The Shadow of Android programming (Shadow) Making method _android

This article illustrates the shadow (Shadow) method of Android programming. Share to everyone for your reference, specific as follows:

First look at the operating effect of the chart is as follows:

Shadow making: Includes various shapes (rectangles, circles, etc.), as well as text, and so on can set shadows.

What is the principle of shadow making?

In fact it is very simple that you need to set the shadow of something that is considered a primary layer. Then draw a shadow layer underneath the main layer.

Shadow making involves an important function:

public void Setshadowlayer (float radius, float dx, float dy, int color)

Parameters:

Radius: Shadow Radius

Offset of dx:x axis direction

Offset of dy:y axis direction

Color: Shadow Colors

Note: If the radius is set to 0, the meaning is to remove the shadow.

Specific implementation:

Package Xiaosi.textshadow;
Import android.app.Activity;
Import Android.content.Context;
Import Android.graphics.Bitmap;
Import Android.graphics.BitmapFactory;
Import Android.graphics.Canvas;
Import Android.graphics.Color;
Import Android.graphics.Paint;
Import Android.os.Bundle;
Import Android.view.View; public class Textshadowactivity extends activity {@Override public void onCreate (Bundle savedinstancestate) {s
    Uper.oncreate (savedinstancestate);
  Setcontentview (This) (new Drawcanvas);
    Class Drawcanvas extends View {private Bitmap Bitmap = null;
      Public Drawcanvas {Super (context);
    Bitmap = Bitmapfactory.decoderesource (Getresources (), r.drawable.i_skinprocess);
      } @Override protected void OnDraw (Canvas Canvas) {Super.ondraw (Canvas);
      Establish Paint object Paint paint1 = new Paint ();
      Set color Paint1.setcolor (0XFFFFFF00); Set Shadow (soft edge, X-axis displacement, Y-axis displacement, shadow color) Paint1.setshadowlayer (5,3, 3, 0XFFFF00FF);
      Filled Rectangle & its shadow Canvas.drawtext ("I love you very much", 20,40,paint1);
      Paint Paint2 = new Paint ();
      Paint2.setcolor (Color.green);
      Paint2.setshadowlayer (5, 2, color.yellow);
      Canvas.drawtext ("You are so silly", 20,60,paint2);
      Paint Paint3 = new Paint ();
      Paint3.setcolor (color.red);
      Paint3.setshadowlayer (5, 2, color.green);
      Canvas.drawcircle (M, 130,30, Paint3);
      Paint paint4 = new Paint ();
      Paint4.setshadowlayer (5, 8, 7, Color.dkgray);
    Canvas.drawbitmap (bitmap, MB, paint4);

 }
  }
}

For more information on Android-related content readers can view the site: "Android graphics and image processing skills summary", "Android Development introduction and Advanced Course", "Android debugging techniques and common problems solution summary", " Android Multimedia How-to Summary (audio, video, audio, etc), summary of Android Basic components usage, Android View tips Summary, Android layout layout tips and a summary of Android controls usage

I hope this article will help you with the Android program.