Error inflating class com.google.vrtoolkit.cardboard.CardboardView crashes application

Question

its has no build error, but crashing when i running on emulator.

--------- beginning of crash E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.myrajawali, PID: 6166 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myrajawali/com.example.myrajawali.MainActivity}: android.view.InflateException: Binary XML file line #9 in com.example.myrajawali:layout/activity_main: Binary XML file line #9 in com.example.myrajawali:layout/activity_main: Error inflating class com.google.vrtoolkit.cardboard.CardboardView at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016) at android.os.Handler.dispatchMessage(Handler.java:107) at android.os.Looper.loop(Looper.java:214) at android.app.ActivityThread.main(ActivityThread.java:7356) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930) Caused by: android.view.InflateException: Binary XML file line #9 in com.example.myrajawali:layout/activity_main: Binary XML file line #9 in com.example.myrajawali:layout/activity_main: Error inflating class com.google.vrtoolkit.cardboard.CardboardView Caused by: android.view.InflateException: Binary XML file line #9 in com.example.myrajawali:layout/activity_main: Error inflating class com.google.vrtoolkit.cardboard.CardboardView Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Constructor.newInstance0(Native Method) at java.lang.reflect.Constructor.newInstance(Constructor.java:343) at android.view.LayoutInflater.createView(LayoutInflater.java:854) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:1006) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:961) at android.view.LayoutInflater.rInflate(LayoutInflater.java:1123) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1084) at android.view.LayoutInflater.inflate(LayoutInflater.java:682) at android.view.LayoutInflater.inflate(LayoutInflater.java:534) at android.view.LayoutInflater.inflate(LayoutInflater.java:481) at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:438) at android.app.Activity.setContentView(Activity.java:3324) at com.example.myrajawali.MainActivity.onCreate(MainActivity.java:23) at android.app.Activity.performCreate(Activity.java:7802) at android.app.Activity.performCreate(Activity.java:7791) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.myrajawali">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity" android:screenOrientation="landscape">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
                <category android:name="com.google.intent.category.CARDBOARD" />
            </intent-filter>
        </activity>
    </application>

</manifest>

mainActivity

<RelativeLayout
    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"
    android:background="@android:color/black"
    tools:context=".MainActivity">

    <com.google.vrtoolkit.cardboard.CardboardView
        android:id="@+id/cardboard_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</RelativeLayout>

MainActivity.java

    package com.example.myrajawali;



import android.media.MediaPlayer;
import android.os.Bundle;
import android.util.Log;


import com.google.vrtoolkit.cardboard.CardboardActivity;
import com.google.vrtoolkit.cardboard.CardboardView;



public class MainActivity extends CardboardActivity {

    private CardboardView cardboardView;
    private MediaPlayer mediaPlayer;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        cardboardView = findViewById(R.id.cardboard_view);

        // init media player for video
        mediaPlayer = MediaPlayer.create(this, R.raw.sample);
        Log.d("AAAA","aaaaaaaaaaaaaaaaaaaaaaaa");
        mediaPlayer.setLooping(true);

        //create renderee

        CardboardView.StereoRenderer renderer = new Vediorenderer(this, mediaPlayer);
        // associate a renderer with cardboardView
        cardboardView.setRenderer(renderer);

        // associate the cardboardView with this activity
        setCardboardView(cardboardView);

    }

    @Override
    public void onCardboardTrigger() {
        super.onCardboardTrigger();

        // toggle vr mode on touch/trigger
        cardboardView.setVRModeEnabled(!cardboardView.getVRMode());
    }

    @Override
    protected void onPause() {
        super.onPause();
        if (mediaPlayer != null) {
            mediaPlayer.pause();
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (mediaPlayer != null) {
            mediaPlayer.start();
        }
    }



}

VedioRenderer.java

package com.example.myrajawali;

import android.content.Context;
import android.graphics.SurfaceTexture;
import android.media.MediaPlayer;
import android.view.MotionEvent;

import com.google.vrtoolkit.cardboard.CardboardView;
import com.google.vrtoolkit.cardboard.Eye;
import com.google.vrtoolkit.cardboard.FieldOfView;
import com.google.vrtoolkit.cardboard.HeadTransform;
import com.google.vrtoolkit.cardboard.Viewport;

import org.rajawali3d.cameras.Camera;
import org.rajawali3d.materials.Material;
import org.rajawali3d.math.Matrix4;
import org.rajawali3d.math.Quaternion;
import org.rajawali3d.math.vector.Vector3;
import org.rajawali3d.primitives.Sphere;
import org.rajawali3d.renderer.Renderer;

import javax.microedition.khronos.egl.EGLConfig;

import c.org.rajawali3d.textures.StreamingTexture;
 //import rajawali.renderer.RajawaliRenderer;



public class Vediorenderer extends Renderer implements CardboardView.StereoRenderer {
    // video stuff
    private MediaPlayer mediaPlayer;
    private StreamingTexture videoTexture;

