Activity has leaked window that was originally added 問題解決

在做練習的時候，切換屏幕豎恆狀態時，會出現Activity has leaked window that was originally added 錯誤。網上查詢得知原因是因為alertDilaog沒有關閉所造成的。有2種解決方案：   1)：       @Override protected void onPause()  { super.onPause();         //關閉對話框 AlertDialog.dismiss(); }     2):    AndroidManifest.xml  中給相應的<Activity>節點添加android:configChanges="orientation|keyboardHidden|navigation"