我正在搜索如何在后台运行Shoutcast流的内容/类型： audio / AACP 。 目前，我正在使用库aacdecoder-android获取运行流，但不了解如何使用服务将流保留在后台。 有没有人用过这样的东西？
代码：
MainActivity：
public class MainActivity extends Activity {
public AACPlayer mp;
private Toast myToast;
private Handler mHandler;
private ImageParser mImageParser;
private WebView publicidadecapa;
@Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add("Sair");
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getTitle().toString() == "Sair") {
finish();
}
return super.onOptionsItemSelected(item);
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.maintab);
mp = new AACPlayer(new RadioCallBack(this));
ProgressBar loading = (ProgressBar) findViewById(R.id.loadingAudio);
loading.setVisibility(View.INVISIBLE);
ImageView playButton = (ImageView) findViewById(R.id.playButton);
playButton.setTag("1");
playButton.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
ImageView playButton = (ImageView) arg0;
ConnectivityManager cm =
(ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
if ( cm.getActiveNetworkInfo() == null || !cm.getActiveNetworkInfo().isConnectedOrConnecting() ) {
if (myToast == null) {
myToast = Toast.makeText(getBaseContext(), "Verifique a conexão com a internet", 5000);
}
myToast.setDuration(5000);
myToast.show();
return;
}
if (playButton.getTag() == "1" && cm.getActiveNetworkInfo().isConnectedOrConnecting() ) {
playButton.setImageResource(R.drawable.btn_menustop);
playButton.setTag("0");
playButton.setVisibility(View.INVISIBLE);
ProgressBar loading = (ProgressBar) findViewById(R.id.loadingAudio);
loading.setVisibility(View.VISIBLE);
((TextView)findViewById(R.id.textView1)).setText("Conectando...");
mp.playAsync( "http://voxsc1.somafm.com:9002/" );
} else if ( playButton.getTag() == "0" ) {
playButton.setVisibility(View.INVISIBLE);
ProgressBar loading = (ProgressBar) findViewById(R.id.loadingAudio);
loading.setVisibility(View.VISIBLE);
playButton.setImageResource(R.drawable.btn_menuplay);
playButton.setTag("1");
mp.stop();
}
}
});
final AudioManager audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
SeekBar volumeControl = (SeekBar) findViewById(R.id.volumeControl);
volumeControl.setMax(audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC));
volumeControl.setProgress(audioManager.getStreamVolume(AudioManager.STREAM_MUSIC));
volumeControl.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
public void onStopTrackingTouch(SeekBar arg0) {
}
public void onStartTrackingTouch(SeekBar arg0) {
}
public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, arg1,0);
if(arg1 == 0) {
((ImageView) findViewById(R.id.imageView2)).setImageResource(R.drawable.ic_volume2);
} else {
((ImageView) findViewById(R.id.imageView2)).setImageResource(R.drawable.ic_volume1);
}
}
});
}
@Override
public void onStop() {
super.onStop();
}
@Override
protected void onDestroy() {
if (this.isFinishing()) {
//mp.stop();
}
super.onDestroy();
}
public void onStart()
{
super.onStart();
// your code
}
public Object fetch(String address) throws MalformedURLException,IOException {
URL url = new URL(address);
Object content = url.getContent();
return content;
}
private Boolean isOnline() {
ConnectivityManager cm =
(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo ni = cm.getActiveNetworkInfo();
if(ni != null && ni.isConnected())
return true;
return false;
}
/* Abrir em uma nova aba o link da publicidade */
public class MyWebClient extends WebViewClient{
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
//Uri uri = Uri.parse(url);
Context context = view.getContext();
Intent intent = new Intent(context,OpenSiteWebView.class);
Bundle parametros = new Bundle();
parametros.putString("url", url);
intent.putExtras(parametros);
startActivity(intent);
return true;
}
}
}
RadioCallBack：
public class RadioCallBack implements PlayerCallback {
private MainActivity activity;
public RadioCallBack(MainActivity activity) {
super();
this.activity = activity;
}
public void playerException(Throwable arg0) {
activity.runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(activity, "O stream pode estar offline! Tente novamente mais tarde", 50000).show();
ProgressBar loading = (ProgressBar) activity.findViewById(R.id.loadingAudio);
loading.setVisibility(View.INVISIBLE);
ImageView playButton = (ImageView) activity.findViewById(R.id.playButton);
playButton.setVisibility(View.VISIBLE);
playButton.setImageResource(R.drawable.btn_menuplay);
playButton.setTag("1");
((TextView)activity.findViewById(R.id.textView1)).setText("Pressione PLAY para tocar!");
}
});
}
public void playerPCMFeedBuffer(boolean arg0, int arg1, int arg2) {
// TODO Auto-generated method stub
}
public void playerStarted() {
activity.runOnUiThread(new Runnable() {
public void run() {
ProgressBar loading = (ProgressBar) activity.findViewById(R.id.loadingAudio);
loading.setVisibility(View.INVISIBLE);
ImageView playButton = (ImageView) activity.findViewById(R.id.playButton);
playButton.setVisibility(View.VISIBLE);
((TextView)activity.findViewById(R.id.textView1)).setText("Mais música brasileira");
}
});
}
public void playerStopped(int arg0) {
activity.runOnUiThread(new Runnable() {
public void run() {
activity.mp = null;
activity.mp = new AACPlayer(new RadioCallBack(activity));
ProgressBar loading = (ProgressBar) activity.findViewById(R.id.loadingAudio);
loading.setVisibility(View.INVISIBLE);
ImageView playButton = (ImageView) activity.findViewById(R.id.playButton);
playButton.setVisibility(View.VISIBLE);
((TextView)activity.findViewById(R.id.textView1)).setText("Pressione PLAY para tocar!");
}
});
}
}
答案 0 :(得分：0)
“使用服务” - 右：android服务为您的应用程序组件授予额外的运行权限，即使组件不在任务堆栈之上，甚至退出应用程序时，它们仍然存在。大多数时候，除了那些缺乏关键资源的情况外，系统不会干扰和停止服务，所以由你来决定如何控制它。
特别针对您的情况，官方网站上有an article关于构建具有后台播放功能的播放器。然而他们谈论的是MediaPlayer，我认为，相同的原则适用于任何自定义播放器。
祝你好运。答案 1 :(得分：0)
您必须制作后台服务才能让您的音乐播放器在后台运行。
1，您必须启动该服务。然后在Service的onCreate（）方法中初始化MultiPlayer对象。
然后在您的UI活动（具有您的多人游戏UI）上实施ServiceConnection。这将连接您的UI活动与后台服务。现在您可以控制后台服务和多人游戏对象，例如播放，暂停功能。请参阅this实现ServiceConnection。
如果您希望用户通过点击通知栏中的通知导航回ui，也可以设置serviceForground。
希望这有帮助