android.provider.DocumentsContract#buildChildDocumentsUriUsingTree ( )源码实例Demo

下面列出了android.provider.DocumentsContract#buildChildDocumentsUriUsingTree ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： edslite 文件： DocumentTreeFS.java

private void listChildren(ResultReceiver res, Uri uri, String... columns)
{
    final ContentResolver resolver = _context.getContentResolver();
    final Uri childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(uri,
            DocumentsContract.getDocumentId(uri));
    Cursor c = null;
    try
    {
        c = resolver.query(childrenUri, columns, null, null, null);
        if (c != null)
            while (c.moveToNext())
            {
                if (!res.nextResult(c))
                    break;
            }
    }
    catch (Exception e)
    {
        if(GlobalConfig.isDebug())
            Logger.log(e);
    }
    finally
    {
        closeQuietly(c);
    }
}

源代码2 项目： FireFiles 文件： DocumentsContractApi21.java

public static Uri[] listFiles(Context context, Uri self) {
    final ContentResolver resolver = context.getContentResolver();
    final Uri childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(self,
            DocumentsContract.getDocumentId(self));
    final ArrayList<Uri> results = new ArrayList<Uri>();

    Cursor c = null;
    try {
        c = resolver.query(childrenUri, new String[] {
                DocumentsContract.Document.COLUMN_DOCUMENT_ID }, null, null, null);
        while (c.moveToNext()) {
            final String documentId = c.getString(0);
            final Uri documentUri = DocumentsContract.buildDocumentUriUsingTree(self,
                    documentId);
            results.add(documentUri);
        }
    } catch (Exception e) {
        Log.w(TAG, "Failed query: " + e);
    } finally {
        closeQuietly(c);
    }

    return results.toArray(new Uri[results.size()]);
}

源代码3 项目： FireFiles 文件： DocumentsContractApi21.java

public static Uri[] listFiles(Context context, Uri self) {
    final ContentResolver resolver = context.getContentResolver();
    final Uri childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(self,
            DocumentsContract.getDocumentId(self));
    final ArrayList<Uri> results = new ArrayList<Uri>();

    Cursor c = null;
    try {
        c = resolver.query(childrenUri, new String[] {
                DocumentsContract.Document.COLUMN_DOCUMENT_ID }, null, null, null);
        while (c.moveToNext()) {
            final String documentId = c.getString(0);
            final Uri documentUri = DocumentsContract.buildDocumentUriUsingTree(self,
                    documentId);
            results.add(documentUri);
        }
    } catch (Exception e) {
        Log.w(TAG, "Failed query: " + e);
    } finally {
        closeQuietly(c);
    }

    return results.toArray(new Uri[results.size()]);
}

源代码4 项目： FireFiles 文件： DocumentsContractApi21.java

public static Uri[] listFiles(Context context, Uri self) {
    final ContentResolver resolver = context.getContentResolver();
    final Uri childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(self,
            DocumentsContract.getDocumentId(self));
    final ArrayList<Uri> results = new ArrayList<Uri>();

    Cursor c = null;
    try {
        c = resolver.query(childrenUri, new String[] {
                DocumentsContract.Document.COLUMN_DOCUMENT_ID }, null, null, null);
        while (c.moveToNext()) {
            final String documentId = c.getString(0);
            final Uri documentUri = DocumentsContract.buildDocumentUriUsingTree(self,
                    documentId);
            results.add(documentUri);
        }
    } catch (Exception e) {
        Log.w(TAG, "Failed query: " + e);
    } finally {
        closeQuietly(c);
    }

    return results.toArray(new Uri[results.size()]);
}

源代码5 项目： UniFile 文件： DocumentsContractApi21.java

public static Uri[] listFiles(Context context, Uri self) {
    final ContentResolver resolver = context.getContentResolver();
    final Uri childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(self,
            DocumentsContract.getDocumentId(self));
    final ArrayList<Uri> results = new ArrayList<>();

