カラーピケットダイアログを開始するにはどうすればいいですか？

Question

私は上のチュートリアルに続きましたhttp://www.yougli.net/android/a-photoshop-like-color-picker-for-your-android-application/

しかし、このダイアログをどのように作成/開始する方法が見つかりませんでしたか？

下記のクラスのコード。

ありがとうございます！ :)

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.Shader; 
import android.os.Bundle; 
import android.view.MotionEvent; 
import android.view.View; 

public class ColorPickerDialog extends Dialog { 
    public interface OnColorChangedListener { 
     void colorChanged(String key, int color); 
    } 

    private OnColorChangedListener mListener; 
    private int mInitialColor, mDefaultColor; 
    private String mKey; 

    private static class ColorPickerView extends View { 
     private Paint mPaint; 
     private float mCurrentHue = 0; 
     private int mCurrentX = 0, mCurrentY = 0; 
     private int mCurrentColor, mDefaultColor; 
     private final int[] mHueBarColors = new int[258]; 
     private int[] mMainColors = new int[65536]; 
     private OnColorChangedListener mListener; 

     ColorPickerView(Context c, OnColorChangedListener l, int color, int defaultColor) { 
      super(c); 
      mListener = l; 
      mDefaultColor = defaultColor; 

      // Get the current hue from the current color and update the main color field 
      float[] hsv = new float[3]; 
      Color.colorToHSV(color, hsv); 
      mCurrentHue = hsv[0]; 
      updateMainColors(); 

      mCurrentColor = color; 

      // Initialize the colors of the hue slider bar 
      int index = 0; 
      for (float i=0; i<256; i += 256/42) // Red (#f00) to pink (#f0f) 
      { 
       mHueBarColors[index] = Color.rgb(255, 0, (int) i); 
       index++; 
      } 
      for (float i=0; i<256; i += 256/42) // Pink (#f0f) to blue (#00f) 
      { 
       mHueBarColors[index] = Color.rgb(255-(int) i, 0, 255); 
       index++; 
      } 
      for (float i=0; i<256; i += 256/42) // Blue (#00f) to light blue (#0ff) 
      { 
       mHueBarColors[index] = Color.rgb(0, (int) i, 255); 
       index++; 
      } 
      for (float i=0; i<256; i += 256/42) // Light blue (#0ff) to green (#0f0) 
      { 
       mHueBarColors[index] = Color.rgb(0, 255, 255-(int) i); 
       index++; 
      } 
      for (float i=0; i<256; i += 256/42) // Green (#0f0) to yellow (#ff0) 
      { 
       mHueBarColors[index] = Color.rgb((int) i, 255, 0); 
       index++; 
      } 
      for (float i=0; i<256; i += 256/42) // Yellow (#ff0) to red (#f00) 
      { 
       mHueBarColors[index] = Color.rgb(255, 255-(int) i, 0); 
       index++; 
      } 

      // Initializes the Paint that will draw the View 
      mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 
      mPaint.setTextAlign(Paint.Align.CENTER); 
      mPaint.setTextSize(12); 
     } 

     // Get the current selected color from the hue bar 
     private int getCurrentMainColor() 
     { 
      int translatedHue = 255-(int)(mCurrentHue*255/360); 
      int index = 0; 
      for (float i=0; i<256; i += 256/42) 
      { 
       if (index == translatedHue) 
        return Color.rgb(255, 0, (int) i); 
       index++; 
      } 
      for (float i=0; i<256; i += 256/42) 
      { 
       if (index == translatedHue) 
        return Color.rgb(255-(int) i, 0, 255); 
       index++; 
      } 
      for (float i=0; i<256; i += 256/42) 
      { 
       if (index == translatedHue) 
        return Color.rgb(0, (int) i, 255); 
       index++; 
      } 
      for (float i=0; i<256; i += 256/42) 
      { 
       if (index == translatedHue) 
        return Color.rgb(0, 255, 255-(int) i); 
       index++; 
      } 
      for (float i=0; i<256; i += 256/42) 
      { 
       if (index == translatedHue) 
        return Color.rgb((int) i, 255, 0); 
       index++; 
      } 
      for (float i=0; i<256; i += 256/42) 
      { 
       if (index == translatedHue) 
        return Color.rgb(255, 255-(int) i, 0); 
       index++; 
      } 
      return Color.RED; 
     } 

     // Update the main field colors depending on the current selected hue 
     private void updateMainColors() 
     { 
      int mainColor = getCurrentMainColor(); 
      int index = 0; 
      int[] topColors = new int[256]; 
      for (int y=0; y<256; y++) 
      { 
       for (int x=0; x<256; x++) 
       { 
        if (y == 0) 
        { 
         mMainColors[index] = Color.rgb(255-(255-Color.red(mainColor))*x/255, 255-(255-Color.green(mainColor))*x/255, 255-(255-Color.blue(mainColor))*x/255); 
         topColors[x] = mMainColors[index]; 
        } 
        else 
         mMainColors[index] = Color.rgb((255-y)*Color.red(topColors[x])/255, (255-y)*Color.green(topColors[x])/255, (255-y)*Color.blue(topColors[x])/255); 
        index++; 
       } 
      } 
     } 

     @Override 
     protected void onDraw(Canvas canvas) { 
      int translatedHue = 255-(int)(mCurrentHue*255/360); 
      // Display all the colors of the hue bar with lines 
      for (int x=0; x<256; x++) 
      { 
       // If this is not the current selected hue, display the actual color 
       if (translatedHue != x) 
       { 
        mPaint.setColor(mHueBarColors[x]); 
        mPaint.setStrokeWidth(1); 
       } 
       else // else display a slightly larger black line 
       { 
        mPaint.setColor(Color.BLACK); 
        mPaint.setStrokeWidth(3); 
       } 
       canvas.drawLine(x+10, 0, x+10, 40, mPaint); 
      } 

