Example usage for android.content ContentResolver openFileDescriptor

Introduction

In this page you can find the example usage for android.content ContentResolver openFileDescriptor.

Prototype

public final @Nullable ParcelFileDescriptor openFileDescriptor(@NonNull Uri uri, @NonNull String mode)
        throws FileNotFoundException 

Source Link

Document

Open a raw file descriptor to access data under a URI.

Usage

From source file:Main.java

private static ParcelFileDescriptor makeInputStream(Uri uri, ContentResolver cr) {
    try {//from w w w  . j a v  a2s .co m
        return cr.openFileDescriptor(uri, "r");
    } catch (IOException ex) {
        return null;
    }
}

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From source file:Main.java

/**
 * Make a bitmap from a given Uri./*from   w  ww .j  a v a 2  s . c  o  m*/
 * 
 * @param uri
 */

@SuppressWarnings("unused")
private static ParcelFileDescriptor makeInputStream(Uri uri, ContentResolver cr) {
    try {
        return cr.openFileDescriptor(uri, "r");
    } catch (IOException ex) {
        return null;
    }
}

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From source file:Main.java

public static boolean isUriValid(Uri uri, ContentResolver resolver) {
    if (uri == null)
        return false;

    try {//  w ww .  ja  va  2 s .c o  m
        ParcelFileDescriptor pfd = resolver.openFileDescriptor(uri, "r");
        if (pfd == null) {
            Log.e(TAG, "Fail to open URI. URI=" + uri);
            return false;
        }
        pfd.close();
    } catch (IOException ex) {
        return false;
    }
    return true;
}

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From source file:Main.java

/**
 * Helper method to open a content URI and returns the ParcelFileDescriptor.
 *
 * @param context {@link Context} in interest.
 * @param uriString the content URI to open.
 * @return ParcelFileDescriptor of the content URI, or NULL if the file does not exist.
 *//*w w w.j  a  v  a 2 s . c o m*/
private static ParcelFileDescriptor getParcelFileDescriptor(Context context, String uriString) {
    ContentResolver resolver = context.getContentResolver();
    Uri uri = Uri.parse(uriString);

    ParcelFileDescriptor pfd = null;
    try {
        pfd = resolver.openFileDescriptor(uri, "r");
    } catch (FileNotFoundException e) {
        Log.w(TAG, "Cannot find content uri: " + uriString, e);
    } catch (SecurityException e) {
        Log.w(TAG, "Cannot open content uri: " + uriString, e);
    } catch (IllegalArgumentException e) {
        Log.w(TAG, "Unknown content uri: " + uriString, e);
    } catch (IllegalStateException e) {
        Log.w(TAG, "Unknown content uri: " + uriString, e);
    }
    return pfd;
}

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From source file:Main.java

public static Bitmap getArtworkQuick(Context context, long album_id, int w, int h) {
    // NOTE: There is in fact a 1 pixel border on the right side in the
    // ImageView//from ww  w .  jav  a2 s. co m
    // used to display this drawable. Take it into account now, so we don't
    // have to
    // scale later.
    w -= 1;
    ContentResolver res = context.getContentResolver();
    Uri uri = ContentUris.withAppendedId(sArtworkUri, album_id);
    if (uri != null) {
        ParcelFileDescriptor fd = null;
        try {
            fd = res.openFileDescriptor(uri, "r");
            int sampleSize = 1;

            // Compute the closest power-of-two scale factor
            // and pass that to sBitmapOptionsCache.inSampleSize, which will
            // result in faster decoding and better quality
            sBitmapOptionsCache.inJustDecodeBounds = true;
            BitmapFactory.decodeFileDescriptor(fd.getFileDescriptor(), null, sBitmapOptionsCache);
            int nextWidth = sBitmapOptionsCache.outWidth >> 1;
            int nextHeight = sBitmapOptionsCache.outHeight >> 1;
            while (nextWidth > w && nextHeight > h) {
                sampleSize <<= 1;
                nextWidth >>= 1;
                nextHeight >>= 1;
            }

            sBitmapOptionsCache.inSampleSize = sampleSize;
            sBitmapOptionsCache.inJustDecodeBounds = false;
            Bitmap b = BitmapFactory.decodeFileDescriptor(fd.getFileDescriptor(), null, sBitmapOptionsCache);

            if (b != null) {
                // finally rescale to exactly the size we need
                if (sBitmapOptionsCache.outWidth != w || sBitmapOptionsCache.outHeight != h) {
                    Bitmap tmp = Bitmap.createScaledBitmap(b, w, h, true);
                    // Bitmap.createScaledBitmap() can return the same
                    // bitmap
                    if (tmp != b)
                        b.recycle();
                    b = tmp;
                }
            }

            return b;
        } catch (FileNotFoundException e) {
        } finally {
            try {
                if (fd != null)
                    fd.close();
            } catch (IOException e) {
            }
        }
    }
    return null;
}

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From source file:Main.java

@Nullable
private static File getFromMediaUriPfd(Context context, ContentResolver resolver, Uri uri) {
    if (uri == null)
        return null;