    // temporary math variables
    /** position and rotation of eye camera in 3d space as matrix object */
    private Matrix4 eyeMatrix;
    /** rotation of eye camera in 3d space */
    private Quaternion eyeOrientation;
    /** position of eye camera in 3d space */
    private Vector3 eyePosition;


    /**
     * @param context      e.g. an activity
     * @param mediaPlayer  Fully initialized media player instance with loaded video.
     *                     Make sure to call play/pause by yourself.
     */
    public  Vediorenderer(Context context, MediaPlayer mediaPlayer){
        super(context);
        this.mediaPlayer = mediaPlayer;
        // init math stuff
        eyeMatrix = new Matrix4();
        eyeOrientation = new Quaternion();
    }

    /*========================================================
     Override Renderer abstract methods
     =========================================================*/

    @Override
    protected void initScene() {
        // setup world sphere
        Sphere sphere = new Sphere(1, 24, 24);
        sphere.setPosition(0, 0, 0);
        // invert the sphere normals
        // factor "1" is two small and result in rendering glitches
        sphere.setScaleX(100);
        sphere.setScaleY(100);
        sphere.setScaleZ(-100);
        // create texture from media player video
        videoTexture = new StreamingTexture("video", this.mediaPlayer);
        // set material with video texture
        Material material = new Material();
        material.setColorInfluence(0f);
        try {
            material.addTexture(videoTexture);
        } catch (Exception e){
            throw new RuntimeException(e);
        }
        sphere.setMaterial(material);

        // add sphere to scene
        getCurrentScene().addChild(sphere);
    }
    @Override
    public void onRenderSurfaceDestroyed(SurfaceTexture surfaceTexture) {
        super.onRenderSurfaceDestroyed(surfaceTexture);
        mediaPlayer.stop();
        mediaPlayer.release();
    }
    @Override
    public void onOffsetsChanged(float xOffset, float yOffset, float xOffsetStep, float yOffsetStep, int xPixelOffset, int yPixelOffset) {

    }

    @Override
    public void onTouchEvent(MotionEvent event) {

    }

    /*========================================================
     Override CarboardView abstract methods
     =========================================================*/



    @Override
    public void onNewFrame(HeadTransform headTransform) {

    }

    @Override
    public void onDrawEye(Eye eye) {
        // Rajawali camera
        Camera currentCamera = getCurrentCamera();

        // cardboard field of view
        FieldOfView fov = eye.getFov();

        // update Rajawali camera from cardboard sdk
        currentCamera.updatePerspective(fov.getLeft(), fov.getRight(), fov.getBottom(), fov.getTop());
        eyeMatrix.setAll(eye.getEyeView());
        // orientation
        eyeOrientation.fromMatrix(eyeMatrix);
        currentCamera.setOrientation(eyeOrientation);
        // position
        eyePosition = eyeMatrix.getTranslation().inverse();
        currentCamera.setPosition(eyePosition);

        // render with Rajawali
        super.onRenderFrame(null);
    }

    @Override
    public void onFinishFrame(Viewport viewport) {

    }

    @Override
    public void onSurfaceChanged(int width, int height) {
        // tell Rajawali that cardboard sdk detected a size change
        super.onRenderSurfaceSizeChanged(null, width, height);
    }


    @Override
    public void onSurfaceCreated(EGLConfig eglConfig) {
        // pass opengl config to Rajawali
        super.onRenderSurfaceCreated(eglConfig, null, -1, -1);
    }

    @Override
    public void onRendererShutdown() {
        // tell Rajawali about shutdown
        super.onRenderSurfaceDestroyed(null);
    }
    @Override
    protected void onRender(long elapsedRealTime, double deltaTime) {
        super.onRender(elapsedRealTime, deltaTime);

        if (videoTexture != null) {
            // update texture from video content
            videoTexture.update();
        }
    }

}

Answer 1

android.view.InflateException

This error occurs when there is any issue in your XML layout file. The error is occurring on Line#9 of your activity_main, where you are using CardboardView of com.google.vrtoolkit.cardboard.CardboardView.

Possibility of error that XML layout is not inflating properly to view. You have to check the library is added properly or not in build.gradle.

Also, do Clean Project and Rebuild Project.