Android Roboguice Use Guide (8) Provider bindings

If the @provides method is complex, you can move the code to a separate class. This class needs to implement the Guice provider interface, which defines the following

Public interface 

provider<t> {     
 T get ();}

As a generic interface.

In this example we define a pathprovider for returning a Path object:

public class Pathprovider implements 

provider<path>{     
          
 private String pathdata     
 = "M Q-40 70 60 120 Q 160 Z ";     
 @Override public 
 Path get () {return     
 path.fromstring (pathdata);     
 }     

}

Then define the bindings from the path class to the provider in module:

Bind

(Path.class). Toprovider (Pathprovider.class);

Then use this Path to draw:

 public class Providerbindingsdemo extends graphics2dactivity{@Inject path path;     

 protected void DrawImage () {AffineTransform mat1;     
 Colors Color Redcolor = new Color (0x96ff0000, true);     
 Color Greencolor = new color (0XFF00FF00);     

 Color Bluecolor = new Color (0x750000ff, true);     
 MAT1 = new AffineTransform ();     
 Mat1.translate (30, 40);     

 Mat1.rotate ( -30 * math.pi/180.0);     
 Clear the canvas with white color.     

 Graphics2d.clear (Color.White);     
 Graphics2d.setaffinetransform (New AffineTransform ());     
 SolidBrush brush = new SolidBrush (Greencolor);     
 Graphics2d.fill (brush, path);     

 Graphics2d.setaffinetransform (MAT1);     
 Brush = new SolidBrush (Bluecolor);     
 Com.mapdigit.drawing.Pen Pen = new Com.mapdigit.drawing.Pen (Redcolor, 5);     
 Graphics2d.setpenandbrush (pen, brush);     
 Graphics2d.draw (null, PATH);     

 Graphics2d.fill (null, PATH); }

}

This example downloads: Http://www.imobilebbs.com/download/android/roboguice/ProviderBindingsDe mo.zip

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