target API 31

API 31 requires intents to set android:exported true or false

Signed-off-by: June <zanthed@riseup.net>

app/build.gradle

@@ -8,7 +8,7 @@ android {
     defaultConfig {
         applicationId "org.grapheneos.pdfviewer"
         minSdkVersion 26
-        targetSdkVersion 30
+        targetSdkVersion 31
         versionCode 6
         versionName versionCode.toString()
         resConfigs "en"

app/src/main/AndroidManifest.xml

@@ -8,7 +8,8 @@
             android:theme="@style/AppTheme"
             android:allowBackup="true">
         <activity android:name=".PdfViewer"
-                android:label="@string/app_name">
+                android:label="@string/app_name"
+                android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />