// 从本地存储设备中读取key指定的图片,同时指定缩放后的宽高尺寸
private Bitmap getBitmapFromLocal(String key, int reqWidth, int reqHeight) {
Bitmap bitmap = null;
if (reqWidth != 0 && reqHeight != 0) {
bitmap =
StorageHelper.getBitmapFromLocal(String.valueOf(key.hashCode()), reqWidth, reqHeight);
} else {
bitmap = StorageHelper.getBitmapFromLocal(String.valueOf(key.hashCode()));
}
// 读取到之后，再put到内存中
this.put(key, bitmap);
return bitmap;
}
// 是否存储在本地存储设备中
private boolean isExistsInLocal(String key) {
boolean isExist = true;
String fileName = String.valueOf(key.hashCode()); // 取图片的网络url的hash值作为文件名
File file = new File(StorageHelper.getAppImageDir(), fileName);
if (!file.exists()) {
isExist = false;
}
return isExist;
}
