android - 开始/停止按钮 radio 流服务

Question

我有来自这个网站的 radio 流应用程序的代码 radio stream example ，但是当我想停止流时，它会重新启动。停止它的唯一方法是退出应用程序并通过“最近使用的应用程序”按钮或通知屏幕返回应用程序。

有人可以帮我处理代码吗？

流服务.java

package id.pratama.example.streamingaudio.service;

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.support.v4.app.NotificationCompat;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.widget.Toast;

import java.io.IOException;

import id.pratama.example.streamingaudio.MainActivity;
import id.pratama.example.streamingaudio.R;

/**
 * Created by pratama on 4/22/14.
 */
public class StreamService extends Service implements
        MediaPlayer.OnCompletionListener,
        MediaPlayer.OnPreparedListener,
        MediaPlayer.OnErrorListener,
        MediaPlayer.OnBufferingUpdateListener {

    /**
     * for educational only
     */
    // public static final String URL_STREAM = "http://jkt.jogjastreamers.com:8000/jisstereo?s=02766";

    // radio UNISI
    public static final String URL_STREAM = "http://202.162.32.23:8000";

    // notification
    private static final int NOTIFICATION_ID = 1;
    private PhoneStateListener phoneStateListener;
    private TelephonyManager telephonyManager;
    private boolean isPausedInCall = false;
    private NotificationCompat.Builder builder;

    //intent
    private Intent bufferIntent;

    public static final String BROADCAST_BUFFER = "id.pratama.example.streamingaudio.broadcastbuffer";

    private MediaPlayer mediaPlayer = new MediaPlayer();

    @Override
    public void onCreate() {
        super.onCreate();
        Log.d("create", "service created");

        bufferIntent = new Intent(BROADCAST_BUFFER);

        mediaPlayer.setOnCompletionListener(this);
        mediaPlayer.setOnPreparedListener(this);
        mediaPlayer.setOnErrorListener(this);
        mediaPlayer.setOnBufferingUpdateListener(this);

        mediaPlayer.reset();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.d("play", "play streaming");

        telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
        phoneStateListener = new PhoneStateListener() {
            @Override
            public void onCallStateChanged(int state, String incomingNumber) {
                switch (state) {
                    case TelephonyManager.CALL_STATE_OFFHOOK:
                    case TelephonyManager.CALL_STATE_RINGING:
                        if (mediaPlayer != null) {
                            pauseMedia();
                            isPausedInCall = true;
                        }
                        break;
                    case TelephonyManager.CALL_STATE_IDLE:
                        if (mediaPlayer != null) {
                            if (isPausedInCall) {
                                isPausedInCall = false;
                                playMedia();
                            }
                        }
                        break;
                }
            }
        };

        telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);

        initNotification();

        mediaPlayer.reset();

        /**
         * play media
         */
        if (!mediaPlayer.isPlaying()) {
            try {
                Log.d("streamm", "" + URL_STREAM);
                mediaPlayer.setDataSource(URL_STREAM);

                // sent to UI radio is buffer
                sendBufferingBroadcast();

                mediaPlayer.prepareAsync();
            } catch (IllegalArgumentException e) {
                Log.d("error", e.getMessage());
            } catch (IllegalStateException e) {
                Log.d("error", e.getMessage());
            } catch (IOException e) {
                Log.d("error", e.getMessage());
            }
        }

        return START_STICKY;
    }


    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onBufferingUpdate(MediaPlayer mediaPlayer, int i) {
    }


    @Override
    public void onCompletion(MediaPlayer mediaPlayer) {
        stopMedia();
        stopSelf();
    }


    @Override
    public boolean onError(MediaPlayer mediaPlayer, int what, int extra) {
        switch (what) {
            case MediaPlayer.MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK:
                Toast.makeText(this, "Error not valid playback", Toast.LENGTH_SHORT).show();
                break;
            case MediaPlayer.MEDIA_ERROR_SERVER_DIED:
                Toast.makeText(this, "Error server died", Toast.LENGTH_SHORT).show();
                break;
            case MediaPlayer.MEDIA_ERROR_UNKNOWN:
                Toast.makeText(this, "Error unknown", Toast.LENGTH_SHORT).show();
                break;
        }
        return false;
    }


