java android getResources().getIdentifier()

Question

How do I get the int id value from R. for an id? When I use getIdentifier its just returns 0.

 int i = getArguments().getInt(SELECTION_NUMBER);
 String drawerSelection = getResources().getStringArray(R.array.drawerSelection_array)[i];

int panelId = this.getResources().getIdentifier(drawerSelection.toLowerCase(),"id",getActivity().getPackageName());

Edit

Xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<ListView
    android:id="@+id/Bus_Schedules"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >
</ListView>

</LinearLayout>

log

06-10 21:24:30.372: I/System.out(3572): Selection = Bus_Schedules
06-10 21:24:30.372: I/System.out(3572): panelId = 0

R.java

    public static final class id {
    public static final int Bus_Schedules=0x7f090004;
    public static final int basemenu=0x7f090005;
    public static final int content_frame=0x7f090001;
    public static final int drawer_layout=0x7f090000;
    public static final int left_drawer=0x7f090002;

When it returns 0, it means that the id was not found. What's the value of `drawerSelection`? Have you confirmed that you have an id resource defined with that name? — Ted Hopp, May 31 '13 at 16:41
You need to post some more information about the problem to get any better response. Use the debugger (or a log statement) to determine exactly what value `drawerSelection` has. Post the applicable xml that defines the corresponding id as a resource. (By the way, you can leave out the default locale argument in the call to `toLowerCase`; that's what it will use anyway and it just clutters up your code.) — Ted Hopp, Jun 11 '13 at 04:16

score 25 · Accepted Answer · answered Jun 11 '13 at 18:18

The problem appears to be that you are converting drawerSelection to lower case. As is clear in the R.java file, the case of the identifier is preserved. Try calling:

int panelId = this.getResources().getIdentifier(drawerSelection,"id",getActivity().getPackageName());

David Jashi · Answer 2 · 2013-05-31T16:49:09.430

9

Just checked back in a project I'm writing right now:

int id = getResources().getIdentifier("resourcename", "drawable", getPackageName());

getResources returns int.

UPDATE: Check R.array.drawerSelection_array to include only ID's of existing elements.

edited May 31 '13 at 16:49

answered May 31 '13 at 16:41

David Jashi

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This doesn't answer the question. It returns an int for OP as well. The problem for OP is that the int is 0. – Ted Hopp May 31 '13 at 16:44
"UPDATE: Check R.array.drawerSelection_array to include only ID's of existing elements." ?????? – Spik330 Jun 11 '13 at 01:39
Just add drawable name without `R.drawable.` – sud007 Aug 19 '17 at 12:15

score -1 · Answer 3 · answered May 31 '13 at 17:04

-1

Try this method.

public static int getResId(String fieldName, Context context, Class<?> c) {

    try {
        Field field= c.getDeclaredField(fieldName);
        return field.getInt(field);
    } catch (Exception e) {
        return 0;
    } 
}

Calling

 //edtUserName is my field id
 getResId("edtUserName", context, id.class);

answered May 31 '13 at 17:04

Adnan

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im not using context im using an LayoutInflater and ViewGroup – Spik330 Jun 01 '13 at 04:35
and it can not understand what context is in that statement. – Spik330 Jun 01 '13 at 05:02
Context is your application base context. Simply get it as- getApplicationContext(); – Adnan Jun 02 '13 at 10:59
You aren't even using context in this method. You should be using getIdentifier() – box Jun 09 '16 at 08:11

java android getResources().getIdentifier()

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