Example usage for android.provider DocumentsContract buildChildDocumentsUriUsingTree

Introduction

In this page you can find the example usage for android.provider DocumentsContract buildChildDocumentsUriUsingTree.

Prototype

public static Uri buildChildDocumentsUriUsingTree(Uri treeUri, String parentDocumentId) 

Source Link

Document

Build URI representing the children of the target directory in a document provider.

Usage

From source file:com.anthonymandra.support.v4.provider.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;// ww  w .  j  av a  2s  .c o  m
    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()]);
}

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From source file:com.example.android.directoryselection.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.
 *///from w  w w. j  a va 2s  . c  o m
//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);
    }
}

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From source file:com.example.android.scopeddirectoryaccess.ScopedDirectoryAccessFragment.java

private void updateDirectoryEntries(Uri uri) {
    mDirectoryEntries.clear();/* ww w .jav  a2  s .  c  o m*/
    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();
    }
}

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