Intent detail = new Intent(Intent.ACTION_VIEW, Uri.parse("imdb://<imdb_id>"));
if (context.getPackageManager().resolveActivity(test, 0) != null) {
    startActivity(this, detail);
} else {
    Toast.makeText(this, "IMDB not installed", Toast.LENGTH_LONG).show();
}

startActivity(this, new Intent("target.app.action"));