ARCore使用

一. 配置您項(xiàng)目的 build.gradle 文件,相關(guān)AR項(xiàng)目引用

官網(wǎng)地址
官網(wǎng)demo地址

1.確保您項(xiàng)目的 build.gradle 包括 Google 的 Maven 代碼庫：
allprojects {
    repositories {
        google()
        jcenter()
    }
}
2.更新您應(yīng)用的 build.gradle 以添加最新的 ARCore 和 Sceneform 用戶體驗(yàn)依賴項(xiàng)，確保您的項(xiàng)目設(shè)置與兩個庫都兼容。
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 來指示您的應(yīng)用使用（AR 可選）或需要（AR 必備）ARCore 和攝像頭訪問權(quán)限：

<!-- Both "AR Optional" and "AR Required" apps require CAMERA permission. -->
<uses-permission android:name="android.permission.CAMERA" />

<!-- Indicates that app requires ARCore ("AR Required"). Ensures app is only
     visible in the Google Play Store on devices that support ARCore.
     For "AR Optional" apps remove this line. -->
<uses-feature android:name="android.hardware.camera.ar" />

<application>
    …
    <!-- Indicates that app requires ARCore ("AR Required"). Causes Google
         Play Store to download and install ARCore along with the app.
         For an "AR Optional" app, specify "optional" instead of "required".
    -->
    <meta-data android:name="com.google.ar.core" android:value="required" />
</application>

二. Android Studio中預(yù)覽3D模型文件 官網(wǎng)說明

1.安裝 Google Sceneform Tools (Beta) 插件

在 Android Studio 中，打開 Plugins 設(shè)置：

Windows：File > Settings > Plugins > Browse Repositories
macOS：Android Studio > Preferences > Plugins
然后點(diǎn)擊 Browse repositories 并安裝 Google Sceneform Tools (Beta)。


image.png
2.導(dǎo)入3D asset, 添加Sampledata文件(已經(jīng)有,可以不再新建)
image.png
3.copy模型文件到sampledata中,如果沒有模型文件, 可下載官網(wǎng)demo官網(wǎng)demo地址
4.選擇.obj文件導(dǎo)入模型在Android studio中查看
image.png

image.png

更新您的應(yīng)用的 build.gradle 文件，為新導(dǎo)入的 asset 添加一個 apply plugin 行和一個 sceneform.asset() 條目：

apply plugin: 'com.google.ar.sceneform.plugin'
//導(dǎo)入成功后,下面代碼會自動生成
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.檢查是否支持ARCore,并且檢查權(quán)限
//檢查是否支持ARCore
 /**
   * Returns false and displays an error message if Sceneform can not run, true if Sceneform can run
   * on this device.
   *
   * <p>Sceneform requires Android N on the device as well as OpenGL 3.0 capabilities.
   *
   * <p>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;
  }

//檢查申請權(quán)限
 public static final int PERMISSION_REQUESTCODE = 0;
    public static void checkPermissions(final Activity activity) {
        List<String> 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<String> findDeniedPermissions(final Activity activity,String[] permissions) {
        List<String> needRequestPermissionList = new ArrayList<String>();
        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. 代碼部分

1.xml文件部分
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".activity.PlaneModelActvity">

   <fragment android:name="com.google.ar.sceneform.ux.ArFragment"
       android:id="@+id/ux_fragment"
       android:layout_width="match_parent"
       android:layout_height="match_parent" />

</FrameLayout>
2.java代碼部分
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"))  //加載模型資源
                .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. 創(chuàng)建定位點(diǎn)
                    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();
                });

常見問題

1. 如果點(diǎn)擊 Sample Data Directory并沒有新建出sampledata文件夾, 可以手動創(chuàng)建, 并將模型文件Copy進(jìn)去, 再進(jìn)行 Import Sceneform Asset 操作。

2.點(diǎn)擊obj/fbx文件,發(fā)現(xiàn)并沒有Import Sceneform Asset 選項(xiàng)
解決方案:
2.1 回到文章上端查看安裝 Google Sceneform Tools (Beta) 插件, 不安裝肯定是找不到Import Sceneform Asset選項(xiàng)的

image.png

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