第一種： import android.app.Dialog; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.LinearGradient; import android.graphics.Paint; import android.graphics.RectF; import android.graphics.Shader; import android.graphics.SweepGradient; import android.os.Bundle; import android.view.MotionEvent; import android.view.View; public class ColorPickerDialog extends Dialog { public interface OnColorChangedListener { void colorChanged(int color); } private OnColorChangedListener mListener; private int mInitialColor; private static class ColorPickerView extends View { private Paint mPaint; private Paint mCenterPaint; private Paint mRadialPaint; private final int[] mRadialColors; private OnColorChangedListener mListener; private Paint mGradientPaint; private int[] mLinearColors; ColorPickerView(Context c, OnColorChangedListener l, int color) { super(c); mListener = l; mRadialColors = new int[] { 0xFFFF0000, 0xFFFF00FF, 0xFF0000FF, 0xFF00FFFF, 0xFF00FF00, 0xFFFFFF00, 0xFFFF0000 }; Shader s = new SweepGradient(0, 0, mRadialColors, null); mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mPaint.setShader(s); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeWidth(32); mLinearColors = getColors(color); Shader shader = new LinearGradient(0, 0, Center_X * 2, 0, mLinearColors, null, Shader.TileMode.CLAMP); mGradientPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mGradientPaint.setStyle(Paint.Style.STROKE); mGradientPaint.setShader(shader); mGradientPaint.setStrokeWidth(32); mCenterPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mCenterPaint.setColor(color); mCenterPaint.setStrokeWidth(6); mRadialPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mRadialPaint.setColor(color); mRadialPaint.setStrokeWidth(6); } private int[] getColors(int color) { if (color == Color.BLACK || color == Color.WHITE) { return new int[] { Color.BLACK, Color.WHITE }; } return new int[] { Color.BLACK, color, Color.WHITE }; } private boolean mTrackingCenter; private boolean mHighlightCenter; private boolean mTrackingLinGradient; @Override protected void onDraw(Canvas canvas) { float r = COLOR_CIRCLE - mPaint.getStrokeWidth() * 0.5f; canvas.translate(Center_X, COLOR_CIRCLE); canvas.drawOval(new RectF(-r, -r, r, r), mPaint); canvas.drawCircle(0, 0, CENTER_RADIUS, mCenterPaint); if (mTrackingCenter) { int color = mCenterPaint.getColor(); mCenterPaint.setStyle(Paint.Style.STROKE); if (mHighlightCenter) { mCenterPaint.setAlpha(0xFF); } else { mCenterPaint.setAlpha(0x80); } canvas.drawCircle(0, 0, CENTER_RADIUS + mCenterPaint.getStrokeWidth(), mCenterPaint); mCenterPaint.setStyle(Paint.Style.FILL); mCenterPaint.setColor(color); } int color = mRadialPaint.getColor(); mLinearColors = getColors(color); Shader shader = new LinearGradient(0, 0, Center_X * 2, 0, mLinearColors, null, Shader.TileMode.CLAMP); mGradientPaint.setShader(shader); canvas.translate(-Center_X, 0); canvas.drawLine(0, r + 50, Center_X * 2, r + 50, mGradientPaint); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { /*super.onMeasure(widthMeasureSpec, heightMeasureSpec); int parentWidth = MeasureSpec.getSize(widthMeasureSpec); int parentHeight = MeasureSpec.getSize(heightMeasureSpec); setMeasuredDimension(parentWidth, parentHeight); Center_X = (int) Math.ceil(parentWidth*.5); Center_Y = (int) Math.ceil(parentHeight*.5);*/ setMeasuredDimension(Center_X * 2, Center_Y * 2 + 70); } private static int Center_X = 110; private static int Center_Y = 100; private static final int CENTER_RADIUS = 32; private static final int COLOR_CIRCLE = 100; private int ave(int s, int d, float p) { return s + java.lang.Math.round(p * (d - s)); } private int interpColor(int colors[], float unit) { if (unit <= 0) { return colors[0]; } if (unit >= 1) { return colors[colors.length - 1]; } float p = unit * (colors.length - 1); int i = (int) p; p -= i; // now p is just the fractional part [0...1) and i is the index int c0 = colors[i]; int c1 = colors[i + 1]; int a = ave(Color.alpha(c0), Color.alpha(c1), p); int r = ave(Color.red(c0), Color.red(c1), p); int g = ave(Color.green(c0), Color.green(c1), p); int b = ave(Color.blue(c0), Color.blue(c1), p); return Color.argb(a, r, g, b); } private static final float PI = 3.1415926f; @Override public boolean onTouchEvent(MotionEvent event) { float x = event.getX() - Center_X; float y = event.getY() - COLOR_CIRCLE; boolean inCenter = Math.sqrt(x * x + y * y) <= CENTER_RADIUS; boolean outOfRadialGradient = y > COLOR_CIRCLE; switch (event.getAction()) { case MotionEvent.ACTION_DOWN: mTrackingCenter = inCenter; mTrackingLinGradient = outOfRadialGradient; if (inCenter) { mHighlightCenter = true; invalidate(); break; } case MotionEvent.ACTION_MOVE: if (mTrackingCenter) { if (mHighlightCenter != inCenter) { mHighlightCenter = inCenter; invalidate(); } } else if (mTrackingLinGradient) { float unit = Math.max(0, Math.min(Center_X * 2, x + Center_X)) / (Center_X * 2); mCenterPaint.setColor(interpColor(mLinearColors, unit)); invalidate(); } else { float angle = (float) Math.atan2(y, x); // need to turn angle [-PI ... PI] into unit [0....1] float unit = angle / (2 * PI); if (unit < 0) { unit += 1; } int color = interpColor(mRadialColors, unit); mCenterPaint.setColor(color); mRadialPaint.setColor(color); invalidate(); } break; case MotionEvent.ACTION_UP: if (mTrackingCenter) { if (inCenter) { mListener.colorChanged(mCenterPaint.getColor()); } mTrackingCenter = false; // so we draw w/o halo invalidate(); } break; } return true; } } public ColorPickerDialog(Context context, OnColorChangedListener listener, int initialColor) { super(context); mListener = listener; mInitialColor = initialColor; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); OnColorChangedListener l = new OnColorChangedListener() { public void colorChanged(int color) { mListener.colorChanged(color); dismiss(); } }; this.setContentView(new ColorPickerView(this.getContext(), l, mInitialColor)); this.setTitle(R.string.color_pick); /*Display display = this.getWindow().getWindowManager().getDefaultDisplay(); if(display.getWidth() < display.getHeight()) { this.getWindow().setLayout( LayoutParams.FILL_PARENT, (int) Math.ceil(display.getHeight()*.7f) ); } else { this.getWindow().setLayout( (int) Math.ceil(display.getWidth()*.7f), LayoutParams.FILL_PARENT ); }*/ } } new ColorPickerDialog( context, new ColorPickerDialog.OnColorChangedListener() { public void colorChanged(int color) { XXX.setColor(color); } }, oldColor ).show();

第二種：

package com.example.draw;import android.app.AlertDialog;//透明 import android.app.Dialog; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.LinearGradient; import android.graphics.Paint; import android.graphics.RectF; import android.graphics.Shader; import android.graphics.SweepGradient; import android.os.Bundle; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.WindowManager; public class ColorPickerDialog extends Dialog { private final boolean debug = true; private final String TAG = "ColorPicker"; Context context; private String title = "顏色選擇器";//標(biāo)題 private int mInitialColor;//初始顏色 private OnColorChangedListener mListener; /** * 初始顏色黑色 * @param context * @param listener 回調(diào) */ public ColorPickerDialog(Context context, String title, OnColorChangedListener listener) { this(context, Color.BLACK, listener); } /** * * @param context * @param initialColor 初始顏色 * @param listener 回調(diào) */ public ColorPickerDialog(Context context, int initialColor, OnColorChangedListener listener) { super(context); this.context = context; mListener = listener; mInitialColor = initialColor; }@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); WindowManager manager = getWindow().getWindowManager(); int height = (int) (manager.getDefaultDisplay().getHeight() * 0.5f); int width = (int) (manager.getDefaultDisplay().getWidth() * 0.7f); ColorPickerView myView = new ColorPickerView(context, height, width); setContentView(myView); setTitle(title); } private class ColorPickerView extends View { private Paint mPaint;//漸變色環(huán)畫筆 private Paint mCenterPaint;//中間圓畫筆 private Paint mLinePaint;//分隔線畫筆 private Paint mRectPaint;//漸變方塊畫筆 private Shader rectShader;//漸變方塊漸變圖像 private float rectLeft;//漸變方塊左x坐標(biāo) private float