Android：启动动画

package com.example.administrator.myapplication;

import android.support.v7.app.appcompatactivity;

import android.os.bundle;

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 appcompatactivity {

imageview welcomeimg= null;

@override

protected void oncreate(bundlesavedinstancestate) {

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(2000);// 设置动画显示时间

welcomeimg.startanimation(anima);

anima.setanimationlistener(new animationimpl());

}

private class animationimplimplements animationlistener

{

@override

public void onanimationstart(animationanimation) {

welcomeimg.setbackgroundresource(r.drawable.welcome);

}

@override

public void onanimationend(animationanimation) {

skip(); //动画结束后跳转到别的页面

}

@override

public void onanimationrepeat(animationanimation) {

}

private voidskip() {

intent intent = new intent();

intent.setclass(mainactivity.this, secondactivity.class);

startactivity(intent);

}

}

}