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androidxmlandroid-layoutandroid-imageviewalpha

Android and setting alpha for (image) view alpha

Is there really no XML attribute counterpart to setAlpha(int)?

If not, what alternatives are there?

Solution

  • No, there is not, see how the "Related XML Attributes" section is missing in the ImageView.setAlpha(int) documentation. The alternative is to use View.setAlpha(float) whose XML counterpart is android:alpha. It takes a range of 0.0 to 1.0 instead of 0 to 255. Use it e.g. like

    <ImageView android:alpha="0.4">

    However, the latter in available only since API level 11.