Android实现闪屏欢迎界面

<?xml version="1.0" encoding="utf-8"?>
<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="com.example.administrator.test.SplashActivity">
  <ImageView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/splash_iv"
    android:scaleType="fitXY"
    android:src="@mipmap/splash"/>

</RelativeLayout>

 new Handler().postDelayed(new Runnable() {
      @Override
      public void run() {
        Intent intent=new Intent(SplashActivity.this,MainActivity.class);
        startActivity(intent);
        SplashActivity.this.finish();
      }
    },3000);

@Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash);
    iv =(ImageView)findViewById(R.id.splash_iv);
    iv.setImageResource(R.mipmap.splash);
    //设置透明度动画从无到有
    AlphaAnimation alphaAnimation=new AlphaAnimation(0.0f,1.0f);
    //设置动画持续时间
    alphaAnimation.setDuration(3000);
    //开始显示动画
    iv.startAnimation(alphaAnimation);
    //给动画设置监听，在动画结束的时候进行跳转
    alphaAnimation.setAnimationListener(new Animation.AnimationListener() {
      @Override
      public void onAnimationStart(Animation animation) {
        //动画开始时执行
        Log.e("TAG", "onAnimationStart: " );
      }

      @Override
      public void onAnimationEnd(Animation animation) {
        //动画结束时执行
        Log.e("TAG", "onAnimationEnd: " );
        Intent intent=new Intent(SplashActivity.this,MainActivity.class);
        startActivity(intent);
        finish();
      }

      @Override
      public void onAnimationRepeat(Animation animation) {
        //动画重复播放时执行
        Log.e("TAG", "onAnimationRepeat: " );
      }
    });
  }

 @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash);
    iv =(ImageView)findViewById(R.id.splash_iv);
    iv.setImageResource(R.mipmap.splash);
    Timer timer=new Timer();
    timer.schedule(new TimerTask() {
      @Override
      public void run() {
        Intent intent=new Intent(SplashActivity.this,MainActivity.class);
        startActivity(intent);
        finish();
      }
    },3000);
  }