Android 颜色选择器

效果图：

代码：

packagecom.venn.color;

importandroid.content.Context;

importandroid.graphics.Canvas;

importandroid.graphics.Paint;

importandroid.graphics.Point;

importandroid.graphics.RectF;

importandroid.util.AttributeSet;

importandroid.util.Log;

importandroid.view.MotionEvent;

importandroid.view.View;

/**

*@authorVenn

*@Email164942747@qq.com

* */

public classColorControlViewextendsView {

privatePaintmPaint;

privatePaintmControlPaint;

private intmSpace;

private intmSelectColor=0;

privateRectFmRect=newRectF(0,0,0,dpTopx(24));

privateSingleTouchListenermListener;

private int[]mColors=new int[]{0xFFFFFFFF,0xFFC4FF2F,0xFF00B200,0xFF00F3D5,

0xFF00B1F5,0xFF0034C5,0xFF9459FF,0xFFFF9EFF,

0xFFFF6C98,0xFFE84057,0xFFBA0100,0xFFFF6E3F,

0xFFFCFF2C,0xFF999999};

publicColorControlView(Context context) {

this(context, null);

}

publicColorControlView(Context context,AttributeSet attrs) {

this(context,attrs,0);

}

publicColorControlView(Context context,AttributeSet attrs, intdefStyleAttr) {

super(context,attrs,defStyleAttr);

mControlPaint=newPaint();

mPaint=newPaint();

}

public voidsetSingeTouchListener(SingleTouchListener mListener) {

this.mListener= mListener;

}

@Override

public voiddraw(Canvas canvas) {

super.draw(canvas);

mSpace= getWidth() /14;

mPaint.setStrokeWidth(dpTopx(9));

for(inti =0;i

mPaint.setColor(mColors[i]);

canvas.drawLine(mSpace* i,dpTopx(12),mSpace* (i +1),dpTopx(12),mPaint);

}

if(mSelectColor

mRect.left=mSpace*mSelectColor;

mRect.right=mSpace* (mSelectColor==0?1:mSelectColor+1);

mControlPaint.setColor(mColors[mSelectColor]);

canvas.drawRoundRect(mRect,7,7,mControlPaint);

Log.d("selecter",mSelectColor+"");

}

}

@Override

public booleanonTouchEvent(MotionEvent event) {

intx =0;

inty =0;

switch(event.getAction()) {

caseMotionEvent.ACTION_UP:

if(mListener!=null&&mSelectColor

mListener.onChangeColor(mColors[mSelectColor]);

}

break;

caseMotionEvent.ACTION_DOWN:

floatlocation = event.getX() /mSpace;

intselectColor = location <1?0: (int) location;

if(mSelectColor!= selectColor) {

mSelectColor= selectColor;

postInvalidate();

}

break;

caseMotionEvent.ACTION_MOVE:

floatmoveLocation = event.getX() /mSpace;

intselectMoveColor = moveLocation <1?0: (int) moveLocation;

if(selectMoveColor

mSelectColor= selectMoveColor;

postInvalidate();

}

break;

default:

break;

}

return true;

}

@Override

protected voidonMeasure(intwidthMeasureSpec, intheightMeasureSpec) {

super.onMeasure(widthMeasureSpec,heightMeasureSpec);

}

public interfaceSingleTouchListener {

public voidonChangeColor(intcolor);

}

private intdpTopx(floatdp){

returnDensityUtils.dp2px(getContext(),dp);

}

}