ContentProviderでUnknown authorityで困った話

ContentProviderを使ってデータを取得しようとしてエラーに引っかかってしまい時間をとられた

    java.lang.IllegalArgumentException: Unknown authority com.sample.content.provider.testprovider
        at android.content.ContentResolver.call(ContentResolver.java:2402)
        at com.sample.content.client.MainActivity.loadText(MainActivity.kt:27)
        at com.sample.content.client.MainActivity.onCreate$lambda-0(MainActivity.kt:17)
        at com.sample.content.client.MainActivity.lambda$9zIV18Q6InENemqclwLnyzJ6Kg8(Unknown Source:0)
        at com.sample.content.client.-$$Lambda$MainActivity$9zIV18Q6InENemqclwLnyzJ6Kg8.onClick(Unknown Source:2)
        at android.view.View.performClick(View.java:7448)
        at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
        at android.view.View.performClickInternal(View.java:7425)
        at android.view.View.access$3600(View.java:810)
        at android.view.View$PerformClick.run(View.java:28305)
        at android.os.Handler.handleCallback(Handler.java:938)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7710)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1093)

呼び出す側のアプリのAndroidManifest.xmlで使用するアプリのパッケージ名(ContentProviderのauthorityではない)を明記しておく必要があった

AndroidManifest.xml

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

    <queries>
        <package android:name="com.sample.content.provider" />
    </queries>

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

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

</manifest>

この記事によるとAndroid11で発生する模様
https://www.jianshu.com/p/631148c98ac2