WelcomeActivity.java

package com.example.qingyangdemo;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.widget.FrameLayout;

import com.example.qingyangdemo.base.AppManager;
import com.example.qingyangdemo.base.BaseActivity;
import com.example.qingyangdemo.base.BaseApplication;
import com.example.qingyangdemo.ui.IpSetDialog;

/**
 * 欢迎页
 * 
 * @author 赵庆洋
 * 
 */
public class WelcomeActivity extends BaseActivity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		final View view = View.inflate(this, R.layout.welcome_actvivity, null);
		setContentView(view);

		FrameLayout frameLayout = (FrameLayout) findViewById(R.id.welcome_frame);

		BaseApplication application = (BaseApplication) getApplication();

		if (application.isTablet()) {
			frameLayout
					.setBackgroundResource(R.drawable.wecome_tablet_background);
		} else {
			frameLayout.setBackgroundResource(R.drawable.wecome_background);
		}

		// 渐变启动 从x透明度到x透明度渐变启动
		AlphaAnimation alphaAnimation = new AlphaAnimation(0.1f, 1.0f);
		// 持续时间
		alphaAnimation.setDuration(2000);

		alphaAnimation.setAnimationListener(new MyAnimationListener());

		view.setAnimation(alphaAnimation);

	}

	private class MyAnimationListener implements AnimationListener {

		@Override
		public void onAnimationEnd(Animation animation) {
			String ipAdress = application.getIpAdress();

			if (ipAdress.equals("0.0.0.0")) {

				Intent intent = new Intent(WelcomeActivity.this,
						IpSetDialog.class);

				intent.putExtra(IpSetDialog.IS_STRAT_MAIN, true);

				startActivity(intent);
			} else {
				startActivity(MainActivity.class);
			}
			AppManager.getAppManager().finishActivity(WelcomeActivity.this);
		}

		@Override
		public void onAnimationRepeat(Animation animation) {
			// TODO Auto-generated method stub

		}

		@Override
		public void onAnimationStart(Animation animation) {
			// TODO Auto-generated method stub

		}

	}

}