如何更改筆在按鈕上的顏色筆點擊android

Question

我已經做了一個簡單的android程序單眼觸摸油漆，在它我有aut 4種不同大小的筆，我想是基於該圖像我想改變strokesize筆。我曾經如下嘗試，請大家幫幫我：

main.java

public class MainActivity extends Activity implements OnClickListener { 
    ImageView pen, color; 
    SingleTouchView mDrawView; 
    RelativeLayout layout, layout1; 
    ImageView remove; 
    ImageView eraser; 
    LinearLayout pens; 
    HorizontalScrollView myplate; 
    private Paint mPaint, mBitmapPaint; 
    private Button red, green, blue, cyan, yellow, orange, aqua, black, cofee, 
      fuchiya, gray, indigo, khaki, lavendar, magenta, mango, maroon, 
      pista, pink, purple; 

    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); 
     layout1 = (RelativeLayout) findViewById(R.id.layout1); 
     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); 
     color = (ImageView) findViewById(R.id.color); 
     myplate = (HorizontalScrollView) findViewById(R.id.myplate); 

     // colors.........!!!! 
     red = (Button) findViewById(R.id.red); 
     green = (Button) findViewById(R.id.green); 
     blue = (Button) findViewById(R.id.blue); 
     orange = (Button) findViewById(R.id.orange); 
     yellow = (Button) findViewById(R.id.yellow); 
     cyan = (Button) findViewById(R.id.cyan); 
     black = (Button) findViewById(R.id.black); 
     cofee = (Button) findViewById(R.id.cofee); 
     fuchiya = (Button) findViewById(R.id.fuchiya); 
     gray = (Button) findViewById(R.id.gray); 
     indigo = (Button) findViewById(R.id.indigo); 
     khaki = (Button) findViewById(R.id.khaki); 
     lavendar = (Button) findViewById(R.id.lavendar); 
     magenta = (Button) findViewById(R.id.magenta); 
     mango = (Button) findViewById(R.id.mango); 
     maroon = (Button) findViewById(R.id.maroon); 
     pista = (Button) findViewById(R.id.pista); 
     pink = (Button) findViewById(R.id.pink); 
     purple = (Button) findViewById(R.id.purple); 

     red.setOnClickListener(this); 
     green.setOnClickListener(this); 
     blue.setOnClickListener(this); 
     orange.setOnClickListener(this); 
     yellow.setOnClickListener(this); 
     cyan.setOnClickListener(this); 
     black.setOnClickListener(this); 
     cofee.setOnClickListener(this); 
     fuchiya.setOnClickListener(this); 
     gray.setOnClickListener(this); 
     indigo.setOnClickListener(this); 
     khaki.setOnClickListener(this); 
     lavendar.setOnClickListener(this); 
     magenta.setOnClickListener(this); 
     mango.setOnClickListener(this); 
     maroon.setOnClickListener(this); 
     pista.setOnClickListener(this); 
     pink.setOnClickListener(this); 
     purple.setOnClickListener(this); 

     eraser = (ImageView) findViewById(R.id.eraser); 
     remove = (ImageView) findViewById(R.id.remove); 

     pen.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       // layout.addView(mDrawView); 
       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) { 
       mBitmapPaint.setColor(Color.TRANSPARENT); 
       mPath.reset(); 
       mDrawView.invalidate(); 
       } 
     }); 

     color.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       myplate.setVisibility(View.VISIBLE); 
      } 
     }); 
    } 

    // /colorpicker................! 
    @Override 
    public void onClick(View v) { 
     switch (v.getId()) { 
     case R.id.black: 
      myplate.setVisibility(View.GONE); 
      mDrawView.setColor(SingleTouchView.DrawingColors.Black); 
      System.out.println("==============="+SingleTouchView.DrawingColors.Black+"========================="); 
      break; 
     case R.id.blue: 
      myplate.setVisibility(View.GONE); 
      //mDrawView.setColor(SingleTouchView.DrawingColors.Blue); 
      break; 
     case R.id.cofee: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.cyan: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.fuchiya: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.gray: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.green: 
      myplate.setVisibility(View.GONE); 

      break; 
     case R.id.indigo: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.khaki: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.lavendar: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.magenta: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.mango: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.maroon: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.orange: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.pink: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.pista: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.purple: 
      myplate.setVisibility(View.GONE); 
      break; 
     case R.id.red: 
      myplate.setVisibility(View.GONE); 

      break; 
     case R.id.yellow: 
      myplate.setVisibility(View.GONE); 
      break; 
     } 
    } 
} 

