android - DataBinding Binder 不适用于具有不同限定符的 2 个相同布局

Question

我有 2 个布局文件。一个是默认的，另一个是 sw720dp。显然，它们共享相同的模型:

<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:fresco="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">

<data>

    <import type="java.lang.String" />

    <variable
        name="product"
        type="com.test.test.test.test.Product" />
</data>

<ScrollView
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/white"
        android:orientation="vertical"
        tools:context="com.test.test.test.test.ProductDetailsFragment">

        <RelativeLayout
            android:id="@+id/ll_custome_action_bar"
            android:layout_width="match_parent"
            android:layout_height="56dp"
            android:background="@color/light_blue_900"
            android:orientation="horizontal">

            <TextView
                android:id="@+id/tv_back_button"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:layout_alignParentLeft="true"
                android:layout_alignParentStart="true"
                android:gravity="center_vertical"
                android:padding="16dp"
                android:text="@string/fa_arrow_left"
                android:textColor="@color/white"
                android:textSize="22sp" />

            <TextView
                android:id="@+id/tv_product_name"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:ellipsize="end"
                android:gravity="center"
                android:maxLines="1"
                android:paddingLeft="46dp"
                android:paddingRight="46dp"
                android:text="@{product.name}"
                android:textColor="@color/white"
                android:textSize="18sp" />
        </RelativeLayout>

        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/vp_product_images"
            android:layout_width="match_parent"
            android:layout_height="150dp"
            android:layout_below="@+id/ll_custome_action_bar"
            fresco:actualImageScaleType="centerCrop"
            fresco:placeholderImage="@drawable/placeholder2" />

        <Button
            android:id="@+id/btn_add_to_card"
            android:layout_width="232dp"
            android:layout_height="wrap_content"
            android:layout_below="@+id/btn_wishlist"
            android:layout_centerHorizontal="true"
            android:layout_marginBottom="16dp"
            android:background="@drawable/selector_button_green"
            android:text="@string/add_to_cart"
            android:textColor="@color/white"
            android:textSize="16sp" />

        <Button
            android:id="@+id/btn_wishlist"
            android:layout_width="232dp"
            android:layout_height="wrap_content"
            android:layout_below="@+id/ll_price_holder"
            android:layout_centerHorizontal="true"
            android:layout_marginBottom="16dp"
            android:layout_marginLeft="16dp"
            android:layout_marginRight="16dp"
            android:background="@drawable/selector_button_red"
            android:text="@string/wishlist"
            android:textColor="@color/white"
            android:textSize="16sp" />

        <LinearLayout
            android:id="@+id/ll_product_info_holder"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/ll_product_images"
            android:layout_marginLeft="16dp"
            android:layout_marginRight="16dp"
            android:layout_marginTop="5dp"
            android:background="@drawable/drawable_border"
            android:orientation="vertical">

            <TextView
                android:id="@+id/tv_product_description_title"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/light_blue_900"
                android:gravity="center"
                android:padding="3dp"
                android:text="@string/description"
                android:textColor="@color/white"
                android:textSize="16sp" />

            <TextView
                android:id="@+id/tv_product_description_value"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="16dp"
                android:text="@{product.description}"
                android:textColor="@color/gray_800"
                android:textSize="12sp" />
        </LinearLayout>

        <LinearLayout
            android:id="@+id/ll_price_holder"
            android:layout_width="264dp"
            android:layout_height="wrap_content"
            android:layout_below="@+id/ll_product_info_holder"
            android:layout_centerHorizontal="true"
            android:gravity="center"
            android:orientation="horizontal">

            <LinearLayout
                android:id="@+id/ll_total_price_holder"
                android:layout_width="100dp"
                android:layout_height="wrap_content"
                android:layout_margin="@dimen/screen_edge_margin"
                android:background="@drawable/drawable_border"
                android:orientation="vertical">

                <TextView
                    android:id="@+id/tv_total_price_title"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@color/light_blue_900"
                    android:gravity="center"
                    android:padding="3dp"
                    android:paddingLeft="8dp"
                    android:paddingRight="8dp"
                    android:text="@string/basePrice"
                    android:textColor="@color/white"
                    android:textSize="16sp" />

