" android:drawable="@drawable/map_toolbar_details_selected" />
<item android:state_focused="true" android:state_pressed="true" android:drawable="@drawable/map_toolbar_details_selected" />
<item android:state_focused="false" android:state_pressed="true" android:drawable="@drawable/map_toolbar_details_selected" />
<item android:drawable="@drawable/map_toolbar_details" />

推荐答案

这对我有用:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- NOTE: order is important (the first matching state(s) is what is rendered) -->
    <item 
        android:state_selected="true" 
        android:drawable="@drawable/info_icon_solid_with_shadow" />
    <item 
        android:drawable="@drawable/info_icon_outline_with_shadow" />
 </selector>

然后在java中:

//assign the image in code (or you can do this in your layout xml with the src attribute)
imageButton.setImageDrawable(getBaseContext().getResources().getDrawable(R.drawable....));

//set the click listener
imageButton.setOnClickListener(new OnClickListener() {

    public void onClick(View button) {
        //Set the button's appearance
        button.setSelected(!button.isSelected());

        if (button.isSelected()) {
            //Handle selected state change
        } else {
            //Handle de-select state change
        }

    }

});

为了平滑过渡，您还可以提及动画时间:

For smooth transition you can also mention animation time:

<selector xmlns:android="http://schemas.android.com/apk/res/android" android:exitFadeDuration="@android:integer/config_mediumAnimTime">

这篇关于具有选定状态的 Android ImageButton?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！