Java – Android application startup crashes – customtabs. CustomTabsSession.validateRelationship

Android application startup crashes – customtabs. CustomTabsSession.validateRelationship… here is a solution to the problem.

Android application startup crashes – customtabs. CustomTabsSession.validateRelationship

I followed a recent Google guide Trusted Web Activities My app works fine on my device and some specific emulators.

However, on some devices and emulators, such as Google Pixel 2, I crash immediately on startup.

logcat output:

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.ocdev.yu_gi_ohdatabase, PID: 5020
    java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.support.customtabs.CustomTabsSession.validateRelationship(int, android.net.Uri, android.os.Bundle)' on a null object reference
        at android.support.customtabs.TrustedWebUtils.launchAsTrustedWebActivity(TrustedWebUtils.java:134)
        at android.support.customtabs.trusted.LauncherActivity$TwaCustomTabsServiceConnection.onCustomTabsServiceConnected(LauncherActivity.java:199)
        at android.support.customtabs.CustomTabsServiceConnection.onServiceConnected(CustomTabsServiceConnection.java:44)
        at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1634)
        at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1663)
        at android.os.Handler.handleCallback(Handler.java:789)
        at android.os.Handler.dispatchMessage(Handler.java:98)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6541)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

AndroidManifest.xml:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.ocdev.yu_gi_ohdatabase">

<application
        android:allowBackup="true"
        android:icon="@mipmap/ygo_fore"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ygo_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <meta-data
            android:name="asset_statements"
            android:resource="@string/asset_statements" />
        <activity
            android:name="android.support.customtabs.trusted.LauncherActivity">

<!-- Edit android:value to change the url opened by the TWA -->
            <meta-data
                android:name="android.support.customtabs.trusted.DEFAULT_URL"
                android:value="https://db.ygoprodeck.com" />

<!-- This intent-filter adds the TWA to the Android Launcher -->
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>

<!--
              This intent-filter allows the TWA to handle Intents to open
              airhorner.com.
            -->
            <intent-filter>
                <action android:name="android.intent.action.VIEW"/>
                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.BROWSABLE"/>

<!-- Edit android:host to handle links to the target URL-->
                <data
                    android:scheme="https"
                    android:host="db.ygoprodeck.com"/>
            </intent-filter>
        </activity>
    </application>
</manifest>

Module build.gradle:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.ocdev.yu_gi_ohdatabase"
        minSdkVersion 16
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.github.GoogleChrome.custom-tabs-client:customtabs:3a71a75c9f'
    implementation 'com.android.support:support-media-compat:28.0.0'
    implementation 'com.android.support:animated-vector-drawable:28.0.0'
    implementation 'com.android.support:support-v4:28.0.0'
}

Project build.gradle:

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        google()
        jcenter()

}
    dependencies {
        classpath 'com.android.tools.build:gradle:3.3.1'

 NOTE: Do not place your application dependencies here; they belong
         in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven { url "https://jitpack.io" }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

I also > the Browserstack by Tested my publish apk on Android emulator and I get the exact same issue.
I’ve also had this issue on some of the physical devices I tested, such as the Samsung Galaxy S7 Edge, but oddly enough, I tested a different Galaxy S7 Edge and it had no issues. Based on my current testing, I’m guessing it works on 50% of the devices I’ve tested.
I’m not an inherited Android developer, so I’m trying to find the cause of this issue and why it works fine on some devices and not others.

I posted this issue on the Chromium forum and was redirected to the temporary fix listed here

In short, they are aware of the problem and want to find a permanent solution as soon as possible so that the temporary fix doesn’t take too long.

The answer given:

For the moment, you can change the last parameter to
CustomTabsClient#getPackageName here to true. This parameter is
‘ignoreDefault’ and as you can probably guess will make the package
selection ignore the user’s default. Ideally though this won’t be
necessary for long.

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