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal"
                    android:padding="16dp">

                    <TextView
                        android:id="@+id/tv_total_price_value"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:gravity="center"
                        android:text="@{product.normalPrice}"
                        android:textColor="@color/gray_800"
                        android:textSize="14sp" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="@string/blank_space"
                        android:textColor="@color/white"
                        android:textSize="12sp" />

                    <TextView
                        android:id="@+id/tv_total_price_currency"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:gravity="center"
                        android:text="@{product.productionData}"
                        android:textColor="@color/gray_800"
                        android:textSize="14sp" />

                </LinearLayout>


            </LinearLayout>

            <LinearLayout
                android:id="@+id/ll_your_price_holder"
                android:layout_width="100dp"
                android:layout_height="wrap_content"
                android:layout_margin="@dimen/screen_edge_margin"
                android:layout_marginLeft="8dp"
                android:layout_marginStart="8dp"
                android:background="@drawable/drawable_border"
                android:orientation="vertical">

                <TextView
                    android:id="@+id/tv_your_price_title"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@color/light_blue_900"
                    android:gravity="center"
                    android:padding="3dp"
                    android:paddingLeft="8dp"
                    android:paddingRight="8dp"
                    android:text="@string/yourPrice"
                    android:textColor="@color/white"
                    android:textSize="16sp" />

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal"
                    android:padding="16dp">

                    <TextView
                        android:id="@+id/tv_your_price_value"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:gravity="center"
                        android:text="@{product.specialPrice}"
                        android:textColor="@color/gray_800"
                        android:textSize="14sp" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="@string/blank_space"
                        android:textColor="@color/white"
                        android:textSize="12sp" />

                    <TextView
                        android:id="@+id/tv_your_price_currency"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:gravity="center"
                        android:text="@{product.productionData}"
                        android:textColor="@color/gray_800"
                        android:textSize="14sp" />

                </LinearLayout>


            </LinearLayout>
        </LinearLayout>

        <LinearLayout
            android:id="@+id/ll_product_images"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/vp_product_images"
            android:layout_marginLeft="16dp"
            android:layout_marginRight="16dp"
            android:layout_marginTop="20dp"
            android:orientation="horizontal">

            <com.facebook.drawee.view.SimpleDraweeView
                android:id="@+id/vp_product_image_1"
                android:layout_width="100dp"
                android:layout_height="70dp"
                android:layout_margin="5dp"
                android:layout_weight="1"
                fresco:actualImageScaleType="centerCrop"
                fresco:placeholderImage="@drawable/placeholder2" />

            <com.facebook.drawee.view.SimpleDraweeView
                android:id="@+id/vp_product_image_2"
                android:layout_width="100dp"
                android:layout_height="70dp"
                android:layout_margin="5dp"
                android:layout_weight="1"
                fresco:actualImageScaleType="centerCrop"
                fresco:placeholderImage="@drawable/placeholder2" />

            <com.facebook.drawee.view.SimpleDraweeView
                android:id="@+id/vp_product_image_3"
                android:layout_width="100dp"
                android:layout_height="70dp"
                android:layout_margin="5dp"
                android:layout_weight="1"
                fresco:actualImageScaleType="centerCrop"
                fresco:placeholderImage="@drawable/placeholder2" />

        </LinearLayout>

    </RelativeLayout>
</ScrollView>

然后，在我的 fragment 中，我像这样访问 Binder

public class ProductDetailsFragment extends BaseFragment implements ProductDetailsView {

private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
public static final String ACTION_SHOW_ACTION_BAR = ProductDetailsFragment.class.getName() + ".show_action_bar";
public static final String ACTION_HIDE_ACTION_BAR = ProductDetailsFragment.class.getName() + ".hide_action_bar";
public static final String ACTION_BACK = ProductDetailsFragment.class.getName() + ".back";
public static final String ACTION_ADD_TO_CART = ProductDetailsFragment.class.getName() + ".add_to_cart";
public static final String ACTION_ADD_TO_WISHLIST = ProductDetailsFragment.class.getName() + ".add_to_wishlit";