Singleotuch.java

public 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 enum DrawingColors{ 
     Black(Color.parseColor("#000000")),Blue(Color.parseColor("#0000FF")),Cofee(Color.parseColor("#D2691E")),Cyan(Color.parseColor("#00FFFF")) 
     ,Fuchiya(Color.parseColor("#FF00FF")),Gray(Color.parseColor("#808080")),Green(Color.parseColor("#00FF00")),Indigo(Color.parseColor("#4B0082")), 
     Khaki(Color.parseColor("#F0E68C")),Lavendar(Color.parseColor("#E6E6FA")),Magenta(Color.parseColor("#FF00FF")),Mango(Color.parseColor("#FF8C00")) 
     ,Maroon(Color.parseColor("#800000")),Orange(Color.parseColor("#FFA500")),Pink(Color.parseColor("#FFC0CB")),Pista(Color.parseColor("#9ACD32")), 
     Purple(Color.parseColor("#800080")),Red(Color.parseColor("#FF0000")),Tan(Color.parseColor("#0000A0")),Yellow(Color.parseColor("#FFD801")); 

     public Paint mPaint; 

     private DrawingColors(final int color) { 
      mPaint = new Paint(); 

      mPaint.setAntiAlias(true); 
      mPaint.setStrokeWidth(width); 
      mPaint.setColor(color); 
      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<Map.Entry<Path, DrawingPens>> mPaths = new ConcurrentLinkedQueue<Map.Entry<Path, DrawingPens>>(); 
    private ConcurrentLinkedQueue<Map.Entry<Path, DrawingColors>> mPaths1 = new ConcurrentLinkedQueue<Map.Entry<Path, DrawingColors>>(); 

    private Path mCurrentPath; 


    private void init(final Context context) { 
     setPen(DrawingPens.PEN_1); 
    } 

    @Override 
    public void onDraw(Canvas canvas) { 

     super.onDraw(canvas); 

     for (Map.Entry<Path, DrawingPens> 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<Path, DrawingPens>(
       mCurrentPath, pen)); 
    } 
    public void eraser() { 
     mPaint = new Paint(); 
    } 
    public void setColor(final DrawingColors color) { 

     mCurrentPath = new Path(); 
     mPaths1.add(new AbstractMap.SimpleImmutableEntry<Path, DrawingColors>(
       mCurrentPath, color)); 
    } 
} 

Answer 1

似乎沒有隻繪畫能力部分Path使用一個Paint並與另一部分畫另一部分。所以，我看到唯一的解決方案 - 使用多個Paths並對應到Paint的路徑。此外，我建議將所有繪圖相關信息封裝在視圖中，並讓Activity以高層次的東西進行操作。

所以下面的變化應該應用：

1. 用一些容器Path S和保持路徑 - 油漆關係裏面;
2. 從自定義View提供一些方法讓活動更改當前筆;
3. 將繪圖細節保留在自定義視圖中，因爲Activity可能不需要這些細節;

類似如下：

public class MyActivity extends Activity implements View.OnClickListener { 

    private static final String TAG = "MyActivity"; 

