Share Texts to Whats up using Intent, Whats up is not finish after share Text sucessfully,and not return back to my app

this is my code.

Intent sendIntent = new Intent();
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT, "This is my text to send.");
sendIntent.setType("text/plain");
startActivity(Intent.createChooser(sendIntent,getResources().getText(R.string.send_to)));

when choose share app whats up, after share text ,i can not return to my app.