Start a new topic

java.lang.NullPointerException: Attempt to invoke virtual method 'void com.wikitude.common.orientation.internal.a.a()' on a null object reference

Hi,

I am trying to develop wikitude android + javascript api application. I am following this documentation from wikitude documentation. I am facing below error while installing my apk on android device.



 

package com.example.sattarwa.poigo;

import android.app.Activity;
import android.os.Bundle;
import android.os.PersistableBundle;

import com.wikitude.architect.ArchitectStartupConfiguration;
import com.wikitude.architect.ArchitectView;

import org.jetbrains.annotations.Nullable;

public class MainActivity extends Activity {

    private ArchitectView architectView;

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

        this.architectView = (ArchitectView)this.findViewById( R.id.architectView );
        final ArchitectStartupConfiguration config = new ArchitectStartupConfiguration();
        config.setLicenseKey("" );
        this.architectView.onCreate( config );
    }

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

    @Override
    protected void onDestroy() {
        super.onDestroy();
        this.architectView.onDestroy();
    }

    @Override
    public void onPostCreate(@Nullable Bundle savedInstanceState, @Nullable PersistableBundle persistentState) {
        super.onPostCreate(savedInstanceState, persistentState);
        this.architectView.onPostCreate();
    }
}

 


 

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <com.wikitude.architect.ArchitectView android:id="@+id/architectView" android:layout_width="fill_parent" android:layout_height="fill_parent"/>


</FrameLayout>

 

 

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

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.ACCESS_GPS" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-feature android:name="android.hardware.camera" android:required="true" />
    <uses-feature android:name="android.hardware.location" android:required="true" />
    <uses-feature android:name="android.hardware.sensor.accelerometer" android:required="true" />
    <uses-feature android:name="android.hardware.sensor.compass" android:required="true" />
    <uses-feature android:glEsVersion="0x00020000" android:required="true" />

    <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:configChanges="screenSize|orientation">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

 

please help.

txt
(4.49 KB)
1 Comment

Hi, 


please make sure that you acquire camera runtime permissions before calling architectView.onCreate. The easiest way to do it is to check the permissions in a different activity and only when permissions are granted start the Activity containing the architectView.


Best Regards,

Alex

Login or Signup to post a comment