MainActivity.java

public class MainActivity extends AppCompatActivity {

    int mActivePointerId = MotionEvent.INVALID_POINTER_ID;
    float mLastTouchX;
    float mLastTouchY;

    float mPosX = 0f;
    float mPosY = 0f;

    CViewN cview;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        cview = (CViewN) findViewById(R.id.cview_1);
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev){
        final int action = ev.getActionMasked();

        switch (action){
            case MotionEvent.ACTION_DOWN:
            {
                final int pointerIndex = ev.getActionIndex();
                final float x = ev.getX(pointerIndex);
                final float y = ev.getY(pointerIndex);

                // Remember where we started (for dragging)
                mLastTouchX = x;
                mLastTouchY = y;

                mActivePointerId = ev.getPointerId(pointerIndex);
                break;
            }

            case MotionEvent.ACTION_MOVE:
            {
                // Find the index of the active pointer and fetch its position
                final int pointerIndex = ev.findPointerIndex(mActivePointerId);

                final float x = ev.getX(pointerIndex);
                final float y = ev.getY(pointerIndex);

                // Calculate the distance moved
                final float dx = x - mLastTouchX;
                final float dy = y - mLastTouchY;

                mPosX += dx;
                mPosY += dy;

                // Remember this touch position for the next move event
                mLastTouchX = x;
                mLastTouchY = y;

                cview.setX((int) mPosX);
                cview.setY((int) mPosY);
                //invalidate();

                break;
            }

            case MotionEvent.ACTION_UP:
            {
                mActivePointerId = MotionEvent.INVALID_POINTER_ID;
                break;
            }

            case MotionEvent.ACTION_CANCEL:
            {
                mActivePointerId = MotionEvent.INVALID_POINTER_ID;
                break;
            }

            case MotionEvent.ACTION_POINTER_UP:
            {
                final int pointerIndex = ev.getActionIndex();
                final int pointerId = ev.getPointerId(pointerIndex);

                if(pointerId == mActivePointerId){
                    // This was our active pointer going up. Choose a new
                    // active pointer and adjust accordingly.

                    final int newPointerIndex = pointerIndex == 0 ? 1 : 0;

                    mLastTouchX = ev.getX(newPointerIndex);
                    mLastTouchY = ev.getY(newPointerIndex);
                    mActivePointerId = ev.getPointerId(newPointerIndex);
                }

                break;
            }
        }

        return true;
    }

}