Styjun

Hello friends i am creating mp3 player i want controll music from
background using notification services notification works fine but i
dont know how to controll media player using notification service
please help me i am beginner dont know how controll from background please help how to fixed this problem i want get rid this problem?

MainActivity.java

package music.playerforandroid;

import android.Manifest;
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.MediaPlayer;
import android.net.sip.SipSession;
import android.os.Build;
import android.os.Handler;
import android.os.Message;
import android.provider.MediaStore;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.NotificationManagerCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v4.media.session.MediaSessionCompat;
import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Random;
import java.util.concurrent.TimeUnit;

import android.net.Uri;
import android.content.ContentResolver;
import android.database.Cursor;
import android.text.Editable;
import android.text.TextWatcher;
import android.text.format.DateUtils;
import android.util.Log;
import android.view.View;
import android.view.WindowManager;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.widget.AdapterView;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RemoteViews;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;

import com.cleveroad.audiovisualization.AudioVisualization;
import com.cleveroad.audiovisualization.DbmHandler;
import com.cleveroad.audiovisualization.GLAudioVisualizationView;
import com.cleveroad.audiovisualization.VisualizerDbmHandler;
import com.gc.materialdesign.utils.Utils;
import com.karumi.dexter.Dexter;
import com.karumi.dexter.MultiplePermissionsReport;
import com.karumi.dexter.PermissionToken;
import com.karumi.dexter.listener.PermissionRequest;
import com.karumi.dexter.listener.multi.MultiplePermissionsListener;
import com.sothree.slidinguppanel.SlidingUpPanelLayout;
import static music.playerforandroid.App.CHANNEL_2_ID;

public class MainActivity extends AppCompatActivity implements SeekBar.OnSeekBarChangeListener 
 private ArrayList<Song> songList;
 private ListView songView;
 MediaPlayer mediaPlayer;

 private int currentSongIndex = 0;
 Song song;
 private SlidingUpPanelLayout slidingLayout;
 Context mContext;
 private Utilities utils;
 private int seekForwardTime = 5000; // 5000 milliseconds
 private int seekBackwardTime = 5000;
 private AudioVisualization audioVisualization;
 private VisualizerDbmHandler handler;
 int postion;
 int totalduration;
 int totalTime;
 SeekBar seekBar;
 private Handler mHandler = new Handler();
private NotificationManagerCompat notificationManager;
 Uri uri;
 ImageView rotate;
 private long currentsongLength;
 TextView elapsedTimeLabel, remainingTimeLabel;
 TextView title, artist;
 ImageView playchange;
 ImageButton like, notlike, dislike, notdislike, next, pervious, repeat, reaptenable;
 ImageButton play, pause, play_main, pause_main, shuffle, shufflenable;
 private SlidingUpPanelLayout mLayout;
 private boolean isShuffle;
 private boolean checked;

 private static final String CHANNEL_ID = "channel_id01";
 public static final int NOTIFICATION_ID = 1;


 @Override
 protected void onCreate(final Bundle savedInstanceState) 
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 runtimpermession();
 songView = findViewById(R.id.song_list);
 songList = new ArrayList<Song>();

 artist = findViewById(R.id.artist);
 title = findViewById(R.id.songname);







 elapsedTimeLabel = findViewById(R.id.songtime);
 remainingTimeLabel = findViewById(R.id.endTime);
 seekBar = findViewById(R.id.seekBar3);
 next = findViewById(R.id.next);
 pervious = findViewById(R.id.pervious);
 like = findViewById(R.id.imageButton2);
 notlike = findViewById(R.id.imageButton2new);
 dislike = findViewById(R.id.button);
 notdislike = findViewById(R.id.buttontwo);
 play = findViewById(R.id.play_button);
 repeat = findViewById(R.id.repeat);
 reaptenable = findViewById(R.id.repeatenable);
 pause = findViewById(R.id.pause_button);
 play_main = findViewById(R.id.play_button_main);
 pause_main = findViewById(R.id.pause_button_main);
 like = findViewById(R.id.imageButton2);
 notlike = findViewById(R.id.imageButton2new);
 dislike = findViewById(R.id.button);
 notdislike = findViewById(R.id.buttontwo);
 play = findViewById(R.id.play_button);

