请尝试下一种方法。Android
Q已经负责创建文件夹（如果不存在）。该示例经过硬编码后可以输出到Pictures文件夹中。如果您需要一个子文件夹，请在下一个子文件夹名称后添加：
final String relativeLocation = Environment.DIRECTORY_PICTURES + File.separator + “YourSubforderName”;
考虑到压缩格式应与mime-type参数相关。例如，对于JPEG压缩格式，mime类型将为“ image / jpeg”，依此类推。
private void saveBitmap(@NonNull final Context context, @NonNull final Bitmap bitmap, @NonNull final Bitmap.CompressFormat format, @NonNull final String mimeType, @NonNull final String displayName) throws IOException{ final String relativeLocation = Environment.DIRECTORY_PICTURES; 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) == false) { throw new IOException("Failed to save bitmap."); } } 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(); } }}
