java - ARCore - 从 Modelrenderable 列表中选择不同的 3D 对象

Question

我正在制作一个与 IKEA Place 应用非常相似的应用。首先，所有产品将从第一个 Activity 中的 ListView 中列出。当您点击一个产品时，该产品的所有信息将显示在 CardView 表单中的一个新 Activity 中。下面会有“预览”和“添加到购物车”按钮，这将引导您进入下一步，或者在 AR 中预览产品作为真实的 3D 对象，或者您可以直接将产品添加到购物车并转到付款步骤。现在我面临的问题是，每个产品都有自己的 3D 对象预览，但它们总是在 AR 中显示相同的 3D 对象。当你想在AR中预览不同的产品时，如何让应用程序知道什么时候选择相应的对象？这是我的代码。

ProductFragment.java

package com.example.myar;

import android.annotation.SuppressLint;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;

import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import androidx.fragment.app.Fragment;

import com.nex3z.notificationbadge.NotificationBadge;


public class ProductFragment extends Fragment {

private NotificationBadge badge;

here is the list of my 3d Objects corresponding to each product.

private String[] names = {"name1", "name2", "name3", "name4", "name5", "name6", "name7" };
private int[] images = {R.drawable.background, R.drawable.ic_launcher_background, R.drawable.background,
        R.drawable.background, R.drawable.ic_launcher_background, R.drawable.ic_launcher_background, R.drawable.background};
private String[] description ={"123", "456", "789", "1011", "abc", "3311", "31313"};
private String[] price ={"19,00 €", "20,50 €", "35,00 €", "44,19 €", "5,79 €", "89,99 €", "1,99 €"};
private String[] object3D = {"ArcticFox_Posed.sfb", "AJ-Vase.sfb", "10432_Aloe_Plant_v1_max2008_it2.sfb","AJ-Vase.sfb",
        "AJ-Vase.sfb", "ArcticFox_Posed.sfb", "10432_Aloe_Plant_v1_max2008_it2.sfb"};

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    setHasOptionsMenu(true);

    View view = inflater.inflate(R.layout.product_fragment, container, false);
    ListView listView = view.findViewById(R.id.ItemListView);
    ProductFragment.customadapter ca = new ProductFragment.customadapter();
    listView.setOnItemClickListener((parent, view1, position, id) -> {

        String nameItemListview = names[position];
        int imageItemListview = images[position];
        String descItemListview = description[position];
        String priceItemListview = price[position];
    //    String object3DListview = object3D[position];

        Intent intent = new Intent(view1.getContext(), ProductViewActivity.class);
        intent.putExtra("item Names", nameItemListview);
        intent.putExtra("item Images", imageItemListview);
        intent.putExtra("item Desc", descItemListview);
        intent.putExtra("item Price", priceItemListview);
     //   intent.putExtra("3D Object", object3DListview);
        ProductFragment.this.startActivity(intent);
    });

    listView.setAdapter(ca);
    return view;

}

@Override
    public void onCreateOptionsMenu( Menu menu, MenuInflater inflater) {
    inflater.inflate(R.menu.menu_cart, menu);
    View view = menu.findItem(R.id.action_cart).getActionView();;
    badge = view.findViewById(R.id.badge);
    ImageView cart_icon = view.findViewById(R.id.cart_icon);
    cart_icon.setOnClickListener(v -> startActivity(new Intent (getContext(), CartActivity.class)));
    updateCartCount();
}

private void updateCartCount() {
    if(badge == null) return;
    getActivity().runOnUiThread(() -> {
        if (MainActivity.cartRepository.countItem() == 0)
            badge.setVisibility(View.VISIBLE);
        else {
            badge.setVisibility((View.VISIBLE));
            badge.setText(String.valueOf(MainActivity.cartRepository.countItem()));
        }
    });
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    if (item.getItemId() == R.id.action_cart) {
    }
    return true;
}
class customadapter extends BaseAdapter {

