ortam yürütücüsü, yatay modda ses dosyası (.wav) ile yatay modda oynatılır

Question

Aşağıdaki kodu Ses Çalma dosyasına (.wav) kullanıyorum, ancak Echo'yu (iki sesin aynı anda çalınması gibi) etkinlik çalışırken Peyzaj modu.

public class Find_n_Display_StationActivity extends Activity 
{ 
GPSTracker gps; 
TextView txtvw,locNameTV; 
boolean calculating_distance=false; 
ArrayList<String>data=new ArrayList<String>(); 
ArrayList<String>latArray=new ArrayList<String>(); 
ArrayList<String>longArray=new ArrayList<String>(); 
MySQLiteHelper db = new MySQLiteHelper(this); 

ImageView profileIV; 
PendingIntent intent; 
String reached_station="empty"; 
MediaPlayer mp; 

@Override 
protected void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.find_n__display__statn_activity); 

    txtvw=(TextView)findViewById(R.id.textView2); 
    locNameTV=(TextView)findViewById(R.id.textView1); 
    profileIV=(ImageView)findViewById(R.id.image11); 


    profileIV.setVisibility(View.GONE); 

    //Put in LANDSCAPE MODE... 
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);  



    //Show FULL-SCREEN Activity 
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); 

    //Calling/Starting Thread to Handl Uncaught Exeption 
    Thread.setDefaultUncaughtExceptionHandler(onRuntimeError); 

     //((((This will retrieve DATA from service to this Activity)))) 
     gps = new GPSTracker(this); 
     LocalBroadcastManager.getInstance(this.getApplicationContext()).registerReceiver(
      mMessageReceiver, new IntentFilter("GPSLocationUpdates")); 

     // mp=new MediaPlayer(); 

}//EOF Oncreate Method... 

//((((This Function is Called if App Crash, So, App is start Automatically after crash)))) 
private Thread.UncaughtExceptionHandler onRuntimeError= new Thread.UncaughtExceptionHandler() 
{ 
     public void uncaughtException(Thread thread, Throwable ex) 
     { 
      Intent i=new Intent(getApplicationContext(),MainActivity.class); 
      i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK); 
      i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
      startActivity(i); 
     } 
}; 


// (((( This Class Get Data From Service class GPSTracker.class())))) 
private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() 
     { 
      @Override 
      public void onReceive(Context context, Intent intent) { 
       // Get extra data included in the Intent 
       String message = intent.getStringExtra("Status"); 
       Bundle b = intent.getBundleExtra("Location"); 
      Location lastKnownLoc = (Location) b.getParcelable("Location"); 
       if (lastKnownLoc != null) 
       { 
        String s1=String.valueOf(lastKnownLoc.getLatitude()); 
        String s2=String.valueOf(lastKnownLoc.getLongitude()); 

       double current_lat=Double.parseDouble(s1); 
       double current_long=Double.parseDouble(s2); 
       txtvw.setText("____________________________\n\n\n"+current_lat+"\n"+current_long); 
       //showtoast("You have changed your Location"); 

       if(calculating_distance==false) 
       { 
        calculating_distance=true; 

        FindDistance(current_lat,current_long); 
       } 

       Turn_On_Screen(); 
       } 
      }}; 
private String stationPlayed="empty"; 


@SuppressWarnings("deprecation") 
public void Turn_On_Screen() 
{ 
    WakeLock screenLock = ((PowerManager)getSystemService(POWER_SERVICE)).newWakeLock(
      PowerManager.SCREEN_BRIGHT_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "TAG"); 
     screenLock.acquire(); 

     //later 
     //screenLock.release(); 
} 

      //((((Find Distance Betwee All Points)))))) 
public void FindDistance(double current_lat,double current_long) 
{ 
    Move_App_Back_to_ForeGround(); 