FragmentProductDetailsBinding mBinder;
Shop mShop;
Product mProduct;
ProductDetailsPresenter mPresenter;
PreferenceAdapter mPreferenceAdapter;

public ProductDetailsFragment() {
    // Required empty public constructor
}

/**
 * Use this factory method to create a new instance of
 * this fragment using the provided parameters.
 *
 * @param product Parameter 1.
 * @return A new instance of fragment ProductDetailsFragment.
 */
public static ProductDetailsFragment newInstance(Shop shop, Product product) {
    ProductDetailsFragment fragment = new ProductDetailsFragment();
    Bundle args = new Bundle();
    args.putParcelable(ARG_PARAM1, Parcels.wrap(shop));
    args.putParcelable(ARG_PARAM2, Parcels.wrap(product));
    fragment.setArguments(args);
    return fragment;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (getArguments() != null) {
        Parcelable parcelable;
        parcelable = getArguments().getParcelable(ARG_PARAM1);
        mShop = Parcels.unwrap(parcelable);
        parcelable = getArguments().getParcelable(ARG_PARAM2);
        mProduct = Parcels.unwrap(parcelable);
    }
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    mBinder = DataBindingUtil.inflate(inflater, R.layout.fragment_product_details, container, false);
    setUIListeners();
    mPresenter = new ProductDetailsPresenterImpl(this);
    mPreferenceAdapter = new PreferenceAdapter(getContext());
    mBinder.setProduct(mProduct);
    setImages();
    setPriceVisibility();
    sendActionToActivity(ACTION_HIDE_ACTION_BAR);

    if (isUserLogged()) {
        mBinder.btnWishlist.setVisibility(View.VISIBLE);
    } else {
        mBinder.btnWishlist.setVisibility(View.GONE);
    }
    return mBinder.getRoot();
}

@Override
public void onDestroyView() {
    super.onDestroyView();
    mPresenter.cleanup();
    sendActionToActivity(ACTION_SHOW_ACTION_BAR);
}

@Override
protected void setTypeface() {
    mBinder.tvBackButton.setTypeface(FontManager.getInstance().getFontAwesome());
}

private void setUIListeners() {
    mBinder.btnAddToCard.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            sendActionToActivity(ACTION_ADD_TO_CART, mShop, mProduct);
        }
    });
    mBinder.btnWishlist.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            sendActionToActivity(ACTION_ADD_TO_WISHLIST, mShop, mProduct);

        }
    });
    mBinder.tvBackButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            sendActionToActivity(ACTION_BACK);
        }
    });
}

private void setImages() {
    String imagePathMax = mPreferenceAdapter.readImagePathMax();
    String imagePathNormal = mPreferenceAdapter.readImagePathNormal();
    String imageExtension = mPreferenceAdapter.readImageExtension();

    String input = mProduct.getId();
    input = input.replace(" ", "");

    String image = imagePathMax + input + imageExtension;
    String image_01 = imagePathNormal + input + "_01" + imageExtension;
    String image_02 = imagePathNormal + input + "_02" + imageExtension;
    final Uri imageUri = Uri.parse(image);
    final Uri image_01Uri = Uri.parse(image_01);
    final Uri image_02Uri = Uri.parse(image_02);
    mBinder.vpProductImages.setImageURI(imageUri);
    mBinder.vpProductImage1.setImageURI(imageUri);
    mBinder.vpProductImage2.setImageURI(image_01Uri);
    mBinder.vpProductImage3.setImageURI(image_02Uri);

    mBinder.vpProductImage1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mBinder.vpProductImages.setImageURI(imageUri);
        }
    });

    mBinder.vpProductImage2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mBinder.vpProductImages.setImageURI(image_01Uri);
        }
    });

    mBinder.vpProductImage3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mBinder.vpProductImages.setImageURI(image_02Uri);
        }
    });
}

private void setPriceVisibility() {
    if (mBinder.getProduct().getNormalPrice().equals(mBinder.getProduct().getSpecialPrice())) {
        mBinder.llTotalPriceHolder.setVisibility(View.VISIBLE);
        mBinder.llYourPriceHolder.setVisibility(View.GONE);
    } else {
        mBinder.llTotalPriceHolder.setVisibility(View.VISIBLE);
        mBinder.llYourPriceHolder.setVisibility(View.VISIBLE);
    }
}

