Android 部分持久保存的InstanceState

Question

我有一个 android 片段，它只在方向改变时恢复类对象的最后一部分。我的代码如下：

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    if (getArguments().containsKey(ARG_ITEM_ID)) {
        // Load the weapon content specified by the fragment
        mWeapon = EquipmentContent.WEAPON_MAP.get(getArguments().getString(ARG_ITEM_ID));
    }
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.main_fragment, container, false);

    // get reference to the ImageViews
    weaponImageView = (ImageView) rootView.findViewById(R.id.picture);
    groupImageView = (ImageView) rootView.findViewById(R.id.groupSymbol);
    individualImageView = (ImageView) rootView.findViewById(R.id.individualSymbol);

    // get a reference to the linear layout
    statLinearLayout = (LinearLayout) rootView.findViewById(R.id.statLinearLayout);

    if (mWeapon != null) {

        AssetManager assets = getActivity().getAssets();
        InputStream pictureStream;
        InputStream groupStream;
        InputStream individualStream;

        try
        {
           // get an InputStream to the asset representing the next picture
            pictureStream = assets.open("Pictures/" + mWeapon.picture + ".png");

            // load the asset as a Drawable and display on the ImageView
            Drawable picture = Drawable.createFromStream(pictureStream, mWeapon.picture);
            weaponImageView.setImageDrawable(picture);
        }
        catch (IOException e)
        {
            Log.e("MainFragment", "Error loading " + mWeapon.picture + ".png", e);
        }
        try
        {
            // get an InputStream to the asset representing the next picture
            groupStream = assets.open("Group/" + mWeapon.group + ".png");

            // load the asset as a Drawable and display on the ImageView
            Drawable group = Drawable.createFromStream(groupStream, mWeapon.group);
            groupImageView.setImageDrawable(group);
        }
        catch (IOException e)
        {
            Log.e("MainFragment", "Error loading " + mWeapon.group + ".png", e);
        }
        try
        {
            // get an InputStream to the asset representing the next picture
            individualStream = assets.open("Individual/" + mWeapon.individual + ".png");

            // load the asset as a Drawable and display on the ImageView
            Drawable individual = Drawable.createFromStream(individualStream, mWeapon.individual);
            individualImageView.setImageDrawable(individual);
        }
        catch (IOException e)
        {
            Log.e("MainFragment", "Error loading " + mWeapon.individual + ".png", e);
        }
        ((TextView) rootView.findViewById(R.id.item_detail)).setText(mWeapon.id); // Sets the title text of the fragment
        populateStatistics(inflater);


    }
    return rootView;
}

public void populateStatistics(LayoutInflater inflater) {
    // TODO: currently reverts all EditText views to the last input upon orientation change
    if (!mWeapon.priWeapon.equals("null")) { // if the primary weapon is not null, then inflate relevant TextViews
        TableLayout priWeaponIDTableLayout = (TableLayout) inflater.inflate(R.layout.statistics_text_view, null); // Weapon title statistic
        statLinearLayout.addView(priWeaponIDTableLayout);
        ((TextView) priWeaponIDTableLayout.findViewById(R.id.category)).setText(R.string.priWeapon);
        ((EditText) priWeaponIDTableLayout.findViewById(R.id.statistic)).setText(String.format("%s", mWeapon.priWeapon));
        TableLayout priWeaponRangeTableLayout = (TableLayout) inflater.inflate(R.layout.statistics_text_view, null); // Weapon range statistic
        statLinearLayout.addView(priWeaponRangeTableLayout);
        ((TextView) priWeaponRangeTableLayout.findViewById(R.id.category)).setText(R.string.priMaxRange);
        ((TextView) priWeaponRangeTableLayout.findViewById(R.id.category)).setTypeface(null, Typeface.NORMAL);
        ((TextView) priWeaponRangeTableLayout.findViewById(R.id.statistic)).setTypeface(null, Typeface.NORMAL);
        ((EditText) priWeaponRangeTableLayout.findViewById(R.id.statistic)).setText(String.format("%s meters", mWeapon.priMaximumRange));
        TableLayout priWeaponPenTableLayout = (TableLayout) inflater.inflate(R.layout.statistics_text_view, null); // Weapon penetration statistic
        statLinearLayout.addView(priWeaponPenTableLayout);
        ((TextView) priWeaponPenTableLayout.findViewById(R.id.category)).setText(R.string.priPen);
        ((TextView) priWeaponPenTableLayout.findViewById(R.id.category)).setTypeface(null, Typeface.NORMAL);
        ((TextView) priWeaponPenTableLayout.findViewById(R.id.statistic)).setTypeface(null, Typeface.NORMAL);
        ((EditText) priWeaponPenTableLayout.findViewById(R.id.statistic)).setText(String.format("%s mm", mWeapon.priPenetration));
    }

}

我膨胀和修改的自定义布局如下。

 <?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/tableLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:stretchColumns="*">
    <!-- Table Row 0 -->
    <TableRow
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:id="@+id/tableRow0">
        <TextView
            android:id="@+id/category"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/priWeapon" android:textColor="#000" android:textStyle="bold"
            android:layout_weight="1"
            android:gravity="left"
            android:padding="5dp"/>
        <EditText
            android:id="@+id/statistic"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/NA" android:textSize="14sp" android:textStyle="bold"
            android:gravity="center"
            android:focusable="false"
            android:layout_weight="1"
            android:cursorVisible="false"
            android:longClickable="false"/>
    </TableRow>
</TableLayout>

当方向改变时，几乎所有内容都可以正常加载，包括标题、图片 .png、组和个人 .png、武器 ID 和武器穿透统计。问题在于，由于某种原因，武器穿透统计数据取代了主要武器 ID 和最大射程。我不确定为什么。感谢您提供任何帮助。

Answer 1

我修改了我的代码并将常见的有缺陷的分母视图类型“EditText”更改为“TextView”。它现在保留了它应该保留的数据。由于某种原因 EditText savedInstanceState 不是持久的，但 TextView 是。我最初使用 EditText 是因为我使用的 Dietel 书使用它是为了提供它提供的下划线。现在我只需要创建一个自定义背景来复制该下划线并将其应用到 XML 中。