com.bumptech.glide.signature

Class MediaStoreSignature

java.lang.Object

com.bumptech.glide.signature.MediaStoreSignature

All Implemented Interfaces:

Key

public class MediaStoreSignature
extends java.lang.Object
implements Key

A unique signature based on metadata data from the media store that detects common changes to media store files like edits, rotations, and temporary file replacement.

Field Summary

Fields inherited from interface com.bumptech.glide.load.Key

CHARSET, STRING_CHARSET_NAME

Constructor Summary

Constructors

Constructor and Description
MediaStoreSignature(java.lang.String mimeType, long dateModified, int orientation) Constructor for MediaStoreSignature.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o) For caching to work correctly, implementations must implement this method and Key.hashCode().
int	hashCode() For caching to work correctly, implementations must implement this method and Key.equals(Object).
void	updateDiskCacheKey(java.security.MessageDigest messageDigest) Adds all uniquely identifying information to the given digest.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MediaStoreSignature

public MediaStoreSignature(@Nullable
                           java.lang.String mimeType,
                           long dateModified,
                           int orientation)

Constructor for MediaStoreSignature.

Parameters:

mimeType - The mime type of the media store media. Ok to default to empty string "". See MediaStore.MediaColumns.MIME_TYPE or MediaStore.MediaColumns.MIME_TYPE.

dateModified - The date modified time of the media store media. Ok to default to 0. See MediaStore.MediaColumns.DATE_MODIFIED or MediaStore.MediaColumns.DATE_MODIFIED.

orientation - The orientation of the media store media. Ok to default to 0. See MediaStore.Images.ImageColumns.ORIENTATION.

Method Detail

equals

public boolean equals(java.lang.Object o)

Description copied from interface: Key

For caching to work correctly, implementations must implement this method and Key.hashCode().

Specified by:

equals in interface Key

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Description copied from interface: Key

For caching to work correctly, implementations must implement this method and Key.equals(Object).

Specified by:

hashCode in interface Key

Overrides:

hashCode in class java.lang.Object

updateDiskCacheKey

public void updateDiskCacheKey(@NonNull
                               java.security.MessageDigest messageDigest)

Description copied from interface: Key

Adds all uniquely identifying information to the given digest.

Note - Using MessageDigest.reset() inside of this method will result in undefined behavior.

Specified by:

updateDiskCacheKey in interface Key