How to detect single touch as well as multi-touch in onTouchEvent()

Question

I used the following code to detect the single finger touch and double finger touch. The code detects the double finger touch (when count==2).

I need t

Answer 1

Here is the code for detecting points and drawing each points in different color get compete example here

public class custom_view extends View {



private Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);

public int cu = 0;



final int MAX_NUMBER_OF_POINT = 10;

float[] x = new float[MAX_NUMBER_OF_POINT];

float[] y = new float[MAX_NUMBER_OF_POINT];

boolean[] touching = new boolean[MAX_NUMBER_OF_POINT];



public custom_view(Context context, AttributeSet attrs, int defStyle) {

    super(context, attrs, defStyle);

    init();

}

public custom_view(Context context, AttributeSet attrs) {

    super(context, attrs);

    init();

}



public custom_view(Context context) {

    super(context);

    init();

}

void init() {

    paint.setStyle(Paint.Style.STROKE);

    paint.setStrokeWidth(40);

}

@Override

protected void onDraw(Canvas canvas) {

    for (int i = 0; i < MAX_NUMBER_OF_POINT; i++) {

        if (touching[i]) {

            switch (i) {

            case 1:

                paint.setColor(Color.BLUE);

                break;

            case 2:

                paint.setColor(Color.RED);

                break;

            case 3:

                paint.setColor(Color.CYAN);

                break;

            case 4:

                paint.setColor(Color.GREEN);

                break;

            case 5:

                paint.setColor(Color.YELLOW);

                break;

            case 6:

                paint.setColor(Color.MAGENTA);

                break;

            case 7:

                paint.setColor(Color.DKGRAY);

                break;

            case 8:

                paint.setColor(Color.LTGRAY);

                break;

            case 9:

                paint.setColor(Color.GREEN);

                break;

            case 10:

                paint.setColor(Color.BLACK);



                break;

                }

            canvas.drawCircle(x[i], y[i], 70f, paint);

        }

    }

}

@Override

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

    setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec),

            MeasureSpec.getSize(heightMeasureSpec));

}

@Override

public boolean onTouchEvent(MotionEvent event) {

    int action = (event.getAction() & MotionEvent.ACTION_MASK);

    int pointCount = event.getPointerCount();

    for (int i = 0; i < pointCount; i++) {

        int id = event.getPointerId(i);



        if (id < MAX_NUMBER_OF_POINT) {

            x[id] = (int) event.getX(i);

            y[id] = (int) event.getY(i);



            if ((action == MotionEvent.ACTION_DOWN)

                    || (action == MotionEvent.ACTION_POINTER_DOWN)

                    || (action == MotionEvent.ACTION_MOVE)) {

                touching[id] = true;

            } else {

                touching[id] = false;

                }

        }

    }

    invalidate();

    return true;

}

}