如何在我的媒体播放器中调整setOnErrorListener并在文本视图中将状态设置为“离线”

Question

当我的url不工作时，我需要调整一个错误侦听器，该侦听器在textview中设置脱机状态。我不知道如何准确地调整这个。或者return false是什么意思？任何帮助都将不胜感激。这是我的媒体播放器：

lv_tracks.setOnItemClickListener（新的AdapterView. OnItemClickListener（）{

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


        if (isNetworkAvailable()) {
            mSelectedTrackTitle.setText(stations[position]);
            // mSelectedTrackImage.setImageResource(images[position]);
            nowplaying.setText("Now Playing");
            mPlayerControl.setImageResource(R.drawable.ic_pause_circle_filled);
            Resources res = getResources();
            String[] links = res.getStringArray(R.array.links);
            String url = links[position];
            // Toast.makeText(MainActivity.this,url,Toast.LENGTH_SHORT).show();

            if (mMediaPlayer.isPlaying()) {
                Log.d("abc", "playing and now going to reset : " + url);
                try {
                    mMediaPlayer.pause();
                    mMediaPlayer.stop();
                    mMediaPlayer.release();
                    mMediaPlayer = new MediaPlayer();
                    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
                    mMediaPlayer.setDataSource(url);
                    mMediaPlayer.prepare();
                    mMediaPlayer.start();
                } catch (IOException e) {
                    nowplaying.setText("Offline");
                    Toast.makeText(MainActivity.this,"SERVER IS DOWN",Toast.LENGTH_SHORT).show();
                    //mMediaPlayer.release();
                    e.printStackTrace();
                }

            } else {
                try {
                    Log.d("abc", "in else part :" + url);
                    mMediaPlayer = new MediaPlayer();
                    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
                    mMediaPlayer.setDataSource(url);
                    mMediaPlayer.prepare();
                    mMediaPlayer.start();

                } catch (IOException e) {
                    nowplaying.setText("Offline");
                    Toast.makeText(MainActivity.this,"SERVER IS DOWN",Toast.LENGTH_SHORT).show();
                    //mMediaPlayer.release();
                    e.printStackTrace();
                }
                return;
            }
        } else {
            Toast.makeText(MainActivity.this, "No Internet Connection", Toast.LENGTH_SHORT).show();
        }

    }
});

Logcat（当我第一次选择时）：

10-12 17:07:54.426 20080-20091/indusradio。pk W/MediaPlayer JNI:MediaPlayer定稿，未发布10-12 17:07:54.426 20080-20091/indusradio。pk I/MediaPlayerActive:Pid:20080 MediaPlayer析构函数10-12 17:08:29.478 20080-20096/indusradio。pk D/MediaPlayerActive：消息：MEDIA\u ERROR（100），ext1=MEDIA\u ERROR\u UNKNOWN（1），ext2=0x8000000 10-12 17:08:29.480 20080-20096/indusradio。pk E/MediaPlayerActive：错误（1，-2147483648）10-12 17:08:29.480 20080-20096/indusradio。pk D/MediaPlayerActive：[通知]：[1204]回调应用程序listenerNotNull=1，发送=0 10-12 17:08:29.487 20080-20080/行业Radio。pk D/hwrtbluutils：检查hwtoost Toast的模糊样式，themeResId:0x7f0900b4，context:com。实例马哈姆。印度船级社。MainActivity@77db462，Nhwext:6，get Blur:disable with，android。图样可抽出式。NinePatchDrawable@c363c710-12 17:08:29.505 20080-20080/indusradio。带系统的pk。错误：java。io。IOException：准备失败：状态=0x1 10-12 17:08:29.506 20080-20080/工业无线电。带系统的pk。错误：在android上。媒体MediaPlayer_制备（本地方法）10-12 17:08:29.507 20080-20080/工业雷达。带系统的pk。错误：在android上。媒体MediaPlayer。准备（MediaPlayer.java:1313）10-12 17:08:29.507 20080-20080/indusradio。带系统的pk。错误：位于com。实例马哈姆。印度船级社。主要活动3美元。onItemClick（MainActivity.java:174）

它有时会崩溃，大约需要20秒才能显示脱机状态。

Answer 1

您可以在catch中设置文本，如

    mMediaPlayer = new MediaPlayer();

    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
                                        mMediaPlayer.setDataSource(url);

    mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                @Override
                public void onPrepared(MediaPlayer mp) {
                     mMediaPlayer.start();
                }
            });

    mMediaPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() {
                                            @Override
                                            public boolean 
    onError(MediaPlayer mp, int what, int extra) {

                                                return false;
                                            }
                                        });

        mMediaPlayer.prepareAsync();
                                    } catch (IOException e) {
                                      nowplaying.setText("OFFLINE")
                                        e.printStackTrace();
                                    }