انشاء تطبيق رسم في سكيتشوير

 

الكود المستخدم

// خلق النشاط

dv = new DrawingView(this);

linear1.addView(dv);

mPaint = new Paint();

mPaint.setAntiAlias(true);

mPaint.setDither(true);

mPaint.setColor(Color.GREEN); 

mPaint.setStyle(Paint.Style.STROKE); 

mPaint.setStrokeJoin(Paint.Join.ROUND); 

mPaint.setStrokeCap(Paint.Cap.ROUND); 

mPaint.setStrokeWidth(12);

}

DrawingView dv; private Paint mPaint;

private Canvas mCanvas;

public class DrawingView extends View {

public int width;

public int height;

private Bitmap mBitmap;

private Path mPath;

private Paint mBitmapPaint;

Context context; private Paint circlePaint; private Path circlePath;

public DrawingView(Context c) {

super(c);

context=c;

mPath = new Path();

mBitmapPaint = new Paint(Paint.DITHER_FLAG); 

circlePaint = new Paint();

circlePath = new Path();

circlePaint.setAntiAlias(true);

circlePaint.setColor(Color.BLUE); 

circlePaint.setStyle(Paint.Style.STROKE); 

circlePaint.setStrokeJoin(Paint.Join.MITER); 

circlePaint.setStrokeWidth(4f);

}

@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) { super.onDraw(canvas); canvas.drawBitmap( mBitmap, 0, 0, mBitmapPaint);

canvas.drawPath( mPath, mPaint); canvas.drawPath( circlePath, circlePaint);

invalidate(); }

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; circlePath.reset(); circlePath.addCircle(mX, mY, 30, Path.Direction.CW); } }

private void touch_up() { mPath.lineTo(mX, mY); circlePath.reset();

mCanvas.drawPath(mPath, mPaint);

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; }

// زر المسح

mCanvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);