मुझे उंगलियों द्वारा कैनवास पर ड्राइंग के लिए एक परियोजना बनाने की आवश्यकता है,
मेरी अंगुली की स्पर्श घटना और गति घटना और थ्रो ड्रॉ पाने के लिए।
कोई भी मुझे सलाह दे सकता है कि परियोजना में कैसे शुरुआत करें,
और इस तरह से काम करने के लिए सबसे अच्छा घटक क्या है?
जवाबों:
Sdk नमूने में फ़िंगरपैंट डेमो के माध्यम से प्रारंभ करें।
एक अन्य नमूना:
public class MainActivity extends Activity {
DrawingView dv ;
private Paint mPaint;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
dv = new DrawingView(this);
setContentView(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);
}
public class DrawingView extends View {
public int width;
public int height;
private Bitmap mBitmap;
private Canvas mCanvas;
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);
}
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();
// 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;
}
}
}स्नैप शॉट
स्पष्टीकरण:
आप एक व्यू क्लास बना रहे हैं, फिर व्यू बढ़ाएं। आप ऑनड्राइव () को ओवरराइड करें। आप उस जगह को जोड़ते हैं जहां उंगली छूती है और चलती है। आप इस उद्देश्य के onTouch () को ओवरराइड करते हैं। अपने onDraw () में आप अपनी पसंद के पेंट का उपयोग करके रास्ते बनाते हैं। दृश्य को ताज़ा करने के लिए आपको अमान्य () कॉल करना चाहिए।
विकल्प चुनने के लिए आप मेनू पर क्लिक कर सकते हैं और विकल्प चुन सकते हैं।
नीचे एक संदर्भ के रूप में इस्तेमाल किया जा सकता है। आप अपनी आवश्यकताओं के अनुसार नीचे संशोधित कर सकते हैं।
public class FingerPaintActivity extends Activity
implements ColorPickerDialog.OnColorChangedListener {
MyView mv;
AlertDialog dialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mv= new MyView(this);
mv.setDrawingCacheEnabled(true);
mv.setBackgroundResource(R.drawable.afor);//set the back ground if you wish to
setContentView(mv);
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(20);
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;
Context context;
public MyView(Context c) {
super(c);
context=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) {
super.onDraw(canvas);
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) {
//showDialog();
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();
mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SCREEN));
//mPaint.setMaskFilter(null);
}
@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;
private static final int Save = Menu.FIRST + 5;
@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');
menu.add(0, Save, 0, "Save").setShortcut('5', 'z');
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));
mPaint.setAlpha(0x80);
return true;
case SRCATOP_MENU_ID:
mPaint.setXfermode(new PorterDuffXfermode(
PorterDuff.Mode.SRC_ATOP));
mPaint.setAlpha(0x80);
return true;
case Save:
AlertDialog.Builder editalert = new AlertDialog.Builder(FingerPaintActivity.this);
editalert.setTitle("Please Enter the name with which you want to Save");
final EditText input = new EditText(FingerPaintActivity.this);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.FILL_PARENT);
input.setLayoutParams(lp);
editalert.setView(input);
editalert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
String name= input.getText().toString();
Bitmap bitmap = mv.getDrawingCache();
String path = Environment.getExternalStorageDirectory().getAbsolutePath();
File file = new File("/sdcard/"+name+".png");
try
{
if(!file.exists())
{
file.createNewFile();
}
FileOutputStream ostream = new FileOutputStream(file);
bitmap.compress(CompressFormat.PNG, 10, ostream);
ostream.close();
mv.invalidate();
}
catch (Exception e)
