如何在android中构建通知并实现点击监听器？

Question

Hello friends i am creating mp3 player application my application is successfully build i want implement click event notification when user goes on background they control media from notification panel my notification also build successfully but problem is that how control music and change image on notification .addaction() when user click on pause the image change to play and when song is play image back change to pause and media player is also and i am also want get songs title, and artist here my code you can easily understand!

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());

     notificationTitleText=title.getText();
    notificationDescText=artist.getText();
    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  shownotification(){
    Bitmap largeImage = BitmapFactory.decodeResource(getResources(),R.drawable.dog);




    Notification channel = new NotificationCompat.Builder(getApplicationContext(),CHANNEL_ID_1)
            .setSmallIcon(R.drawable.ic_music)
            .setContentTitle(notificationTitleText
            )
            .setContentText(notificationDescText)
            .setLargeIcon(largeImage)
            .addAction(R.drawable.ic_like,"like",null)
            .addAction(R.drawable.ic_prev,"prev",null)
            .addAction(R.drawable.ic_pause,"pause",null)
            .addAction(R.drawable.ic_next,"next",null)
            .addAction(R.drawable.ic_dislike,"dislike",null)
            .setStyle(new android.support.v4.media.app.NotificationCompat.MediaStyle().
                    setShowActionsInCompactView(1,2,3))
            .build();



    mNotificationManagerCompat.notify(1,channel);

}

gettext()method is working fine but it work on first when any clicked event is happen if song play oncomplete and next song is not get text value

Answer 1

I am assuming that you are playing songs from an Activity but this will also work for a service.

Put this in your activity or service

private final BroadcastReceiver receiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if(action.equals("com.mypackage.ACTION_PAUSE_MUSIC")){
            //Do whatever you want. Ex. Pause
        }
        //Similarly this can be done for all actions
    }};

Make your show notification method like this

public  void  shownotification(){
Bitmap largeImage = BitmapFactory.decodeResource(getResources(),R.drawable.dog);

Intent pauseIntent = new Intent("com.mypackage.ACTION_PAUSE_MUSIC");
PendingIntent pausePendingIntent = PendingIntent.getBroadcast(this, 1, pauseIntent, 0);
// Similarly you can create an intent and pending intent pair for each action you want just change the string in intent constructor

Notification channel = new NotificationCompat.Builder(getApplicationContext(),CHANNEL_ID_1)
        .setSmallIcon(R.drawable.ic_music)
        .setContentTitle(notificationTitleText
        )
        .setContentText(notificationDescText)
        .setLargeIcon(largeImage)
        .addAction(R.drawable.ic_like,"like",null)
        .addAction(R.drawable.ic_prev,"prev",null)
        .addAction(R.drawable.ic_pause,"pause",pausePendingIntent)  //like this attach every action with respective pending intent
        .addAction(R.drawable.ic_next,"next",null)
        .addAction(R.drawable.ic_dislike,"dislike",null)
        .setStyle(new android.support.v4.media.app.NotificationCompat.MediaStyle()
        .setShowActionsInCompactView(1,2,3))
        .build();

mNotificationManagerCompat.notify(1,channel);}

Answer 2

I want to add one more thing to @Kumar Manas answer

ie We need to register reciever that is being created in activity.

private final BroadcastReceiver receiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if(action.equals("com.mypackage.ACTION_PAUSE_MUSIC")){
            //Do whatever you want. Ex. Pause
        }
        //Similarly this can be done for all actions
    }};

To register your Reciever add these lines in onCreate()

            IntentFilter intentFilter=new IntentFilter();
            intentFilter.addAction("com.mypackage.ACTION_PAUSE_MUSIC");
            registerReceiver(receiver,intentFilter);

Note: You can add as many actions you want

Answer 3

您可以按照本教程“锁定屏幕和通知上的 Android 音乐播放器控件”获得答案