    ImageView pen, color; 
    SingleTouchDrawingView mDrawView; 
    // Drawing view container 
    ImageView mRemove; 
    ImageView mEraser; 
    LinearLayout pens; 
    HorizontalScrollView myplate; 
    private Paint mPaint; 
    private Paint mBitmapPaint; 
    private View aqua; 
    private ViewGroup mRootView; 

    private Path mPath; 
    public Canvas mCanvas; 
    View pen1; 
    View pen2; 
    View pen3; 
    View pen4; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     mRootView = (ViewGroup) findViewById(R.id.root); 
     mDrawView = (SingleTouchDrawingView) findViewById(R.id.myview); 
     pen = (ImageView) findViewById(R.id.pen); 
     pens = (LinearLayout) findViewById(R.id.linear); 
     pens.setVisibility(View.GONE); 
     pen1 = findViewById(R.id.pen1); 
     pen2 = findViewById(R.id.pen2); 
     pen3 = findViewById(R.id.pen3); 
     pen4 = findViewById(R.id.pen4); 
     color = (ImageView) findViewById(R.id.color); 
     myplate = (HorizontalScrollView) findViewById(R.id.myplate); 

     // colors.........!!!! 
     final View red = findViewById(R.id.red); 
     final View green = findViewById(R.id.green); 
     final View blue = findViewById(R.id.blue); 
     final View orange = findViewById(R.id.orange); 
     final View yellow = findViewById(R.id.yellow); 
     final View cyan = findViewById(R.id.cyan); 
     final View black = findViewById(R.id.black); 
     final View cofee = findViewById(R.id.coffee); 
     final View fuchiya = findViewById(R.id.fuchiya); 
     final View gray = findViewById(R.id.gray); 
     final View indigo = findViewById(R.id.indigo); 
     final View khaki = findViewById(R.id.khaki); 
     final View lavendar = findViewById(R.id.lavendar); 
     final View magenta = findViewById(R.id.magenta); 
     final View mango = findViewById(R.id.mango); 
     final View maroon = findViewById(R.id.maroon); 
     final View pista = findViewById(R.id.pista); 
     final View pink = findViewById(R.id.pink); 
     final View purple = findViewById(R.id.purple); 

     red.setOnClickListener(this); 
     green.setOnClickListener(this); 
     blue.setOnClickListener(this); 
     orange.setOnClickListener(this); 
     yellow.setOnClickListener(this); 
     cyan.setOnClickListener(this); 
     black.setOnClickListener(this); 
     cofee.setOnClickListener(this); 
     fuchiya.setOnClickListener(this); 
     gray.setOnClickListener(this); 
     indigo.setOnClickListener(this); 
     khaki.setOnClickListener(this); 
     lavendar.setOnClickListener(this); 
     magenta.setOnClickListener(this); 
     mango.setOnClickListener(this); 
     maroon.setOnClickListener(this); 
     pista.setOnClickListener(this); 
     pink.setOnClickListener(this); 
     purple.setOnClickListener(this); 

     mEraser = (ImageView) findViewById(R.id.eraser); 
     mRemove = (ImageView) findViewById(R.id.remove); 

     pen.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (pens.getVisibility() == View.VISIBLE) { 
        pens.setVisibility(View.GONE); 
       } else { 
        pens.setVisibility(View.VISIBLE); 
        myplate.setVisibility(View.GONE); 
       } 
      } 
     }); 

     pens.setVisibility(View.GONE); 

     pen1.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       mDrawView.setPen(SingleTouchDrawingView.DrawingPens.PEN_1); 
       pens.setVisibility(View.GONE); 
      } 
     }); 

     pen2.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       mDrawView.setPen(SingleTouchDrawingView.DrawingPens.PEN_2); 
       pens.setVisibility(View.GONE); 
      } 
     }); 

     pen3.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       pens.setVisibility(View.GONE); 
       mDrawView.setPen(SingleTouchDrawingView.DrawingPens.PEN_3); 
      } 
     }); 

     pen4.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       pens.setVisibility(View.GONE); 
       mDrawView.setPen(SingleTouchDrawingView.DrawingPens.PEN_4); 
      } 
     }); 

     mRemove.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       mRootView.removeView(mDrawView); 
       mDrawView = new SingleTouchDrawingView(MyActivity.this); 
       mDrawView.setBackgroundResource(R.drawable.up_image); 
       mRootView.addView(mDrawView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); 
       mRootView.bringChildToFront(findViewById(R.id.tools_container)); 
       mRootView.bringChildToFront(findViewById(R.id.linear)); 
       mRootView.bringChildToFront(findViewById(R.id.myplate)); 
       pens.setVisibility(View.GONE); 
       myplate.setVisibility(View.GONE); 
      } 
     }); 