       @Override
    public int getCount() {
        return images.length;
    }

    @Override
    public Object getItem(int arg0) {
        return null;
    }

    @Override
    public long getItemId(int arg0) {
        return 0;
    }

    @SuppressLint({"ViewHolder", "InflateParams"})
    @Override
    public View getView(final int position, View view, ViewGroup parent) {
        view = getLayoutInflater().inflate(R.layout.layout_list_item, null);

        TextView tv = view.findViewById(R.id.item_name);
        ImageView image = view.findViewById(R.id.item_image);
        TextView pv = view.findViewById(R.id.item_price);

        tv.setText(names[position]);
        image.setImageResource(images[position]);
        pv.setText(price[position]);

        return view;
    }
}

@Override
public void onResume() {
    super.onResume();
    updateCartCount();
}
}

ProductViewActivity.java

package com.example.myar;

import android.content.Intent;
import android.os.Bundle;

import android.util.Log;
import android.view.MenuItem;

import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.Toolbar;


import androidx.core.content.ContextCompat;
import androidx.fragment.app.FragmentActivity;

import com.example.myar.RoomDatabase.ModelDB.Cart;
import com.google.gson.*;


public class ProductViewActivity extends FragmentActivity {
    Toolbar productToolbar;
    ImageView productImage;
    TextView productName;
    TextView productDesc;
    TextView productPrice;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_productview);

    productToolbar = findViewById(R.id.toolbarTop);
    productImage = findViewById(R.id.product_image);
    productName = findViewById(R.id.product_name);
    productDesc = findViewById(R.id.product_description);
    productPrice = findViewById(R.id.product_price);

    String nameHolder = getIntent().getStringExtra("item Names");
    productName.setText(nameHolder);

    int imageHolder = getIntent().getIntExtra("item Images", -1);
    productImage.setImageResource(imageHolder);

    String descHolder = getIntent().getStringExtra("item Desc");
    productDesc.setText(descHolder);

    String priceHolder = getIntent().getStringExtra("item Price");
    productPrice.setText(priceHolder);

    productToolbar.setTitle("Detail");
    setActionBar(productToolbar);
    getWindow().setStatusBarColor(ContextCompat.getColor(ProductViewActivity.this, R.color.colorProductBackground));

    //backButton as arrow
    if (getActionBar() != null) {
        getActionBar().setDisplayHomeAsUpEnabled(true);
        getActionBar().setDisplayShowHomeEnabled(true);
    }

    Button previewButton = findViewById(R.id.previewButton);
    previewButton.setOnClickListener(view -> openPreview());

    Button addToCartButton = findViewById(R.id.addToCartButton);
    addToCartButton.setOnClickListener(view -> addToCartActivity());
}
//click on Arrow to go back to last Activity
@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // handle arrow click here
    if (item.getItemId() == android.R.id.home) {
        finish(); // close this activity and return to preview activity (if there is any)
    }
    return super.onOptionsItemSelected(item);
}
public void openPreview (){

    Intent intent = new Intent(this, ArFragmentPreview.class);
    startActivity(intent);
}

public void addToCartActivity (){

    try {
        Cart cartItem = new Cart();
        cartItem.name = productName.getText().toString();
        cartItem.description = productDesc.getText().toString();
        cartItem.price = productPrice.getText().toString();

        MainActivity.cartRepository.insertToCart(cartItem);
        Log.d("MyAR", new Gson().toJson(cartItem));
        Toast.makeText(this, "Save Item to Cart successful", Toast.LENGTH_SHORT).show();
    }
    catch (Exception ex)
    {
        Toast.makeText(this, ex.getMessage(), Toast.LENGTH_SHORT).show();
    }

