动画瞎写

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".StartActivity"
android:id="@+id/rel_start_bg">

</RelativeLayout>

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

<scale
android:fromXScale="1.0"
android:fromYScale="1.0"
android:interpolator="@android:anim/decelerate_interpolator"
android:pivotX="50.0%"
android:pivotY="50.0%"
android:toXScale="1.1"
android:toYScale="1.1"/>

<alpha
android:fromAlpha="0.0"
android:toAlpha="1.0" />
/>

</set>

private  RelativeLayout rel_start_bg;
private Animation mFadeInScale;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final View view= View.inflate(this, R.layout.activity_start, null);
setContentView(view);
initAnim();
rel_start_bg=(RelativeLayout)findViewById(R.id.rel_start_bg);
rel_start_bg.setBackgroundResource(R.drawble.bg_start);
rel_start_bg.startAnimation(mFadeInScale);
setListener();

}
private void initAnim() {
mFadeInScale = AnimationUtils.loadAnimation(this,
R.anim.guide_welcome_fade_in_scale);
mFadeInScale.setFillAfter(true);
}
private void setListener() {

mFadeInScale.setAnimationListener(new Animation.AnimationListener() {
public void onAnimationStart(Animation animation) {
}

public void onAnimationRepeat(Animation animation) {
}

public void onAnimationEnd(Animation animation) {
//此处可跳入首页
}
});
}