Android (SpreadTurm)无T卡下载文件导致无法释放手机内存

本文链接：https://blog.youkuaiyun.com/silence_cdsn/article/details/8185305

本文讨论了在无外部存储卡（T卡）的情况下，SpreadTurm如何通过增加特定路径前缀匹配过程来优化下载文件的删除逻辑。详细介绍了在删除下载文件时，如何正确处理环境内部存储路径与数据目录路径，确保在没有外部存储卡时，仍然能够有效删除本地存储的文件。特别关注了如何判断文件是否存在于内部存储或数据目录，并在不同情况下采取相应的删除操作策略。

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SpreadTurm在无T卡情况下使用/data/internal_memory路径存储下载文件，在删除文件进行路径匹配时未包含此路径

增加此路径前缀匹配过程.

详细路径:packages\providers\DownloadProvider\ui\src\com\android\providers\downloads\ui\DownloadList.java

红色文字为增加匹配的代码

private void deleteDownload(long downloadId) {
if (moveToDownload(downloadId)) {
int status = mDateSortedCursor.getInt(mStatusColumnId);
boolean isComplete = status == DownloadManager.STATUS_SUCCESSFUL
|| status == DownloadManager.STATUS_FAILED;
String localUri = mDateSortedCursor.getString(mLocalUriColumnId);
if (isComplete && localUri != null) {
String path = Uri.parse(localUri).getPath();
if (path.startsWith(Environment.getExternalStorageDirectory().getPath())
|| path.startsWith(Environment.getDataDirectory().getPath())) {
String mediaProviderUri = mDateSortedCursor.getString(mMediaProviderUriId);
if (TextUtils.isEmpty(mediaProviderUri)) {
// downloads database doesn't have the mediaprovider_uri. It means
// this download occurred before mediaprovider_uri column existed
// in downloads table. Since MediaProvider needs the mediaprovider_uri to
// delete this download, just set the 'deleted' flag to 1 on this row
// in the database. DownloadService, upon seeing this flag set to 1, will
// re-scan the file and get the MediaProviderUri and then delete the file
mDownloadManager.markRowDeleted(downloadId);
return;
} else {
getContentResolver().delete(Uri.parse(mediaProviderUri), null, null);
// sometimes mediaprovider doesn't delete file from sdcard after deleting it
// from its db. delete it now
try {
File file = new File(path);
file.delete();
} catch (Exception e) {
Log.w(LOG_TAG, "file: '" + path + "' couldn't be deleted", e);
}
}
}
}
}
mDownloadManager.remove(downloadId);
}