我想将本地图片加载到GridView中。
我的适配器中的代码是
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) {
// if it's not recycled, initialize some attributes
imageView = new ImageView(context);
//imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
imageView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
Bitmap btmp = BitmapFactory.decodeFile(images.get(position).getAbsolutePath());
BitmapImage img = new BitmapImage(btmp);
btmp = ThumbnailUtils.extractThumbnail(btmp, 128,128);
imageView.setImageBitmap(btmp);
return imageView;
}
现在我的问题是加载我的应用需要很长时间(几秒钟)。滚动也非常麻烦。
有没有快速的方法来创建我的照片概览的缩略图?
或者是否有网格单元并行加载的方式? 或者只显示一张空白图片并在加载缩略图后替换它?
答案 0 :(得分:0)
使用毕加索图书馆 http://square.github.io/picasso/
Picasso.with(上下文)
.load(R.drawable.your_image)
.placeholder(R.drawable.icon_waitong)
.error(R.drawable.icon_error)
.into(ImageView的);