android 颜色选择类

颜色选择类，直接使用：

package com.android.music.play; 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.view.MotionEvent; import android.view.View; import android.widget.TextView; public class ColorPickerView extends View { private static final float PI = 3.1415926f; // �� private Paint paintCircleShadow = new Paint(Paint.ANTI_ALIAS_FLAG); private Paint paintCircle = new Paint(Paint.ANTI_ALIAS_FLAG); private Paint paintCenterShadow = new Paint(Paint.ANTI_ALIAS_FLAG); private Paint paintCenter = new Paint(Paint.ANTI_ALIAS_FLAG); private Paint paintGrayShadow = new Paint(Paint.ANTI_ALIAS_FLAG); private Paint paintGray = new Paint(Paint.ANTI_ALIAS_FLAG); private Paint paintLightShadow = new Paint(Paint.ANTI_ALIAS_FLAG); private Paint paintLight = new Paint(Paint.ANTI_ALIAS_FLAG); // private Paint paintText = new Paint(Paint.ANTI_ALIAS_FLAG); private double Zoom = 1; private int[] arrColorGray; private final int[] arrColorCircle = new int[] { 0xFFFF0000, 0xFFFF00FF, 0xFF0000FF, 0xFF00FFFF, 0xFF00FF00, 0xFFFFFF00, 0xFFFF0000 }; private boolean mRedrawHSV; private boolean IsPressCenter; private boolean IsMoveCenter; private int CenterX = 100; private int CenterY = 100; private int CenterRadius = 30; // private LDColorDialog dlg = null; private String strColor = ""; private TextView textColor; public ColorPickerView(Context context, int color, double Zoom,TextView colortext) { super(context); textColor = colortext; this.Zoom = Zoom; CenterX = (int) (100 * Zoom); CenterY = (int) (100 * Zoom); CenterRadius = (int) (30 * Zoom); paintCircleShadow.setColor(0xFF000000); paintCircleShadow.setStyle(Paint.Style.STROKE); paintCircleShadow.setStrokeWidth((float) (32 * Zoom)); paintCircle.setShader(new SweepGradient(0, 0, arrColorCircle, null)); paintCircle.setStyle(Paint.Style.STROKE); paintCircle.setStrokeWidth((float) (32 * Zoom)); paintCenterShadow.setColor(0xFF000000); paintCenterShadow.setStrokeWidth((float) (5 * Zoom)); paintCenter.setColor(color); paintCenter.setStrokeWidth((float) (5 * Zoom)); paintGrayShadow.setColor(0xFF000000); paintGrayShadow.setStrokeWidth((float) (30 * Zoom)); arrColorGray = new int[] { 0xFFFFFFFF, color, 0xFF000000 }; paintGray.setStrokeWidth((float) (30 * Zoom)); paintLightShadow.setColor(0xFF000000); paintLightShadow.setStrokeWidth((float) (60 * Zoom)); paintLight.setStrokeWidth((float) (60 * Zoom)); mRedrawHSV = true; // paintText.setColor(0xFFFFFFFF); // paintText.setAntiAlias(true); // paintText.setTextAlign(Paint.Align.CENTER); } @Override protected void onDraw(Canvas canvas) { // ��ͼ canvas.translate(CenterX, CenterY); float r = CenterX - paintCircle.getStrokeWidth() * 0.5f; // �뾶 int color = paintCenter.getColor(); textColor.setText("#" + Integer.toHexString(color).substring(2).toUpperCase()); // canvas.drawText("#" + Integer.toHexString(color).substring(2).toUpperCase(), CenterX, CenterY, paintText); strColor = "#" + Integer.toHexString(color).substring(2).toUpperCase(); if (mRedrawHSV) { arrColorGray[1] = color; paintGray.setShader(new LinearGradient(CenterX, -CenterY, CenterX, (float) (100 * Zoom), arrColorGray, null, Shader.TileMode.CLAMP)); } canvas.drawOval(new RectF(-r + 3, -r + 3, r + 3, r + 3), paintCircleShadow); canvas.drawOval(new RectF(-r, -r, r, r), paintCircle); canvas.drawCircle(3, 3, CenterRadius, paintCenterShadow); canvas.drawCircle(0, 0, CenterRadius, paintCenter); canvas.drawRect(new RectF(CenterX + (float) (18 * Zoom), -CenterY + 3, CenterX + (float) (48 * Zoom), (float) (103 * Zoom)), paintGrayShadow); // �Ҷȵȼ��Ӱ canvas.drawRect(new RectF(CenterX + (float) (15 * Zoom), -CenterY, CenterX + (float) (45 * Zoom), (float) (100 * Zoom)), paintGray); // �Ҷȵȼ� if (IsPressCenter) { paintCenter.setStyle(Paint.Style.STROKE); if (IsMoveCenter) paintCenter.setAlpha(0xFF); else // ��ָ�ƿ�� paintCenter.setAlpha(0x66); canvas.drawCircle(0, 0, CenterRadius + paintCenter.getStrokeWidth(), paintCenter); // ��Ȧ paintCenter.setStyle(Paint.Style.FILL); paintCenter.setColor(color); } mRedrawHSV = true; } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { setMeasuredDimension(CenterX * 2 + 50, CenterY * 2 + 23); } 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; 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); } @Override public boolean onTouchEvent(MotionEvent event) { float x = event.getX() - CenterX; float y = event.getY() - CenterY; boolean inCenter = java.lang.Math.sqrt(x * x + y * y) <= CenterRadius; switch (event.getAction()) { case MotionEvent.ACTION_DOWN: { IsPressCenter = inCenter; if (inCenter) { IsMoveCenter = true; invalidate(); break; } } case MotionEvent.ACTION_MOVE: { if (IsPressCenter) { if (IsMoveCenter != inCenter) { IsMoveCenter = inCenter; invalidate(); } } else if ((x >= -CenterX && x <= CenterX) && (y >= -CenterY && y <= CenterY)) { float angle = (float) java.lang.Math.atan2(y, x); float unit = angle / (2 * PI); if (unit < 0) unit += 1; paintCenter.setColor(interpColor(arrColorCircle, unit)); invalidate(); } else { int a, r, g, b, c0, c1; float p; if (y < 0) { c0 = arrColorGray[0]; c1 = arrColorGray[1]; p = (y + 100) / 100; } else { c0 = arrColorGray[1]; c1 = arrColorGray[2]; p = y / 100; } 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); paintCenter.setColor(Color.argb(a, r, g, b)); mRedrawHSV = false; invalidate(); } break; } case MotionEvent.ACTION_UP: { if (IsPressCenter) { IsPressCenter = false; invalidate(); } break; } } return true; } public Paint getPaintCircleShadow() { return paintCircleShadow; } public void setPaintCircleShadow(Paint paintCircleShadow) { this.paintCircleShadow = paintCircleShadow; } public Paint getPaintCircle() { return paintCircle; } public void setPaintCircle(Paint paintCircle) { this.paintCircle = paintCircle; } public Paint getPaintCenterShadow() { return paintCenterShadow; } public void setPaintCenterShadow(Paint paintCenterShadow) { this.paintCenterShadow = paintCenterShadow; } public Paint getPaintCenter() { return paintCenter; } public void setPaintCenter(Paint paintCenter) { this.paintCenter = paintCenter; } public Paint getPaintGrayShadow() { return paintGrayShadow; } public void setPaintGrayShadow(Paint paintGrayShadow) { this.paintGrayShadow = paintGrayShadow; } public Paint getPaintGray() { return paintGray; } public void setPaintGray(Paint paintGray) { this.paintGray = paintGray; } public int[] getArrColorGray() { return arrColorGray; } public void setArrColorGray(int[] arrColorGray) { this.arrColorGray = arrColorGray; } public boolean ismRedrawHSV() { return mRedrawHSV; } public void setmRedrawHSV(boolean mRedrawHSV) { this.mRedrawHSV = mRedrawHSV; } public boolean isIsPressCenter() { return IsPressCenter; } public void setIsPressCenter(boolean isPressCenter) { IsPressCenter = isPressCenter; } public boolean isIsMoveCenter() { return IsMoveCenter; } public void setIsMoveCenter(boolean isMoveCenter) { IsMoveCenter = isMoveCenter; } public int[] getArrColorCircle() { return arrColorCircle; } public String getStrColor() { return strColor; } public void setStrColor(String strColor) { this.strColor = strColor; } public double getZoom() { return Zoom; } public void setZoom(double zoom) { Zoom = zoom; } }

使用代码：

LinearLayout layout = new LinearLayout(MediaPlayActivity.this); layout.setOrientation(LinearLayout.VERTICAL); final TextView colorText = new TextView(MediaPlayActivity.this); ColorPickerView colorPick = new ColorPickerView(MediaPlayActivity.this,Color.parseColor("#FFFFFF"), 0.8,colorText); LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.MATCH_PARENT); lp.gravity = Gravity.CENTER_HORIZONTAL; layout.addView(colorPick, lp); layout.addView(colorText,lp); AlertDialog mAlertDialog = new AlertDialog.Builder(MediaPlayActivity.this) .setTitle("choose a color") .setView(layout) .setPositiveButton(getString(R.string.dialog_color_OK), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { Log.d(TAG,"the color choose is "+colorText.getText()); } }) .setNegativeButton(getString(R.string.dialog_color_cancle), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { dialog.cancel(); } }) .create();

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