    FileInputStream input = null;
    FileOutputStream output = null;
    try {/*from  ww w .  ja  va  2 s .  c o  m*/
        ParcelFileDescriptor pfd = resolver.openFileDescriptor(uri, "r");
        FileDescriptor fd = pfd.getFileDescriptor();
        input = new FileInputStream(fd);

        String tempFilename = getTempFilename(context);
        output = new FileOutputStream(tempFilename);

        int read;
        byte[] bytes = new byte[4096];
        while ((read = input.read(bytes)) != -1) {
            output.write(bytes, 0, read);
        }
        return new File(tempFilename);
    } catch (IOException ignored) {
        // Nothing we can do
    } finally {
        closeSilently(input);
        closeSilently(output);
    }
    return null;
}

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From source file:Main.java

private static File getFromMediaUriPfd(Context context, ContentResolver resolver, Uri uri) {
    if (uri == null)
        return null;

    FileInputStream input = null;
    FileOutputStream output = null;
    try {//from   ww  w  .  j  ava 2  s  .  c o  m
        ParcelFileDescriptor pfd = resolver.openFileDescriptor(uri, "r");
        FileDescriptor fd = pfd.getFileDescriptor();
        input = new FileInputStream(fd);

        String tempFilename = getTempFilename(context);
        output = new FileOutputStream(tempFilename);

        int read;
        byte[] bytes = new byte[4096];
        while ((read = input.read(bytes)) != -1) {
            output.write(bytes, 0, read);
        }
        return new File(tempFilename);
    } catch (IOException ignored) {
        // Nothing we can do
    } finally {
        closeSilently(input);
        closeSilently(output);
    }
    return null;
}

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From source file:com.ultramegasoft.flavordex2.util.PhotoUtils.java

/**
 * Load a Bitmap from an image file.//from   w w w  .  ja  v  a 2s.co m
 *
 * @param context   The Context
 * @param uri       The Uri to the image file
 * @param reqWidth  The requested width of the decoded Bitmap
 * @param reqHeight The requested height of the decoded Bitmap
 * @return A Bitmap
 */
@Nullable
public static Bitmap loadBitmap(@NonNull Context context, @NonNull Uri uri, int reqWidth, int reqHeight) {
    final ContentResolver cr = context.getContentResolver();
    try {
        final ParcelFileDescriptor parcelFileDescriptor = cr.openFileDescriptor(uri, "r");
        if (parcelFileDescriptor == null) {
            Log.w(TAG, "Unable to open " + uri.toString());
            return null;
        }
        try {
            final FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
            final Options opts = new BitmapFactory.Options();
            opts.inJustDecodeBounds = true;
            BitmapFactory.decodeFileDescriptor(fileDescriptor, null, opts);

            opts.inSampleSize = calculateInSampleSize(opts, reqWidth, reqHeight);
            opts.inJustDecodeBounds = false;

            final Bitmap bitmap = BitmapFactory.decodeFileDescriptor(fileDescriptor, null, opts);
            if ("image/jpeg".equals(opts.outMimeType)) {
                return rotatePhoto(context, uri, bitmap);
            }
            return bitmap;
        } catch (OutOfMemoryError e) {
            Log.e(TAG, "Out of memory", e);
        } finally {
            parcelFileDescriptor.close();
        }
    } catch (FileNotFoundException e) {
        Log.w(TAG, "File not found: " + uri.toString());
    } catch (SecurityException e) {
        Log.w(TAG, "Permission denied for Uri: " + uri.toString());
    } catch (IOException e) {
        Log.e(TAG, "Failed to load bitmap", e);
    }
    return null;
}

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From source file:com.frostwire.android.LollipopFileSystem.java

private static OutputStream openOutputStream(Context context, DocumentFile f) throws IOException {
    ContentResolver cr = context.getContentResolver();
    ParcelFileDescriptor pfd = cr.openFileDescriptor(f.getUri(), "rw");

    int fd = pfd.detachFd(); // this trick the internal system to trigger the media scanner on nothing
    pfd = ParcelFileDescriptor.adoptFd(fd);

    return new AutoSyncOutputStream(pfd);
}

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From source file:com.serenegiant.testmediastore.MediaStorePhotoAdapter.java

private static final Bitmap getImage(ContentResolver cr, long id, int requestWidth, int requestHeight)
        throws FileNotFoundException, IOException {

    Bitmap result = null;/*  w  w w .  j a  va2s  .c  o  m*/
    final ParcelFileDescriptor pfd = cr.openFileDescriptor(
            ContentUris.withAppendedId(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, id), "r");
    if (pfd != null) {
        try {
            final BitmapFactory.Options options = new BitmapFactory.Options();
            // just decorde to get image size
            options.inJustDecodeBounds = true;
            BitmapFactory.decodeFileDescriptor(pfd.getFileDescriptor(), null, options);
            // calculate sub-sampling
            options.inSampleSize = calcSampleSize(options, requestWidth, requestHeight);
            options.inJustDecodeBounds = false;
            result = BitmapFactory.decodeFileDescriptor(pfd.getFileDescriptor(), null, options);
        } finally {
            pfd.close();
        }
    }
    return result;
}

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