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POdraw on canvas in different device has different smoothness
 

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  1. POdraw on canvas in different device has different smoothness
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    <p>In my application i am used canvas to draw a letter. my code is working .</p> <p>But my problem is smoothness in different devices.</p> <p>I am put screen short </p> <p>1)screen short take from samsung tab 2 7 inch <img src="https://i.stack.imgur.com/g6Q5R.png" alt="enter image description here"></p> <p><img src="https://i.stack.imgur.com/aKh3E.png" alt="enter image description here"></p> <p>2) screen short take from google nexus 7 inch.</p> <p>What is the problem in samsung device why smoothness not working .</p> <p>I am also download such type of drawing application but not properly working in samsung device.</p> <p>Please help me . </p> <p>Below code is used for paint </p> <pre><code>class MyTView extends View { private Canvas mCanvas; private Path mPath; private Paint mBitmapPaint; private Matrix matrix = new Matrix(); private float mX, mY; private static final float TOUCH_TOLERANCE = 4; public MyTView(Context c) { super(c); mBitmap = Bitmap.createBitmap(display.getWidth(), display.getHeight(), Bitmap.Config.ARGB_8888); mCanvas = new Canvas(mBitmap); // set canvas background color white Paint paint = new Paint(); // paint.setColor(Color.WHITE); paint.setStyle(Style.FILL); mCanvas.drawPaint(paint); mPath = new Path(); mBitmapPaint = new Paint(Paint.DITHER_FLAG); } public MyTView(Context c, AttributeSet atrs ) { super(c, atrs); mBitmap = Bitmap.createBitmap(display.getWidth(), display.getHeight(), Bitmap.Config.ARGB_8888); // mBitmap = Bitmap.createBitmap(display.getWidth(), display.getHeight(), Bitmap.Config.ARGB_8888); mCanvas = new Canvas(mBitmap); mPath = new Path(); mBitmapPaint = new Paint(Paint.DITHER_FLAG); } public MyTView(Context c,Bitmap bmp ) { super(c); mBitmap = Bitmap.createBitmap(display.getWidth(), display.getHeight(), Bitmap.Config.ARGB_8888); mCanvas = new Canvas(mBitmap); mPath = new Path(); mBitmapPaint = new Paint(Paint.DITHER_FLAG); mCanvas.drawBitmap(bmp, 0, 0,null); } protected void onDraw(Canvas canvas) { //canvas.drawBitmap(mBitmap, 0, 0, mTPaint); // ORIGINAL canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint); // ORIGINAL canvas.drawPath(mPath, mTPaint); } public void touch_start(float x, float y) { arrXY.clear(); mPath.moveTo(x, y); mX = x; mY = y; arrXY.add(new XYBean(x, y)); } public void touch_move(float x, float y) { arrXY.add(new XYBean(x, y)); float dx = Math.abs(x - mX); float dy = Math.abs(y - mY); if (dx &gt;= TOUCH_TOLERANCE || dy &gt;= TOUCH_TOLERANCE) { mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2); mX = x; mY = y; } } private void touch_up() { btn_replay.setBackgroundResource(R.drawable.button_blue); btn_replay.setTextColor(Color.parseColor("#FFFFFF")); System.out.println("--- touch up event ------"); mPath.lineTo(mX, mY); // commit the path to our offscreen mCanvas.drawPath(mPath, mTPaint); mPath.reset(); getScreenCap(drawLayout); } // mCanvas.drawPath(mPath, mPaint); ++count; isSet = false; //arrXY.clear(); System.out.println("After clearing the arrXY: "+arrXY.size()); isStart = true; postInvalidate(); } @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(); mCanvas.drawPath(mPath, mTPaint); // edited by shreyash break; case MotionEvent.ACTION_MOVE: touch_move(x, y); invalidate(); mCanvas.drawPath(mPath, mTPaint); // edited by shreyash break; case MotionEvent.ACTION_UP: touch_up(); invalidate(); // arrXY.clear(); break; } return true; } } </code></pre>
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    2. COi think there is problem in samsung modified ANDROID OS
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    3. CO@JatinPatel how to solve my problem.
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