<EditText
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:editable="false"
  style="?android:attr/textViewStyle"
  android:textColor="@color/white"
  android:textAppearance="@android:style/TextAppearance.Medium"
  android:cursorVisible="false"
  android:background="@null" />

@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
    //user has long pressed your TextView
    menu.add(0, v.getId(), 0, "text that you want to show in the context menu - I use simply Copy");

    //cast the received View to TextView so that you can get its text
    TextView yourTextView = (TextView) v;

    //place your TextView's text in clipboard
    ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
    clipboard.setText(yourTextView.getText());
}

<TextView
    android:id="@+id/deviceIdTV"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textIsSelectable="true"
    android:text="" />