Question

在我的MainActivity中，这是我的选项菜单代码 -

@Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_profile) {
            return true;
        }
        if (id == R.id.action_password) {
            return true;
        }
        if (id == R.id.action_update) {
            return true;
        }
        if (id == R.id.action_signin) {
            return true;
        }
        if (id == R.id.action_help) {
            return true;
        }
        if (id == R.id.action_use_terms) {
            return true;
        }
        if (id == R.id.action_policy) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

创建了一个名为fragment_changepassword.xml和ChangePassword.java的片段。现在我想从 -

调用该片段

if (id == R.id.action_password) {
            return true;
        }

这一部分，但搜索谷歌但没有得到任何帮助，终于带着希望来到这里。

从Tab中调用其他片段更容易 -

@Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            if (getArguments().getInt(ARG_SECTION_NUMBER) == 1) {
                View rootView = inflater.inflate(R.layout.fragment_home, container, false);
                return rootView;
            } else if (getArguments().getInt(ARG_SECTION_NUMBER) == 2) {
                View rootView = inflater.inflate(R.layout.fragment_videos, container, false);
                return rootView;
            } else if (getArguments().getInt(ARG_SECTION_NUMBER) == 3){
                View rootView = inflater.inflate(R.layout.fragment_messages, container, false);
                return rootView;
            }
            else if (getArguments().getInt(ARG_SECTION_NUMBER) == 4){
                View rootView = inflater.inflate(R.layout.fragment_audios, container, false);
                return rootView;
            }
            else {
                View rootView = inflater.inflate(R.layout.fragment_images, container, false);
                return rootView;
            }
        }

Answer 1

要从活动中设置容器（在xml中定义）中的片段，必须使用SupportFragmentManager。试试这段代码

if (id == R.id.action_password) {
      getSupportFragmentManager().beginTransaction()
              .replace(R.id.container, ChangePasswordFragment.newInstance())
              .commit();
      return true;
    }

在片段calss中提供newInstance()方法。像这样的东西 -

public static ChangePasswordFragment newInstance() {
    return new ChangePasswordFragment();
  }

从MainActivity的onOptionsItemSelected（）方法调用片段

1 个答案: