title: Canvas Drawing is not resetting on button click
body: <p>Canvas Painting is not reset when Click ,It is reset when I am drawing again on canvas after click the clear button.............................................................................................................................................................................................................................................................................................................................................................................
  HERE IS MY CODE </p>
  
  <pre><code>public class Practice extends FragmentActivity {
      private RelativeLayout relativeLayout;
      private Paint paint;
      ImageView back;
      private View view;
      private Path path2;
      private Bitmap bitmap;
      private Canvas canvas;
      private Button button;
      public int width, height;
  
      @Override
      protected void onCreate(final Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_practice);
          back = findViewById(R.id.back);
          relativeLayout = (RelativeLayout) findViewById(R.id.relativelayout1);
          back.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View v) {
                  onBackPressed();
              }
          });
          button = (Button) findViewById(R.id.button);
  
          view = new SketchSheetView(Practice.this);
  
          paint = new Paint();
  
          path2 = new Path();
  
          relativeLayout.addView(view, new RelativeLayout.LayoutParams(
                  RelativeLayout.LayoutParams.WRAP_CONTENT,
                  RelativeLayout.LayoutParams.WRAP_CONTENT));
  
          paint.setDither(true);
  
          paint.setColor(Color.parseColor("#FFFFFF"));
  
          paint.setStyle(Paint.Style.STROKE);
  
          paint.setStrokeJoin(Paint.Join.MITER);
  
          paint.setStrokeCap(Paint.Cap.BUTT);
  
          paint.setStrokeWidth(5);
  
          button.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View v) {
                  path2.reset();
              }
          });
  
      }
  
      class SketchSheetView extends View {
  
          public SketchSheetView(Context context) {
  
              super(context);
  
              bitmap = Bitmap.createBitmap(100, 200, Bitmap.Config.ARGB_4444);
  
              canvas = new Canvas(bitmap);
              this.setBackground(getResources().getDrawable(R.drawable.ic_brush_black_24dp));
          }
  
          private ArrayList&lt;DrawingClass&gt; DrawingClassArrayList = new ArrayList&lt;DrawingClass&gt;();
  
          @Override
          public boolean onTouchEvent(MotionEvent event) {
              Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
  
              DrawingClass pathWithPaint = new DrawingClass();
              canvas.drawPath(path2, paint);
  
              if (event.getAction() == MotionEvent.ACTION_DOWN) {
                  this.setBackground(null);
                  vibrator.vibrate(500);
                  path2.moveTo(event.getX(), event.getY());
  
                  path2.lineTo(event.getX(), event.getY());
              } else if (event.getAction() == MotionEvent.ACTION_MOVE) {
                  this.setBackground(null);
                  path2.lineTo(event.getX(), event.getY());
                  vibrator.vibrate(500);
  
                  pathWithPaint.setPath(path2);
  
                  pathWithPaint.setPaint(paint);
  
                  DrawingClassArrayList.add(pathWithPaint);
              }
  
              invalidate();
              return true;
          }
  
          @Override
          protected void onDraw(Canvas canvas) {
              super.onDraw(canvas);
              if (DrawingClassArrayList.size() &gt; 0) {
  
                  canvas.drawPath(
  
  
                          DrawingClassArrayList.get(DrawingClassArrayList.size() - 1).getPath(),
  
                          DrawingClassArrayList.get(DrawingClassArrayList.size() - 1).getPaint()
  
                  );
              }
          }
      }
  
      public class DrawingClass {
  
          Path DrawingClassPath;
          Paint DrawingClassPaint;
  
          public Path getPath() {
              return DrawingClassPath;
          }
  
          public void setPath(Path path) {
              this.DrawingClassPath = path;
  
          }
  
  
          public Paint getPaint() {
              return DrawingClassPaint;
          }
  
          public void setPaint(Paint paint) {
              this.DrawingClassPaint = paint;
          }
      }
  
      @Override
      public void onBackPressed() {
          super.onBackPressed();
      }
  </code></pre>