Example usage for android.support.v4.provider DocumentFile getParentFile

Introduction

In this page you can find the example usage for android.support.v4.provider DocumentFile getParentFile.

Prototype

public DocumentFile getParentFile() 

Source Link

Usage

From source file:com.kanedias.vanilla.lyrics.LyricsShowActivity.java

/**
 * Write lyrics to *.lrc file through SAF framework - the only way to do it in Android > 4.4 when working with SD card
 *//*from ww w . ja  v  a  2s. c o  m*/
private void writeThroughSaf(byte[] data, File original, String name) {
    DocumentFile originalRef;
    if (mPrefs.contains(PREF_SDCARD_URI)) {
        // no sorcery can allow you to gain URI to the document representing file you've been provided with
        // you have to find it again now using Document API

        // /storage/volume/Music/some.mp3 will become [storage, volume, music, some.mp3]
        List<String> pathSegments = new ArrayList<>(Arrays.asList(original.getAbsolutePath().split("/")));
        Uri allowedSdRoot = Uri.parse(mPrefs.getString(PREF_SDCARD_URI, ""));
        originalRef = findInDocumentTree(DocumentFile.fromTreeUri(this, allowedSdRoot), pathSegments);
    } else {
        // user will click the button again
        return;
    }

    if (originalRef == null || originalRef.getParentFile() == null) {
        // nothing selected or invalid file?
        Toast.makeText(this, R.string.saf_nothing_selected, Toast.LENGTH_LONG).show();
        return;
    }

    DocumentFile lrcFileRef = originalRef.getParentFile().createFile("image/*", name);
    if (lrcFileRef == null) {
        // couldn't create file?
        Toast.makeText(this, R.string.saf_write_error, Toast.LENGTH_LONG).show();
        return;
    }

    try {
        ParcelFileDescriptor pfd = getContentResolver().openFileDescriptor(lrcFileRef.getUri(), "rw");
        if (pfd == null) {
            // should not happen
            Log.e(LOG_TAG, "SAF provided incorrect URI!" + lrcFileRef.getUri());
            return;
        }

        FileOutputStream fos = new FileOutputStream(pfd.getFileDescriptor());
        fos.write(data);
        fos.close();

        // rescan original file
        Toast.makeText(this, R.string.file_written_successfully, Toast.LENGTH_SHORT).show();
    } catch (Exception e) {
        Toast.makeText(this, getString(R.string.saf_write_error) + e.getLocalizedMessage(), Toast.LENGTH_LONG)
                .show();
        Log.e(LOG_TAG, "Failed to write to file descriptor provided by SAF!", e);
    }
}

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From source file:com.almalence.plugins.capture.video.VideoCapturePlugin.java

/**
 * Appends mp4 audio/video from {@code anotherFileDescriptor} to
 * {@code mainFileDescriptor}./*from   w  w  w .  j av a  2s.co  m*/
 */
public static DocumentFile appendNew(DocumentFile[] inputFiles) {
    try {
        DocumentFile targetFile = inputFiles[0];
        int[] inputFilesFds = new int[inputFiles.length];
        ArrayList<ParcelFileDescriptor> pfdsList = new ArrayList<ParcelFileDescriptor>();

        int i = 0;
        for (DocumentFile f : inputFiles) {
            ParcelFileDescriptor pfd = ApplicationScreen.instance.getContentResolver()
                    .openFileDescriptor(f.getUri(), "rw");
            pfdsList.add(pfd);
            inputFilesFds[i] = pfd.getFd();
            i++;
        }

        if (targetFile.exists() && targetFile.length() > 0) {
            String tmpFileName = targetFile.getName() + ".tmp";
            DocumentFile tmpTargetFile = targetFile.getParentFile().createFile("video/mp4", tmpFileName);
            ParcelFileDescriptor targetFilePfd = ApplicationScreen.instance.getContentResolver()
                    .openFileDescriptor(tmpTargetFile.getUri(), "rw");

            Mp4Editor.appendFds(inputFilesFds, targetFilePfd.getFd());

            targetFilePfd.close();
            for (ParcelFileDescriptor pfd : pfdsList) {
                pfd.close();
            }

            return tmpTargetFile;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

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