Question

我有一项活动。在活动中有一个片段持有者。当应用程序运行时，我显示fragment_1。在fragment_1中，我有一个按钮。当我单击该按钮时，片段持有者将更改为fragment_2。

Answer 1

试试这个

在Fragment1创建名为OnFragment1ActiontListener的公共接口并处理onAttach()中的逻辑

public class Fragment1 {

    OnFragment1ActiontListener mCallback;

    // Container Activity must implement this interface
    public interface OnFragment1ActiontListener {
        public void onSwitchToFragment2();
    }

    @Override
    public void onAttach(Activity activity) {
       super.onAttach(activity);
       try {
          mCallback = (OnFragment1ActiontListener) activity;
       } catch (ClassCastException e) {
          throw new ClassCastException(activity.toString()
                + " must implement OnFragment1ActiontListener");
       }
    }

    // call this method when you click button
   public void onButtonClicked() {
      mCallback.onSwitchToFragment2();
   }
}

在您的活动中，实施界面OnFragment1ActiontListener。您需要@Override以下方法

@Override
public void onSwitchToFragment2() {
   // use fragmentholder to change to fragment2
  Fragment2 fragment = new Fragment2();
  FragmentTransaction trs = getSupportFragmentManager().beginTransaction();
  trs.replace(R.id.fragmentholder, fragment);
  trs.commit();
}

希望有所帮助！

Answer 2

// Create new fragment
Fragment newFragment = new NewFragment();

// Open transaction
FragmentTransaction transaction = getFragmentManager().beginTransaction();

// Replace and add the transaction to the back stack if needed
transaction.replace(R.id.fragment_container, newFragment);
transaction.addToBackStack(null);

// Commit the transaction
transaction.commit();

单击该片段中的n按钮时如何替换片段？

2 个答案: