Java tutorial
/*- * Copyright (C) 2011 Peter Baldwin * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.peterbaldwin.vlcremote.fragment; import org.peterbaldwin.client.android.vlcremote.R; import org.peterbaldwin.vlcremote.net.MediaServer; import android.content.Context; import android.os.Bundle; import android.os.Vibrator; import android.support.v4.app.Fragment; import android.view.GestureDetector; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; public class NavigationFragment extends Fragment implements View.OnTouchListener, GestureDetector.OnGestureListener { private MediaServer mMediaServer; private GestureDetector mGestureDetector; @Override public View onCreateView(LayoutInflater inflater, ViewGroup root, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.navigation_fragment, root, false); Context context = view.getContext(); GestureDetector.OnGestureListener listener = this; mGestureDetector = new GestureDetector(context, listener); view.findViewById(R.id.overlay).setOnTouchListener(this); return view; } public void setMediaServer(MediaServer mediaServer) { mMediaServer = mediaServer; } /** {@inheritDoc} */ public boolean onTouch(View v, MotionEvent event) { return mGestureDetector.onTouchEvent(event); } /** {@inheritDoc} */ public boolean onSingleTapUp(MotionEvent e) { mMediaServer.status().command.key("nav-activate"); vibrate(); return true; } /** {@inheritDoc} */ public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { if (Math.abs(velocityX) > Math.abs(velocityY)) { if (velocityX > 0) { mMediaServer.status().command.key("nav-right"); vibrate(); return true; } else if (velocityX < 0) { mMediaServer.status().command.key("nav-left"); vibrate(); return true; } } else if (Math.abs(velocityY) > Math.abs(velocityX)) { if (velocityY > 0) { mMediaServer.status().command.key("nav-down"); vibrate(); return true; } else if (velocityY < 0) { mMediaServer.status().command.key("nav-up"); vibrate(); return true; } } return false; } @SuppressWarnings("unchecked") private <T> T getSystemService(String name) { Context context = getActivity(); return (T) context.getSystemService(name); } private void vibrate() { Vibrator v = getSystemService(Context.VIBRATOR_SERVICE); if (v != null) { v.vibrate(100); } } /** {@inheritDoc} */ public boolean onDown(MotionEvent e) { return false; } /** {@inheritDoc} */ public void onShowPress(MotionEvent e) { } /** {@inheritDoc} */ public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { return false; } /** {@inheritDoc} */ public void onLongPress(MotionEvent e) { } }