Question

我在Tabbed Activity中有一个片段，当单击一个按钮时会创建新视图，问题是当创建视图并使用不同的信息填充信息时，我会滑动到另一个片段然后返回现在，使用按钮单击创建的所有视图都包含相同的信息。

在片段中：

@Override
public View onCreateView(final LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    if(view == null) {
        view = inflater.inflate(R.layout.fragment_create_history, container, false);
    }
    Button addHistoryButton = (Button) view.findViewById(R.id.buttonAddHistory);

    inflaterM = LayoutInflater.from(view.getContext());
    root = (LinearLayout) view.findViewById(R.id.linearLayoutHistory);
    mListener.onFragmentHistoryInteractionLoad();

    addHistoryButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            View child = inflater.inflate(R.layout.list_history_layout, null);
            child.setId(View.generateViewId());
            root.addView(child);
        }


    });

    return view;
  }

R.layout.list_history_layout：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="5dp"
android:layout_marginTop="5dp"
android:id="@+id/linearLayoutHistory">

<View
    android:layout_width="fill_parent"
    android:layout_height="1dp"
    android:background="@android:color/darker_gray"/>

<EditText
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/editTextStory"
    android:hint="Story"
    />
<EditText
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/editTextYearRecorded"
    android:hint="Year Recorded"
    android:inputType="date"
    />
</LinearLayout>

Answer 1

您需要在片段上创建可在视图上发生更改时设置的属性，例如：

private boolean mHistoryButtonAdded;

...

    @Override
    public void onClick(View v) {
        View child = inflater.inflate(R.layout.list_history_layout, null);
        child.setId(View.generateViewId());
        root.addView(child);
        mHistoryButtonAdded = true;
    }

接下来，您需要覆盖onSaveInstanceState()以保留这些属性，例如：

@Override
public void onSaveInstanceState(Bundle outState) {
    outState.putBoolean("history-button-added", mHistoryButtonAdded);
    super.onSaveInstanceState(outState);

然后，在onCreateView()中，您将检查这些属性并从其状态重新创建视图，例如：

if (savedInstanceState != null) {
    mHistoryButtonAdded = savedInstanceState.getBoolean("history-button-added", false);
    if (mHistoryButtonAdded) {
        View child = inflater.inflate(R.layout.list_history_layout, null);
        child.setId(View.generateViewId());
        root.addView(child);
    }
}

另外请确保使用FragmentStatePagerAdapter，这将保存并恢复状态。

动态视图无法保持输入

1 个答案: