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你好，我正在爲一個電臺建立一個應用程序。現在我可以在應用程序中播放音樂，但是當我進入主屏幕時音頻停止。有人有關於如何使用我的代碼繼續在後臺播放音頻的提示建議嗎？在後臺播放radioostream
我的代碼：
package com.wemait.rtvhardenberg;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import com.wemait.rtvhardenberg.Nieuws.GetJSONData;
import com.wemait.rtvhardenberg.helper.AlertDialogManager;
import com.wemait.rtvhardenberg.helper.BackgroundSoundService;
import com.wemait.rtvhardenberg.helper.ConnectionDetector;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.drawable.AnimationDrawable;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnBufferingUpdateListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ProgressBar;
public class Muziek extends Activity implements OnClickListener {
private final static String RADIO_STATION_URL = "http://stream.intronic.nl/rtvhardenberg";
private ProgressBar playSeekBar;
private Button buttonPlay;
private Button buttonStopPlay;
private MediaPlayer player;
/**
* Reference to the ImageView which will display the animation.
*/
ImageView animation;
// Connection detector
ConnectionDetector cd;
// Alert dialog manager
AlertDialogManager alert = new AlertDialogManager();
// Progress Dialog
private ProgressDialog pDialog;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.muziek);
cd = new ConnectionDetector(getApplicationContext());
// Check for internet connection
if (!cd.isConnectingToInternet()) {
// Internet Connection is not present
alert.showAlertDialog(Muziek.this, "Internet Connectie Error", "Zorg voor een werkende internet connectie", false);
// stop executing code by return
return;
}
animation = (ImageView)findViewById(R.id.imageAnimation);
animation.setBackgroundResource(R.drawable.animation);
//Intent svc=new Intent(this, BackgroundSoundService.class);
//startService(svc);
initializeUIElements();
initializeMediaPlayer();
}
private void initializeUIElements() {
playSeekBar = (ProgressBar) findViewById(R.id.progressBar1);
playSeekBar.setMax(100);
playSeekBar.setVisibility(View.INVISIBLE);
animation.setVisibility(View.INVISIBLE);
buttonPlay = (Button) findViewById(R.id.button_play);
buttonPlay.setOnClickListener(this);
buttonStopPlay = (Button) findViewById(R.id.button_stop);
buttonStopPlay.setEnabled(false);
buttonStopPlay.setOnClickListener(this);
}
public void onClick(View v) {
if (v == buttonPlay) {
startPlaying();
} else if (v == buttonStopPlay) {
stopPlaying();
}
}
private void startPlaying() {
//I tried this but didn't work thats why i've commented it away
//new BackgroundSound().execute();
//Intent svc=new Intent(this, BackgroundSoundService.class);
// startService(svc);
pDialog = new ProgressDialog(Muziek.this);
pDialog.setMessage("Live radio laden ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
buttonStopPlay.setEnabled(true);
buttonPlay.setEnabled(false);
playSeekBar.setVisibility(View.INVISIBLE); // plaatje
AnimationDrawable frameAnimation =
(AnimationDrawable) animation.getBackground();
animation.setVisibility(View.INVISIBLE);
frameAnimation.start();
player.prepareAsync();
frameAnimation.start();
player.setOnPreparedListener(new OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
player.start();
// buttonRecord.setEnabled(true);
//new BackgroundSound().execute();
}
});
}
private void stopPlaying() {
if (player.isPlaying()) {
player.stop();
player.release();
initializeMediaPlayer();
}
buttonPlay.setEnabled(true);
buttonStopPlay.setEnabled(false);
playSeekBar.setVisibility(View.INVISIBLE);
animation.setVisibility(View.INVISIBLE);
//buttonRecord.setEnabled(false);
//buttonStopRecord.setEnabled(false);
//stopRecording();
}
private void initializeMediaPlayer() {
player = new MediaPlayer();
try {
player.setDataSource(RADIO_STATION_URL);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Intent svc=new Intent(this, BackgroundSoundService.class);
startService(svc);
player.setOnBufferingUpdateListener(new OnBufferingUpdateListener() {
public void onBufferingUpdate(MediaPlayer mp, int percent) {
playSeekBar.setSecondaryProgress(percent);
pDialog.dismiss();
animation.setVisibility(View.VISIBLE);
Log.i("Buffering", "" + percent);
}
});
}
@Override
protected void onPause() {
super.onPause();
if (player.isPlaying()) {
player.stop();
}
}
}