 pause = findViewById(R.id.pause_button);
 shuffle = findViewById(R.id.shuffle);
 shufflenable = findViewById(R.id.shufflenable);
 elapsedTimeLabel = findViewById(R.id.endTime);
 remainingTimeLabel = findViewById(R.id.songtime);
 play_main = findViewById(R.id.play_button_main);
 pause_main = findViewById(R.id.pause_button_main);
 mLayout = findViewById(R.id.activity_main);
 rotate = findViewById(R.id.rotate);

 audioVisualization = findViewById(R.id.visualizer_view);
 seekBar.setOnSeekBarChangeListener(this);
 utils = new Utilities();

 notificationManager = NotificationManagerCompat.from(this);
 getSongList();
 Collections.sort(songList, new Comparator<Song>() 
 public int compare(Song a, Song b) 
 return a.getTitle().compareTo(b.getTitle());
 
 );

 SongAdapter songAdt = new SongAdapter(this, songList);
 songView.setAdapter(songAdt);


 songView.setOnItemClickListener(new AdapterView.OnItemClickListener() 

 @Override
 public void onItemClick(AdapterView<?> parent, View view, int position, final long id) 

 play(position);


 
 );



 repeat.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View v) 
 repeat.setVisibility(View.GONE);
 reaptenable.setVisibility(View.VISIBLE);
 shuffle.setVisibility(View.VISIBLE);
 shufflenable.setVisibility(View.GONE);
 isShuffle = false;
 checked = true;
 Toast.makeText(getApplicationContext(), "Repeat ON", Toast.LENGTH_SHORT).show();
 

 );

 reaptenable.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View v) 
 repeat.setVisibility(View.VISIBLE);
 reaptenable.setVisibility(View.GONE);
 checked = false;
 Toast.makeText(getApplicationContext(), "Repeat OFF", Toast.LENGTH_SHORT).show();

 


 );

 shuffle.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View v) 

 reaptenable.setVisibility(View.GONE);
 repeat.setVisibility(View.VISIBLE);
 checked = false;
 isShuffle = true;

 shuffle.setVisibility(View.GONE);
 shufflenable.setVisibility(View.VISIBLE);
 isShuffle = true;
 Toast.makeText(getApplicationContext(), "Shuffle ON", Toast.LENGTH_SHORT).show();
 

 );
 shufflenable.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View v) 
 shuffle.setVisibility(View.VISIBLE);
 shufflenable.setVisibility(View.GONE);
 isShuffle = false;
 Toast.makeText(getApplicationContext(), "Shuffle OFF", Toast.LENGTH_SHORT).show();
 
 );
 like.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View view) 
 notlike.setVisibility(View.VISIBLE);
 Toast.makeText(MainActivity.this, "You Like the Song", Toast.LENGTH_SHORT).show();
 if (notdislike.getVisibility() == View.VISIBLE) 
 notdislike.setVisibility(View.GONE);
 
 
 );


 notlike.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View view) 
 notlike.setVisibility(View.GONE);
 
 );


 dislike.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View view) 
 notdislike.setVisibility(View.VISIBLE);
 Toast.makeText(MainActivity.this, "You DisLike the Song", Toast.LENGTH_SHORT).show();
 if (notlike.getVisibility() == View.VISIBLE) 
 notlike.setVisibility(View.GONE);
 
 
 );


 notdislike.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View view) 
 notdislike.setVisibility(View.GONE);
 
 );


 play.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View view) 

 if (mediaPlayer == null) 
 play(0);
 else 
 mediaPlayer.start();
 

 play.setVisibility(View.GONE);
 pause.setVisibility(View.VISIBLE);
 Toast.makeText(MainActivity.this, "Song Is now Playing", Toast.LENGTH_SHORT).show();
 if (play_main.getVisibility() == View.VISIBLE) 
 play_main.setVisibility(View.GONE);
 pause_main.setVisibility(View.VISIBLE);
 Animation aniRotate = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.rotate);
 rotate.startAnimation(aniRotate);
 

