Linking.getInitialURL() url value is null

Is this a bug report?

Yes

Have you read the Contributing Guidelines?

Yes

Environment

1. react-native -v: 2.0.1
2. node -v: 8.4.0
3. npm -v: 4.6.1

Then, specify:

• Target Platform: Android

• Development Operating System: MacOs Sierra

• Build tools: Application created using create-react-native-app and then detached with support of Expo SDK

Steps to Reproduce

(Write your steps here:)

1. Create application using create-react-native-app
2. Detach application with: npm run eject (keep support of Expo SDK)
3. Update AndroidManifest.xml with respective deep links filters inside MainActivity

<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="www.mydomain.com"
              android:pathPrefix="/" />
        <data android:scheme="https"
              android:host="www.mydomain.com" />
</intent-filter>

1. Update activity declaration with android:launchMode="singleTask"
2. Update application component to load url on componentDidMount:

componentDidMount() {
    Linking.getInitialURL().then((url) => {
      console.log('Inside of the function is: ' + url);
      this._handleOpenURL(url);
    }).catch(err => console.error('An error occurred', err));
}

1. Find url is always null

Expected Behavior

url variable populated with respective Url application was loaded with

Actual Behavior

Url is null

[AuraIV]

Same issue

[henebb]

Solved it! I’ll explain what the problem for us was, if anyone is facing the same issue as we did.

We had a custom activity called “SplashActivity” where we had added the

<intent-filter>
    <action android:name="android.intent.action.VIEW" />
    ...

In our SplashActivity.java we started the MainActivity like this:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    Intent intent = new Intent(this, MainActivity.class);
    startActivity(intent);
    finish();
}

For RN to pick up the url from getInitialURL(), we need to pass the data and action to our MainActivity. So basically we just passed the required information to our MainActivity (in SplashActivity.java):

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    Uri data = null;
    String action = null;
    Intent currentIntent = getIntent();
    if (currentIntent != null) {
        Uri intentData = currentIntent.getData();
        if (intentData != null) {
            data = intentData;
        }

        // Get action as well.
        action = currentIntent.getAction();
    }

    Intent intent = new Intent(this, MainActivity.class);
    // Pass data and action (if available).
    if (data != null) {
        intent.setData(data);
    }
    if (action != null) {
        intent.setAction(action);
    }
    startActivity(intent);
    finish();
}

(don’t forget to import android.content.Intent; and import android.net.Uri;)

This solved it for us.