CreateDirectoryFragment.java 文件源码

@Override
    protected DocumentInfo doInBackground(Void... params) {
        final ContentResolver resolver = mActivity.getContentResolver();
        ContentProviderClient client = null;
        try {
client = DocumentsApplication.acquireUnstableProviderOrThrow(resolver, mCwd.derivedUri.getAuthority());
            final Uri childUri = DocumentsContract.createDocument(
                    resolver, mCwd.derivedUri, Document.MIME_TYPE_DIR, mDisplayName);
            return DocumentInfo.fromUri(resolver, childUri);
        } catch (Exception e) {
            Log.w(TAG, "Failed to create directory", e);
            CrashReportingManager.logException(e);
            return null;
        } finally {
            ContentProviderClientCompat.releaseQuietly(client);
        }
    }