 
 );

 pause.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View view) 

 if (mediaPlayer != null && mediaPlayer.isPlaying()) 

 mediaPlayer.pause();

 rotate.clearAnimation();
 
 pause.setVisibility(View.GONE);
 play.setVisibility(View.VISIBLE);
 Toast.makeText(MainActivity.this, "Song is Pause", Toast.LENGTH_SHORT).show();
 if (pause_main.getVisibility() == View.VISIBLE) 
 pause_main.setVisibility(View.GONE);
 play_main.setVisibility(View.VISIBLE);
 
 
 );


 play_main.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View view) 
 if (mediaPlayer == null) 
 play(0);
 else 
 mediaPlayer.start();
 

 play_main.setVisibility(View.GONE);
 pause_main.setVisibility(View.VISIBLE);
 Toast.makeText(MainActivity.this, "Song Is now Playing", Toast.LENGTH_SHORT).show();
 if (play.getVisibility() == View.VISIBLE) 
 play.setVisibility(View.GONE);
 pause.setVisibility(View.VISIBLE);
 Animation aniRotate = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.rotate);
 rotate.startAnimation(aniRotate);
 
 
 );


 pervious.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View v) 
 if (currentSongIndex > 0) 
 play(currentSongIndex - 1);
 currentSongIndex = currentSongIndex - 1;
 else 
 // play last song
 play(songList.size() - 1);
 currentSongIndex = songList.size() - 1;
 
 next.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View v) 

 if (currentSongIndex < (songList.size() - 1)) 
 play(currentSongIndex + 1);
 currentSongIndex = currentSongIndex + 1;
 else 
 // play first song
 play(0);
 currentSongIndex = 0;
 
 
 );


 
 );

 pause_main.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View view) 


 if (mediaPlayer != null && mediaPlayer.isPlaying()) 

 mediaPlayer.pause();
 
 pause_main.setVisibility(View.GONE);
 play_main.setVisibility(View.VISIBLE);
 Toast.makeText(MainActivity.this, "Song is Pause", Toast.LENGTH_SHORT).show();
 if (pause.getVisibility() == View.VISIBLE) 
 pause.setVisibility(View.GONE);
 play.setVisibility(View.VISIBLE);
 rotate.clearAnimation();
 
 
 );
 


 @Override
 public void onBackPressed() 

 public void runtimpermession() 
 Dexter.withActivity(this)
 .withPermissions(Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.RECORD_AUDIO,
 Manifest.permission.MODIFY_AUDIO_SETTINGS,Manifest.permission.MEDIA_CONTENT_CONTROL
 ).withListener(new MultiplePermissionsListener() 
 @Override
 public void onPermissionsChecked(MultiplePermissionsReport report) 
 if (report.areAllPermissionsGranted()) 
 Toast.makeText(MainActivity.this, "All Permission is Access Now", Toast.LENGTH_SHORT).show();
 
 

 @Override
 public void onPermissionRationaleShouldBeShown(List<PermissionRequest> permissions, PermissionToken token) 


 
 ).check();


 

 public void getSongList() 
 //retrieve song info
 ContentResolver musicResolver = getContentResolver();
 Uri musicUri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
 Cursor musicCursor = musicResolver.query(musicUri, null, null, null, null);
 if (musicCursor != null && musicCursor.moveToFirst()) 
 //get columns
 int titleColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media.TITLE);
 int idColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media._ID);
 int artistColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media.ARTIST);
 int dataColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media.DATA);


 //add songs to list
 do 
 long thisId = musicCursor.getLong(idColumn);
 String thisTitle = musicCursor.getString(titleColumn);
 String thisArtist = musicCursor.getString(artistColumn);
 String thisPath = musicCursor.getString(dataColumn);

 songList.add(new Song(thisId, thisTitle, thisArtist, thisPath));
 
 while (musicCursor.moveToNext());
 


 


 public void play(int songindex) 
 song = songList.get(songindex);

 try 

 if (mediaPlayer != null) 
 mediaPlayer.release();
 mediaPlayer = null;
 