{
e.printStackTrace();
}finally
{
mv.setDrawingCacheEnabled(false);
}
}
});
editalert.show();
return true;
}
return super.onOptionsItemSelected(item);
}
}रंग चयनकर्ता
public class ColorPickerDialog extends Dialog {
public interface OnColorChangedListener {
void colorChanged(int color);
}
private OnColorChangedListener mListener;
private int mInitialColor;
private static class ColorPickerView extends View {
private Paint mPaint;
private Paint mCenterPaint;
private final int[] mColors;
private OnColorChangedListener mListener;
ColorPickerView(Context c, OnColorChangedListener l, int color) {
super(c);
mListener = l;
mColors = new int[] {
0xFFFF0000, 0xFFFF00FF, 0xFF0000FF, 0xFF00FFFF, 0xFF00FF00,
0xFFFFFF00, 0xFFFF0000
};
Shader s = new SweepGradient(0, 0, mColors, null);
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setShader(s);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(32);
mCenterPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mCenterPaint.setColor(color);
mCenterPaint.setStrokeWidth(5);
}
private boolean mTrackingCenter;
private boolean mHighlightCenter;
@Override
protected void onDraw(Canvas canvas) {
float r = CENTER_X - mPaint.getStrokeWidth()*0.5f;
canvas.translate(CENTER_X, CENTER_X);
canvas.drawOval(new RectF(-r, -r, r, r), mPaint);
canvas.drawCircle(0, 0, CENTER_RADIUS, mCenterPaint);
if (mTrackingCenter) {
int c = mCenterPaint.getColor();
mCenterPaint.setStyle(Paint.Style.STROKE);
if (mHighlightCenter) {
mCenterPaint.setAlpha(0xFF);
} else {
mCenterPaint.setAlpha(0x80);
}
canvas.drawCircle(0, 0,
CENTER_RADIUS + mCenterPaint.getStrokeWidth(),
mCenterPaint);
mCenterPaint.setStyle(Paint.Style.FILL);
mCenterPaint.setColor(c);
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
setMeasuredDimension(CENTER_X*2, CENTER_Y*2);
}
private static final int CENTER_X = 100;
private static final int CENTER_Y = 100;
private static final int CENTER_RADIUS = 32;
private int floatToByte(float x) {
int n = java.lang.Math.round(x);
return n;
}
private int pinToByte(int n) {
if (n < 0) {
n = 0;
} else if (n > 255) {
n = 255;
}
return n;
}
private int ave(int s, int d, float p) {
return s + java.lang.Math.round(p * (d - s));
}
private int interpColor(int colors[], float unit) {
if (unit <= 0) {
return colors[0];
}
if (unit >= 1) {
return colors[colors.length - 1];
}
float p = unit * (colors.length - 1);
int i = (int)p;
p -= i;
// now p is just the fractional part [0...1) and i is the index
int c0 = colors[i];
int c1 = colors[i+1];
int a = ave(Color.alpha(c0), Color.alpha(c1), p);
int r = ave(Color.red(c0), Color.red(c1), p);
int g = ave(Color.green(c0), Color.green(c1), p);
int b = ave(Color.blue(c0), Color.blue(c1), p);
return Color.argb(a, r, g, b);
}
private int rotateColor(int color, float rad) {
float deg = rad * 180 / 3.1415927f;
int r = Color.red(color);
int g = Color.green(color);
int b = Color.blue(color);
ColorMatrix cm = new ColorMatrix();
ColorMatrix tmp = new ColorMatrix();
cm.setRGB2YUV();
tmp.setRotate(0, deg);
cm.postConcat(tmp);
tmp.setYUV2RGB();
cm.postConcat(tmp);
final float[] a = cm.getArray();
int ir = floatToByte(a[0] * r + a[1] * g + a[2] * b);
int ig = floatToByte(a[5] * r + a[6] * g + a[7] * b);
int ib = floatToByte(a[10] * r + a[11] * g + a[12] * b);
return Color.argb(Color.alpha(color), pinToByte(ir),
pinToByte(ig), pinToByte(ib));
}
private static final float PI = 3.1415926f;
@Override
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX() - CENTER_X;
