Android Color Rendering (vi) Radialgradient ring rendering

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Directory (?) [+]

Android color Processing (vi) Radialgradient ring rendering

public radialgradient(float x, float y, float radius, int[] colors, float[] positions,shader.tilemode tile) Float x: center x coordinate float y: center y coordinate float radius: radius

Int[] Colors: Render color Array

Floate[] Positions: Relative position array, nullable, NULL, nullable, color evenly spaced along gradient line

Shader.tilemode tile: renderer tiling mode

public radialgradient(float x, float y, float radius, int color0, int color1,shader.tilemode tile) /c0>Float x: center x coordinate float y: center y coordinate float radius: radius

int COLOR0: Center color

int color1: Round edge Color

Shader.tilemode tile: renderer tiling mode

;

Code:

Mainactivity:

[Java]View PlainCopy

2. Package com.tony.shader;
6. Import Android.os.Bundle;
8. Import android.app.Activity;
12. Public class Mainactivity extends Activity {
16. private Radialgradientview Radialgradientview;
20. @Override
22. protected void OnCreate (Bundle savedinstancestate) {
24. super.oncreate (savedinstancestate);
28. Radialgradientview = New Radialgradientview (this);
30. Setcontentview (Radialgradientview);
32. }
36. }

Radialgradientview:

[Java]View PlainCopy

2. Package com.tony.shader;
6. Import Android.content.Context;
8. Import Android.graphics.Canvas;
10. Import Android.graphics.Color;
12. Import Android.graphics.Paint;
14. Import android.graphics.RadialGradient;
16. Import Android.graphics.Shader;
18. Import Android.util.AttributeSet;
20. Import Android.view.View;
24. Public class Radialgradientview extends View {
28. Paint mpaint = null;
30. //circular gradient rendering
32. Shader mradialgradient = null;
34. Public Radialgradientview (context context) {
36. super (context);
38. //1. Center x coordinate 2.Y coordinates 3. Radius 4. Array of colors 5. Array of relative positions, nullable 6. Renderer Tiling mode
40. Mradialgradient = new Radialgradient ( new int[] {
42. Color.yellow, Color.green, Color.transparent, color.red}, null,
44. Shader.TileMode.REPEAT);
48. Mpaint = new Paint ();
50. }
56. Public Radialgradientview (context context, AttributeSet attrs) {
58. Super (context, attrs);
60. }
64. @Override
66. protected void OnDraw (canvas canvas) {
68. //Draw a circular gradient
70. Mpaint.setshader (mradialgradient);
72. //First, the second parameter represents the center coordinate
74. //The third parameter represents the RADIUS
76. Canvas.drawcircle ( mpaint);
78. }
88. }

Android Color Rendering (vi) Radialgradient ring rendering