The Newbie The Newbie - 5 months ago 23
Android Question

Android - Expected Resource of type ID

I have this code

final static int TITLE_ID = 1;
final static int REVIEW_ID = 2;


Now, I want to create a new layout in my main class

public View createContent() {
// create linear layout for the entire view
LinearLayout layout = new LinearLayout(this);
layout.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT));
layout.setOrientation(LinearLayout.VERTICAL);

// create TextView for the title
TextView titleView = new TextView(this);
titleView.setId(TITLE_ID);
titleView.setTextColor(Color.GRAY);
layout.addView(titleView);

StarView sv = new StarView(this);
sv.setId(REVIEW_ID);
layout.addView(sv);

return layout;
}


But when ever I call TITLE_ID and REVIEW_ID, it gives me an error


Supplying the wrong type of resource identifier.

For example, when calling Resources.getString(int id), you should be passing R.string.something, not R.drawable.something.

Passing the wrong constant to a method which expects one of a specific set of constants. For example, when calling View#setLayoutDirection, the parameter must be android.view.View.LAYOUT_DIRECTION_LTR or android.view.View.LAYOUT_DIRECTION_RTL.


I don't have any problem running this code. I'm just wondering why it gives me an error. Any idea?

Answer

This is not a compiler error. It is just editor validation error(lint warning) as this is not a common way to deal with Ids.

So if your app supporting API 17 and higher,

you can call View.generateViewId as

  titleView.setId(View.generateViewId());

and

  sv.setId(View.generateViewId());

and for API<17

  1. open your project's res/values/ folder
  2. create an xml file called ids.xml

with the following content:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <item name="titleId" type="id" />
    <item name="svId" type="id" />
</resources>

then in your code,

  titleView.setId(R.id.titleId);

and

  sv.setId(R.id.svId);

And to disable this warning (If you want)

In Android Studio click on light bulb on line with this 'error'. And select Disable inspection in first submenu.