      // Display the main field colors using LinearGradient 
      for (int x=0; x<256; x++) 
      { 
       int[] colors = new int[2]; 
       colors[0] = mMainColors[x]; 
       colors[1] = Color.BLACK; 
       Shader shader = new LinearGradient(0, 50, 0, 306, colors, null, Shader.TileMode.REPEAT); 
       mPaint.setShader(shader); 
       canvas.drawLine(x+10, 50, x+10, 306, mPaint); 
      } 
      mPaint.setShader(null); 

      // Display the circle around the currently selected color in the main field 
      if (mCurrentX != 0 && mCurrentY != 0) 
      { 
       mPaint.setStyle(Paint.Style.STROKE); 
       mPaint.setColor(Color.BLACK); 
       canvas.drawCircle(mCurrentX, mCurrentY, 10, mPaint); 
      } 

      // Draw a 'button' with the currently selected color 
      mPaint.setStyle(Paint.Style.FILL); 
      mPaint.setColor(mCurrentColor); 
      canvas.drawRect(10, 316, 138, 356, mPaint); 

      // Set the text color according to the brightness of the color 
      if (Color.red(mCurrentColor)+Color.green(mCurrentColor)+Color.blue(mCurrentColor) < 384) 
       mPaint.setColor(Color.WHITE); 
      else 
       mPaint.setColor(Color.BLACK); 
      canvas.drawText(getResources().getString(R.string.settings_bg_color_confirm), 74, 340, mPaint); 

      // Draw a 'button' with the default color 
      mPaint.setStyle(Paint.Style.FILL); 
      mPaint.setColor(mDefaultColor); 
      canvas.drawRect(138, 316, 266, 356, mPaint); 

      // Set the text color according to the brightness of the color 
      if (Color.red(mDefaultColor)+Color.green(mDefaultColor)+Color.blue(mDefaultColor) < 384) 
       mPaint.setColor(Color.WHITE); 
      else 
       mPaint.setColor(Color.BLACK); 
      canvas.drawText(getResources().getString(R.string.settings_default_color_confirm), 202, 340, mPaint); 
     } 

     @Override 
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
      setMeasuredDimension(276, 366); 
     } 

     @Override 
     public boolean onTouchEvent(MotionEvent event) { 
      if (event.getAction() != MotionEvent.ACTION_DOWN) return true; 
      float x = event.getX(); 
      float y = event.getY(); 

      // If the touch event is located in the hue bar 
      if (x > 10 && x < 266 && y > 0 && y < 40) 
      { 
       // Update the main field colors 
       mCurrentHue = (255-x)*360/255; 
       updateMainColors(); 

       // Update the current selected color 
       int transX = mCurrentX-10; 
       int transY = mCurrentY-60; 
       int index = 256*(transY-1)+transX; 
       if (index > 0 && index < mMainColors.length) 
        mCurrentColor = mMainColors[256*(transY-1)+transX]; 

       // Force the redraw of the dialog 
       invalidate(); 
      } 

      // If the touch event is located in the main field 
      if (x > 10 && x < 266 && y > 50 && y < 306) 
      { 
       mCurrentX = (int) x; 
       mCurrentY = (int) y; 
       int transX = mCurrentX-10; 
       int transY = mCurrentY-60; 
       int index = 256*(transY-1)+transX; 
       if (index > 0 && index < mMainColors.length) 
       { 
        // Update the current color 
        mCurrentColor = mMainColors[index]; 
        // Force the redraw of the dialog 
        invalidate(); 
       } 
      } 

      // If the touch event is located in the left button, notify the listener with the current color 
      if (x > 10 && x < 138 && y > 316 && y < 356) 
       mListener.colorChanged("", mCurrentColor); 

      // If the touch event is located in the right button, notify the listener with the default color 
      if (x > 138 && x < 266 && y > 316 && y < 356) 
       mListener.colorChanged("", mDefaultColor); 

      return true; 
     } 
    } 

    public ColorPickerDialog(Context context, OnColorChangedListener listener, String key, int initialColor, int defaultColor) { 
     super(context); 

     mListener = listener; 
     mKey = key; 
     mInitialColor = initialColor; 
     mDefaultColor = defaultColor; 
    } 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     OnColorChangedListener l = new OnColorChangedListener() { 
      public void colorChanged(String key, int color) { 
       mListener.colorChanged(mKey, color); 
       dismiss(); 
      } 
     }; 

     setContentView(new ColorPickerView(getContext(), l, mInitialColor, mDefaultColor)); 
     setTitle(R.string.settings_bg_color_dialog); 
    } 
} 

Answer 1

それはこのようなものでなければなりません表示するコード：

ColorPickerDialog dialog = new ColorPickerDialog(context, this, 0); 
dialog.show(); 

編集：私は好みを選択するために使用されたクラスでこれを使用していました。クラスはPreferenceを拡張し、OnClickListenerとOnColorChangedListenerを実装したので、ColorPickerDialogのコンストラクタパラメータはcontextです。context - 渡す必要があるアプリケーションコンテキストです（アクティビティ内でgetApplicationContext（）などのアプリケーションコンテキストを取得する方法はいくつかあります）。 'this'はOnColorChangedListenerへの参照です（ColorPickerDialogが呼び出されているクラスはこのインターフェイスを実装していますが、別のクラスでもかまいません）。最後に0が初期カラーの値です。

Answer 2

new ColorPickerDialog(
    this, 
    new ColorPickerDialog.OnColorChangedListener() { 
      @Override 
      public void colorChanged(int color) { 
       //you change your color when the color is changed in the dialog 
       myColor = color; 
      } 
     }, 
    Color.BLACK).show();