android studio：無法創建媒體播放器

Question

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9月10日至十七日：34：13.217 17220-20262/com.example.e19adm.onlineradioplayer E/MediaPlayer的：無法創建媒體播放器

公共類MainActivity擴展AppCompatActivity {

Button b_play; 

MediaPlayer mediaPlayer; 
String stream="https://www.internet-radio.com/station/danceradioukchatbox/"; 

boolean prepared = false; 
boolean started = false; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    b_play =(Button) findViewById(R.id.b_play); 
    b_play.setEnabled(false); 
    b_play.setText("LOADING"); 

    mediaPlayer=new MediaPlayer(); 
    mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); 

    new PlayerTask().execute(stream); 

    b_play.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      if (started){ 
       started = false; 
       mediaPlayer.pause(); 
       b_play.setText("PLAY"); 
      } else { 
       started = true; 
       mediaPlayer.start(); 
       b_play.setText("PAUSE"); 
      } 
     } 
    }); 
} 

class PlayerTask extends AsyncTask<String, Void, Boolean>{ 
    @Override 
    protected Boolean doInBackground(String... strings) { 
     try { 
      mediaPlayer.setDataSource(strings[0]); 
      mediaPlayer.prepare(); 
      prepared = true; 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 

     return prepared; 
    } 

    @Override 
    protected void onPostExecute(Boolean aBoolean) { 
     super.onPostExecute(aBoolean); 
     b_play.setEnabled(true); 
     b_play.setText("PLAY"); 
    } 
} 

@Override 
protected void onPause() { 
    super.onPause(); 
    if (started){ 
     mediaPlayer.pause(); 
    } 
} 

@Override 
protected void onResume() { 
    super.onResume(); 
    if (started){ 
     mediaPlayer.start(); 
    } 
} 

@Override 
protected void onDestroy() { 
    super.onDestroy(); 
    if (prepared){ 
     mediaPlayer.release(); 
    } 
} } 





> 0-17 10:17:35.383 32413-32413/com.example.e19adm.onlineradioplayer 
    > E/MediaPlayer: pause called in state 0 
    >  10-17 10:17:135.413 32413-19389/com.example.e19adm.onlineradioplayer I/MediaPlayer: This 
    > is not a sprint project 
    >  10-17 10:17:35.423 32413-19389/com.example.e19adm.onlineradioplayer E/MediaPlayer: Unable 
    > to create media player 
    >  10-17 10:17:35.423 32413-19389/com.example.e19adm.onlineradioplayer W/System.err: 
    > java.io.IOException: setDataSource failed.: status=0x80000000 
    >  10-17 10:17:35.423 32413-19389/com.example.e19adm.onlineradioplayer W/System.err:  at 
    > android.media.MediaPlayer._setDataSource(Native Method) 
    >  10-17 10:17:35.423 32413-19389/com.example.e19adm.onlineradioplayer W/System.err:  at 
    > android.media.MediaPlayer.setDataSource(MediaPlayer.java:1248) 
    >  10-17 10:17:35.433 32413-19389/com.example.e19adm.onlineradioplayer W/System.err:  at 
    > android.media.MediaPlayer.setDataSource(MediaPlayer.java:1180) 
    >  10-17 10:17:35.433 32413-19389/com.example.e19adm.onlineradioplayer W/System.err:  at 
    > com.example.e19adm.onlineradioplayer.MainActivity$PlayerTask$override.doInBackground(MainActivity.java:64) 
    >  10-17 10:17:35.433 32413-19389/com.example.e19adm.onlineradioplayer W/System.err:  at 
    > com.example.e19adm.onlineradioplayer.MainActivity$PlayerTask$override.access$dispatch(MainActivity.java) 
    >  10-17 10:17:35.433 32413-19389/com.example.e19adm.onlineradioplayer W/System.err:  at 
    > com.example.e19adm.onlineradioplayer.MainActivity$PlayerTask.doInBackground(MainActivity.java:0) 
    >  10-17 10:17:35.433 32413-19389/com.example.e19adm.onlineradioplayer W/System.err:  at 
    > com.example.e19adm.onlineradioplayer.MainActivity$PlayerTask.doInBackground(MainActivity.java:57) 
    >  10-17 10:17:35.433 32413-19389/com.example.e19adm.onlineradioplayer W/System.err:  at 
    > android.os.AsyncTask$2.call(AsyncTask.java:288) 
    >  10-17 10:17:35.433 32413-19389/com.example.e19adm.onlineradioplayer W/System.err:  at 
    > java.util.concurrent.FutureTask.run(FutureTask.java:237) 
    >  10-17 10:17:35.433 32413-19389/com.example.e19adm.onlineradioplayer W/System.err:  at 
    > android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) 
    >  10-17 10:17:35.433 32413-19389/com.example.e19adm.onlineradioplayer W/System.err:  at 
    > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
    >  10-17 10:17:35.433 32413-19389/com.example.e19adm.onlineradioplayer W/System.err:  at 
    > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
    >  10-17 10:17:35.433 32413-19389/com.example.e19adm.onlineradioplayer W/System.err:  at 
    > java.lang.Thread.run(Thread.java:864) 
    >  10-17 10:17:38.643 32413-32413/com.example.e19adm.onlineradioplayer D/[MediaPluginDLNA]: 
    > [getIsRegionSupported] sRegionCode: 6 
    >  10-17 10:17:38.643 32413-32413/com.example.e19adm.onlineradioplayer D/[MediaPluginDLNA]: 
    > not in Mirror mode 
    >  10-17 10:17:38.643 32413-32413/com.example.e19adm.onlineradioplayer D/MediaPlayer: 
    > doStart() in 
    >  10-17 10:17:38.643 32413-32413/com.example.e19adm.onlineradioplayer D/MediaPlayer: 
    > Htc_getIntParameter get error: -38 
    >  10-17 10:17:38.643 32413-32413/com.example.e19adm.onlineradioplayer E/MediaPlayer: start 
    > called in state 1 
    >  10-17 10:17:38.643 32413-32413/com.example.e19adm.onlineradioplayer E/MediaPlayer: error 
    > (-38, 0) 
    >  10-17 10:17:38.643 32413-32413/com.example.e19adm.onlineradioplayer D/MediaPlayer: 
    > Mediaplayer receives message, message type: 100 
    >  10-17 10:17:38.643 32413-32413/com.example.e19adm.onlineradioplayer E/MediaPlayer: Error 
    > (-38,0) 
    >  10-17 10:17:40.133 32413-32413/com.example.e19adm.onlineradioplayer E/MediaPlayer: pause 
    > called in state 0 

Answer 1

考慮加入允許訪問INTERNET您AndroidManifest.xml

<uses-permission android:name="android.permission.INTERNET"/>