Apps WTF... Why aren't my ID tags working at all.

falkon114 · Apr 1, 2011

I'm trying to do the most basic program in the world. Seriously, the most basic, rudimentary conversion app never invented for my class. All i want to do is have someone enter a number, then click whether they want that number converted to KM or Mi.
So I have an edit text field and two buttons, one each for KM and Mi... when I try to do the Button km = (Button) findViewById(R.id.km); code, id is underlined because the program never even creates an id method in the auto generated R file.
What the ****! I haven't found this error on the internet, and none of my classmates have any idea, since no one else gets this error.
Any ideas? This is extremely frustrating.

id0001 · Apr 1, 2011

how are you defining your id's?
can you give an example of your layout xml?

falkon114 · Apr 1, 2011

Code:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <EditText android:layout_width="match_parent"
        android:layout_height="wrap_content" android:id="@+id/editText1"
        android:text="EditText"></EditText>
    <TableLayout android:layout_width="match_parent"
        android:layout_height="wrap_content" android:id="@+id/tableLayout1">
        <Button android:layout_width="wrap_content"
            android:text="@string/km" android:layout_height="wrap_content" android:id="@+id/km"></Button>
        <Button android:id="@+id/mi" android:layout_width="wrap_content"
            android:text="@string/mi" android:layout_height="wrap_content"></Button>
    </TableLayout>
</LinearLayout>

Code:

// imported methods here
public class Assn08 extends Activity implements OnClickListener{
    /** Called when the activity is first created. */
    private Button km;
    private Button mi;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        Button km = (Button)this.findViewById(R.id.); //////EAGDZ
        Button mi = (Button) findViewById(R.id.);
    }
}

Also, i remember seeing a setting for having each xml element on it's own line in the coding window... Know where it's at?

id0001 · Apr 2, 2011

It doesn't generate any errors if I try it.

Do you have any error reports in your error window?

miXer · Apr 2, 2011

You can try to "Clean" the project by clicking: Project->Clean

falkon114 · Apr 2, 2011

No errors, no error reports, except underlining id and saying the method isn't there, but if I try to create the method in R, it does this deal:

Code:

public static Object id;

and doesn't add the button or memory location anyway...

The Clean... thing worked perfectly, except now this is underlined...

http://s10.photobucket.com/albums/a115/Falkon114/Picture2-14.png
says "The method findViewById(int) in the type Activity is not applicable for the arguments (Class<R.id>)"
.. =/

Edit:
So i casted it like this
((Button) findViewById(R.id.mi)).setOnClickListener(this);

and it works fine. now all I'm confused about is how do I store a number from an edit text field into a variable so I can work with it?

id0001 · Apr 3, 2011

You should be able to cast it to a button normally.
then you could access the properties Button has.

Apps WTF... Why aren't my ID tags working at all.

falkon114

Newbie

id0001

Well-Known Member

falkon114

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id0001

Well-Known Member

miXer

Android Enthusiast

falkon114

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id0001

Well-Known Member

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