Unable to deep link into Android app #75261
Description
Deep linking into an android app using the Router widget throws an error:
E/AndroidRuntime( 8741): java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.isEmpty()' on a null object reference
Steps to Reproduce
- Create a new Flutter project with
main.dartreplaced with the contents of this sample - Update
main/AndroidManifest.xmlwith this configuration inside the<activity android:name=".MainActivity">XML node:
<!-- Deep linking -->
<meta-data android:name="flutter_deeplinking_enabled" android:value="true" />
<intent-filter android:autoVerify="true">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="http" android:host="flutterbooksample.com" />
<data android:scheme="https" />
</intent-filter>
- Run this the app
- Run this command to trigger a deep link into the app:
adb shell am start -a android.intent.action.VIEW \
-c android.intent.category.BROWSABLE \
-d "http://flutterbooksample.com/book/1"
- Observe error (see below)
Logs
Logs
D/AndroidRuntime( 8741): Shutting down VM
E/AndroidRuntime( 8741): FATAL EXCEPTION: main
E/AndroidRuntime( 8741): Process: com.example.router_app, PID: 8741
E/AndroidRuntime( 8741): java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.isEmpty()' on a null object reference
E/AndroidRuntime( 8741): at io.flutter.embedding.android.FlutterActivityAndFragmentDelegate.maybeGetInitialRouteFromIntent(FlutterActivityAndFragmentDelegate.java:403)
E/AndroidRuntime( 8741): at io.flutter.embedding.android.FlutterActivityAndFragmentDelegate.onNewIntent(FlutterActivityAndFragmentDelegate.java:648)
E/AndroidRuntime( 8741): at io.flutter.embedding.android.FlutterActivity.onNewIntent(FlutterActivity.java:625)
E/AndroidRuntime( 8741): at android.app.Activity.performNewIntent(Activity.java:8015)
E/AndroidRuntime( 8741): at android.app.Instrumentation.callActivityOnNewIntent(Instrumentation.java:1409)
E/AndroidRuntime( 8741): at android.app.Instrumentation.callActivityOnNewIntent(Instrumentation.java:1422)
E/AndroidRuntime( 8741): at android.app.ActivityThread.deliverNewIntents(ActivityThread.java:3664)
E/AndroidRuntime( 8741): at android.app.ActivityThread.handleNewIntent(ActivityThread.java:3676)
E/AndroidRuntime( 8741): at android.app.servertransaction.NewIntentItem.execute(NewIntentItem.java:53)
E/AndroidRuntime( 8741): at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
E/AndroidRuntime( 8741): at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
E/AndroidRuntime( 8741): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
E/AndroidRuntime( 8741): at android.os.Handler.dispatchMessage(Handler.java:106)
E/AndroidRuntime( 8741): at android.os.Looper.loop(Looper.java:223)
E/AndroidRuntime( 8741): at android.app.ActivityThread.main(ActivityThread.java:7656)
E/AndroidRuntime( 8741): at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime( 8741): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
E/AndroidRuntime( 8741): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
I/Process ( 8741): Sending signal. PID: 8741 SIG: 9
Lost connection to device.
flutter doctor -v
[✓] Flutter (Channel master, 1.26.0-18.0.pre.133, on macOS 11.1 20C69 darwin-x64, locale en)
• Flutter version 1.26.0-18.0.pre.133 at /Users/ryjohn/code/sdks/flutter
• Framework revision 5b6444f317 (64 minutes ago), 2021-02-02 09:34:01 -0800
• Engine revision 8a01ce59bf
• Dart version 2.12.0 (build 2.12.0-281.0.dev)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
• Android SDK at /Users/ryjohn/Library/Android/sdk
• Platform android-30, build-tools 30.0.3
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 12.4, Build version 12D4e
• CocoaPods version 1.10.1
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 4.1)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)
[✓] IntelliJ IDEA Ultimate Edition (version 2020.3.2)
• IntelliJ at /Applications/IntelliJ IDEA.app
• Flutter plugin version 53.0.5
• Dart plugin version 203.6912
[✓] Connected device (3 available)
• sdk gphone x86 arm (mobile) • emulator-5554 • android-x86 • Android 11
(API 30) (emulator)
• iPhone 12 Pro Max (mobile) • AE85D456-A89C-4104-B6F0-F68F35A93165 • ios •
com.apple.CoreSimulator.SimRuntime.iOS-14-4 (simulator)
• Chrome (web) • chrome • web-javascript • Google
Chrome 88.0.4324.96
• No issues found!