Android saving file to external storage

Question

I have a little issue with creating a directory and saving a file to it on my android application. I\'m using this piece of code to do this :

String filename         


        

Answer 1

Update 2018, SDK >= 23.

Now you should also check if the user has granted permission to external storage by using:

public boolean isStoragePermissionGranted() {
    String TAG = "Storage Permission";
    if (Build.VERSION.SDK_INT >= 23) {
        if (this.checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
                == PackageManager.PERMISSION_GRANTED) {
            Log.v(TAG, "Permission is granted");
            return true;
        } else {
            Log.v(TAG, "Permission is revoked");
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
            return false;
        }
    }
    else { //permission is automatically granted on sdk<23 upon installation
        Log.v(TAG,"Permission is granted");
        return true;
    }
}

public void saveImageBitmap(Bitmap image_bitmap, String image_name) {
    String root = Environment.getExternalStorageDirectory().toString();
    if (isStoragePermissionGranted()) { // check or ask permission
        File myDir = new File(root, "/saved_images");
        if (!myDir.exists()) {
            myDir.mkdirs();
        }
        String fname = "Image-" + image_name + ".jpg";
        File file = new File(myDir, fname);
        if (file.exists()) {
            file.delete();
        }
        try {
            file.createNewFile(); // if file already exists will do nothing
            FileOutputStream out = new FileOutputStream(file);
            image_bitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
            out.flush();
            out.close();

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

        MediaScannerConnection.scanFile(this, new String[]{file.toString()}, new String[]{file.getName()}, null);
    }
}

and of course, add in the AndroidManifest.xml: