如何显示已按下ImageButton？

Question

How to show that ImageButton is pressed if i add image to it like this:

        Drawable testPic = getResources().getDrawable(R.drawable.test_pic);

        button.setImageDrawable( testPic ); 

And make transparent background so that there would be just image:

button.setBackgroundColor(Color.TRANSPARENT); 

So when i press image button i don't see that it is pressed. I want that image would be highlighted or something when it is pressed.

Also every my button is created dynamically by code and i don't know what image would be and how many button there are.

So any ideas ?

Thanks.

Answer 1

you should use a selector for choosing all the different appearances of a UI element, including an ImageButton .

first comes the state_Pressed=true which means what does it look like when pressed. after that comes the regular which is the normal state of the button.

Answer 2

我认为您应该使用状态列表 ...

Answer 3

You have to change Image at run time. You can achieve these with the help of xml file.

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

Copy this xml to your drawable folder