[ANDROID] Linking.getInitialURL() returns null after exiting the app with back button and using deep linking again (only in production!)

[ferrannp]

Is this a bug report?

Yes.

Environment

1. react-native -v: 0.46.4
2. node -v: 8.4.0
3. npm -v: 5.3.0
4. yarn --version: 0.27.5

• Target Platform: Android
• Development Operating System: macOS

Steps to Reproduce

Configure your app to receive deep linking links as explained here: https://facebook.github.io/react-native/docs/linking.html.

My native code looks like:

<intent-filter>
    <action android:name="android.intent.action.VIEW" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />
    <data android:scheme="https"
          android:host="some-url.com"
          android:pathPrefix="/some-prefix" />
</intent-filter>

I also set the Android Activity to singleTask.

On the JS code:

componentDidMount() {
  Linking.getInitialURL().then((url: string) => {
    if (url) {
      this._handleLinking(url);
    }
  });
}

Expected Behavior

1. URL is not null when handling deep linking. I am using the command:

$ adb shell am start
        -W -a android.intent.action.VIEW
        -d "example://gizmos" com.example.android

Actual Behavior

Development

• I kill the app (manually removing it from apps), I ran the adb command, url is not null and deep linking is ok
• I open the app, I kill the activity with the back button, I ran the adb command, url is not null and deep linking is ok

Production

• I kill the app (manually removing it from apps), I ran the adb command, url is not null and deep linking is ok
• I open the app, I kill the activity with the back button, I ran the adb command, url is null so I cannot handle the deep linking

From Logcat:

09-15 18:18:52.262 675-686/system_process I/ActivityManager: START u0 {act=android.intent.action.VIEW dat=https://some-url.com/... flg=0x10000000 pkg=com.myapp cmp=com.myapp/.MainActivity} from uid 0 on display 0
09-15 18:18:52.386 8191-10955/com.myapp I/ReactNativeJS: Running application "MyApp" with appParams: {"rootTag":11}. __DEV__ === false, development-level warning are OFF, performance optimizations are ON
09-15 18:18:52.393 8191-10955/com.myapp I/ReactNativeJS: getInitialURL null

As you can see Intent has data but the console.log inside getInitialURL shows null as url.

It looks like an issue which the fact that even that I kill the activity with back button, JS bundle is not destroyed till it passes some time. However, I don't understand why the behavior is different in development than in production. The correct behavior is the development one though.

Some debugging

• It looks like

  react-native/ReactAndroid/src/main/java/com/facebook/react/modules/intent/IntentModule.java

  Line 50 in 1e8f3b1

  if (currentActivity != null) {

  currentActivity is null
• Wrapping getInitialURL with a 10ms setTimeout actually makes it work

Race condition somewhere? Is it possible than in this case componentDidMount it's called before the actual activity gets created?

Reproducible Demo

Can't do it in Expo. I'll try to write something I can share.

[radko93]

@facebook-github-bot label Android

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Maybe the issue has been fixed in a recent release, or perhaps it is not affecting a lot of people. If you think this issue should definitely remain open, please let us know why. Thank you for your contributions.