     mEraser.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       mBitmapPaint.setColor(Color.TRANSPARENT); 
       mPath.reset(); 
       mDrawView.invalidate(); 
       pens.setVisibility(View.GONE); 
       myplate.setVisibility(View.GONE); 
      } 
     }); 

     color.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (myplate.getVisibility() == View.VISIBLE) { 
        myplate.setVisibility(View.GONE); 
       } else { 
        myplate.setVisibility(View.VISIBLE); 
        pens.setVisibility(View.GONE); 
       } 
      } 
     }); 
    } 

    // /colorpicker................! 
    @Override 
    public void onClick(View v) { 
     switch (v.getId()) { 
      case R.id.black: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.BLACK); 
       break; 
      case R.id.blue: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.BLUE); 
       break; 
      case R.id.coffee: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.COFEE); 
       break; 
      case R.id.cyan: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.CYAN); 
       break; 
      case R.id.fuchiya: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.FUCHIYA); 
       break; 
      case R.id.gray: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.GRAY); 
       break; 
      case R.id.green: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.GREEN); 
       break; 
      case R.id.indigo: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.INDIGO); 
       break; 
      case R.id.khaki: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.KHAKI); 
       break; 
      case R.id.lavendar: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.LAVENDAR); 
       break; 
      case R.id.magenta: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.MAGENTA); 
       break; 
      case R.id.mango: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.MANGO); 
       break; 
      case R.id.maroon: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.MAROON); 
       break; 
      case R.id.orange: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.ORANGE); 
       break; 
      case R.id.pink: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.PINK); 
       break; 
      case R.id.pista: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.PISTA); 
       break; 
      case R.id.purple: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.PURPLE); 
       break; 
      case R.id.red: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.RED); 
       break; 
      case R.id.yellow: 
       myplate.setVisibility(View.GONE); 
       mDrawView.setColor(SingleTouchDrawingView.DrawingColors.YELLOW); 
       break; 
     } 
    } 
} 

，並查看自己：

public class SingleTouchDrawingView extends View { 

    public int height; 
    public Bitmap mBitmap; 
    public Canvas mCanvas; 
    public Path mPath; 
    public Paint mBitmapPaint; 
    Context context; 

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

     public int mWidth; 

     private DrawingPens(final int width) { 
      mWidth = width; 
     } 

     int getPenWidth() { 
      return mWidth; 
     } 
    } 

    public enum DrawingColors{ 
     BLACK(Color.parseColor("#000000")), BLUE(Color.parseColor("#0000FF")),  COFEE(Color.parseColor("#D2691E")), CYAN(Color.parseColor("#00FFFF")), 
     FUCHIYA(Color.parseColor("#FF00FF")), GRAY(Color.parseColor("#808080")),  GREEN(Color.parseColor("#00FF00")), INDIGO(Color.parseColor("#4B0082")), 
     KHAKI(Color.parseColor("#F0E68C")), LAVENDAR(Color.parseColor("#E6E6FA")), MAGENTA(Color.parseColor("#FF00FF")), MANGO(Color.parseColor("#FF8C00")), 
     MAROON(Color.parseColor("#800000")), ORANGE(Color.parseColor("#FFA500")), PINK(Color.parseColor("#FFC0CB")), PISTA(Color.parseColor("#9ACD32")), 
     PURPLE(Color.parseColor("#800080")), RED(Color.parseColor("#FF0000")),  TAN(Color.parseColor("#0000A0")),  YELLOW(Color.parseColor("#FFD801")); 

     private int mColorValue; 

     private DrawingColors(final int color) { 
      mColorValue = color; 
     } 

     int getColorValue() { 
      return mColorValue; 
     } 
    } 

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

     init(context); 
    } 

    public SingleTouchDrawingView(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); 
    } 

