These are the possible errors that I can imagine:
1- In your layout.xml you have an element like this:
<View
android:id="@+id/your_id"
android:layout_width="match_parent"
android:layout_height="match_parent" />
But you have this instead:
<View
android:id="@id/your_id"
android:layout_width="match_parent"
android:layout_height="match_parent" />
So... your_id element isn't added to R.java and that's the problem.
2- You're using a RelativeLayout and your doing something like this:
<TextView
android:id="@+id/your_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toLeftOf="@id/other_id"
android:layout_toRightOf="@id/other_id2"
android:visibility="invisible" >
</TextView>
But other_id or/and other_id2 elements don't exist and that's the problem.
3- Maybe you're making a wrong reference, for example... calling R.id.my_layout when you should be calling R.layout.my_layout or vice versa.
Maybe I'm missing some cases but those are the problems that I can imagine so far.
If you still can't fix the problem, then you should search the resource of the error.
- in Eclipse, open the "gen" folder
- In that folder you'll see a package (com.simplistic.floating_equalizerpro I think), expand it
- Open the R.java file
- (CMD + F) or (CTRL + F) and search the id #0x7f070008
- Notice the resource name, you should know where in your code you used that resource... and fix it.