}

}

ArFragmentPreview

package com.example.myar;

import android.net.Uri;
import android.os.Bundle;
import android.view.Gravity;
import android.view.MotionEvent;
import android.widget.Button;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import com.google.ar.sceneform.collision.Box;
import com.google.ar.sceneform.ux.ArFragment;
import com.google.ar.core.Anchor;
import com.google.ar.core.HitResult;
import com.google.ar.core.Plane;
import com.google.ar.sceneform.AnchorNode;
import com.google.ar.sceneform.Camera;
import com.google.ar.sceneform.Node;
import com.google.ar.sceneform.Sun;
import com.google.ar.sceneform.math.Quaternion;
import com.google.ar.sceneform.math.Vector3;
import com.google.ar.sceneform.rendering.ModelRenderable;
import com.google.ar.sceneform.ux.TransformableNode;

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

public class ArFragmentPreview extends AppCompatActivity {

private ArFragment arFragment;
public Plane.Type planeType;
ModelRenderable Fox, Vase, Plant;

@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_arpreview_layout);
    arFragment = (ArFragment)getSupportFragmentManager().findFragmentById(R.id.arFragment);
    arFragment.setOnTapArPlaneListener((HitResult hitResult, Plane plane, MotionEvent motionEvent) -> {

I can only render this file in AR.

        //Renderable mode in AR app
        ModelRenderable.builder()
                .setSource(this, Uri.parse("ArcticFox_Posed.sfb"))
                .build()
                .thenAccept(modelRenderable -> addModelToScene(modelRenderable, hitResult, planeType))
                .exceptionally(throwable -> {
                    Toast toast = Toast.makeText(this, "Unable to load andy renderable", Toast.LENGTH_LONG);
                    toast.setGravity(Gravity.CENTER, 0, 0);
                    toast.show();
                    return null;
                });

    Button backButton = findViewById(R.id.backButton);
    backButton.setOnClickListener(v -> this.finish());

    Button clearButton = findViewById(R.id.clearButton);
    clearButton.setOnClickListener(view -> onClear());

}

private void addModelToScene(ModelRenderable modelRenderable, HitResult hitResult, Plane.Type planeType) {
    Anchor anchor = hitResult.createAnchor();
    AnchorNode anchorNode = new AnchorNode(anchor);
    anchorNode.setParent(arFragment.getArSceneView().getScene());

    Vector3 size = ((Box) modelRenderable.getCollisionShape()).getSize();

    TransformableNode transformableNode = new TransformableNode(arFragment.getTransformationSystem());
    transformableNode.setParent(anchorNode);
    arFragment.getArSceneView().getScene().addChild(anchorNode);

    if (planeType == Plane.Type.HORIZONTAL_DOWNWARD_FACING) {
        transformableNode.setParent(transformableNode);
        transformableNode.setLocalPosition(new Vector3(0, size.y, 0));
        transformableNode.setLocalRotation(new Quaternion(0, 0, 1, 0));
        transformableNode.setRenderable(modelRenderable);
        transformableNode.select();
    } else if (planeType == Plane.Type.VERTICAL) {
        transformableNode.setParent(transformableNode);
        //transformableNode.setLookDirection(new Vector3(0,0,0));
        transformableNode.setRenderable(modelRenderable);
        transformableNode.select();
    } else {
        transformableNode.setRenderable(modelRenderable);
        transformableNode.select();
    }
}

private void onClear() {
    List<Node> children = new ArrayList<>(arFragment.getArSceneView().getScene().getChildren());
    for (Node node : children) {
        if (node instanceof AnchorNode) {
            if (((AnchorNode) node).getAnchor() != null) {
                Objects.requireNonNull(((AnchorNode) node).getAnchor()).detach();
            }
        }
        if (!(node instanceof Camera) && !(node instanceof Sun)) {
            node.setParent(null);
        }
    }
}

}

Answer 1

您可以尝试在 JMonkey 中打开项目并检查调试器/编译日志的输出或警告，如果失败则检查所有访问修饰符并确保在新模型出现之前焦点不会留在私有(private)中来自公共(public)类(class)的类(class)。