gistfile1.java

public void onClickShare(View v) {
  Intent photoPicker = new Intent(Intent.ACTION_PICK);
  photoPicker.setType("image/*");
  startActivityForResult(photoPicker, REQ_SELECT_PHOTO);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  super.onActivityResult(requestCode, resultCode, data);

  if(requestCode == REQ_SELECT_PHOTO) {
    if(resultCode == RESULT_OK) {
      Uri selectedImage = data.getData();
      ContentResolver cr = this.getContentResolver();
      String mime = cr.getType(selectedImage);

      PlusShare.Builder share = new PlusShare.Builder(this);
      share.setText("hello everyone!");
      share.addStream(selectedImage);
      share.setType(mime);
      startActivityForResult(share.getIntent(), REQ_START_SHARE);
    }
  }
}