自定义对话框显示不出来

Question

继承Dialog的代码：
import android.app.Dialog;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Shader;
import android.graphics.SweepGradient;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager.LayoutParams;

public class ColorPickerDialog extends Dialog {
private final int COLOR_DIALOG_WIDTH = 300;
private final int COLOR_DIALOG_HEIGHT = 300;
private final int CENTER_X = COLOR_DIALOG_WIDTH / 2;
private final int CENTER_Y = COLOR_DIALOG_HEIGHT / 2;
private final int CENTER_RADIUS = 32;

public interface OnColorChangedListener {
    void colorChanged(int color);
}

private OnColorChangedListener mListener;
private int mInitialColor;

public ColorPickerDialog(Context context, OnColorChangedListener listener, int initialColor) {
    super(context);
    mListener = listener;
    mInitialColor = initialColor;

}

private class ColorPickerView extends View {
    private Paint mPaint;
    private Paint mCenterPaint;
    private final int[] mColors; // 颜色带的起始颜色
    private OnColorChangedListener mListener;
    private boolean mTrackingCenter;
    private boolean mHightlightCenter;

    private static final float  PI = 3.1415926f;

    public ColorPickerView(Context c, OnColorChangedListener listener,
            int color) {
        super(c);
        mListener = listener;
        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);


    }

    @Override
    protected void onDraw(Canvas canvas)
    {
        float r = CENTER_X - mPaint.getStrokeWidth() * 0.5f - 20;

        canvas.translate(CENTER_X, CENTER_Y);

        canvas.drawCircle(0, 0, r, mPaint);
        canvas.drawCircle(0, 0, CENTER_RADIUS, mCenterPaint);

        if(mTrackingCenter)
        {
            int c = mCenterPaint.getColor();
            mCenterPaint.setStyle(Paint.Style.STROKE);
            if(mHightlightCenter)
            {
                mCenterPaint.setAlpha(0xFF);
            }
            else
            {
                mCenterPaint.setAlpha(0x00);
            }
            canvas.drawCircle(0, 0, CENTER_RADIUS + mCenterPaint.getStrokeWidth(), mCenterPaint);
            mCenterPaint.setStyle(Paint.Style.FILL);
            mCenterPaint.setColor(c);
        }
    }

    private int ave(int s, int d, float p)
    {
        return s + 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.green(c1), p);
        return Color.argb(a,r,g,b);
    }

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

        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            mTrackingCenter = inCenter;
            if(inCenter)
            {
                mHightlightCenter = true;
                invalidate();
                break;
            }
        case MotionEvent.ACTION_MOVE:
            float angle = (float)Math.atan2(y, x);
            float unit = angle/(2*PI);
            if(unit < 0)
                unit+=1;
            mCenterPaint.setColor(interpColor(mColors, unit));
            invalidate();
            break;
        case  MotionEvent.ACTION_UP:
            if(mTrackingCenter)
            {
                if(inCenter)
                {
                    mListener.colorChanged(mCenterPaint.getColor());
                }
                mTrackingCenter  =false;
                invalidate();
            }
            break;
        default:
            break;
        }
        return true;
    }

}
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    OnColorChangedListener listenr = new OnColorChangedListener() {

        @Override
        public void colorChanged(int color) {
            mListener.colorChanged(color);
            dismiss(); 

        }
    };
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(new ColorPickerView(getContext(), listenr, mInitialColor));
    ColorDrawable colorDrawable = new ColorDrawable();
    colorDrawable.setColor(Color.BLACK);
    getWindow().setBackgroundDrawable(colorDrawable);

    getWindow().setAttributes(new LayoutParams(COLOR_DIALOG_WIDTH,COLOR_DIALOG_HEIGHT, 0,0,0));
}

}

import cn.eoe.superflashlight.ColorPickerDialog.OnColorChangedListener;
import cn.eoe.superflashlight.widget.HideTextView;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;

public class ColorLight extends Bulb implements OnColorChangedListener{
protected int mCurrentColorLight = Color.RED;
protected HideTextView mHideTextViewColorLight;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mHideTextViewColorLight = (HideTextView)findViewById(R.id.textview_hide_color_light);
}

@Override
public void colorChanged(int color) {
    mUIColorLight.setBackgroundColor(color);
    mCurrentColorLight = color;

}

public void onClick_ShowColorPicker(View view)
{
    ColorPickerDialog dialog=new ColorPickerDialog(this, this, Color.RED);
    dialog.show();
}

}

报了这么一条错误：

哪位大神怎么改啊？？？？？？？？？？？？？？？