    Cursor c = null;
    try {
        c = resolver.query(childrenUri, new String[] {
                DocumentsContract.Document.COLUMN_DOCUMENT_ID }, null, null, null);
        if (null != c) {
            while (c.moveToNext()) {
                final String documentId = c.getString(0);
                final Uri documentUri = DocumentsContract.buildDocumentUriUsingTree(self,
                        documentId);
                results.add(documentUri);
            }
        }
    } catch (Exception e) {
        // Log.w(TAG, "Failed query: " + e);
    } finally {
        closeQuietly(c);
    }

    return results.toArray(new Uri[results.size()]);
}

源代码6 项目： Dashchan 文件： IOUtils.java

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private static Uri findChildDocument(ContentResolver contentResolver, Uri uri, String displayName) {
	String[] projection = {DocumentsContract.Document.COLUMN_DOCUMENT_ID,
			DocumentsContract.Document.COLUMN_DISPLAY_NAME};
	Uri childUri = DocumentsContract.buildChildDocumentsUriUsingTree(uri,
			DocumentsContract.getDocumentId(uri));
	Cursor cursor = contentResolver.query(childUri, projection, null, null, null);
	try {
		while (cursor.moveToNext()) {
			if (displayName.equals(cursor.getString(1))) {
				return DocumentsContract.buildDocumentUriUsingTree(uri, cursor.getString(0));
			}
		}
	} finally {
		cursor.close();
	}
	return null;
}

源代码7 项目： adt-leanback-support 文件： DocumentsContractApi21.java

public static Uri[] listFiles(Context context, Uri self) {
    final ContentResolver resolver = context.getContentResolver();
    final Uri childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(self,
            DocumentsContract.getDocumentId(self));
    final ArrayList<Uri> results = new ArrayList<Uri>();

    Cursor c = null;
    try {
        c = resolver.query(childrenUri, new String[] {
                DocumentsContract.Document.COLUMN_DOCUMENT_ID }, null, null, null);
        while (c.moveToNext()) {
            final String documentId = c.getString(0);
            final Uri documentUri = DocumentsContract.buildDocumentUriUsingTree(self,
                    documentId);
            results.add(documentUri);
        }
    } catch (Exception e) {
        Log.w(TAG, "Failed query: " + e);
    } finally {
        closeQuietly(c);
    }

    return results.toArray(new Uri[results.size()]);
}

源代码8 项目： microMathematics 文件： AdapterDocuments.java

private static int getDirItemsNumber(Context ctx, Uri u)
{
    int itemsNumber = 0;
    Cursor c = null;
    try
    {
        ContentResolver cr = ctx.getContentResolver();
        String dirId = DocumentsContract.getDocumentId(u);
        Uri dirUri = DocumentsContract.buildChildDocumentsUriUsingTree(u, dirId);
        c = cr.query(dirUri, projection, null, null, null);
        if (c != null)
        {
            itemsNumber = c.getCount();
        }
    }
    catch (Exception e)
    {
        // notning to do;
    }
    finally
    {
        if (c != null)
        {
            c.close();
        }
    }
    return itemsNumber;
}

源代码9 项目： android-ScopedDirectoryAccess 文件： ScopedDirectoryAccessFragment.java

private void updateDirectoryEntries(Uri uri) {
    mDirectoryEntries.clear();
    ContentResolver contentResolver = getActivity().getContentResolver();
    Uri docUri = DocumentsContract.buildDocumentUriUsingTree(uri,
            DocumentsContract.getTreeDocumentId(uri));
    Uri childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(uri,
            DocumentsContract.getTreeDocumentId(uri));

    try (Cursor docCursor = contentResolver
            .query(docUri, DIRECTORY_SELECTION, null, null, null)) {
        while (docCursor != null && docCursor.moveToNext()) {
            mCurrentDirectoryTextView.setText(docCursor.getString(docCursor.getColumnIndex(
                    DocumentsContract.Document.COLUMN_DISPLAY_NAME)));
        }
    }

