? ?@Override ? ?protected void onCreate(Bundle savedInstanceState) { ? ? ? ?super.onCreate(savedInstanceState); ? ? ? ?setContentView(R.layout.news_content); ? ? ? ?String newsTitle = getIntent().getStringExtra("news_title"); ? ? ? ?String newsContent = getIntent().getStringExtra("news_content"); ? ? ? ?NewsContentFragment newsContentFragment = (NewsContentFragment) getSupportFragmentManager().findFragmentById(R.id.news_content_fragment); ? ? ? ?newsContentFragment.refresh(newsTitle, newsContent); ? ?}}?NewsContentFragment newsContentFragment = (NewsContentFragment) getSupportFragmentManager().findFragmentById(R.id.news_content_fragment);這段代碼顯示? ? ?cannot cast 'android.support.v4.app.Fragment' to ? ?'com.example.sweetstar.fragmentbestpractice.NewsContentFragment ? 錯誤