Question

i am trying to share an image from the drawables in my application. i keep getting java.io.FileNotFoundException:/abc.jpg (read-only file system)

my code is

  private String SaveCache(int resID) {
            String path = "";  
            try {
                InputStream is = getResources().openRawResource(resID);
                File cacheDir = this.getExternalCacheDir();
                File downloadingMediaFile = new File(cacheDir, "abc.jpg");
                byte[] buf = new byte[256];
                FileOutputStream out = new FileOutputStream(downloadingMediaFile);   
                while (true) {
                    int rd = is.read(buf, 0, 256);
                    if (rd == -1 || rd == 0)
                        break;
                    out.write(buf, 0, rd);              
                }
                is.close();
                out.close();
                return downloadingMediaFile.getPath();
            } catch (Exception ex) {
                Toast.makeText(this, ex.toString(), Toast.LENGTH_LONG).show();
                ex.printStackTrace();
            }
            return path;
        }



        private void ImageShare() {
            String path = SaveCache(R.drawable.testsend);
            Toast.makeText(this, path, Toast.LENGTH_LONG).show();
            Intent share = new Intent(android.content.Intent.ACTION_SEND);
            share.setType("image/jpeg");
            share.putExtra(Intent.EXTRA_SUBJECT, "test");
            share.putExtra(Intent.EXTRA_TEXT, "test");
            share.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://" + path));       
            try {
                startActivity(Intent.createChooser(share, "Choose share method."));
            } catch (Exception ex) {
                ex.printStackTrace();
            }

        }

Any help is appreciated, if more info is required i will be happy to provide.

Answer 1

Make sure that the external storage is mounted.

From the docs of getExternalCacheDir():

Returns the path of the directory holding application cache files on
external storage. Returns null if external storage is not currently
mounted so it could not ensure the path exists; you will need to call
this method again when it is available.