Android(SpreadTurm)无T卡下载文件导致无法释放手机内存
来源:互联网 发布:网络电视无线路由器 编辑:程序博客网 时间:2024/05/16 19:19
【原因】在删除下载记录时没有删除源文件,同时因用户有没有权限查看路径:/data/internal_memory下的文件
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())) {//此处为删除源文件所添加的代码
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);
}
【修改】删除记录时一起把源文件也删除
idh.code\packages\providers\DownloadProvider\ui\src\com\android\providers\downloads\ui\DownloadList.java
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())) {//此处为删除源文件所添加的代码
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);
}
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