    try (Cursor childCursor = contentResolver
            .query(childrenUri, DIRECTORY_SELECTION, null, null, null)) {
        while (childCursor != null && childCursor.moveToNext()) {
            DirectoryEntry entry = new DirectoryEntry();
            entry.fileName = childCursor.getString(childCursor.getColumnIndex(
                    DocumentsContract.Document.COLUMN_DISPLAY_NAME));
            entry.mimeType = childCursor.getString(childCursor.getColumnIndex(
                    DocumentsContract.Document.COLUMN_MIME_TYPE));
            mDirectoryEntries.add(entry);
        }

        if (mDirectoryEntries.isEmpty()) {
            mNothingInDirectoryTextView.setVisibility(View.VISIBLE);
        } else {
            mNothingInDirectoryTextView.setVisibility(View.GONE);
        }
        mAdapter.setDirectoryEntries(mDirectoryEntries);
        mAdapter.notifyDataSetChanged();
    }
}

源代码10 项目： Hentoid 文件： FileUtil.java

static List<DocumentFile> listDocumentFiles(
        @NonNull final Context context,
        @NonNull final DocumentFile parent,
        @NonNull final ContentProviderClient client,
        final FileHelper.NameFilter nameFilter,
        boolean listFolders,
        boolean listFiles) {
    final List<ImmutableTriple<Uri, String, Long>> results = new ArrayList<>();

    final Uri searchUri = DocumentsContract.buildChildDocumentsUriUsingTree(parent.getUri(), DocumentsContract.getDocumentId(parent.getUri()));
    try (Cursor c = client.query(searchUri, new String[]{
            DocumentsContract.Document.COLUMN_DOCUMENT_ID,
            DocumentsContract.Document.COLUMN_DISPLAY_NAME,
            DocumentsContract.Document.COLUMN_MIME_TYPE,
            DocumentsContract.Document.COLUMN_SIZE}, null, null, null)) {
        if (c != null)
            while (c.moveToNext()) {
                final String documentId = c.getString(0);
                final String documentName = c.getString(1);
                boolean isFolder = c.getString(2).equals(DocumentsContract.Document.MIME_TYPE_DIR);
                final Long documentSize = c.getLong(3);

                // FileProvider doesn't take query selection arguments into account, so the selection has to be done manually
                if ((null == nameFilter || nameFilter.accept(documentName)) && ((listFiles && !isFolder) || (listFolders && isFolder)))
                    results.add(new ImmutableTriple<>(DocumentsContract.buildDocumentUriUsingTree(parent.getUri(), documentId), documentName, documentSize));
            }
    } catch (Exception e) {
        Timber.w(e, "Failed query");
    }

    return convertFromUris(context, results);
}

源代码11 项目： edslite 文件： DocumentTreeFS.java

@Override
public com.sovworks.eds.fs.Directory.Contents list() throws IOException
{
    final Uri uri = _path.getDocumentUri();
    final Uri childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(uri,
            DocumentsContract.getDocumentId(uri));
    final ContentResolver resolver = _context.getContentResolver();
    final Cursor cursor = resolver.query(
            childrenUri,
            new String[]{DocumentsContract.Document.COLUMN_DOCUMENT_ID},
            DocumentsContract.Document.COLUMN_DOCUMENT_ID + "!=?",
            new String[] { ".android_secure" },
            null
    );
    return new com.sovworks.eds.fs.Directory.Contents()
    {
        @Override
        public void close() throws IOException
        {
            if (cursor != null)
                cursor.close();
        }

        @Override
        public Iterator<Path> iterator()
        {
            return new Iterator<Path>()
            {
                @Override
                public void remove()
                {

                }

                @Override
                public Path next()
                {
                    if (cursor == null)
                        throw new NoSuchElementException();
                    final String documentId = cursor.getString(0);
                    final Uri documentUri = DocumentsContract.buildDocumentUriUsingTree(uri,
                            documentId);
                    _hasNext = cursor.moveToNext();
                    Path newPath = new DocumentPath(documentUri);
                    synchronized (_parentsCache)
                    {
                        _parentsCache.put(newPath, _path);
                    }
                    return newPath;
                }

                @Override
                public boolean hasNext()
                {
                    return _hasNext;
                }

                private boolean _hasNext = cursor != null && cursor.moveToFirst();
            };
        }
    };

