如何创建要在 Android 库中显示的应用程序图像文件夹

Question

I have an app where the user creates an image and then I want to save it so it's visible form the default gallery application.

Now I don't want the pictures to be saved in the same folder as the pictures taken from the camera, I want them to be saved in a folder dedicated to the app, just like images from apps like whatsapp or facebook.

I've tried saving them in this two locations:

File imagePath = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM)+ File.separator + appDirectoryName + File.separator);

and here

File imagePath = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)+ File.separator + appDirectoryName + File.separator);

If I browse through the phone I see that I successfully save the images but they don't show in the gallery app. It is obvious that I'm missing something but I don't know what it is. Maybe adding some kind of metadata to the files or folders so the gallery recognizes them?

Answer 1

Well I found the answer in the end.

It turned out to be what I suspected. The saved image needs to have some metadata added in order to be seen in the gallery (at least in my device).

This is what I did:

OutputStream fOut = null;
    File file = new File(imagePath,"GE_"+ System.currentTimeMillis() +".jpg");

    try {
        fOut = new FileOutputStream(file);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }

    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fOut);
    try {
        fOut.flush();
        fOut.close();
    } catch (IOException e) {
        e.printStackTrace();
    }

    ContentValues values = new ContentValues();
    values.put(Images.Media.TITLE, this.getString(R.string.picture_title));
    values.put(Images.Media.DESCRIPTION, this.getString(R.string.picture_description));
    values.put(Images.Media.DATE_TAKEN, System.currentTimeMillis ());
    values.put(Images.ImageColumns.BUCKET_ID, file.toString().toLowerCase(Locale.US).hashCode());
    values.put(Images.ImageColumns.BUCKET_DISPLAY_NAME, file.getName().toLowerCase(Locale.US));
    values.put("_data", file.getAbsolutePath());

    ContentResolver cr = getContentResolver();
    cr.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);

Answer 2

I have had the same problem. The second way is the correct way, but you don't see the images in the Gallery because the gallery needs to be refreshed. So, you can wait a while until it refreshes itself, or you can use the MediaScanner - look here

Hope this helped!

Answer 3

Try this

private void createDirectoryAndSaveFile(Bitmap imageToSave, String fileName) {

    File direct = new File(Environment.getExternalStorageDirectory() + "/DirName");

    if (!direct.exists()) {
        File wallpaperDirectory = new File("/sdcard/DirName/");
        wallpaperDirectory.mkdirs();
    }

        File file = new File(new File("/sdcard/DirName/"), fileName);
        if (file.exists())
            file.delete();
        try {
            FileOutputStream out = new FileOutputStream(file);
            imageToSave.compress(Bitmap.CompressFormat.JPEG, 100, out);
            out.flush();
            out.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
 }

Answer 4

I did the following to get it to work:

public void galleryAddPic() {
    Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_MOUNTED);
    String mCurrentPhotoPath = "file:" + image.getAbsolutePath(); // image is the created file image
    File file = new File(mCurrentPhotoPath);
    Uri contentUri = Uri.fromFile(file);
    mediaScanIntent.setData(contentUri);
    sendBroadcast(mediaScanIntent);
}

Answer 5

I tried this it works perfectly.

private Uri imageUri;
String getimgname, getimgpath;
intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File photo = new File(Environment.getExternalStorageDirectory(),  "IMG"+System.currentTimeMillis()+".jpg");
intent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(photo));
imageUri = Uri.fromFile(photo);
getimgname = photo.getName();
getimgpath = photo.getAbsolutePath();

Answer 6

Try this

MediaScannerConnection.scanFile(context,
                new String[] { file.toString() }, null,
                new MediaScannerConnection.OnScanCompletedListener() {
                    public void onScanCompleted(String path, Uri uri) {
                        Log.i("ExternalStorage", "Scanned " + path + ":");
                        Log.i("ExternalStorage", "-> uri=" + uri);
                    }
                });