Java Android广播流媒体-活动恢复-再次播放

我正在构建一个Android应用程序，它可以传输简单的广播电台

编辑：我添加了OnCreate事件和init函数

创建时：

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
        play_or_pause();

    }

init函数：

    public void init() {
            mediaPlayer = new MediaPlayer();
            stream_url = "http://the_radio_station.m3u8";
            playing_now = false;
            fb_error = "";
        }

在创建时，我调用AsyncTask方法：

play_or_pause();

public class play_or_pause_AsyncTask extends
            AsyncTask<Boolean, Integer, String> {

        @Override
        protected String doInBackground(Boolean... params) {
            // TODO Auto-generated method stub

            if (!params[0]) {
                fb_error = "";
                try {
                    if (mediaPlayer.isLooping() || mediaPlayer.isPlaying()) {
                        mediaPlayer.stop();
                    }
                    mediaPlayer.reset();
                    fb_error = String.valueOf(mediaPlayer.isPlaying());
                    mediaPlayer.setDataSource(stream_url);
                    mediaPlayer.prepare();
                    mediaPlayer.start();
                    playing_now = true;
                } catch (IllegalArgumentException e) {
                    // TODO Auto-generated catch block
                    fb_error += e.toString();
                } catch (SecurityException e) {
                    // TODO Auto-generated catch block
                    fb_error += e.toString();
                } catch (IllegalStateException e) {
                    // TODO Auto-generated catch block
                    fb_error += e.getMessage();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    fb_error += e.toString();
                }
            } else {
                mediaPlayer.stop();
                playing_now = false;
            }
            return fb_error;
        }

        @Override
        protected void onPostExecute(String result) {
            // TODO Auto-generated method stub
            super.onPostExecute(result);
//           Toast.makeText(MainActivity.this, fb_error, Toast.LENGTH_LONG).show();
        }
    }

异步任务方法：

play_or_pause();

public class play_or_pause_AsyncTask extends
            AsyncTask<Boolean, Integer, String> {

        @Override
        protected String doInBackground(Boolean... params) {
            // TODO Auto-generated method stub

            if (!params[0]) {
                fb_error = "";
                try {
                    if (mediaPlayer.isLooping() || mediaPlayer.isPlaying()) {
                        mediaPlayer.stop();
                    }
                    mediaPlayer.reset();
                    fb_error = String.valueOf(mediaPlayer.isPlaying());
                    mediaPlayer.setDataSource(stream_url);
                    mediaPlayer.prepare();
                    mediaPlayer.start();
                    playing_now = true;
                } catch (IllegalArgumentException e) {
                    // TODO Auto-generated catch block
                    fb_error += e.toString();
                } catch (SecurityException e) {
                    // TODO Auto-generated catch block
                    fb_error += e.toString();
                } catch (IllegalStateException e) {
                    // TODO Auto-generated catch block
                    fb_error += e.getMessage();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    fb_error += e.toString();
                }
            } else {
                mediaPlayer.stop();
                playing_now = false;
            }
            return fb_error;
        }

        @Override
        protected void onPostExecute(String result) {
            // TODO Auto-generated method stub
            super.onPostExecute(result);
//           Toast.makeText(MainActivity.this, fb_error, Toast.LENGTH_LONG).show();
        }
    }

但这无助于有人写到mediaPlayer对象很奇怪，你无法说出对象的真实状态，比如.isPlaying是否为真/假

---

那么在这种情况下我能做什么呢

如果您试图独立于活动状态流式传输/播放某些内容，则应该使用带有通知的前台服务。如果要在活动失去焦点时停止/暂停流，则需要在onPause中停止。不幸的是，这里没有包含活动生命周期方法。我添加了OnCreate事件和init函数