Android程序启动程序与页面的跳转

package login;

import com.example.login.R;

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 splash extends Activity {
    private ImageView welcomeImg = null;  

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.splash);
        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, LoginActivity.class));
        finish();
    }
}  

注意在配置文件中增加activity

跳转页面

Intent NewAct = new Intent(SourceAct.this,TargetAct.class);
startActivity(NewAct);
SourceAct.this.finish();