Я сделал простую программу для рисования Android для обучения, я поставил colorDialog, который отображается правильно, после выбора любого цвета, цвет пера не меняется, он все еще остается "черный» цвет по умолчанию. Я пробовал, как показано ниже, пожалуйста, помогите мне, мой код, как показано ниже:

Main.java

   package com.example.singletouch;

import java.util.AbstractMap;
import java.util.Map;
import java.util.concurrent.ConcurrentLinkedQueue;

import com.example.singletouch.SingleTouchView.DrawingPens;

import android.os.Bundle;
import android.app.ActionBar.LayoutParams;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.HorizontalScrollView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class MainActivity extends Activity implements
        ColorPickerDialog.OnColorChangedListener {
    ImageView pen, color;
    SingleTouchView mDrawView;
    RelativeLayout layout, layout1;
    ImageView remove;
    ImageView eraser;
    Paint mPaint;
    private LinearLayout list_color;
    LinearLayout pens;

    private TextView select_color;
    private int selectedColor = 0x00FF0000;
    HorizontalScrollView myplate;




    private Path mPath;

    public Canvas mCanvas;
    LinearLayout pen1, pen2, pen3, pen4;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mDrawView = (SingleTouchView) findViewById(R.id.myview);

        layout = (RelativeLayout) findViewById(R.id.layout);
        pen = (ImageView) findViewById(R.id.pen);
        pens = (LinearLayout) findViewById(R.id.linear);
        pens.setVisibility(View.GONE);
        pen1 = (LinearLayout) findViewById(R.id.pen1);
        pen2 = (LinearLayout) findViewById(R.id.pen2);
        pen3 = (LinearLayout) findViewById(R.id.pen3);
        pen4 = (LinearLayout) findViewById(R.id.pen4);
        eraser = (ImageView) findViewById(R.id.eraser);
        remove = (ImageView) findViewById(R.id.remove);
        color = (ImageView) findViewById(R.id.color);


        pen.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                pens.setVisibility(View.VISIBLE);

            }
        });
        pens.setVisibility(View.GONE);
        pen1.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                mDrawView.setPen(SingleTouchView.DrawingPens.PEN_1);
                pens.setVisibility(View.GONE);

            }
        });
        pen2.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                mDrawView.setPen(SingleTouchView.DrawingPens.PEN_2);
                pens.setVisibility(View.GONE);

            }
        });
        pen3.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                pens.setVisibility(View.GONE);
                mDrawView.setPen(SingleTouchView.DrawingPens.PEN_3);

            }
        });
        pen4.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                pens.setVisibility(View.GONE);
                mDrawView.setPen(SingleTouchView.DrawingPens.PEN_4);

            }
        });

        remove.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                layout.removeView(mDrawView);
                mDrawView = new SingleTouchView(MainActivity.this);
                layout.addView(mDrawView);
            }
        });

        eraser.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {


            }
        });

        color.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                // myplate.setVisibility(View.VISIBLE);
                new ColorPickerDialog(MainActivity.this, MainActivity.this,
                mPaint.getColor()).show();

            }
        });

    }

    @Override
    public void colorChanged(int color) {
        // TODO Auto-generated method stub
        mPaint.getColor();
    }



}
 class SingleTouchView extends View {
    public static int width;
    public int height;
    public Bitmap mBitmap;
    public Canvas mCanvas;
    public Path mPath;
    public Paint mBitmapPaint;
    Context context;
    public Paint mPaint;
    public Paint circlePaint;
    public Path circlePath;

    public enum DrawingPens {
        PEN_1(6), PEN_2(4), PEN_3(2), PEN_4(1);

        public Paint mPaint;

        private DrawingPens(final int width) {
            mPaint = new Paint();

            mPaint.setAntiAlias(true);
            mPaint.setStrokeWidth(width);

            mPaint.setStyle(Paint.Style.STROKE);
            mPaint.setStrokeJoin(Paint.Join.ROUND);
        }

