"GraphicsActivityを型に解決できません"

Question

EclipseはGraphicsActivityを認識しません。これはdevelopers.android.comのソースコードですが、テストしようとしていましたが、すぐにエラーが発生します。 ColorPickerDialogでもエラーが発生します。このように "ColorPickerDialogは型に解決できません"ここにはないものをインポートすると思いますか？ GraphicsActivity.javaとColorPickerDialog.javaのソースコードで

package izzy.n; 
import android.content.Context; 
import android.graphics.*; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.MotionEvent; 
import android.view.View; 

public class FingerPaint extends GraphicsActivity 
     implements ColorPickerDialog.OnColorChangedListener { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(new MyView(this)); 

     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); 

     mEmboss = new EmbossMaskFilter(new float[] { 1, 1, 1 }, 
             0.4f, 6, 3.5f); 

     mBlur = new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL); 
    } 

    private Paint  mPaint; 
    private MaskFilter mEmboss; 
    private MaskFilter mBlur; 

    public void colorChanged(int color) { 
     mPaint.setColor(color); 
    } 

    public class MyView extends View { 

     private static final float MINP = 0.25f; 
     private static final float MAXP = 0.75f; 

     private Bitmap mBitmap; 
     private Canvas mCanvas; 
     private Path mPath; 
     private Paint mBitmapPaint; 

     public MyView(Context c) { 
      super(c); 

      mPath = new Path(); 
      mBitmapPaint = new Paint(Paint.DITHER_FLAG); 
     } 

     @Override 
     protected void onSizeChanged(int w, int h, int oldw, int oldh) { 
      super.onSizeChanged(w, h, oldw, oldh); 
      mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); 
      mCanvas = new Canvas(mBitmap); 
     } 

     @Override 
     protected void onDraw(Canvas canvas) { 
      canvas.drawColor(0xFFAAAAAA); 

      canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint); 

      canvas.drawPath(mPath, mPaint); 
     } 

     private float mX, mY; 
     private static final float TOUCH_TOLERANCE = 4; 

     private void touch_start(float x, float y) { 
      mPath.reset(); 
      mPath.moveTo(x, y); 
      mX = x; 
      mY = y; 
     } 
     private void touch_move(float x, float y) { 
      float dx = Math.abs(x - mX); 
      float dy = Math.abs(y - mY); 
      if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) { 
       mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2); 
       mX = x; 
       mY = y; 
      } 
     } 
     private void touch_up() { 
      mPath.lineTo(mX, mY); 
      // commit the path to our offscreen 
      mCanvas.drawPath(mPath, mPaint); 
      // kill this so we don't double draw 
      mPath.reset(); 
     } 

     @Override 
     public boolean onTouchEvent(MotionEvent event) { 
      float x = event.getX(); 
      float y = event.getY(); 

      switch (event.getAction()) { 
       case MotionEvent.ACTION_DOWN: 
        touch_start(x, y); 
        invalidate(); 
        break; 
       case MotionEvent.ACTION_MOVE: 
        touch_move(x, y); 
        invalidate(); 
        break; 
       case MotionEvent.ACTION_UP: 
        touch_up(); 
        invalidate(); 
        break; 
      } 
      return true; 
     } 
    } 

    private static final int COLOR_MENU_ID = Menu.FIRST; 
    private static final int EMBOSS_MENU_ID = Menu.FIRST + 1; 
    private static final int BLUR_MENU_ID = Menu.FIRST + 2; 
    private static final int ERASE_MENU_ID = Menu.FIRST + 3; 
    private static final int SRCATOP_MENU_ID = Menu.FIRST + 4; 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     super.onCreateOptionsMenu(menu); 

     menu.add(0, COLOR_MENU_ID, 0, "Color").setShortcut('3', 'c'); 
     menu.add(0, EMBOSS_MENU_ID, 0, "Emboss").setShortcut('4', 's'); 
     menu.add(0, BLUR_MENU_ID, 0, "Blur").setShortcut('5', 'z'); 
     menu.add(0, ERASE_MENU_ID, 0, "Erase").setShortcut('5', 'z'); 
     menu.add(0, SRCATOP_MENU_ID, 0, "SrcATop").setShortcut('5', 'z'); 

     /**** Is this the mechanism to extend with filter effects? 
     Intent intent = new Intent(null, getIntent().getData()); 
     intent.addCategory(Intent.CATEGORY_ALTERNATIVE); 
     menu.addIntentOptions(
           Menu.ALTERNATIVE, 0, 
           new ComponentName(this, NotesList.class), 
           null, intent, 0, null); 
     *****/ 
     return true; 
    } 

    @Override 
    public boolean onPrepareOptionsMenu(Menu menu) { 
     super.onPrepareOptionsMenu(menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     mPaint.setXfermode(null); 
     mPaint.setAlpha(0xFF); 

     switch (item.getItemId()) { 
      case COLOR_MENU_ID: 
       new ColorPickerDialog(this, this, mPaint.getColor()).show(); 
       return true; 
      case EMBOSS_MENU_ID: 
       if (mPaint.getMaskFilter() != mEmboss) { 
        mPaint.setMaskFilter(mEmboss); 
       } else { 
        mPaint.setMaskFilter(null); 
       } 
       return true; 
      case BLUR_MENU_ID: 
       if (mPaint.getMaskFilter() != mBlur) { 
        mPaint.setMaskFilter(mBlur); 
       } else { 
        mPaint.setMaskFilter(null); 
       } 
       return true; 
      case ERASE_MENU_ID: 
       mPaint.setXfermode(new PorterDuffXfermode(
                 PorterDuff.Mode.CLEAR)); 
       return true; 
      case SRCATOP_MENU_ID: 
       mPaint.setXfermode(new PorterDuffXfermode(
                PorterDuff.Mode.SRC_ATOP)); 
       mPaint.setAlpha(0x80); 
       return true; 
     } 
     return super.onOptionsItemSelected(item); 
    } 
} 

Answer 1

ルック：ここ

はFingerPaint.javaです。

Answer 2

完全に実装するには、オープンソースプロジェクトの一部と欠落しているクラスのみを使用しています。欠落している部分のソースを取得することで解決することができますapidemos project refrences。残っている参照があれば、このリンクを参照してください。

具体的には、あなたがソースがあるためGraphicsActivityクラスたい：

/* 
* Copyright (C) 2008 The Android Open Source Project 
* 
* Licensed under the Apache License, Version 2.0 (the "License"); 
* you may not use this file except in compliance with the License. 
* You may obtain a copy of the License at 
* 
*  http://www.apache.org/licenses/LICENSE-2.0 
* 
* Unless required by applicable law or agreed to in writing, software 
* distributed under the License is distributed on an "AS IS" BASIS, 
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
* See the License for the specific language governing permissions and 
* limitations under the License. 
*/ 

package com.example.android.apis.graphics; 

import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.view.ViewGroup; 
import android.view.Window; 

class GraphicsActivity extends Activity { 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
    } 

    @Override 
    public void setContentView(View view) { 
     if (false) { // set to true to test Picture 
      ViewGroup vg = new PictureLayout(this); 
      vg.addView(view); 
      view = vg; 
     } 

     super.setContentView(view); 
    } 
} 

今後の参考のために、あなたは常にブレッドクラム内のAPIを取得することができます。