gistfile1.txt

    public void invokePicker(Integer requestCode) {
        Intent intentGetContent = new Intent(Intent.ACTION_GET_CONTENT,
                MediaStore.Images.Media.INTERNAL_CONTENT_URI);
        intentGetContent.setType("image/*");
        final PackageManager pm = getPackageManager();
        final Intent i = new Intent(intentGetContent);
        final List list = pm.queryIntentActivities(i, PackageManager.MATCH_DEFAULT_ONLY);
        if (list.size() > 0) {
            startActivityForResult(intentGetContent, requestCode);
        } else {
            Intent intentPick = new Intent(Intent.ACTION_PICK,
                    MediaStore.Images.Media.INTERNAL_CONTENT_URI);
            intentPick.setType("image/*");
            startActivityForResult(Intent.createChooser(intentPick, "Complete action using"),
                    requestCode);
        }

    }