Flutter: Intent

Question

I try to call an Intent request from my Flutter/Android project. As described, it should be done as follows

Intent intent = ​new ​Intent();
intent.setComponent(​new ​ComponentName(​"sk.co.xxx.yyy"​, "sk.co.xxx.yyy.MainActivity"​));
JSONObject jReq = ​new ​JSONObject();
String sReq=​""​;
jReq.put(​"Amount"​,​<Amount>​); 
jReq.put(​"Operation"​,​<Operation>​);
jReq.put(​"TransactionID"​,<can be generated e.g.getRandom()>); 
sReq = jReq.toString();

if​(sReq.isEmpty())​return​; 
intent.putExtra(​"POS_EMULATOR_EXTRA"​, sReq); try ​{
startActivityForResult(intent, ​<requestCode>​); }

How to implement this code under Flutter? I tried to use android_intent package from flutter.dev but i I get the following error message:

E/MethodChannel#plugins.flutter.io/android_intent(22815): Failed to handle method call
E/MethodChannel#plugins.flutter.io/android_intent(22815): android.content.ActivityNotFoundException: No Activity found to handle Intent 

Thanks for any answers!

my Flutter code, to replace the code above, is:

if (Platform.isAndroid) {
    Map data = {
      "Amount": "$amount",
      "Operation": "$operation"
    };
  AndroidIntent intent = AndroidIntent(
    componentName: "sk.co.xxx.yyy"​,
    data: data.toString()
  );
  await intent.launch();

I see, that "MainActivity" and putExtra(​"POS_EMULATOR_EXTRA" are not in my Flutter code, but i don't now, how i can implement...

Answer 1

For the flutter portion, the original attempt wasn't too far off and most likely not the cause of the error. Here is an updated snippet that should construct the proper intent.

if (Platform.isAndroid) {
  final extras = json.encode({
    "Amount": amount,
    "Operation": operation,
    "TransactionID": transActionId,
  });
  final intent = AndroidIntent(
    action: 'action_view',
    package: 'sk.co.xxx.yyy',
    componentName: 'sk.co.xxx.yyy.MainActivity',
    arguments: {"POS_EMULATOR_EXTRA": extras},
  );
  await intent.launch();
}

The more likely cause is a problem with the destination app's AndroidManifest.xml. The activity must be exported so external applications can launch it, and it must also have an intent-filter that matches your incoming intent. For this example, I am using the action_view which maps to android.intent.action.VIEW since the intent is carrying data that will result in something being shown to the user. You can also use action_main to match with android.intent.action.MAIN if you prefer that instead.

<activity 
  android:name=".MainActivity"
  android:exported="true">
  <intent-filter>
    <action android:name="android.intent.action.VIEW" />
    <category android:name="android.intent.category.DEFAULT" />
  </intent-filter>
</activity>