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

     init(context); 
    } 

    private ConcurrentLinkedQueue<Map.Entry<Path, Map.Entry<DrawingPens, DrawingColors>>> mPaths = new ConcurrentLinkedQueue<Map.Entry<Path, Map.Entry<DrawingPens, DrawingColors>>>(); 
    /** Stores created {@link Paint} objects */ 
    private HashMap<Map.Entry<DrawingPens, DrawingColors>, Paint> mPaints = new HashMap<Map.Entry<DrawingPens, DrawingColors>, Paint>(); 
    /** Current paint parameters - PEN_1 width and BLACK color */ 
    private AbstractMap.SimpleImmutableEntry<DrawingPens, DrawingColors> mCurrentPaintParameters = new AbstractMap.SimpleImmutableEntry<DrawingPens, DrawingColors>(DrawingPens.PEN_1, DrawingColors.BLACK); 

    private Path mCurrentPath = null; 


    private void init(final Context context) { 
     // Initialize default paint 
     getPaintWithParameters(mCurrentPaintParameters); 
     mCurrentPath = new Path(); 
     mPaths.add(new AbstractMap.SimpleImmutableEntry<Path, Map.Entry<DrawingPens, DrawingColors>>(mCurrentPath, mCurrentPaintParameters)); 
    } 

    /** 
    * Helper to create Paint from parameters 
    * 
    * @param paintParameters 
    * @return 
    */ 
    private Paint getPaintWithParameters(final Map.Entry<DrawingPens, DrawingColors> paintParameters) { 
     Paint paint = mPaints.get(paintParameters); 

     if (null == paint) { 
      paint = new Paint(); 
      paint.setAntiAlias(true); 
      paint.setDither(true); 
      paint.setStrokeWidth(paintParameters.getKey().getPenWidth()); 
      paint.setColor(paintParameters.getValue().getColorValue()); 
      paint.setStyle(Paint.Style.STROKE); 
      paint.setStrokeJoin(Paint.Join.ROUND); 
      paint.setStrokeCap(Paint.Cap.ROUND); 

      mPaints.put(paintParameters, paint); 
     } 

     return paint; 
    } 

    @Override 
    public void onDraw(Canvas canvas) { 
     super.onDraw(canvas); 

     for (Map.Entry<Path, Map.Entry<DrawingPens, DrawingColors>> entry : mPaths) { 
      canvas.drawPath(entry.getKey(), getPaintWithParameters((entry.getValue()))); 
     } 
    } 

    @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(); 

     mCurrentPaintParameters = new AbstractMap.SimpleImmutableEntry<DrawingPens, DrawingColors>(pen, mCurrentPaintParameters.getValue()); 

     mPaths.add(new AbstractMap.SimpleImmutableEntry<Path, Map.Entry<DrawingPens, DrawingColors>>(mCurrentPath, mCurrentPaintParameters)); 
    } 

    public void eraser() { 
     // Get default paint parameters 
     mCurrentPaintParameters = new AbstractMap.SimpleImmutableEntry<DrawingPens, DrawingColors>(DrawingPens.PEN_1, DrawingColors.BLACK); 
    } 

    public void setColor(final DrawingColors color) { 
     mCurrentPath = new Path(); 

     mCurrentPaintParameters = new AbstractMap.SimpleImmutableEntry<DrawingPens, DrawingColors>(mCurrentPaintParameters.getKey(), color); 

     mPaths.add(new AbstractMap.SimpleImmutableEntry<Path, Map.Entry<DrawingPens, DrawingColors>>(mCurrentPath, mCurrentPaintParameters)); 
    } 
} 

UPDATE（具有自定義顏色/寬度）：與您的代碼

問題在代碼不一致以及對Java Collections如何工作的錯誤理解。您不需要額外收集mPaths1，但是應該爲所有繪圖使用相同的集合並保留其他結構（在我們的示例中爲Map.Entry<DrawingPens, DrawingColors>），這些結構可以確切地標識Paint，並用於收集路徑。有關收藏的更多詳情，我建議從Oracle Trials開始。