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
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GalleryAdapter adapter = new GalleryAdapter(this, mIds);mGallery.setAdapter(adapter); |
GalleryAdapter是自定义适配器
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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
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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
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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本站下载。
希望本文所述对大家Android程序设计有所帮助。
