具有选定状态的Android ImageButton？

Question

如果我使用带有选择器的 ImageButton 作为其背景，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”或类似状态让我随意切换它的外观。

这是我的 XML；它只会在按下时改变外观。

 <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" />

Answer 1

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:

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