 Uri uri = Uri.parse("file:///" + song.getGetpath());
 mediaPlayer = MediaPlayer.create(mContext, uri);
 title.setText(song.getTitle());
 artist.setText(song.getArtist());






 handler = VisualizerDbmHandler.Factory.newVisualizerHandler(getApplicationContext(), mediaPlayer);
 audioVisualization.linkTo(handler);
 mediaPlayer.start();
 seekBar.setProgress(0);
 seekBar.setMax(100);
 updateProgressBar();

 if (mediaPlayer != null && mediaPlayer.isPlaying()) 
 play.setVisibility(View.GONE);
 pause.setVisibility(View.VISIBLE);
 play_main.setVisibility(View.GONE);
 pause_main.setVisibility(View.VISIBLE);
 Animation aniRotate = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.rotate);
 rotate.startAnimation(aniRotate);

 mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() 
 @Override
 public void onCompletion(MediaPlayer mp) 


 if (checked) 
 mediaPlayer.setLooping(true);
 mediaPlayer.start();
 else if (isShuffle) 
 // shuffle is on - play a random song
 Random rand = new Random();
 currentSongIndex = rand.nextInt((songList.size() - 1) - 0 + 1) + 0;
 play(currentSongIndex);
 else 
 // no repeat or shuffle ON - play next song
 if (currentSongIndex < (songList.size() - 1)) 
 play(currentSongIndex + 1);
 currentSongIndex = currentSongIndex + 1;
 else 
 // play first song
 play(0);
 currentSongIndex = 0;
 
 
 
 );
 


 catch (Exception e) 

 Toast.makeText(getApplicationContext(), "" + e, Toast.LENGTH_SHORT).show();


 

 


 public void forward() 

 int currentPosition = mediaPlayer.getCurrentPosition();
 // check if seekForward time is lesser than song duration
 if (currentPosition + seekForwardTime <= mediaPlayer.getDuration()) 
 // forward song
 mediaPlayer.seekTo(currentPosition + seekForwardTime);
 else 
 // forward to end position
 mediaPlayer.seekTo(mediaPlayer.getDuration());
 
 

 public void backword() 

 int currentPosition = mediaPlayer.getCurrentPosition();
 // check if seekBackward time is greater than 0 sec
 if (currentPosition - seekBackwardTime >= 0) 
 // forward song
 mediaPlayer.seekTo(currentPosition - seekBackwardTime);
 else 
 // backward to starting position
 mediaPlayer.seekTo(0);
 

 

 @Override
 protected void onPause() 
 super.onPause();
 shownotification();






 

 @Override
 protected void onDestroy() 
 super.onDestroy();
 try 
 mediaPlayer.release();
 
 catch (Exception e)
 Toast.makeText(getApplicationContext(), ""+e, Toast.LENGTH_SHORT).show();
 
 

 public void updateProgressBar() 
 mHandler.postDelayed(mUpdateTimeTask, 100);
 

 private Runnable mUpdateTimeTask = new Runnable() 
 public void run() 
 long totalDuration = mediaPlayer.getDuration();
 long currentDuration = mediaPlayer.getCurrentPosition();

 // Displaying Total Duration time
 remainingTimeLabel.setText(""+utils.milliSecondsToTimer(totalDuration));
 // Displaying time completed playing
 elapsedTimeLabel.setText(""+utils.milliSecondsToTimer(currentDuration));

 // Updating progress bar
 int progress = (int)(utils.getProgressPercentage(currentDuration, totalDuration));
 //Log.d("Progress", ""+progress);
 seekBar.setProgress(progress);

 // Running this thread after 100 milliseconds
 mHandler.postDelayed(this, 100);
 
 ;


 @Override
 public void onProgressChanged (SeekBar seekBar,int progress, boolean fromUser)

 

 @Override
 public void onStartTrackingTouch (SeekBar seekBar)
 mHandler.removeCallbacks(mUpdateTimeTask);
 

 @Override
 public void onStopTrackingTouch (SeekBar seekBar)
 mHandler.removeCallbacks(mUpdateTimeTask);
 int totalDuration = mediaPlayer.getDuration();
 int currentPosition = utils.progressToTimer(seekBar.getProgress(), totalDuration);

 // forward or backward to certain seconds
 mediaPlayer.seekTo(currentPosition);

 // update timer progress again
 updateProgressBar();
 




 /**
 * Background Runnable thread
 * */

public void shownotification()

 Intent intent = new Intent( getApplicationContext(), MediaPlayerService.class );
 intent.setAction( MediaPlayerService.ACTION_PLAY );
 startService( intent );