SlideTrackSwitcher.java

package com.naman14.timber.utils;

import android.support.annotation.NonNull;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;

import com.naman14.timber.MusicPlayer;

/**
 * Created by nv95 on 02.11.16.
 */

public class SlideTrackSwitcher implements View.OnTouchListener {

    private static final int SWIPE_THRESHOLD = 200;
    private static final int SWIPE_VELOCITY_THRESHOLD = 100;

    private GestureDetector mDetector;
    private View mView;


    public SlideTrackSwitcher() {
    }

    public void attach(@NonNull View v) {
        mView = v;
        mDetector = new GestureDetector(v.getContext(), new SwipeListener());
        v.setOnTouchListener(this);
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        return mDetector.onTouchEvent(event);
    }

    private class SwipeListener extends GestureDetector.SimpleOnGestureListener {

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            boolean result = false;
            try {
                float diffY = e2.getY() - e1.getY();
                float diffX = e2.getX() - e1.getX();
                if (Math.abs(diffX) > Math.abs(diffY)) {
                    if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                        if (diffX > 0) {
                            onSwipeRight();
                        } else {
                            onSwipeLeft();
                        }
                    }
                    result = true;
                }
                else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                    if (diffY > 0) {
                        onSwipeBottom();
                    } else {
                        onSwipeTop();
                    }
                }
                result = true;

            } catch (Exception exception) {
                exception.printStackTrace();
            }
            return result;
        }

        @Override
        public boolean onDown(MotionEvent e) {
            return true;
        }

        @Override
        public boolean onDoubleTap(MotionEvent e) {
            MusicPlayer.playOrPause();
            return true;
        }

        @Override
        public boolean onSingleTapConfirmed(MotionEvent e) {
            onClick();
            return super.onSingleTapConfirmed(e);
        }
    }

    public void onSwipeRight() {
        MusicPlayer.previous(mView.getContext(), true);
    }

    public void onSwipeLeft() {
        MusicPlayer.next();
    }

    public void onSwipeTop() {
    }

    public void onSwipeBottom() {
    }

    public void onClick() {

    }
}