ImageButton in Android with transparent background

问题

I have follow this post to make ImageButton in android

android image button

The image appears to the button but it has some background , my Image is a png image and I want the button to be transparent background

any one help please

回答1:

add this line to your ImageButton xml layout.

android:background="@null"

回答2:

Here's an alternative solution that worked for me:

android:background="@android:color/transparent"

As Sunny said, add it to the ImageButtons' XML layout

回答3:

In your code use this:

ImageButton btn = new ImageButton(this);
btn.setImageResource(R.drawable.btn_close);
btn.setBackgroundResource(0);

回答4:

I don't know if there is any method to do that, but you can paint completely transparent .png file and use method setBackGroundResource() or in XML using this : android:background

回答5:

By this way you can set transparent background to ImageButton:

<ImageButton android:id="@+id/imagebutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/<imageresourcename>"
android:background="@null"></ImageButton>

来源：https://stackoverflow.com/questions/9195963/imagebutton-in-android-with-transparent-background