disable an ImageButton?

问题

I wanted to leave an ImageButton is disabled (not clickable) but have used android: enabled = "false" and does't work.

Does anyone know how to disable an ImageButton?

回答1:

If you want to show the button as disabled (if you have that set up in an xml drawable file) doing both setClickable(false) AND setEnabled(false) will do the trick.

回答2:

You can use the android:clickable attribute on the XML, or the setClickable(boolean) method from your code.

回答3:

When setting a clicklistener for the ImageButton, under the hood android resets the attribute clickable to true. That's why setting android:clickable="false" in xml is not helpful.

In addition, setting the attribute android:enabled="false" in the xml didn't work for me as well.

What did work is only setting via the code:

ImageButton mBtnDelayCall = (ImageButton)v.findViewById(R.id.btnCallDelay);
mBtnDelayCall.setEnabled(false);

回答4:

If you want to disable and "grey out" the image, I use the following (Kotlin):

Disable:

chevron_left.imageAlpha = 75 // 0 being transparent and 255 being opaque
chevron_left.isEnabled = false

Enable:

chevron_left.imageAlpha = 255
chevron_left.isEnabled = true

XML:

<ImageButton
            android:id="@+id/chevron_left"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_marginBottom="4dp"
            android:layout_marginStart="4dp"
            android:background="?android:attr/selectableItemBackgroundBorderless"
            android:src="@drawable/chevron_left"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"/>

Note that the your background color will define the color of the disabled state. Depends on your desired result.

回答5:

ImageButton like ImageView does not have android:enabled="false" attribute, because it is attribute of TextView. If you want make enable = false in XML for ImageButton you have to add android:focusable="false" and android:clickable="false".

来源：https://stackoverflow.com/questions/3118108/disable-an-imagebutton

标签

android

imagebutton