    @Override
    public void onPrepared(MediaPlayer mediaPlayer) {
        // sent to UI, audio has buffered
        sendBufferCompleteBroadcast();

        playMedia();
    }


    private void pauseMedia() {
        if (mediaPlayer.isPlaying())
            mediaPlayer.pause();
    }

    private void playMedia() {
        if (!mediaPlayer.isPlaying()) {
            mediaPlayer.start();
        }
    }

    private void stopMedia() {
        if (mediaPlayer.isPlaying())
            mediaPlayer.stop();
    }

    /**
     * sent buffering
     */
    private void sendBufferingBroadcast() {
        bufferIntent.putExtra("buffering", "1");
        sendBroadcast(bufferIntent);
    }

    /**
     * sent buffering complete
     */
    private void sendBufferCompleteBroadcast() {
        bufferIntent.putExtra("buffering", "0");
        sendBroadcast(bufferIntent);
    }


    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.d("tag", "remove notification");
        if (mediaPlayer != null) {
            if (mediaPlayer.isPlaying()) {
                mediaPlayer.stop();
            }
            mediaPlayer.release();
        }

        if (phoneStateListener != null) {
            telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_NONE);
        }

        cancelNotification();
    }

    /**
     * show notificaiton
     */
    private void initNotification() {
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        PendingIntent intent = PendingIntent.getActivity(this, 0, new Intent(this, MainActivity.class), 0);
        builder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.ic_launcher)
                .setContentTitle("Stream Radio")
                .setContentText("895 JIZ fm");
        builder.setContentIntent(intent);
        builder.setOngoing(true);
        notificationManager.notify(NOTIFICATION_ID, builder.build());

    }

    /**
     * cancel notification
     */
    private void cancelNotification() {
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.cancel(NOTIFICATION_ID);
        builder.setOngoing(false);
    }


}

主 Activity .java

package id.pratama.example.streamingaudio;

import android.app.ProgressDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import id.pratama.example.streamingaudio.service.StreamService;
import id.pratama.example.streamingaudio.utils.Utils;


public class MainActivity extends ActionBarActivity implements View.OnClickListener {

    private Intent serviceIntent;
    private Button btnPlay;
    private static boolean isStreaming = false;
    private ProgressDialog pdBuff = null;
    private boolean mBufferBroadcastIsRegistered;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        btnPlay = (Button) findViewById(R.id.btnPlay);
        btnPlay.setOnClickListener(this);

        serviceIntent = new Intent(this, StreamService.class);
        isStreaming = Utils.getDataBooleanFromSP(this, Utils.IS_STREAM);
        if (isStreaming)
            btnPlay.setText("Stop");
    }


    @Override
    public void onClick(View view) {
        if (view == btnPlay) {
            Log.d("playStatus", "" + isStreaming);

            if (!isStreaming) {
                btnPlay.setText("Stop");
                startStreaming();
                Utils.setDataBooleanToSP(this, Utils.IS_STREAM, true);
            } else {
                if (isStreaming) {
                    btnPlay.setText("Start");
                    Toast.makeText(this, "Stop Streaming..", Toast.LENGTH_SHORT).show();
                    stopStreaming();
                    isStreaming = false;
                    Utils.setDataBooleanToSP(this, Utils.IS_STREAM, false);
                }
            }
        }
    }


    @Override
    protected void onPause() {
        super.onPause();
        if (mBufferBroadcastIsRegistered) {
            unregisterReceiver(broadcastBufferReceiver);
            mBufferBroadcastIsRegistered = false;
        }

    }

    @Override
    protected void onResume() {
        super.onResume();
        if (!mBufferBroadcastIsRegistered) {
            registerReceiver(broadcastBufferReceiver, new IntentFilter(
                    StreamService.BROADCAST_BUFFER));
            mBufferBroadcastIsRegistered = true;
        }
    }

    private void startStreaming() {
        Toast.makeText(this, "Start Streaming..", Toast.LENGTH_SHORT).show();
        stopStreaming();
        try {
            startService(serviceIntent);
        } catch (Exception e) {
        }

