android 设置图片渐变 安卓渐变亮屏

1

package com.oschina.osmf;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;

public class SplashActivity extends Activity{

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		final View view = View.inflate(this, R.layout.splash, null);
		setContentView(view);
        
		//渐变展示启动屏
		AlphaAnimation aa = new AlphaAnimation(0.3f,1.0f);
		aa.setDuration(2000);
		view.startAnimation(aa);
		aa.setAnimationListener(new AnimationListener()
		{
			@Override
			public void onAnimationEnd(Animation arg0) {
//				redirectTo();
				Log.i("log", "触发了事件");
			}
			@Override
			public void onAnimationRepeat(Animation animation) {}
			@Override
			public void onAnimationStart(Animation animation) {}
			
		});
	}
	
    /**
     * 跳转到主程序的代码
     */
    private void redirectTo(){        
//        Intent intent = new Intent(this, Main.class);
//        startActivity(intent);
        finish();
    }
	
}

2

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" 
    android:background="@drawable/welcome">
</LinearLayout>

3 效果

变化结束后触发了日志事件