2.1 BitmapFactory 工厂类 Bitmap 的构造方法是非公开的,创建 Bitmap 只能通过 BitmapFactory 或 Bitmap 的静态方法创建,即使 ImageDecoder 内部也是通过 BitmapFactory 创建 Bitmap 的。 BitmapFactory 工厂类提供了从不同数据源加载图片的能力,例如资源图片、本地图片、内存中的 byte 数组等。不管怎么样,最终还...
这里绘制一个简单的调用时序图方便缕清逻辑: 在Android里,android5-8 和 android8 以上的 Bitmap 内存分配策略是不同的,但是通过源码对比,虽然代码有了比较大的改动,但是调用流程和内存大小的计算方式是基本没有什么大的变化。 解码配置-每像素字节 在Bitmap里面,我们可以通过 getByteCount 方法来得到图片内存大小的...
fresco:failureImage="@drawable/error" //下载失败显示的图片 fresco:failureImageScaleType="centerInside" //失败图的缩放类型 fresco:retryImage="@drawable/retrying" //图片加载失败时显示,提示用户点击重新加载,重复加载4次还是没有加载出来的时候才会显示failureImage的图片 fresco:retryImageScaleType="centerCrop" ...
}// //如果bitmap為空// File cacheFile = ImageLoader.getActualLoader().getFileFromDiskCache(finalUrl);// if(cacheFile ==null){// onFailure(dataSource);// return;// }// //還要判斷文件是不是gif格式的// if (!"gif".equalsIgnoreCase(MyUtil.getRealType(cacheFile))){// onFailure(dataSou...
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/* // 扩展参数 关于缓存的信息在 :ImageLoader类中 private final static String DISK_CACHE_DIR_NAME = "xUtils_img"; //SD卡的缓存名 private final static Executor EXECUTOR = new PriorityExecutor(10, false);//默认线程数 private final static int MEM_CACHE_MIN_SIZE = 1024 * 1024 * 4; //...
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(new Callback() { @Override public void onFailure(Request request, IOException e) { // handle failure } @Override public void onResponse(Response response) throws IOException { File outputFile = new File(getCacheDir(), "tmp.jpg"); response.body().source().readAll(Okio.sink(outputFile));...
Returns 1 on success and 0 on * failure. */ static int bitmap_bsearch_triplet_by_pos(uint32_t commit_pos, struct bitmap_index *bitmap_git, struct bitmap_lookup_table_triplet *triplet) { unsigned char *p = bsearch(&commit_pos, bitmap_git->table_lookup, bitmap_git->entry_count, ...