    }

    private void stopStreaming() {
        try {
            stopService(serviceIntent);
        } catch (Exception e) {

        }
    }

    private BroadcastReceiver broadcastBufferReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent bufferIntent) {
            showProgressDialog(bufferIntent);
        }
    };

    private void showProgressDialog(Intent bufferIntent) {
        String bufferValue = bufferIntent.getStringExtra("buffering");
        int bufferIntValue = Integer.parseInt(bufferValue);
        switch (bufferIntValue) {
            case 0:
                if (pdBuff != null) {
                    pdBuff.dismiss();
                }
                break;

            case 1:
                pdBuff = ProgressDialog.show(MainActivity.this, "",
                        "Streaming...", true);
                break;
        }
    }
}

Answer 1

终于自己弄明白了!

编辑 MainActivity.java 并使用此代码

package id.pratama.example.streamingaudio;

import android.app.ProgressDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import id.pratama.example.streamingaudio.service.StreamService;
import id.pratama.example.streamingaudio.utils.Utils;


public class MainActivity extends ActionBarActivity implements View.OnClickListener {

    private Intent serviceIntent;
    private Button btnPlay;
    private static boolean isStreaming;
    private ProgressDialog pdBuff = null;
    private boolean mBufferBroadcastIsRegistered;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        btnPlay = (Button) findViewById(R.id.btnPlay);
        btnPlay.setOnClickListener(this);

        serviceIntent = new Intent(this, StreamService.class);
        isStreaming = Utils.getDataBooleanFromSP(this, Utils.IS_STREAM);
        if (isStreaming)
            btnPlay.setText("Stop");
    }


    @Override
    public void onClick(View view) {
        if (view == btnPlay) {
            Log.d("playStatus", "" + isStreaming);

            if (!isStreaming) {
                btnPlay.setText("Stop");
                startStreaming();
                isStreaming = true;
                Utils.setDataBooleanToSP(this, Utils.IS_STREAM, true);
            } else {
                if (isStreaming) {
                    btnPlay.setText("Start");
                    Toast.makeText(this, "Stop Streaming..", Toast.LENGTH_SHORT).show();
                    stopStreaming();
                    isStreaming = false;
                    Utils.setDataBooleanToSP(this, Utils.IS_STREAM, false);
                }
            }
        }
    }


    @Override
    protected void onPause() {
        super.onPause();
        if (mBufferBroadcastIsRegistered) {
            unregisterReceiver(broadcastBufferReceiver);
            mBufferBroadcastIsRegistered = false;
        }

    }

    @Override
    protected void onResume() {
        super.onResume();
        if (!mBufferBroadcastIsRegistered) {
            registerReceiver(broadcastBufferReceiver, new IntentFilter(
                    StreamService.BROADCAST_BUFFER));
            mBufferBroadcastIsRegistered = true;
        }
    }

    private void startStreaming() {
        Toast.makeText(this, "Start Streaming..", Toast.LENGTH_SHORT).show();
        stopStreaming();
        try {
            startService(serviceIntent);
        } catch (Exception e) {
        }

    }

    private void stopStreaming() {
        try {
            stopService(serviceIntent);
        } catch (Exception e) {

        }
    }

    private BroadcastReceiver broadcastBufferReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent bufferIntent) {
            showProgressDialog(bufferIntent);
        }
    };

    private void showProgressDialog(Intent bufferIntent) {
        String bufferValue = bufferIntent.getStringExtra("buffering");
        int bufferIntValue = Integer.parseInt(bufferValue);
        switch (bufferIntValue) {
            case 0:
                if (pdBuff != null) {
                    pdBuff.dismiss();
                }
                break;

            case 1:
                pdBuff = ProgressDialog.show(MainActivity.this, "",
                        "Streaming...", true);
                break;
        }
    }
}