Question

我正在开发流媒体应用。虽然我已经使用java很长一段时间了，但我是Android的新手并没有直截了当地发现它。首先，使用Android Media播放器工作正常，直到几周后，它停止工作。我联系了流媒体代理，他们解释说他们没有改变任何东西，并进一步补充说这是一个编码问题让我感到困惑。那为什么以前呢？

建议使用AAC编码器。我不知道如何在Mediaplayer中使用编码器...... 流媒体链接是playlist.m3u8格式。谁可以帮助我？我真的很想知道为什么应用程序首先停止流式传输。

package com.example.yoyojojo.first_streaming;

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity {
private MediaPlayer mPlayer = new MediaPlayer();
private Button buttonPlay;
private Button buttonStop;
private String url = "http://aztecalive-lh.akamaihd.net/i/0qeij0bji_1@26639/index_2_av-b.m3u8";        //I am having problems with this type of links .m3u8
private String url2 = "http://bbcmedia.ic.llnwd.net/stream/bbcmedia_radio2_mf_p";
private String url3 = "http://usa8-vn.mixstream.net:8138";


private RadioGroup radioStation;
private RadioButton selectedStation;
private RadioButton editStation;
private TextView text;
private EditText newUrlEntry;

private CharSequence bbc = "BBC", usa = "Shoutcast USA", guru = "GuruMP3";

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

    mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

    radioStation = (RadioGroup) findViewById(R.id.radioStation);
    text = (TextView) findViewById(R.id.textV);
    buttonPlay = (Button) findViewById(R.id.play);
    newUrlEntry = (EditText) findViewById(R.id.editText);


    editStation = (RadioButton) findViewById(R.id.editStation);


    buttonPlay.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            int selectedId = radioStation.getCheckedRadioButtonId();
            selectedStation = (RadioButton) findViewById(selectedId);
            String choice = selectedStation.getText().toString();

            text.setText("Station: "+choice);
            String streamUrl = "";

            switch(choice) {
                case "BBC":
                    streamUrl = url2;
                        break;
                case "Shoutcast USA":
                    streamUrl = url3;
                        break;
                case "GuruMP3":
                    streamUrl = url;
                    break;
                case "Enter URL":
                    streamUrl = newUrlEntry.getText().toString();
                    text.setText("Station: "+streamUrl.substring(0, 10));
                    break;

                default:
                    break;
            }

            mPlayer = new MediaPlayer();
            mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
            try {
                mPlayer.setDataSource(streamUrl);
                mPlayer.prepare();
            } catch (Exception e) {
                Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
            }

            mPlayer.start();
        }
    });

    buttonStop = (Button) findViewById(R.id.stop);
    buttonStop.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            if(mPlayer!=null && mPlayer.isPlaying()){
                mPlayer.stop();
            }
        }
    });
}

}

以下是生成的错误：

06-21 18:00:17.116 18668-18668/com.example.yoyojojo.appstream2 D/Starting: Starting Streaming
06-21 18:00:20.218 18668-18681/com.example.yoyojojo.appstream2 W/IMediaDeathNotifier: media server died
06-21 18:00:20.218 18668-18681/com.example.yoyojojo.appstream2 E/MediaPlayer: error (100, 0)
06-21 18:00:20.218 18668-18681/com.example.yoyojojo.appstream2 E/MediaPlayer: error (100, 0)
06-21 18:00:20.218 18668-18681/com.example.yoyojojo.appstream2 E/MediaPlayer: error (100, 0)
06-21 18:00:20.218 18668-18668/com.example.yoyojojo.appstream2 D/Starting: Prepare failed.: status=0x64
06-21 18:00:20.221 18668-18668/com.example.yoyojojo.appstream2 E/MediaPlayer: start called in state 0, mPlayer(0x9fd96d40)
06-21 18:00:20.221 18668-18668/com.example.yoyojojo.appstream2 E/MediaPlayer: error (-38, 0)
06-21 18:00:20.222 18668-18668/com.example.yoyojojo.appstream2 I/Choreographer: Skipped 185 frames!  The application may be doing too much work on its main thread.
06-21 18:00:20.223 18668-18668/com.example.yoyojojo.appstream2 E/MediaPlayer: Error (100,0)
06-21 18:00:20.223 18668-18668/com.example.yoyojojo.appstream2 E/MediaPlayer: Error (100,0)
06-21 18:00:20.231 18668-18668/com.example.yoyojojo.appstream2 E/MediaPlayer: Error (-38,0)

使用Android MediaPlayer的音频流应用程序在经过数周完美无瑕的工作后开始无法流式传输

0 个答案: