AlphaAnimation does not work

Question

I have been looking for a solution to my problem. But my code seems to be ok.

I\'ll try to explain: I have a TextView with android:alpha=\"0\" in my layout definiti

Answer 1

actually, android have TWO alpha property for a view

    /**
     * The opacity of the View. This is a value from 0 to 1, where 0 means
     * completely transparent and 1 means completely opaque.
     */
    @ViewDebug.ExportedProperty
    float mAlpha = 1f;

    /**
     * The opacity of the view as manipulated by the Fade transition. This is a hidden
     * property only used by transitions, which is composited with the other alpha
     * values to calculate the final visual alpha value.
     */
    float mTransitionAlpha = 1f;


/**
 * Calculates the visual alpha of this view, which is a combination of the actual
 * alpha value and the transitionAlpha value (if set).
 */
private float getFinalAlpha() {
    if (mTransformationInfo != null) {
        return mTransformationInfo.mAlpha * mTransformationInfo.mTransitionAlpha;
    }
    return 1;
}

the view final alpha is the product of the TWO alpha

View#setAlpha(float) & View#animate() & android:alpha -> mAlpha

AlphaAnimation -> mTransitionAlpha