@Override
public void logoutShop(Shop shop) {

}

@Override
public void showError(Error error) {

}

@Override
public void showProgress(boolean show) {

}

private void sendActionToActivity(String action) {
    if (mListener == null) {
        return;
    }
    Bundle bundle = new Bundle();
    bundle.putString(Constants.ACTION_KEY, action);
    mListener.onFragmentInteraction(bundle);
}

private void sendActionToActivity(String action, Shop shop, Product product) {
    if (mListener == null) {
        return;
    }
    Bundle bundle = new Bundle();
    bundle.putString(Constants.ACTION_KEY, action);
    bundle.putParcelable(Constants.DATA_KEY_1, Parcels.wrap(shop));
    bundle.putParcelable(Constants.DATA_KEY_2, Parcels.wrap(product));
    mListener.onFragmentInteraction(bundle);
}

public void logoutShop() {
    AsyncExecutor.create().execute(new AsyncExecutor.RunnableEx() {
        @Override
        public void run() throws Exception {
            mPresenter.logoutShop(mShop);
            ShopRepository shopRepository;
            shopRepository = new ShopRepository();
            mShop.setLoginId(-1);
            mShop.setCustomerId(-1);
            mShop.setCartNumber(0);
            mShop.setLineNumber(0);
            mShop.setCartItems(0);
            shopRepository.updateLoginNumber(mShop);
            shopRepository.updateCart(mShop);
            notifyChanges();
        }
    });
}

private boolean isUserLogged() {
    return mShop != null && mShop.getLoginId() != -1;

}

private void notifyChanges() {
    AuthShopResult event;
    event = new AuthShopResult();
    event.setShop(mShop);
    EventBus.getDefault().post(event);
}
}

但是，当我尝试在平板电脑上运行我的应用程序并希望使用其他布局时，我在 Binder 中遇到错误。

C:\ProductDetailsFragment.java Error:(179, 65) error: cannot find symbol method getProduct() Error:(179, 20) error: cannot find symbol method getProduct() Error:Execution failed for task ':app:compileDebugJavaWithJavac'. Compilation failed; see the compiler error output for details. Information:BUILD FAILED Information:Total time: 6.231 secs Information:3 errors Information:0 warnings Information:See complete output in console

getProduct() 错误可以在setPriceVisibility() 方法中找到。

据我所知，FragmentProductDetailsBinding mBinder 仅指标准布局，但 sw720dp 布局没有 Binder 。我该如何解决这个问题？

编辑:我添加了以下内容:

FragmentProductDetailsBindingSw720dpImpl mBinder720;
mBinder720 = DataBindingUtil.inflate(inflater, R.layout.fragment_product_details, container, false);
mBinder720.setProduct(mProduct);
mBinder720.getProduct().getNormalPrice().equals(mBinder720.getProduct().getSpecialPrice())

这种方式我有两个 Binder 并且它有效，但必须有更好的方式。

编辑 2: 我已将问题发布到 Android bug tracker , 如果您有任何建议，请随时指正。

Answer 1

出于某种原因，getter 未在绑定(bind)类 FragmentProductDetailsBinding 上定义，就像它是 documented :

The generated binding class will have a setter and getter for each of the described variables. The variables will take the default Java values until the setter is called — null for reference types, 0 for int, false for boolean, etc.

*Impl 类扩展此类并定义此 getter 方法，同时重写 setter。所以我认为这是数据绑定(bind)生成方面的错误。

在您的情况下，您可以通过直接使用 Fragment 中的 mProduct 来解决此问题。