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我有一个带有 MediaPlayer 的活动和服务。我想控制这个玩家的活动。但是当我尝试重置播放器时，我的应用程序因 LogCat 中的 IllegalStateException 而崩溃。这是我的代码：

主要活动

Player service;


@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);

    //blah-blah-blah

    servIntent = new Intent(FeatherPlayerActivity.this, Player.class);
    connection = new ServiceConnection() {
        public void onServiceConnected(ComponentName name, IBinder binder) {
            Log.e("Feather Player", "Сервис подключен");
            if (!isTrayed) initialize();
        }

        public void onServiceDisconnected(ComponentName name) {

        }
    };
    bindService(servIntent, connection, 0);
    startService(servIntent);
    service = new Player();
    service.mediaPlayer = new MediaPlayer(); //just trying to define it again...
}

Player.class（服务）

public class Player extends Service
{
public MediaPlayer mediaPlayer = null;

public Player() {}

public void onCreate() {
    super.onCreate();
    if (mediaPlayer == null) mediaPlayer = new MediaPlayer();
}

public IBinder onBind(Intent intent) {
    if (mediaPlayer == null) mediaPlayer = new MediaPlayer();
    return new Binder();
}

public void onRebind(Intent intent) {
    super.onRebind(intent);
    try {
        mediaPlayer.stop();
    } catch (Exception ex) {}
}

public boolean onUnbind(Intent intent) {
    return super.onUnbind(intent);
}

public void onDestroy() {
    super.onDestroy();
    try {
        mediaPlayer.stop();
    } catch (Exception ex) {}
}
}

我如何尝试与玩家互动：

service.player.(command_name);

请帮我！PS对不起我糟糕的英语。

更新 LogCat

build.bootloader: unknown
build.brand: acer
build.cpu_abi: armeabi-v7a
build.cpu_abi2: armeabi
build.device: B1-A71
build.display: Acer_AV051_B1-A71_1.174.00_WW_GEN1
build.fingerprint: acer/B1-A71_ww_gen1/B1-A71:4.1.2/JZO54K/1361327270:user/release-keys
build.hardware: mt6517
build.host: asd1sd3
build.id: JZO54K
build.manufacturer: acer
build.model: B1-A71
build.product: B1-A71_ww_gen1
build.radio: unknown
build.serial: 31108826315
build.tags: release-keys
build.time: 1361327270000
build.type: user
build.user: root
version.codename: REL
version.incremental: eng.root.1361327219
version.release: 4.1.2
version.sdk_int: 16

11-10 11:42:14.727 E/AndroidRuntime(32280): FATAL EXCEPTION: main
11-10 11:42:14.727 E/AndroidRuntime(32280): java.lang.IllegalStateException
11-10 11:42:14.727 E/AndroidRuntime(32280):     at android.media.MediaPlayer._reset(Native Method)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at android.media.MediaPlayer.reset(MediaPlayer.java:1336)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at ru.vspr.FeatherPlayerActivity.loadMusic(FeatherPlayerActivity.java:332)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at ru.vspr.FeatherPlayerActivity.loadTrack(FeatherPlayerActivity.java:321)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at ru.vspr.FeatherPlayerActivity.initialize(FeatherPlayerActivity.java:185)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at ru.vspr.FeatherPlayerActivity.access$1000002(FeatherPlayerActivity.java)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at ru.vspr.FeatherPlayerActivity$100000000.onServiceConnected(FeatherPlayerActivity.java:72)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1127)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1144)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at android.os.Handler.handleCallback(Handler.java:615)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at android.os.Handler.dispatchMessage(Handler.java:92)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at android.os.Looper.loop(Looper.java:153)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at android.app.ActivityThread.main(ActivityThread.java:4987)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at java.lang.reflect.Method.invokeNative(Native Method)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at java.lang.reflect.Method.invoke(Method.java:511)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584)
11-10 11:42:14.727 E/AndroidRuntime(32280):     at dalvik.system.NativeStart.main(Native Method)
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