Detecting toast messages

Question

I don\'t think this is possible, as I haven\'t found anything in the SDK documentation (yet).

But I could do with knowing if its possible to write an application whi

Answer 1

It's possible to catch Messages/Notifications with an Accessibility Service, have a look at that.

You can extend the class AccessibilityService and override the method onAccessibilityEvent() to implement something like this:

public void onAccessibilityEvent(AccessibilityEvent event) {
    if (event.getEventType() != AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED)
        return; // event is not a notification

    String sourcePackageName = (String) event.getPackageName();

    Parcelable parcelable = event.getParcelableData();
    if (parcelable instanceof Notification) {
        // Statusbar Notification
    }
    else {
        // something else, e.g. a Toast message
        String log = "Message: " + event.getText().get(0) 
                   + " [Source: " + sourcePackageName + "]";
        // write `log` to file...
    }
}

Note: This didn't work for me on Android 2.2 as it doesn't seem to catch Toasts, but it worked on Android 4.0+.