android歡迎介面

import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.view.Window;import android.view.animation.AlphaAnimation;import android.view.animation.AnimationSet;import android.widget.ImageView;public class WelcomeActivity extends Activity { private final int SPLASH_DISPLAY_LENGHT = 3000; //延遲三秒 @Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);// 去除titlerequestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.welcome);ImageView image=(ImageView)findViewById(R.id.image);        AnimationSet  animationset=new AnimationSet(true);        AlphaAnimation alphaAnimation=new AlphaAnimation(1, 0);        alphaAnimation.setDuration(5500);        animationset.addAnimation(alphaAnimation);        image.startAnimation(animationset);        new Handler().postDelayed(new Runnable(){             @Override             public void run() {             //MainActivity是歡迎介面顯示之後要跳轉的介面                Intent mainIntent = new Intent(WelcomeActivity.this,MainActivity.class);                 WelcomeActivity.this.startActivity(mainIntent);                 WelcomeActivity.this.finish();             }            }, SPLASH_DISPLAY_LENGHT); }}