MusicPlayerFragment.java

package com.integreight.onesheeld.shields.fragments;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.TextView;

import com.integreight.onesheeld.R;
import com.integreight.onesheeld.shields.ShieldFragmentParent;
import com.integreight.onesheeld.shields.controller.MusicShield;
import com.integreight.onesheeld.shields.controller.MusicShield.MusicEventHandler;
import com.integreight.onesheeld.shields.fragments.sub.MusicShieldSettings;
import com.integreight.onesheeld.utils.Log;

public class MusicPlayerFragment extends
        ShieldFragmentParent<MusicPlayerFragment> {
    SeekBar seekBar;
    TextView musicFileName, playingStatus;
    ImageView playingBtn;
    Thread seekBarTracker;
    private boolean isTracking = false;

    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        hasSettings = true;
        return inflater.inflate(R.layout.musicplayer_shield_fragment_layout,
                container, false);
    }

    @Override
    public void doOnStart() {
        activity.getSupportFragmentManager()
                .beginTransaction()
                .replace(R.id.settingsViewContainer,
                        MusicShieldSettings.getInstance()).commit();
        startTracking();
    }

    private void stopTracking() {
        if (seekBarTracker != null && seekBarTracker.isAlive()) {
            isTracking = false;
            seekBarTracker.interrupt();
            seekBarTracker = null;
        }
    }

    private void startTracking() {
        stopTracking();
        isTracking = true;
        seekBarTracker = new Thread(new Runnable() {

            @Override
            public void run() {
                while (isTracking) {
                    if ((MusicShield) getApplication().getRunningShields().get(
                            getControllerTag()) != null
                            && ((MusicShield) getApplication()
                            .getRunningShields()
                            .get(getControllerTag())).mediaPlayer != null) {
                        seekBar.setMax(((MusicShield) getApplication()
                                .getRunningShields().get(getControllerTag())).mediaDuration);
                        try {
                            seekBar.setProgress(((MusicShield) getApplication()
                                    .getRunningShields()
                                    .get(getControllerTag())).mediaPlayer
                                    .getCurrentPosition());
                        } catch (IllegalStateException e) {
                        }
                    }
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        Log.e("TAG", "MusicPlayer::seekBarTracker", e);
                        break;
                    }

                }
            }
        });
        seekBarTracker.start();
    }

    @Override
    public void doOnResume() {
        MusicShield control = (MusicShield) getApplication()
                .getRunningShields().get(getControllerTag());
        if (control != null) {
            ((MusicShield) getApplication().getRunningShields().get(
                    getControllerTag())).setEventHandler(eventHandler);
            control = (MusicShield) getApplication().getRunningShields().get(
                    getControllerTag());
            if (control.mediaPlayer != null && control.mediaDuration > 0) {
                eventHandler.seekTo(control.mediaPlayer.getCurrentPosition()
                        * 100 / control.mediaDuration);
                eventHandler.setMusicName(control.musicFileName);
                if (control.mediaPlayer.isPlaying())
                    eventHandler.play();
                else
                    eventHandler.pause();
            } else {
                eventHandler.seekTo(0);
                eventHandler.pause();
                eventHandler.setMusicName("");
            }
        }
    }

    @Override
    public void doOnStop() {
        stopTracking();
    }

    MusicEventHandler eventHandler = new MusicEventHandler() {

        @Override
        public void setMusicName(final String name) {

            uiHandler.post(new Runnable() {

                @Override
                public void run() {
                    if (canChangeUI())
                        musicFileName.setText(name);
                }
            });
        }

        @Override
        public void seekTo(final int pos) {
            uiHandler.post(new Runnable() {

                @Override
                public void run() {
                    if (canChangeUI()) {
                        seekBar.setMax(((MusicShield) getApplication()
                                .getRunningShields().get(getControllerTag())).mediaDuration);
                        seekBar.setProgress(pos);
                    }
                }
            });
        }

        @Override
        public void play() {
            uiHandler.post(new Runnable() {

                @Override
                public void run() {
                    if (canChangeUI()) {
                        playingBtn
                                .setBackgroundResource(R.drawable.musicplayer_play_symbol);
                        playingStatus.setText(R.string.music_player_playing);
                    }
                }
            });
        }

        @Override
        public void pause() {
            uiHandler.post(new Runnable() {

                @Override
                public void run() {
                    if (canChangeUI()) {
                        playingBtn
                                .setBackgroundResource(R.drawable.musicplayer_pause_symbol);
                        playingStatus.setText(R.string.music_player_paused);
                    }
                }
            });
        }
    };

    @Override
    public void doOnViewCreated(View v, @Nullable Bundle savedInstanceState) {
        musicFileName = (TextView) v.findViewById(R.id.playingMusic);
        seekBar = (SeekBar) v.findViewById(R.id.seekBar);
        playingBtn = (ImageView) v.findViewById(R.id.playingBtn);
        playingStatus = (TextView) v.findViewById(R.id.playingStatus);
        hasSettings = true;
    }
}