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The source code is released under:
Copyright (c) 2012, Tim Edwards All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: ...
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package yuku.ambilwarna; //from w w w . j a v a2s.com import android.annotation.SuppressLint; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.ComposeShader; import android.graphics.LinearGradient; import android.graphics.Paint; import android.graphics.PorterDuff; import android.graphics.Shader; import android.graphics.Shader.TileMode; import android.util.AttributeSet; import android.view.View; public class AmbilWarnaKotak extends View { Paint paint; Shader luar; final float[] color = { 1.f, 1.f, 1.f }; public AmbilWarnaKotak(Context context, AttributeSet attrs) { super(context, attrs); } public AmbilWarnaKotak(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } @SuppressLint("DrawAllocation") @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); if (paint == null) { paint = new Paint(); luar = new LinearGradient(0.f, 0.f, 0.f, this.getMeasuredHeight(), 0xffffffff, 0xff000000, TileMode.CLAMP); } int rgb = Color.HSVToColor(color); Shader dalam = new LinearGradient(0.f, 0.f, this.getMeasuredWidth(), 0.f, 0xffffffff, rgb, TileMode.CLAMP); ComposeShader shader = new ComposeShader(luar, dalam, PorterDuff.Mode.MULTIPLY); paint.setShader(shader); canvas.drawRect(0.f, 0.f, this.getMeasuredWidth(), this.getMeasuredHeight(), paint); } void setHue(float hue) { color[0] = hue; invalidate(); } }