Android 启动程序时动画效果
1、当你打开一个应用程序时，总会看到前面有一个加载动画页面，下面我们就看看怎么来实现
2、新建一个.xml 文件，添加一个ImageView 组件，该组件用来加载图片
package com.example.activity;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.animation.AlphaAnimation;import android.view.animation.Animation;import android.view.animation.Animation.AnimationListener;import android.widget.ImageView;public class MainActivity extends Activity { private ImageView welcomeImg = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); welcomeImg = (ImageView) this.findViewById(R.id.welcome_img); AlphaAnimation anima = new AlphaAnimation(0.3f, 1.0f); anima.setDuration(3000);// 设置动画显示时间 welcomeImg.startAnimation(anima); anima.setAnimationListener(new AnimationImpl()); } private class AnimationImpl implements AnimationListener { @Override public void onAnimationStart(Animation animation) { welcomeImg.setBackgroundResource(R.drawable.welcome); } @Override public void onAnimationEnd(Animation animation) { skip(); // 动画结束后跳转到别的页面 } @Override public void onAnimationRepeat(Animation animation) { } } private void skip() { startActivity(new Intent(this, OtherActivity.class)); finish(); }}