float y = event.getY() - CENTER_Y;
boolean inCenter = java.lang.Math.sqrt(x*x + y*y) <= CENTER_RADIUS;
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mTrackingCenter = inCenter;
if (inCenter) {
mHighlightCenter = true;
invalidate();
break;
}
case MotionEvent.ACTION_MOVE:
if (mTrackingCenter) {
if (mHighlightCenter != inCenter) {
mHighlightCenter = inCenter;
invalidate();
}
} else {
float angle = (float)java.lang.Math.atan2(y, x);
// need to turn angle [-PI ... PI] into unit [0....1]
float unit = angle/(2*PI);
if (unit < 0) {
unit += 1;
}
mCenterPaint.setColor(interpColor(mColors, unit));
invalidate();
}
break;
case MotionEvent.ACTION_UP:
if (mTrackingCenter) {
if (inCenter) {
mListener.colorChanged(mCenterPaint.getColor());
}
mTrackingCenter = false; // so we draw w/o halo
invalidate();
}
break;
}
return true;
}
}
public ColorPickerDialog(Context context,
OnColorChangedListener listener,
int initialColor) {
super(context);
mListener = listener;
mInitialColor = initialColor;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
OnColorChangedListener l = new OnColorChangedListener() {
public void colorChanged(int color) {
mListener.colorChanged(color);
dismiss();
}
};
setContentView(new ColorPickerView(getContext(), l, mInitialColor));
setTitle("Pick a Color");
}
}Canvas mCanvas? क्योंकि आप का उपयोगonDraw(Canvas canvas)
ऊपर रघुनंदन के सुंदर कोड के बारे में।
कई ने पूछा है कि ड्राइंग को "स्पष्ट" कैसे किया जाए। यहाँ है कि कैसे करना है:
public void clearDrawing()
{
Utils.Log("RaghunandanDraw, how to clear....");
setDrawingCacheEnabled(false);
// don't forget that one and the match below,
// or you just keep getting a duplicate when you save.
onSizeChanged(width, height, width, height);
invalidate();
setDrawingCacheEnabled(true);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh)
{
super.onSizeChanged(w, h, oldw, oldh);
width = w; // don't forget these
height = h;
mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
}कई ने पूछा है कि ड्राइंग को "कैसे" सहेजें। यहाँ है कि कैसे करना है:
public DrawingView(Context c)
{
circlePaint.setStrokeJoin(Paint.Join.MITER);
circlePaint.setStrokeWidth(4f);
etc...
// in the class where you set up the view, add this:
setDrawingCacheEnabled( true );
}
public void saveDrawing()
{
Bitmap whatTheUserDrewBitmap = getDrawingCache();
// don't forget to clear it (see above) or you just get duplicates
// almost always you will want to reduce res from the very high screen res
whatTheUserDrewBitmap =
ThumbnailUtils.extractThumbnail(whatTheUserDrewBitmap, 256, 256);
// NOTE that's an incredibly useful trick for cropping/resizing squares
// while handling all memory problems etc
// http://stackoverflow.com/a/17733530/294884
// you can now save the bitmap to a file, or display it in an ImageView:
ImageView testArea = ...
testArea.setImageBitmap( whatTheUserDrewBitmap );
// these days you often need a "byte array". for example,
// to save to parse.com or other cloud services
ByteArrayOutputStream baos = new ByteArrayOutputStream();
whatTheUserDrewBitmap.compress(Bitmap.CompressFormat.PNG, 0, baos);
byte[] yourByteArray;
yourByteArray = baos.toByteArray();
}आशा है कि यह किसी की मदद करता है क्योंकि इसने मेरी मदद की है।
clearDrawingविधि शामिल है मुझे इसकी अपवाद के कारण ऊंचाई और चौड़ाई होनी चाहिए> 0. मैंने कोड को देखा और देखा कि ये चर सेट नहीं हैं। तो मैंने आपसे पूछा कि आपको चौड़ाई और ऊंचाई के मूल्य कैसे मिलते हैं। पुनश्च आपको कॉल करना है invalidate()यदि आप ड्राइंग क्षेत्र को ताज़ा करना चाहते हैं!
