Android软件启动动画及动画结束后跳转的实现方法

本文实例讲述了android软件启动动画及动画结束后跳转的实现方法。分享给大家供大家参考，具体如下：

自己写了个小程序，软件启动时，先显示几张图片，每3秒显示一张，图片显示完跳转到首页

1. 图片轮播使用gallery，用法很简单

galleryadapter adapter = new galleryadapter(this, mids);
mgallery.setadapter(adapter);

galleryadapter是自定义适配器

public class galleryadapter extends baseadapter {
  private context mcontext;
  private int mimageheight;
  private int[] mids;
  public galleryadapter(context context, int[] ids) {
   this.mcontext = context;
   this.mids = ids;
   init();
  }
  private void init() {
   mimageheight = px2dip(mcontext, getscreenheight(mainactivity.this));
  }
  @override
  public int getcount() {
   return mids.length;
  }
  @override
  public object getitem(int position) {
   return position;
  }
  @override
  public long getitemid(int position) {
   return position;
  }
  @override
  public view getview(int position, view convertview, viewgroup parent) {
   final imageview imageview = new imageview(mcontext);
   if (position < mids.length) {
    int imageid = mids[position];
    imageview.setscaletype(imageview.scaletype.center_crop);//设置图片居中
    imageview.setlayoutparams(new gallery.layoutparams(
      gallery.layoutparams.fill_parent, mimageheight));
    bitmap bitmap = readbitmap(mcontext, imageid);//用节省内存的方式加载图片，防止oom
    imageview.setimagebitmap(bitmap);
    overridependingtransition(r.anim.push_in, r.anim.push_out);//图片切换动画
   }
   return imageview;
  }
}

2. 设置图片切换时间使用timer定时器

timer timer = new timer();
timer.schedule(task, 3000, 3000);// 每3秒切换一张图片
private timertask task = new timertask() {
  @override
  public void run() {
   message message = new message();
   message.what = 0;
   index = mgallery.getselecteditemposition();
   handler.sendmessage(message);
   index++;
   if (index == mids.length - 1) {
    this.cancel();
    mainactivity.this.finish();
    intent intent = new intent(mainactivity.this, test.class);
    startactivity(intent);
   }
  }
};
//不能直接在task中更新ui，所以用handler向主线程发送消息
private handler handler = new handler() {
  @override
  public void handlemessage(message msg) {
   super.handlemessage(msg);
   switch (msg.what) {
   case 0:
    mgallery.setselection(index);
    break;
   default:
    break;
   }
  }
};

3. 读取本地资源图片

public static bitmap readbitmap(context context, int resid) {
  bitmapfactory.options opt = new bitmapfactory.options();
  opt.inpreferredconfig = bitmap.config.rgb_565;
  opt.inpurgeable = true;
  opt.ininputshareable = true;
  // 获取资源图片
  inputstream is = context.getresources().openrawresource(resid);
  return bitmapfactory.decodestream(is, null, opt);
}

完整实例代码代码点击此处。

希望本文所述对大家android程序设计有所帮助。