How to convert string(R.id.btn_0) into int type - Espresso

Issue

I want to convert string type into int. I am doing automation using espresso.

As per espresso automation syntax for clicking on object, onView(withid(R.id.btn_0).perform(click())

I have json file, where I have stored the object,

"btn_0": {
      "ANDROID": "withId=R.id.btn_0"
  }

Now, when I read btn_0, i get string value for the btn_0 object and withId() takes int.

Note: Integer.parseInt() will not work.

Can anyone help me with this?

Solution

You can parse a resource name to an integer using the Resources.getIdentifier() method, I have prepared an example for you:

@Test
public void parseResourceIdTest() {
    final Context context = InstrumentationRegistry.getTargetContext();

    assertEquals(R.id.btn_0, parseResourceId(context, "btn_0"));
}

public static int parseResourceId(@NonNull Context context, @NonNull String string) {
    return context.getResources().getIdentifier(string, "id", context.getPackageName());
}

Answered By - Jarosław Wiśniewski