在splash页面添加AlphaAnimation透明度渐变动画效果

1、要求：


比方说我想在splash页面添加一个过渡动画，可以使用AlphaAnimation透明度渐变动画效果，复写其中的监听事件可以做到当动画结束时，跳转到指定activity页面，比方说下面就是几行示例代码：


public class SplashActivity extends BaseActivity {
/* 标识 */
protected static final String TAG = "SplashActivity";
private RelativeLayout rl_splash;


@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

//全屏显示欢迎界面
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);

setContentView(R.layout.activity_splash);
rl_splash = (RelativeLayout) findViewById(R.id.rl_splash);

//使用AlphaAnimation动画效果，设置的是透明度度的渐变动画
AlphaAnimation alphaAnimation = new AlphaAnimation(0.2f, 1.0f);
alphaAnimation.setDuration(2000);
rl_splash.startAnimation(alphaAnimation);
alphaAnimation.setAnimationListener(new AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {

}
//动画结束时，进入登陆页面，结束当前页面
@Override
public void onAnimationEnd(Animation animation) {
jumpToLogin();
finish();
}


@Override
public void onAnimationRepeat(Animation animation) {


}


});


}

//进入登陆页面的方法
protected void jumpToLogin() {
Intent intent = new Intent(this,LoginActivity.class);
startActivity(intent);
}
}