rectTop;//漸變方塊右x坐標(biāo) private float rectRight;//漸變方塊上y坐標(biāo) private float rectBottom;//漸變方塊下y坐標(biāo) private final int[] mCircleColors;//漸變色環(huán)顏色 private final int[] mRectColors;//漸變方塊顏色 private int mHeight;//View高 private int mWidth;//View寬 private float r;//色環(huán)半徑(paint中部) private float centerRadius;//中心圓半徑 private boolean downInCircle = true;//按在漸變環(huán)上 private boolean downInRect;//按在漸變方塊上 private boolean highlightCenter;//高亮 private boolean highlightCenterLittle;//微亮 public ColorPickerView(Context context, int height, int width) { super(context); this.mHeight = height - 36; this.mWidth = width; setMinimumHeight(height - 36); setMinimumWidth(width); //漸變色環(huán)參數(shù) mCircleColors = new int[] {0xFFFF0000, 0xFFFF00FF, 0xFF0000FF, 0xFF00FFFF, 0xFF00FF00,0xFFFFFF00, 0xFFFF0000}; Shader s = new SweepGradient(0, 0, mCircleColors, null); mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mPaint.setShader(s); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeWidth(50); r = width / 2 * 0.7f - mPaint.getStrokeWidth() * 0.5f; //中心圓參數(shù) mCenterPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mCenterPaint.setColor(mInitialColor); mCenterPaint.setStrokeWidth(5); centerRadius = (r - mPaint.getStrokeWidth() / 2 ) * 0.7f; //邊框參數(shù) mLinePaint = new Paint(Paint.ANTI_ALIAS_FLAG); mLinePaint.setColor(Color.parseColor("#72A1D1")); mLinePaint.setStrokeWidth(4); //黑白漸變參數(shù) mRectColors = new int[]{0xFF000000, mCenterPaint.getColor(), 0xFFFFFFFF}; mRectPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mRectPaint.setStrokeWidth(5); rectLeft = -r - mPaint.getStrokeWidth() * 0.5f; rectTop = r + mPaint.getStrokeWidth() * 0.5f + mLinePaint.getStrokeMiter() * 0.5f + 15; rectRight = r + mPaint.getStrokeWidth() * 0.5f; rectBottom = rectTop + 50; } @Override protected void onDraw(Canvas canvas) { //移動(dòng)中心 canvas.translate(mWidth / 2, mHeight / 2 - 50); //畫中心圓 canvas.drawCircle(0, 0, centerRadius, mCenterPaint); //是否顯示中心圓外的小圓環(huán) if (highlightCenter || highlightCenterLittle) { int c = mCenterPaint.getColor(); mCenterPaint.setStyle(Paint.Style.STROKE); if(highlightCenter) { mCenterPaint.setAlpha(0xFF); }else if(highlightCenterLittle) { mCenterPaint.setAlpha(0x90); } canvas.drawCircle(0, 0, centerRadius + mCenterPaint.getStrokeWidth(), mCenterPaint); mCenterPaint.setStyle(Paint.Style.FILL); mCenterPaint.setColor(c); } //畫色環(huán) canvas.drawOval(new RectF(-r, -r, r, r), mPaint); //畫黑白漸變塊 if(downInCircle) { mRectColors[1] = mCenterPaint.getColor(); } rectShader = new LinearGradient(rectLeft, 0, rectRight, 0, mRectColors, null, Shader.TileMode.MIRROR); mRectPaint.setShader(rectShader); canvas.drawRect(rectLeft, rectTop, rectRight, rectBottom, mRectPaint); float offset = mLinePaint.getStrokeWidth() / 2; canvas.drawLine(rectLeft - offset, rectTop - offset * 2, rectLeft - offset, rectBottom + offset * 2, mLinePaint);//左 canvas.drawLine(rectLeft - offset * 2, rectTop - offset, rectRight + offset * 2, rectTop - offset, mLinePaint);//上 canvas.drawLine(rectRight + offset, rectTop - offset * 2, rectRight + offset, rectBottom + offset * 2, mLinePaint);//右 canvas.drawLine(rectLeft - offset * 2, rectBottom + offset, rectRight + offset * 2, rectBottom + offset, mLinePaint);//下 super.onDraw(canvas); } @Override public boolean onTouchEvent(MotionEvent event) { float x = event.getX() - mWidth / 2; float y = event.getY() - mHeight / 2 + 50; boolean inCircle = inColorCircle(x, y, r + mPaint.getStrokeWidth() / 2, r - mPaint.getStrokeWidth() / 2); boolean inCenter = inCenter(x, y, centerRadius); boolean inRect = inRect(x, y); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: downInCircle = inCircle; downInRect = inRect; highlightCenter = inCenter; case MotionEvent.ACTION_MOVE: if(downInCircle && inCircle) {//down按在漸變色環(huán)內(nèi), 且move也在漸變色環(huán)內(nèi) float angle = (float) Math.atan2(y, x); float unit = (float) (angle / (2 * Math.PI)); if (unit < 0) { unit += 1; } mCenterPaint.setColor(interpCircleColor(mCircleColors, unit)); if(debug) Log.v(TAG, "色環(huán)內(nèi), 坐標(biāo): " + x + "," + y); }else if(downInRect && inRect) {//down在漸變方塊內(nèi), 且move也在漸變方塊內(nèi) mCenterPaint.setColor(interpRectColor(mRectColors, x)); } if(debug) Log.v(TAG, "[MOVE] 高亮: " + highlightCenter + "微亮: " + highlightCenterLittle + " 中心: " + inCenter); if((highlightCenter && inCenter) || (highlightCenterLittle && inCenter)) {//點(diǎn)擊中心圓, 當(dāng)前移動(dòng)在中心圓 highlightCenter = true; highlightCenterLittle = false; } else if(highlightCenter || highlightCenterLittle) {//點(diǎn)擊在中心圓, 當(dāng)前移出中心圓 highlightCenter = false; highlightCenterLittle = true; } else { highlightCenter = false; highlightCenterLittle = false; } invalidate(); break; case MotionEvent.ACTION_UP: if(highlightCenter && inCenter) {//點(diǎn)擊在中心圓, 且當(dāng)前啟動(dòng)在中心圓 if(mListener != null) { mListener.colorChanged(mCenterPaint.getColor()); ColorPickerDialog.this.dismiss(); } } if(downInCircle) { downInCircle = false; } if(downInRect) { downInRect = false; } if(highlightCenter) { highlightCenter = false; } if(highlightCenterLittle) { highlightCenterLittle = false; } invalidate(); break; } return true; } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(mWidth, mHeight); } /** * 坐標(biāo)是否在色環(huán)上 * @param x 坐標(biāo) * @param y 坐標(biāo) * @param outRadius 色環(huán)外半徑 * @param inRadius 色環(huán)內(nèi)半徑 * @return */ private boolean inColorCircle(float x, float y, float outRadius, float inRadius) { double outCircle = Math.PI * outRadius * outRadius; double inCircle = Math.PI * inRadius * inRadius; double fingerCircle = Math.PI * (x * x + y * y); if(fingerCircle < outCircle && fingerCircle > inCircle) { return true; }else { return false; } } /** * 坐標(biāo)是否在中心圓上 * @param x 坐標(biāo) * @param y 坐標(biāo) * @param centerRadius 圓半徑 * @return */ private boolean inCenter(float x, float y, float centerRadius) { double centerCircle = Math.PI * centerRadius * centerRadius; double fingerCircle = Math.PI * (x * x + y * y); if(fingerCircle < centerCircle) { return true; }else { return false; } } /** * 坐標(biāo)是否在漸變色中 * @param x * @param y * @return */ private boolean inRect(float x, float y) { if( x <= rectRight && x >=rectLeft && y <= rectBottom && y >=rectTop) { return true; } else { return false; } } /** * 獲取圓環(huán)上顏色 * @param colors * @param unit * @return */ private int interpCircleColor(int colors[], float unit) { if (unit <= 0) { return colors[0]; } if (unit >= 1) { return colors[colors.length - 1]; } float p = unit * (colors.length - 1); int i = (int)p; p -= i; // now p is just the fractional part [0...1) and i is the index int c0 = colors[i]; int c1 = colors[i+1]; int a = ave(Color.alpha(c0), Color.alpha(c1), p); int r = ave(Color.red(c0), Color.red(c1), p); int g = ave(Color.green(c0), Color.green(c1), p); int b = ave(Color.blue(c0), Color.blue(c1), p); return Color.argb(a, r, g, b); } /** * 獲取漸變塊上顏色 * @param colors * @param x * @return */ private int interpRectColor(int colors[], float x) { int a, r, g, b, c0, c1; float p; if (x < 0) { c0 = colors[0]; c1 = colors[1]; p = (x + rectRight) / rectRight; } else { c0 = colors[1]; c1 = colors[2]; p = x / rectRight; } a = ave(Color.alpha(c0), Color.alpha(c1), p); r = ave(Color.red(c0), Color.red(c1), p); g = ave(Color.green(c0), Color.green(c1), p); b = ave(Color.blue(c0), Color.blue(c1), p); return Color.argb(a, r, g, b); } private int ave(int s, int d, float p) { return s + Math.round(p * (d - s)); } } /** * 回調(diào)接口 * @author <a href="clarkamx@gmail.com">LynK</a> * * Create on 2012-1-6 上午8:21:05 * */ public interface OnColorChangedListener { /** * 回調(diào)函數(shù) * @param color 選中的顏色 */ void colorChanged(int color); } public int getmInitialColor() { return mInitialColor; } public void setmInitialColor(int mInitialColor) { this.mInitialColor = mInitialColor; } public OnColorChangedListener getmListener() { return mListener; } public void setmListener(OnColorChangedListener mListener) { this.mListener = mListener; } }
dialog = new ColorPickerDialog(this, p.getColor(),new ColorPickerDialog.OnColorChangedListener() {@Overridepublic void colorChanged(int color) {p.setColor(color);}});dialog.show();

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