StackOverflow2013

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PO
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Id
20784618
data
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2013-12-26T12:12:22.360
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2013-12-26T12:12:22.360
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3021401
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text
Body
<p>It works but didn't Draw Path.</p> <pre><code>import android.app.Activity; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Bitmap.Config; import android.graphics.BlurMaskFilter.Blur; import android.graphics.BitmapFactory; import android.graphics.BlurMaskFilter; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.PorterDuff.Mode; import android.graphics.PorterDuffXfermode; import android.os.Bundle; import android.view.MotionEvent; import android.view.View; public class StartActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(new TouchView(this)); } class TouchView extends View{ Bitmap bgr; Bitmap overlayDefault; Bitmap overlay; Paint pTouch; int X = -100; int Y = -100; Canvas c2; public TouchView(Context context) { super(context); bgr = BitmapFactory.decodeResource(getResources(),R.drawable.bgr); overlayDefault = BitmapFactory.decodeResource(getResources(),R.drawable.over); overlay = BitmapFactory.decodeResource(getResources(),R.drawable.over).copy(Config.ARGB_8888, true); c2 = new Canvas(overlay); pTouch = new Paint(Paint.ANTI_ALIAS_FLAG); pTouch.setXfermode(new PorterDuffXfermode(Mode.SRC_OUT)); pTouch.setColor(Color.TRANSPARENT); pTouch.setMaskFilter(new BlurMaskFilter(15, Blur.NORMAL)); } @Override public boolean onTouchEvent(MotionEvent ev) { switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: { X = (int) ev.getX(); Y = (int) ev.getY(); invalidate(); break; } case MotionEvent.ACTION_MOVE: { X = (int) ev.getX(); Y = (int) ev.getY(); invalidate(); break; } case MotionEvent.ACTION_UP: break; } return true; } @Override public void onDraw(Canvas canvas){ super.onDraw(canvas); //draw background canvas.drawBitmap(bgr, 0, 0, null); //copy the default overlay into temporary overlay and punch a hole in it c2.drawBitmap(overlayDefault, 0, 0, null); //exclude this line to show all as you draw c2.drawCircle(X, Y, 80, pTouch); //draw the overlay over the background canvas.drawBitmap(overlay, 0, 0, null); } } } </code></pre>
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1. This table or related slice is empty.
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1. POMaking Overlaid image transparent on touch in Android?
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  PTQuestion
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1. PTAnswer
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1. This table or related slice is empty.
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1. USPranav
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