启动界面淡入动画显示类

啥都不要说了，看代码：

/** 
 * 
 */
package com.lurencun.android.util;

import java.util.HashMap;
import java.util.LinkedList;
import java.util.Map;
import java.util.Queue;

import android.os.Handler;
import android.view.animation.AlphaAnimation;
import android.widget.ImageView;

/**
 * @author chenyoca [桥下一粒砂] ([e-mail])
 * @data 2011-12-7
 * @desc 用于启动界面显示渐变动画的类。
 */
public class TweeningAnimation {
    private ImageView splashImgView = null;
    private final static String RESOURCE_ID_KEY = "resource_id";
    private final static String RESOURCE_TIME_KEY = "show_time";
    private final static String RESOURCE_ALAPHA_KEY = "start_alaph";
    private final static long DURATION = 1000;
    private Queue<Map<String,Integer>> resource_list = new LinkedList<Map<String,Integer>>();

    public TweeningAnimation(ImageView view){
        splashImgView = view;
    }

    /**
     * 添加一个动画资源
     * @param resource_id 资源ID
     * @param show_time 显示时间(ms)
     * @param start_alaph 起始透明度(0 - 10)
     */
    public void addAnimation(int resource_id,int show_time,int start_alaph){
        Map<String,Integer> item = new HashMap<String, Integer>();
        item.put(RESOURCE_ALAPHA_KEY, start_alaph);
        item.put(RESOURCE_TIME_KEY, show_time);
        item.put(RESOURCE_ID_KEY, resource_id);
        resource_list.add(item);
    }

    /**
     * 显示动画
     */
    public void showAnimation(){
        int _show_time = 0;
        for(Map<String,Integer> item : resource_list){
            final int _resource_id = item.get(RESOURCE_ID_KEY);
            float alapha = (float) (Math.max(0, Math.min(item.get(RESOURCE_ALAPHA_KEY), 10)) / 10.0);
            _show_time += item.get(RESOURCE_TIME_KEY);
            final AlphaAnimation animation = new AlphaAnimation(alapha, 1.0f);
            animation.setDuration(DURATION);
            new Handler().postDelayed(new Runnable(){
                @Override public void run() {
                    splashImgView.setImageResource(_resource_id);
                    splashImgView.startAnimation(animation);
                }
            },_show_time);
        }
    }
}
 
//例子：
 
package com.lurencun.android.util; 

import android.app.Activity;
import android.os.Bundle;
import android.widget.ImageView;

public class DownloadActivity extends Activity {
    /** Called when the activity is first created. */
    private TweeningAnimation tween;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        ImageView v = (ImageView)findViewById(R.id.splash);
        tween = new TweeningAnimation(v);
        tween.addAnimation(R.drawable.cfuture_logo_320dpi, 2000, 2);
        tween.addAnimation(R.drawable.lurencun_logo_320dpi, 3000, 2);
        tween.addAnimation(R.drawable.splash, 3000, 2);
    }
    @Override
    protected void onStart() {
        super.onStart();
        tween.showAnimation();
    }


}

评论

1 楼 119568242 2011-12-07  

直接可以用了