}

源代码12 项目： microMathematics 文件： AdapterDocuments.java

public final static ArrayList<SAFItem> getChildren(Context ctx, Uri u)
{
    Cursor c = null;
    try
    {
        ContentResolver cr = ctx.getContentResolver();
        String document_id = DocumentsContract.getDocumentId(u);
        Uri children_uri = DocumentsContract.buildChildDocumentsUriUsingTree(u, document_id);
        c = cr.query(children_uri, projection, null, null, null);
        if (c != null)
        {
            ArrayList<SAFItem> tmp_list = new ArrayList<>();
            if (c.getCount() == 0)
            {
                return tmp_list;
            }
            int ici = c.getColumnIndex(Document.COLUMN_DOCUMENT_ID);
            int nci = c.getColumnIndex(Document.COLUMN_DISPLAY_NAME);
            int sci = c.getColumnIndex(Document.COLUMN_SIZE);
            int mci = c.getColumnIndex(Document.COLUMN_MIME_TYPE);
            int dci = c.getColumnIndex(Document.COLUMN_LAST_MODIFIED);
            c.moveToFirst();
            do
            {
                SAFItem item = new SAFItem();
                String id = c.getString(ici);
                item.origin = DocumentsContract.buildDocumentUriUsingTree(u, id);
                item.attr = c.getString(mci);
                item.dir = Document.MIME_TYPE_DIR.equals(item.attr);
                item.name = c.getString(nci);
                item.size = c.getLong(sci);
                item.date = new Date(c.getLong(dci));
                if (item.dir)
                {
                    item.size = -1;
                    item.attr = Integer.toString(getDirItemsNumber(ctx, (Uri) item.origin)) + " "
                            + ctx.getString(R.string.dialog_list_items);
                }
                tmp_list.add(item);
            }
            while (c.moveToNext());
            return tmp_list;
        }
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
    finally
    {
        if (c != null)
        {
            c.close();
        }
    }
    return null;
}

源代码13 项目： android-DirectorySelection 文件： DirectorySelectionFragment.java

/**
 * Updates the current directory of the uri passed as an argument and its children directories.
 * And updates the {@link #mRecyclerView} depending on the contents of the children.
 *
 * @param uri The uri of the current directory.
 */
//VisibileForTesting
void updateDirectoryEntries(Uri uri) {
    ContentResolver contentResolver = getActivity().getContentResolver();
    Uri docUri = DocumentsContract.buildDocumentUriUsingTree(uri,
            DocumentsContract.getTreeDocumentId(uri));
    Uri childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(uri,
            DocumentsContract.getTreeDocumentId(uri));

    Cursor docCursor = contentResolver.query(docUri, new String[]{
            Document.COLUMN_DISPLAY_NAME, Document.COLUMN_MIME_TYPE}, null, null, null);
    try {
        while (docCursor.moveToNext()) {
            Log.d(TAG, "found doc =" + docCursor.getString(0) + ", mime=" + docCursor
                    .getString(1));
            mCurrentDirectoryUri = uri;
            mCurrentDirectoryTextView.setText(docCursor.getString(0));
            mCreateDirectoryButton.setEnabled(true);
        }
    } finally {
        closeQuietly(docCursor);
    }

    Cursor childCursor = contentResolver.query(childrenUri, new String[]{
            Document.COLUMN_DISPLAY_NAME, Document.COLUMN_MIME_TYPE}, null, null, null);
    try {
        List<DirectoryEntry> directoryEntries = new ArrayList<>();
        while (childCursor.moveToNext()) {
            Log.d(TAG, "found child=" + childCursor.getString(0) + ", mime=" + childCursor
                    .getString(1));
            DirectoryEntry entry = new DirectoryEntry();
            entry.fileName = childCursor.getString(0);
            entry.mimeType = childCursor.getString(1);
            directoryEntries.add(entry);
        }
        mAdapter.setDirectoryEntries(directoryEntries);
        mAdapter.notifyDataSetChanged();
    } finally {
        closeQuietly(childCursor);
    }
}

方法所在类

android.provider.DocumentsContract