ARCore使用

一. 配置您项目的 build.gradle 文件,相关AR项目引用

官网地址
官网demo地址

1.确保您项目的 build.gradle 包括 Google 的 Maven 代码库：

allprojects {
    repositories {
        google()
        jcenter()
    }
}

2.更新您应用的 build.gradle 以添加最新的 ARCore 和 Sceneform 用户体验依赖项，确保您的项目设置与两个库都兼容。

android {
    …
    defaultConfig {
        // Sceneform requires minSdkVersion >= 24.
        minSdkVersion 24
        …
    }
    // Sceneform libraries use language constructs from Java 8.
    // Add these compile options if targeting minSdkVersion < 26.
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {
    …
    // Provides ARCore Session and related resources.
    implementation 'com.google.ar:core:1.5.0'

    // Provides ArFragment, and other UX resources.
    implementation 'com.google.ar.sceneform.ux:sceneform-ux:1.5.0'

    // Alternatively, use ArSceneView without the UX dependency.
    implementation 'com.google.ar.sceneform:core:1.5.0'
}

3.更新您的 AndroidManifest.xml

修改您的 AndroidManifest.xml 来指示您的应用使用（AR 可选）或需要（AR 必备）ARCore 和摄像头访问权限：

    …
    
    

二. Android Studio中预览3D模型文件 官网说明

1.安装 Google Sceneform Tools (Beta) 插件

在 Android Studio 中，打开 Plugins 设置：

Windows：File > Settings > Plugins > Browse Repositories
macOS：Android Studio > Preferences > Plugins
然后点击 Browse repositories 并安装 Google Sceneform Tools (Beta)。

image.png

2.导入3D asset, 添加Sampledata文件(已经有,可以不再新建)

image.png

3.copy模型文件到sampledata中,如果没有模型文件, 可下载官网demo官网demo地址

4.选择.obj文件导入模型在Android studio中查看

image.png

image.png

更新您的应用的 build.gradle 文件，为新导入的 asset 添加一个 apply plugin 行和一个 sceneform.asset() 条目：

apply plugin: 'com.google.ar.sceneform.plugin'
//导入成功后,下面代码会自动生成
sceneform.asset('sampledata/models/andy.obj', // 'Source Asset Path' specified during import.
        'default',                            // 'Material Path' specified during import.
        'sampledata/models/andy.sfa',         // '.sfa Output Path' specified during import.
        'src/main/res/raw/andy')              // '.sfb Output Path' specified during import.

4.检查是否支持ARCore,并且检查权限

//检查是否支持ARCore
 /**
   * Returns false and displays an error message if Sceneform can not run, true if Sceneform can run
   * on this device.
   *
   * 
Sceneform requires Android N on the device as well as OpenGL 3.0 capabilities.
   *
   * 
Finishes the activity if Sceneform can not run
   */
  public static boolean checkIsSupportedDeviceOrFinish(final Activity activity) {
    if (Build.VERSION.SDK_INT < VERSION_CODES.N) {
      Log.e(TAG, "this APP requires Android N or later");
      Toast.makeText(activity, "this APP Android N or later", Toast.LENGTH_LONG).show();
      activity.finish();
      return false;
    }
    String openGlVersionString =
        ((ActivityManager) activity.getSystemService(Context.ACTIVITY_SERVICE))
            .getDeviceConfigurationInfo()
            .getGlEsVersion();
    if (Double.parseDouble(openGlVersionString) < MIN_OPENGL_VERSION) {
      Log.e(TAG, "Sceneform requires OpenGL ES 3.0 later");
      Toast.makeText(activity, "Sceneform requires OpenGL ES 3.0 or later", Toast.LENGTH_LONG)
          .show();
      activity.finish();
      return false;
    }
    return true;
  }

//检查申请权限
 public static final int PERMISSION_REQUESTCODE = 0;
    public static void checkPermissions(final Activity activity) {
        List needRequestPermissionList = findDeniedPermissions(activity,needPermissions);
        if (needRequestPermissionList != null
                && needRequestPermissionList.size() > 0) {
            String[] array = needRequestPermissionList.toArray(new String[needRequestPermissionList.size()]);
            activity.requestPermissions(array, PERMISSION_REQUESTCODE);
        }
    }

    public static List findDeniedPermissions(final Activity activity,String[] permissions) {
        List needRequestPermissionList = new ArrayList();
        try {
            for (String perm : permissions) {
                Method checkSelfMethod = activity.getClass().getMethod("checkSelfPermission", String.class);
                Method shouldShowRequestPermissionRationaleMethod = activity.getClass().getMethod("shouldShowRequestPermissionRationale",
                        String.class);
                if ((Integer)checkSelfMethod.invoke(activity, perm) != PackageManager.PERMISSION_GRANTED
                        || (Boolean)shouldShowRequestPermissionRationaleMethod.invoke(activity, perm)) {
                    needRequestPermissionList.add(perm);
                }
            }
        } catch (Throwable e) {

        }
        return needRequestPermissionList;
    }

三. 代码部分

1.xml文件部分

2.java代码部分

private ArFragment fragment;
private ModelRenderable andyRenderable;

fragment = (ArFragment) getSupportFragmentManager().findFragmentById(R.id.ux_fragment);

//初始化模型文件
ModelRenderable.builder()
                .setSource(this, Uri.parse("andy.sfb"))  //加载模型资源
                .build()
                .thenAccept(renderable -> andyRenderable = renderable)
                .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;
                        });

        fragment.setOnTapArPlaneListener(
                (HitResult hitResult, Plane plane, MotionEvent motionEvent) -> {
                    if (andyRenderable == null) {
                        return;
                    }

                    // Create the Anchor. 创建定位点
                    Anchor anchor = hitResult.createAnchor();
                    AnchorNode anchorNode = new AnchorNode(anchor);
                    anchorNode.setParent(fragment.getArSceneView().getScene());

                    // Create the transformable andy and add it to the anchor.
                    TransformableNode andy = new TransformableNode(fragment.getTransformationSystem());
                    andy.setParent(anchorNode);
                    andy.setRenderable(andyRenderable);
                    andy.select();
                });