### Drawable

ShapeDrawable
  Demonstrates creating Drawables in XML.

### OpenGL|ES

CameraPreview
  Demonstrates capturing the image stream from the camera, drawing to a surface (extending SurfaceView) on a separate thread (extending Thread).
GL SurfaceView
  Demonstrates how to perform OpenGL rendering in to a SurfaceView.
  Code:
    GLSurfaceViewActivity.java
  Layout:
    hello_world.xml
PolyToPoly
  Demonstrates calling the {@link android.graphics.Matrix.html#setPolyToPoly(float[],int,float[],int,int)} method to translate coordinates on a canvas to a new perspective (used to simulate perspective).
DrawPoints
  Demonstrates using the {@link android.graphics.Paint} and {@link android.graphics.Canvas} objects to draw random points on the screen, with different colors and strokes.
PathEffects
  Demonstrates the use of {@link android.graphics.Path} and various {@link android.graphics.PathEffect} subclasses.
SurfaceView Overlay
  Shows how you can place overlays on top of a SurfaceView.
  Code:
    SurfaceViewOverlay.java
  Layout:
    surface_view_overlay.xml
TouchPaint
  Demonstrates the handling of touch screen events to implement a simple painting app.