आप इस वर्ग का उपयोग कर सकते हैं:
public class DoodleCanvas extends View{
private Paint mPaint;
private Path mPath;
public DoodleCanvas(Context context, AttributeSet attrs) {
super(context, attrs);
mPaint = new Paint();
mPaint.setColor(Color.RED);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(10);
mPath = new Path();
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawPath(mPath, mPaint);
super.onDraw(canvas);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()){
case MotionEvent.ACTION_DOWN:
mPath.moveTo(event.getX(), event.getY());
break;
case MotionEvent.ACTION_MOVE:
mPath.lineTo(event.getX(), event.getY());
invalidate();
break;
case MotionEvent.ACTION_UP:
break;
}
return true;
}
}बिटमैप, कैनवस, और पेंट क्लास का उपयोग करने के लिए ट्यूटोरियल। आकर्षित लाइन-ऑन-उंगली स्पर्श और एंड्रॉइडट्रैक
नीचे दिखाने के रूप में कैनवास का उपयोग करके रेखा खींचने के लिए एक सरल वर्ग।
public class TestLineView extends View {
private Paint paint;
private PointF startPoint, endPoint;
private boolean isDrawing;
public TestLineView(Context context)
{
super(context);
init();
}
private void init()
{
paint = new Paint();
paint.setColor(Color.RED);
paint.setStyle(Style.STROKE);
paint.setStrokeWidth(2);
paint.setAntiAlias(true);
}
@Override
protected void onDraw(Canvas canvas)
{
if(isDrawing)
{
canvas.drawLine(startPoint.x, startPoint.y, endPoint.x, endPoint.y, paint);
}
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
switch (event.getAction())
{
case MotionEvent.ACTION_DOWN:
startPoint = new PointF(event.getX(), event.getY());
endPoint = new PointF();
isDrawing = true;
break;
case MotionEvent.ACTION_MOVE:
if(isDrawing)
{
endPoint.x = event.getX();
endPoint.y = event.getY();
invalidate();
}
break;
case MotionEvent.ACTION_UP:
if(isDrawing)
{
endPoint.x = event.getX();
endPoint.y = event.getY();
isDrawing = false;
invalidate();
}
break;
default:
break;
}
return true;
}
}मुझे लगता है कि किसी चीज़ को जोड़ना महत्वपूर्ण है, यदि आप लेआउट मुद्रास्फीति का उपयोग करते हैं जो कि ड्रॉअर में कंस्ट्रक्टर सही नहीं है, तो क्लास में इन कंस्ट्रक्टरों को जोड़ें:
public DrawingView(Context c, AttributeSet attrs) {
super(c, attrs);
...
}
public DrawingView(Context c, AttributeSet attrs, int defStyle) {
super(c, attrs, defStyle);
...
}या एंड्रॉइड सिस्टम लेआउट फ़ाइल को बढ़ाने में विफल रहता है। मुझे उम्मीद है कि यह मदद कर सकता है।
इशान के जवाब के अलावा, यदि आप उपयोगकर्ता की बातचीत के बिना प्रोग्राम बनाना चाहते हैं, तो आप कक्षा को इस तरह थोड़े ही संपादित कर सकते हैं।
public class DrawingCanvas extends View {
private Paint mPaint;
private Path mPath;
private boolean isUserInteractionEnabled = false;
public DrawingCanvas(Context context, AttributeSet attrs) {
super(context, attrs);
mPaint = new Paint();
mPaint.setColor(Color.RED);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(10);
mPath = new Path();
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawPath(mPath, mPaint);
super.onDraw(canvas);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (isUserInteractionEnabled) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mPath.moveTo(event.getX(), event.getY());
break;
case MotionEvent.ACTION_MOVE:
mPath.lineTo(event.getX(), event.getY());
invalidate();
break;
case MotionEvent.ACTION_UP:
break;
}
}
return true;
}
public void moveCursorTo(float x, float y) {
mPath.moveTo(x, y);
}
public void makeLine(float toX, float toY) {
mPath.lineTo(toX, toY);
}
public void setUserInteractionEnabled(boolean userInteractionEnabled) {
isUserInteractionEnabled = userInteractionEnabled;
}
}और फिर इसे उपयोग करें
drawingCanvas.setUserInteractionEnabled(true) // to enable user interaction
drawingCanvas.setUserInteractionEnabled(true) // to disable user interactionप्रोग्राम करने के लिए ड्रा
drawingCanvas.moveCursorTo(70f, 70f) // Move the cursor (Define starting point)
drawingCanvas.makeLine(200f, 200f) // End point (To where you need to draw)