我的Alpha动画文件的布局

Question

First of all Im trying to animate a TextView view in one of my app's but it doesn't seem to work. I believe the answer lies in the alpha.xml file; I keep getting an error from this file but can't determine why:

<?xml version="1.0" encoding="utf-8"?>
<alpha
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromAlpha="0.0"
    android:toAlpha="1.0"
    android:duration="3000">
</alpha>

Also I later want to animate an entire activity before it appears. This screen will simply be the splash/load screen an should animate on over a period of time.

Any ideas? Cheers

The java code which uses it goes like this:

private void RunAnimations() 
        {
        Animation a = AnimationUtils.loadAnimation ( this, R.anim.alpha );
        a.reset();

        TextView tv = (TextView) findViewById( R.id.welcomeMessage );
        tv.clearAnimation();
        tv.startAnimation( a );
    }

The error in the XML file is:

Multiple annotations found at this line: - Element type "alpha" must be followed by either attribute specifications, ">" or "/

". - error: Error parsing XML: not well-formed (invalid token)

:/

Answer 1

我对其进行了整理-由于某种原因，我不得不使用set.xml，然后向其中添加Alpha以使其正常工作