从v4升级项目后找不到类'android.support.v7.app.NotificationCompat $ Builder'

Question

从项目升级后无法找到类'android.support.v7.app.NotificationCompat $ Builder' v4

我正在尝试使用通知来管理我的mediaplyaer控件。

我需要为我的项目使用android.support.v7.app.NotificationCompat，以便根据此问题进一步研究锁屏控制。

https://stackoverflow.com/a/31013955/3126760

我已经更新我的支持库23.0.1

当我尝试建立下面的代码

public class player6 extends Service implements OnCompletionListener, 
     OnPreparedListener, OnErrorListener, OnSeekCompleteListener, 
     OnInfoListener, OnBufferingUpdateListener { 
    final int NOTIFICATION_ID = 1; 
    public static final String EXTRA_AUDIO_URL = "audio_url"; 
    public static final String BROADCAST_PLAYBACK_STOP = "stop", 
      BROADCAST_PLAYBACK_PAUSE = "pause", 
      BROADCAST_PLAYBACK_NEXT = "next", 
      BROADCAST_PLAYBACK_PREVIOUS = "previous", 
      BROADCAST_PLAYBACK_SHUFFLE = "shuffle", 
      BROADCAST_PLAYBACK_REPEAT = "repeat"; 
    int song_aLBUM; 
    private boolean isShuffle = false; 
    private boolean isRepeat = false; 
    ArrayList<String> songs; 
    Cursor cursor; 
    Uri uri; 
    Bundle b; 
    private int index; 
    Button play, next, back, eqaulize; 
    ArrayList<String> MultilistArray; 
    MediaPlayer mediaPlayer; 
    String url; 
    String x; 
    // seekbar variables for processing 
    String sntSeekPos; 
    int intSeekPos; 
    int mediaPosition; 
    int mediaMax; 
    private final Handler handler = new Handler(); 
    private static int songEnded; 
    public static final String BROADCAST_ACTION = "com.example.classanimate.seekprogress"; 
    Intent bufferIntent; 
    Intent seekIntent; 
     //lolipop 
     private MediaSessionManager mManager; 
     private MediaSession mSession; 
     private MediaController mController; 



    final BroadcastReceiver broadcastReceiver = new BroadcastReceiver() { 
     @Override 
     public void onReceive(Context context, Intent intent) { 
      String action = intent.getAction(); 

      if (action.equals(BROADCAST_PLAYBACK_STOP)) 
       stopSelf(); 
      else if (action.equals(BROADCAST_PLAYBACK_PAUSE)) { 
       if (mediaPlayer.isPlaying()) 
        mediaPlayer.pause(); 
       else 
        mediaPlayer.start(); 
      } else if (action.equals(BROADCAST_PLAYBACK_NEXT)) { 
       playnext(); 
      } else if (action.equals(BROADCAST_PLAYBACK_PREVIOUS)) { 
       playprevious(); 
      } else if (action.equals(BROADCAST_PLAYBACK_SHUFFLE)) { 
       playShuffle(); 
      } else if (action.equals(BROADCAST_PLAYBACK_REPEAT)) { 
       playRepeat(); 
      } else if (action.equals(playeractivity.BROADCAST_SEEKBAR)) { 
       updateSeekPos(intent); 
      } 
     } 

    }; 

    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 


     b = intent.getExtras(); 
     index = b.getInt("position"); 


     MultilistArray = intent.getStringArrayListExtra("multilist"); 

     getMusic(); 
     playSong(index); 

     showNotification(); 
     setupHandler(); 
     return START_STICKY; 
    } 

    @Override 
    public void onCreate() { 

     seekIntent = new Intent(BROADCAST_ACTION); 

     mediaPlayer = new MediaPlayer(); 

     mediaPlayer.setOnSeekCompleteListener(this); 
     mediaPlayer.setOnCompletionListener(this); 
     mediaPlayer.setOnPreparedListener(this); 
     mediaPlayer.setOnErrorListener(this); 
     mediaPlayer.setOnSeekCompleteListener(this); 
     mediaPlayer.setOnInfoListener(this); 
     mediaPlayer.setOnBufferingUpdateListener(this); 


     IntentFilter intentFilter = new IntentFilter(); 
     intentFilter.addAction(BROADCAST_PLAYBACK_STOP); 
     intentFilter.addAction(BROADCAST_PLAYBACK_PAUSE); 
     intentFilter.addAction(BROADCAST_PLAYBACK_NEXT); 
     intentFilter.addAction(BROADCAST_PLAYBACK_PREVIOUS); 
     intentFilter.addAction(BROADCAST_PLAYBACK_SHUFFLE); 
     intentFilter.addAction(BROADCAST_PLAYBACK_REPEAT); 
     intentFilter.addAction(playeractivity.BROADCAST_SEEKBAR); 

     // LocalBroadcastManager.getInstance(this). 

     registerReceiver(broadcastReceiver, intentFilter); 
    } 

    public void getMusic() { 
     // TODO Auto-generated method stub 

     for (Iterator iterator = MultilistArray.iterator(); iterator.hasNext();) { 
      x = (String) iterator.next(); 
      // do some stuff 

     } 

     uri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; 
     String projection[] = { android.provider.MediaStore.Audio.Media.DATA, 
       android.provider.MediaStore.Audio.Media.TITLE, 
       android.provider.MediaStore.Audio.Media.ARTIST, 
       android.provider.MediaStore.Audio.Media.ALBUM, 
       android.provider.MediaStore.Audio.Media.COMPOSER, 
       android.provider.MediaStore.Audio.Media.DURATION, 
       MediaStore.Audio.Media._ID, 
       // android.provider.MediaStore.Audio.Albums.ALBUM_ART, 
       android.provider.MediaStore.Audio.Media.ALBUM_ID }; 

     String selection1 = MediaStore.Audio.Media._ID + " IN("; 
     // String[] selectionArgs = "{"; 
     for (int i = 0; i < MultilistArray.size(); i++) { 
      selection1 += "?, "; 

     } 


     selection1 = selection1.substring(0, selection1.length() - 2) + ")"; 

     String[] selectionArgs = new String[MultilistArray.size()]; 
     selectionArgs = MultilistArray.toArray(selectionArgs); 



     cursor = this.getContentResolver().query(uri, projection, selection1, 
       selectionArgs, null); 
     songs = new ArrayList<String>(); 

     cursor.moveToFirst(); 
     while (!cursor.isAfterLast()) { 
      songs.add(cursor.getString(2)); 
      cursor.moveToNext(); 
     } 

    } 

    public void playSong(int index2) { 
     // public void playSong() { 

     if (b.getInt("position") != 0) { 
      cursor.moveToPosition(0); 
     } 
     else{ 
     cursor.moveToPosition(index); 
     } 
     int song_id = cursor 
       .getColumnIndex(android.provider.MediaStore.Audio.Media.DATA); 

     String song_name = cursor.getString(cursor 
       .getColumnIndex(android.provider.MediaStore.Audio.Media.DATA)); 

     song_aLBUM = cursor 
       .getColumnIndex(android.provider.MediaStore.Audio.Media.ALBUM); 
     String song_album_name = cursor.getString(song_aLBUM); 


     SongDetailsId(); 
     try { 
      mediaPlayer.reset(); 
      mediaPlayer.setDataSource(song_name); 

      mediaPlayer.prepare(); 
      // sb.setMax(mediaplayer.getDuration()); 
      mediaPlayer.start(); 

      // int totalDuration = mediaplayer.getDuration(); 
     } catch (IllegalArgumentException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (SecurityException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IllegalStateException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

    } 

    @Override 
    public void onCompletion(MediaPlayer mp) { 
     // stopSelf(); 
     if (isRepeat) { 
      // repeat is on play same song again 
      playSong(index); 
     } else if (isShuffle) { 
      // shuffle is on - play a random song 
      Random rand = new Random(); 
      index = rand.nextInt((songs.size() - 1) - 0 + 1) + 0; 
      playSong(index); 
     } else { 
      // no repeat or shuffle ON - play next song 
      if (index < (songs.size() - 1)) { 
       playSong(index + 1); 
       index = index + 1; 
      } else { 
       // play first song 
       playSong(0); 
       index = 0; 
      } 
     } 
    } 

    @Override 
    public void onPrepared(MediaPlayer mp) { 
     Log.d("Service", "MediaPlayer prepared. Music will play now."); 
     mediaPlayer.start(); 
    } 

    @Override 
    public IBinder onBind(Intent arg0) { 
     // TODO Auto-generated method stub 
     return null; 
    } 

    private PendingIntent makePendingIntent(String broadcast) { 
     Intent intent = new Intent(broadcast); 
     return PendingIntent 
       .getBroadcast(getApplicationContext(), 0, intent, 0); 
    } 

    private void showNotification() { 
     // Create notification 
     Builder notificationBuilder = (Builder) new NotificationCompat.Builder(
       this) 
       .setSmallIcon(R.drawable.ic_launcher) 
       .setContentTitle(getString(R.string.app_name)) 
       .setContentText(this.url) 
       // audio url will show in notification 
       .setContentIntent(
         PendingIntent.getActivity(getApplicationContext(), 0, 
           new Intent(getApplicationContext(), 
             player6.class), 0)) 
       .addAction(R.drawable.ic_action_play, "Stop", 
         makePendingIntent(BROADCAST_PLAYBACK_STOP)) 
       .addAction(R.drawable.ic_action_pause, "Pause", 
         makePendingIntent(BROADCAST_PLAYBACK_PAUSE)) 
       .addAction(R.drawable.img_btn_forward, "next", 
         makePendingIntent(BROADCAST_PLAYBACK_NEXT)); 

     // Show notification 
     startForeground(NOTIFICATION_ID, notificationBuilder.build()); 
    } 

    private void playnext() { 
     // TODO Auto-generated method stub 
     if (isShuffle) { 
      // shuffle is on - play a random song 
      Random rand = new Random(); 
      index = rand.nextInt((songs.size() - 1) - 0 + 1) + 0; 
      playSong(index); 
     } else { 
      if (index < (songs.size() - 1)) { 
       index += 1; 
       // sb.setMax(mediaplayer.getDuration()); 
       playSong(index); 
      } else { 
       index = 0; 
       playSong(index); 
      } 
     } 
    } 

    private void playprevious() { 
     // TODO Auto-generated method stub 
     if (isShuffle) { 
      // shuffle is on - play a random song 
      Random rand = new Random(); 
      index = rand.nextInt((songs.size() - 1) - 0 + 1) + 0; 
      playSong(index); 
     } else { 
      if (index > 0) { 
       index -= 1; 

       playSong(index); 
      } else { 
       index = songs.size() - 1; 
       playSong(index); 
      } 
     } 

    } 

    private void playShuffle() { 
     // TODO Auto-generated method stub 
     Toast.makeText(this, "playShuffle", Toast.LENGTH_SHORT).show(); 
     if (isShuffle) { 
      isShuffle = false; 

      playeractivity.shuffle.setText("Shuffle is OFF"); 
     } else { 
      // make repeat to true 
      isShuffle = true; 

      // make shuffle to false 
      isRepeat = false; 
      playeractivity.shuffle.setText("Shuffle is ON"); 
      playeractivity.repeat.setText("Repeat is OFF"); 

     } 

    } 

    private void playRepeat() { 
     // TODO Auto-generated method stub 
     Toast.makeText(this, "btrepeat", Toast.LENGTH_SHORT).show(); 
     if (isRepeat) { 
      isRepeat = false; 

      playeractivity.repeat.setText("Repeat is OFF"); 
     } else { 
      // make repeat to true 
      isRepeat = true; 

      isShuffle = false; 
      playeractivity.repeat.setText("Repeat is ON"); 
      playeractivity.shuffle.setText("Shuffle is OFF"); 
      // btnShuffle.setImageResource(R.drawable.btn_shuffle); 
     } 
    } 

    @Override 
    public void onBufferingUpdate(MediaPlayer mp, int percent) { 
     // TODO Auto-generated method stub 

    } 

    @Override 
    public boolean onInfo(MediaPlayer mp, int what, int extra) { 
     // TODO Auto-generated method stub 
     return false; 
    } 

    @Override 
    public void onSeekComplete(MediaPlayer mp) { 
     // TODO Auto-generated method stub 
     if (!mediaPlayer.isPlaying()) { 
      playSong(index); 
     } 

    } 

    @Override 
    public boolean onError(MediaPlayer mp, int what, int extra) { 
     // TODO Auto-generated method stub 
     return false; 
    } 

    private void setupHandler() { 
     handler.removeCallbacks(sendUpdatesToUI); 
     handler.postDelayed(sendUpdatesToUI, 500); 
    } 

    private Runnable sendUpdatesToUI = new Runnable() { 
     @Override 
     public void run() { 

      LogMediaPosition(); 

      handler.postDelayed(this, 500); 
     } 
    }; 

    private void LogMediaPosition() { 
     // TODO Auto-generated method stub 
     if (mediaPlayer.isPlaying()) { 
      mediaPosition = mediaPlayer.getCurrentPosition(); 

      mediaMax = mediaPlayer.getDuration(); 

      seekIntent.putExtra("counter", String.valueOf(mediaPosition)); 

      seekIntent.putExtra("mediamax", String.valueOf(mediaMax)); 

      seekIntent.putExtra("song_ended", String.valueOf(songEnded)); 
      sendBroadcast(seekIntent); 


     } 
    } 

    public void updateSeekPos(Intent intent) { 
     int seekPos = intent.getIntExtra("seekpos", 0); 
     if (mediaPlayer.isPlaying()) { 
      handler.removeCallbacks(sendUpdatesToUI); 
      // Toast.makeText(this, "positon" + seekPos, 
      // Toast.LENGTH_SHORT).show(); 
      mediaPlayer.seekTo(seekPos); 
      setupHandler(); 

     } 

    } 

    @Override 
    public void onDestroy() // called when the service is stopped 
    { 
     mediaPlayer.stop(); 
     stopForeground(true); 
     handler.removeCallbacks(sendUpdatesToUI); 
     unregisterReceiver(broadcastReceiver); 
     super.onDestroy(); 
    } 

    public void SongDetailsId() { 
     Intent intent = new Intent(playeractivity.SONG_DETAILS); 
     intent.putExtra("value", index); 
     sendBroadcast(intent); 
    } 
} 

我获得以下错误日志猫

10-16 10:07:02.742: E/dalvikvm(1134): Could not find class 'android.support.v7.app.NotificationCompat$Builder', referenced from method com.example.multiplayer.player6.showNotification

这些都是我进口

import java.io.IOException; 
import java.util.ArrayList; 
import java.util.Iterator; 
import java.util.Random; 

import android.app.PendingIntent; 
import android.app.Service; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.database.Cursor; 
import android.media.AudioManager; 
import android.media.MediaPlayer; 
import android.media.MediaPlayer.OnBufferingUpdateListener; 
import android.media.MediaPlayer.OnCompletionListener; 
import android.media.MediaPlayer.OnErrorListener; 
import android.media.MediaPlayer.OnInfoListener; 
import android.media.MediaPlayer.OnPreparedListener; 
import android.media.MediaPlayer.OnSeekCompleteListener; 
import android.media.session.MediaController; 
import android.media.session.MediaSession; 
import android.media.session.MediaSessionManager; 
import android.net.Uri; 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.IBinder; 
import android.provider.MediaStore; 

import android.support.v7.app.NotificationCompat; 
import android.support.v7.app.NotificationCompat.Builder; 

import android.util.Log; 
import android.widget.Button; 
import android.widget.Toast; 

现在我知道，如果我会用import android.support.v4.app.NotificationCompat;它woiuld解决我目前的问题，但我需要使用import android.support.v7.app.NotificationCompat对我今后的工作。发生

的问题

private void showNotification() { 
     // Create notification 
     Builder notificationBuilder = (Builder) new NotificationCompat.Builder(
       this) 
       .setSmallIcon(R.drawable.ic_launcher) 
       .setContentTitle(getString(R.string.app_name)) 
       .setContentText(this.url) 
       // audio url will show in notification 
       .setContentIntent(
         PendingIntent.getActivity(getApplicationContext(), 0, 
           new Intent(getApplicationContext(), 
             player6.class), 0)) 
       .addAction(R.drawable.ic_action_play, "Stop", 
         makePendingIntent(BROADCAST_PLAYBACK_STOP)) 
       .addAction(R.drawable.ic_action_pause, "Pause", 
         makePendingIntent(BROADCAST_PLAYBACK_PAUSE)) 
       .addAction(R.drawable.img_btn_forward, "next", 
         makePendingIntent(BROADCAST_PLAYBACK_NEXT)); 

     // Show notification 
     startForeground(NOTIFICATION_ID, notificationBuilder.build()); 
    } 

我已经尝试了很多事情，包括使用android.support.v4.app.NotificationCompat.Builder notificationBuilder =

，并尝试添加投（BULIDER），但每次我会得到同样的错误。

如何使用android.support.v7.app.NotificationCompat与Builder

Answer 1

万物看起来好了，给它一个尝试

• 进口android.support.v7.app.NotificationCompat;
• 你不需要NotificationBuilder使用

Notification notificationBuilder = new NotificationCompat.Builder(
       this) 
       .setSmallIcon(R.drawable.music) 
       .setContentTitle(getString(R.string.app_name)) 
       .setContentText(this.url) 
       // audio url will show in notification 
       .setContentIntent(
         PendingIntent.getActivity(getApplicationContext(), 0, 
           new Intent(getApplicationContext(), 
             player6.class), 0)) 
       .addAction(R.drawable.ic_stat_pause_100, "Stop", 
         makePendingIntent(BROADCAST_PLAYBACK_STOP)) 
       .addAction(R.drawable.ic_stat_pause_100, "Pause", 
         makePendingIntent(BROADCAST_PLAYBACK_PAUSE)) 
       .addAction(R.drawable.ic_stat_circled_right_2_100, "next", 
         makePendingIntent(BROADCAST_PLAYBACK_NEXT)).build(); 

     // Show notification 
     startForeground(NOTIFICATION_ID, notificationBuilder); 

Answer 2

帮我

NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this); 
notificationBuilder.setSmallIcon(R.drawable.ic_stat_ic_notification); 

等。不知道为什么这必须如此格式化，但它适用于我。