2

アップデート:

PDFファイルを保存するには:

以下の回答セクションで。

ビットマップ ファイルを保存するには:

@RequiresApi(api = Build.VERSION_CODES.Q)
@NonNull
private Uri saveBitmap(@NonNull final Context context, @NonNull final Bitmap bitmap,
                       @NonNull final Bitmap.CompressFormat format, @NonNull final String mimeType,
                       @NonNull final String displayName, @Nullable final String subFolder) throws IOException {
    String relativeLocation = Environment.DIRECTORY_PICTURES;

    if (!TextUtils.isEmpty(subFolder)) {
        relativeLocation += File.separator + subFolder;
    }

    final ContentValues contentValues = new ContentValues();
    contentValues.put(MediaStore.MediaColumns.DISPLAY_NAME, displayName);
    contentValues.put(MediaStore.MediaColumns.MIME_TYPE, mimeType);
    contentValues.put(MediaStore.MediaColumns.RELATIVE_PATH, relativeLocation);

    final ContentResolver resolver = context.getContentResolver();

    OutputStream stream = null;
    Uri uri = null;

    try {
        final Uri contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
        uri = resolver.insert(contentUri, contentValues);

        if (uri == null) {
            throw new IOException("Failed to create new MediaStore record.");
        }

        stream = resolver.openOutputStream(uri);

        if (stream == null) {
            throw new IOException("Failed to get output stream.");
        }

        if (!bitmap.compress(format, 95, stream)) {
            throw new IOException("Failed to save bitmap.");
        }

        return uri;
    } catch (IOException e) {
        if (uri != null) {
            // Don't leave an orphan entry in the MediaStore
            resolver.delete(uri, null, null);
        }

        throw e;
    } finally {
        if (stream != null) {
            stream.close();
        }
    }
}
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