ARCore-从Modelrenderable列表中选择其他3D对象

Question

我正在制作一个与IKEA Place应用程序非常相似的应用程序。首先，所有产品将从第一个活动的ListView中列出。当您单击某个产品时，该产品的所有信息将显示在CardView表单的新活动中。下面将有“预览”和“添加到购物车”按钮，这将带您进行下一步，可以将产品作为真实的3D对象在AR中预览，也可以将产品直接添加到购物车并转到付款步骤。现在，我面临的问题是，每个产品都将具有自己的3D对象预览，但是它们始终在AR中显示相同的3D对象。当您要在AR中预览不同的人物时，我应该怎么做才能让应用知道何时选择相应的对象？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;

  

这是与每种产品相对应的3d对象列表。

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) -> {

  

我只能在AR中渲染此文件。

        //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/编译日志中的输出或警告，如果失败，请检查所有访问修饰符，并确保在新模型出现之前不会将焦点留在私有空间中公开课。