        Paint getPaint() {
            return mPaint;
        }
    }

    public SingleTouchView(final Context context) {
        super(context);

        init(context);
    }

    public SingleTouchView(final Context context, final AttributeSet attrs) {
        super(context, attrs);

        init(context);
        mBitmap = Bitmap.createBitmap(400, 400, Bitmap.Config.ARGB_8888);
        mCanvas = new Canvas(mBitmap);
        mPath = new Path();
        mBitmapPaint = new Paint(Paint.DITHER_FLAG);

        mPaint = new Paint();
        mPaint.setAntiAlias(true);
        mPaint.setDither(true);
        // mPaint.setColor(0xFFFF0000);
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setStrokeJoin(Paint.Join.ROUND);
        mPaint.setStrokeCap(Paint.Cap.ROUND);
        mPaint.setStrokeWidth(12);
    }

    public SingleTouchView(final Context context, final AttributeSet attrs,
            final int defStyle) {
        super(context, attrs, defStyle);

        init(context);
    }

    private ConcurrentLinkedQueue mPaths = new ConcurrentLinkedQueue();

    private Path mCurrentPath;

    private void init(final Context context) {

        setPen(DrawingPens.PEN_3);

    }

    @Override
    public void onDraw(Canvas canvas) {

        super.onDraw(canvas);

        for (Map.Entry entry : mPaths) {
            canvas.drawPath(entry.getKey(), entry.getValue().getPaint());
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent me) {
        float eventX = me.getX();
        float eventY = me.getY();

        switch (me.getAction()) {
        case MotionEvent.ACTION_DOWN:
            mCurrentPath.moveTo(eventX, eventY);
            return true;
        case MotionEvent.ACTION_MOVE:
            mCurrentPath.lineTo(eventX, eventY);
            break;
        case MotionEvent.ACTION_UP:
            break;
        }

        invalidate();

        return true;
    }

    public void setPen(final DrawingPens pen) {

        mCurrentPath = new Path();
        mPaths.add(new AbstractMap.SimpleImmutableEntry(
                mCurrentPath, pen));
    }

ColorPickerDialog.java

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 final int[] mColors;
        private OnColorChangedListener mListener;

        ColorPickerView(Context c, OnColorChangedListener l, int color) {
            super(c);
            mListener = l;
            mColors = new int[] {
                0xFFFF0000, 0xFFFF00FF, 0xFF0000FF, 0xFF00FFFF, 0xFF00FF00,
                0xFFFFFF00, 0xFFFF0000
            };
            Shader s = new SweepGradient(0, 0, mColors, null);

            mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
            mPaint.setShader(s);
            mPaint.setStyle(Paint.Style.STROKE);
            mPaint.setStrokeWidth(32);

            mCenterPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
            mCenterPaint.setColor(color);
            mCenterPaint.setStrokeWidth(5);
        }

        private boolean mTrackingCenter;
        private boolean mHighlightCenter;

        protected void onDraw(Canvas canvas) {
            float r = CENTER_X - mPaint.getStrokeWidth()*0.5f;

            canvas.translate(CENTER_X, CENTER_X);

            canvas.drawOval(new RectF(-r, -r, r, r), mPaint);
            canvas.drawCircle(0, 0, CENTER_RADIUS, mCenterPaint);

            if (mTrackingCenter) {
                int c = 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(c);
            }
        }

        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
            setMeasuredDimension(CENTER_X*2, CENTER_Y*2);
        }

        private static final int CENTER_X = 100;
        private static final int CENTER_Y = 100;
        private static final int CENTER_RADIUS = 32;

        private int floatToByte(float x) {
            int n = java.lang.Math.round(x);
            return n;
        }
        private int pinToByte(int n) {
            if (n < 0) {
                n = 0;
            } else if (n > 255) {
                n = 255;
            }
            return n;
        }

        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 = 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 int rotateColor(int color, float rad) {
            float deg = rad * 180 / 3.1415927f;
            int r = Color.red(color);
            int g = Color.green(color);
            int b = Color.blue(color);

            ColorMatrix cm = new ColorMatrix();
            ColorMatrix tmp = new ColorMatrix();

            cm.setRGB2YUV();
            tmp.setRotate(0, deg);
            cm.postConcat(tmp);
            tmp.setYUV2RGB();
            cm.postConcat(tmp);

            final float[] a = cm.getArray();

            int ir = floatToByte(a[0] * r +  a[1] * g +  a[2] * b);
            int ig = floatToByte(a[5] * r +  a[6] * g +  a[7] * b);
            int ib = floatToByte(a[10] * r + a[11] * g + a[12] * b);

            return Color.argb(Color.alpha(color), pinToByte(ir),
                              pinToByte(ig), pinToByte(ib));
        }

        private static final float PI = 3.1415926f;

        @Override
        public boolean onTouchEvent(MotionEvent event) {
            float x = event.getX() - CENTER_X;
            float y = event.getY() - CENTER_Y;
            boolean inCenter = java.lang.Math.sqrt(x*x + y*y)