Android – How to open an app programatically?

How to open an Android app with sent data?

Open an Android app and send data

var appPackageName = "xxx.yyy.zzzz"
PackageManager pm = Android.App.Application.Context.PackageManager;
Intent it = pm.GetLaunchIntentForPackage(appPackageName);
if (it != null)
{
    it.PutExtra("data", someThing);
    it.SetFlags(ActivityFlags.NewTask);
    Android.App.Application.Context.StartActivity(it);
}

Android app is opened and get data

protected override void OnCreate(Bundle savedInstanceState)
{
...
    var data = Intent.GetStringExtra("data");
    if (data != null)
    {
        DataModel obj = JsonConvert.DeserializeObject<DataModel>(data);
    }
}

Why can’t app be opened in Android 10, 11?

It’s because of Android background limitation
background-starts

It’s necessary to add this permission into AndroidManifest file, user needs to turn it on

	<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />