Eclipse stops Recognizing object (Android) - android

I already tried to find some answer for this but unfortunately I couldn't. I am trying to teach myself Android. Apparently, for no reason, Eclipse stops recognizing a variable between one line and the next one.
I have a class that extends a View (a custom View). I am getting this error on the onDraw (sorry, can't post image)
public void onDraw(Canvas c) {
c.drawBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher), 0, 0, null);
c.Rotate(-10);
}
The drawBitmap line is not recognized as error. If I go after the . in the drawBitmap line and press Ctrl+Space, I get just the Java.Object functions (Equals, hashCode, etc) and not the Canvas'. The c.Rotate line is marked as error - if I open c. the autocomplete does not recognize anything but the basic object functions (no draw, rotate, get/set, etc);
If I try to use the variable before the DrawBitmap, it also won't recognize.
The weird thing is: if I keep just the drawBitmap line, it compiles and runs fine.
What could it be?
EDIT:
Eclipse
Version: 3.7.2
Build id: M20120208-0800
Android Development Toolkit
Version: 16.0.1.v201112150204-238534
Build Target: Android 2.2 (Rev 8)
SOLUTION:
I just had to go into the workspace folder and delete the .Metadata, and re-add the project. I don't know what caused this error, but it got fixed. For more information, please check the first answer. If someone knows what happened, I would find it very interesting to understand what happened.

should be lowercase rotate
c.rotate(-10);
the rest is very mysterious

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activity_main.xml:https://pastebin.com/jPsA0gMX
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