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Android 颜色处理(六) RadialGradient 环形渲染
public RadialGradient(float x, float y, float radius, int[] colors, float[] positions,Shader.TileMode tile)
float x: 圆心X坐标
float y: 圆心Y坐标
float radius: 半径
int[] colors: 渲染颜色数组
floate[] positions: 相对位置数组,可为null, 若为null,可为null,颜色沿渐变线均匀分布
Shader.TileMode tile:渲染器平铺模式
public RadialGradient(float x, float y, float radius, int color0, int color1,Shader.TileMode tile)
float x: 圆心X坐标
float y: 圆心Y坐标
float radius: 半径
int color0: 圆心颜色
int color1: 圆边缘颜色
Shader.TileMode tile:渲染器平铺模式
效果图;
代码:
MainActivity:
- package com.tony.shader;
-
- import android.os.Bundle;
- import android.app.Activity;
-
- public class MainActivity extends Activity {
-
- private RadialGradientView radialGradientView;
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
-
- radialGradientView = new RadialGradientView(this);
- setContentView(radialGradientView);
- }
-
- }
RadialGradientView:
- package com.tony.shader;
-
- import android.content.Context;
- import android.graphics.Canvas;
- import android.graphics.Color;
- import android.graphics.Paint;
- import android.graphics.RadialGradient;
- import android.graphics.Shader;
- import android.util.AttributeSet;
- import android.view.View;
-
- public class RadialGradientView extends View {
-
- Paint mPaint = null;
-
- Shader mRadialGradient = null;
- public RadialGradientView(Context context) {
- super(context);
-
- mRadialGradient = new RadialGradient(240, 240, 240, new int[] {
- Color.YELLOW, Color.GREEN, Color.TRANSPARENT, Color.RED }, null,
- Shader.TileMode.REPEAT);
-
- mPaint = new Paint();
- }
-
-
- public RadialGradientView(Context context, AttributeSet attrs) {
- super(context, attrs);
- }
-
- @Override
- protected void onDraw(Canvas canvas) {
-
- mPaint.setShader(mRadialGradient);
-
-
- canvas.drawCircle(240, 360, 200, mPaint);
- }
-
-
-
-
- }
Android 颜色渲染(六) RadialGradient 环形渲染
原文：http://www.cnblogs.com/Free-Thinker/p/5571858.html
