在我的应用中,我必须经常在两种布局之间切换。错误在下面发布的布局中发生。
第一次调用布局时,没有发生任何错误,一切都很好。然后,当我调用不同的布局(空白),然后再次调用我的布局时,出现以下错误:
> FATAL EXCEPTION: main > java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
我的布局代码如下所示:
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); } } }
我知道之前曾有人问过这个问题,但对我来说没有帮助。
错误消息说明你应该做什么。
// TEXTVIEW if(tv.getParent() != null) { ((ViewGroup)tv.getParent()).removeView(tv); // <- fix } layout.addView(tv); // <========== ERROR IN THIS LINE DURING 2ND RUN // EDITTEXT