Question

我有一个沙箱项目，一切正常，但不是真正的项目。我想我错过了什么......

在我的主要活动中（我尽可能地简化了一个项目）：

@Override
  public void onCreate(Bundle bundle) {
    super.onCreate(bundle);
    setContentView(createUI());
  }

  public View createUI() {
    LinearLayout rootLayout = new LinearLayout(this);
    rootLayout.setOrientation(LinearLayout.HORIZONTAL);
    rootLayout.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT));
    LinearLayout leftLayout = new LinearLayout(this);
    leftLayout.setLayoutParams(new LinearLayout.LayoutParams(300, ViewGroup.LayoutParams.FILL_PARENT));
    leftLayout.setId(11111);

    android.widget.TextView textView = new android.widget.TextView(this);
    textView.setText("112233");

    rootLayout.addView(textView);
    rootLayout.addView(leftLayout);
    {
      FragmentTransaction transaction = getFragmentManager().beginTransaction();
      ModelEditorFragment simpleFragment = new SimpleFragment();
      transaction.add(11111, simpleFragment);
    }
    return rootLayout;
  }

在SimpleFragment.java中：

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle bundle) {
    TextView textView = new TextView(getActivity());
    textView.setText("SimpleFragmentText");
    return textView;

但是当我开始时，我只看到没有SimpleFragmentText的112233。调试时我注意到onCreateView方法永远不会被调用...为什么？看起来相同的代码在独立应用程序中运行良好...可能还有其他我不知道的事情吗？

Answer 1

我忘了transaction.commit：

{
      FragmentTransaction transaction = getFragmentManager().beginTransaction();
      ModelEditorFragment simpleFragment = new SimpleFragment();
      transaction.add(11111, simpleFragment);
      transaction.commit();
    }

Answer 2

rootLayout.addView(textView);
{
    rootLayout.addView(leftLayout);
    {
      FragmentTransaction transaction = getFragmentManager().beginTransaction();
      ModelEditorFragment simpleFragment = new SimpleFragment();
      transaction.add(11111, simpleFragment);
    }
}
    return rootLayout;

尝试我认为你的rootLayout只是缺少textView添加部分

Android：片段：未调用onCreateView

2 个答案: