The specified child already has a parent. You must call removeView() on the child's parent first (Android)

I have to switch between two layouts frequently. The error is happening in the layout posted below. When my layout is called the first time, there doesn't occur any error and everything's fine. When I then call a different layout (a blank one) and afterwards call my layout a second time, it throws the following error: ``` > FATAL EXCEPTION: main > java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. ``` My layout-code looks like this: ``` tv = new TextView(getApplicationContext()); // are initialized somewhere else et = new EditText(getApplicationContext()); // in the code private void ConsoleWindow(){ runOnUiThread(new Runnable(){ @Override public void run(){ // MY LAYOUT: setContentView(R.layout.activity_console); // LINEAR LAYOUT LinearLayout layout=new LinearLayout(getApplicationContext()); layout.setOrientation(LinearLayout.VERTICAL); setContentView(layout); // TEXTVIEW layout.addView(tv); // <========== ERROR IN THIS LINE DURING 2ND RUN // EDITTEXT et.setHint("Enter Command"); layout.addView(et); } } } ``` I know this question has been asked before, but it didn't help in my case.