Snippet for making a Toast on Android doesn't work

[Niklas Barsk]

The snippet for creating a Toast on Android doesn't seem to work:

[Android Emulator 5554::owasp.mstg.uncrackable1]->   Java.scheduleOnMainThread(function() {
    Java.use("android.widget.Toast")
        .makeText(
                Java.use("android.app.ActivityThread").currentApplication().getApplicationContext(),
                "Text to Toast here",
                0 // https://developer.android.com/reference/android/widget/Toast#LENGTH_LONG
            )
          .show();
  });
Error: makeText(): argument types do not match any of:
        .overload('android.content.Context', 'int', 'int')
        .overload('android.content.Context', 'java.lang.CharSequence', 'int')
        .overload('android.content.Context', 'android.os.Looper', 'java.lang.CharSequence', 'int')
    at pe (frida/node_modules/frida-java-bridge/lib/class-factory.js:549)
    at frida/node_modules/frida-java-bridge/lib/class-factory.js:951
    at [anon] (input:7)
    at frida/node_modules/frida-java-bridge/index.js:288
[Android Emulator 5554::owasp.mstg.uncrackable1]-> Frida.version
"12.8.20"

[iddoeldor]

Known issue. I was tested on an old device, if you wish I can find time to generate a new working script.

[Niklas Barsk]

That would be appreciated. I'm learning Frida and being able to interact with Android components feels useful. Toasts are pretty simple components so those feel like a good start.

[iddoeldor]

Updated, have fun.
the error is informative enough, it seems makeText has updated and needs CharSequence instead of String

[Niklas Barsk]

Great, thanks! I also realized that Java.Use("java.lang.String").$new("Text to Toast here") works as well.

I recently found https://neo-geo2.gitbook.io/adventures-on-security/frida-scripting-guide/primitive-types that explains that the native javascript string needs to be converted to a Java String object.