    ArrayList<String>stationNameArray=new ArrayList<String>(); 
    ArrayList<String>imageArray=new ArrayList<String>(); 
    ArrayList<String>voiceArray=new ArrayList<String>(); 

    imageArray=db.Get_ImageList(); 
    voiceArray=db.Get_VoiceList(); 

    stationNameArray=db.Get_StionNameAraay(); 

    latArray=db.Get_LatAraay(); 
    longArray=db.Get_LongAraay(); 

    float smallest_dis=10000; 
    String next_station=""; 
    boolean found_station=false; 

    for(int i=1;i<latArray.size();i++) 
    { 
     float lat1 = Float.parseFloat(latArray.get(i)); 
     float long1 = Float.parseFloat(longArray.get(i)); 

     float dis=FindDistance((float)current_lat,(float)current_long,lat1, long1); 
     if(dis<smallest_dis) 
     { 
      smallest_dis=dis; 
      next_station=stationNameArray.get(i); 

     } 
     if(dis<=50) 
     { 
      Set_Pic_n_Voice(imageArray.get(i),voiceArray.get(i),stationNameArray.get(i)); 
      // showtoast("station-name="+ stationNameArray.get(i)); 
     break;   
     } 

    } 
    locNameTV.setText("You are Heading towards Station="+next_station+"\n You are only "+smallest_dis+" Meter away..."); 

    calculating_distance=false; 

} 


public void Set_Pic_n_Voice(String image,final String voice,final String station_name) 
{ 
    DisplayImage(image); 

     if(!reached_station.equalsIgnoreCase(station_name)) 
     reached_station=""+station_name; //Don't play voice for same station just display pic always 

    //Wait for 4 seconds to play this voice 
    Runnable r = new Runnable() 
    { 

     public void run() 
     { 
      if(!stationPlayed.equalsIgnoreCase(station_name)) 
      { 
       PlayVoice(voice); 
       stationPlayed=station_name; 
      } 
     } 
    }; 

    android.os.Handler h = new android.os.Handler(); 
    h.postDelayed(r, 5000);// */ 



} 


//((((Displaying Picture For the Station)))) 
public void DisplayImage(String image) 
{ 
    profileIV.setVisibility(View.VISIBLE); 

     File imageFile = new File(Environment.getExternalStorageDirectory()+File.separator+"Bus_StationApp_Folder/Images",image); 

     if (imageFile.exists()) 
     { 

    File imgFile = new File(imageFile.getAbsolutePath()); // path of your file 
    Picasso.with(this).load(Uri.fromFile(new File(imageFile.getAbsolutePath()))).into(profileIV); 
     /* 
       FileInputStream fis = null; 
       try { 
        fis = new FileInputStream(imgFile); 
       } catch (FileNotFoundException e) 
       { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
       } 
       BitmapFactory.Options options = new BitmapFactory.Options(); 
       //options.inSampleSize = 8; 
       //options.inPurgeable = true; 
       // options.inScaled = true; 
       Bitmap bm = BitmapFactory.decodeStream(fis, null,options); 
       profileIV.setImageBitmap(bm);//*/ 
     } 
     else 
      profileIV.setImageResource(R.drawable.default_station_pic); 

} 


//((((Playing Voice For The Station)))))) 
public void PlayVoice(String voice) 
{ 

    calculating_distance=true; 

// Play_Audio_File ob=new Play_Audio_File(this); 
    //ob.PlayVoice(voice); 

    File voiceFile = new File(Environment.getExternalStorageDirectory()+File.separator+"Bus_StationApp_Folder/Voices",voice); 

    if (voiceFile.exists()) 
    { 


    if(!mp.isPlaying()) 
     { 

      mp.reset(); 

     try { 
      mp.setDataSource(voiceFile.getAbsolutePath()); 
      mp.prepare(); 
     } catch (IllegalArgumentException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (SecurityException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IllegalStateException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

     mp.start(); 
     } 
     mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() 
     { 
      public void onCompletion(MediaPlayer mp) 
      { 
       calculating_distance=false; 
      } 
     }); 
    } 
    else    
    { 
     //mp.reset(); 
     mp= MediaPlayer.create(this, R.drawable.default_station_voice); 
     if(!mp.isPlaying()) 
      { 

      mp.start(); 
      } 
     mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() 
     { 
       public void onCompletion(MediaPlayer mp) 
       { 
        calculating_distance=false; 
       } 
      }); 

    } 

    //*/ 


} 

     //(((((Find distance between two geolocation ))) 
public float FindDistance(float lat1, float lng1, float lat2, float lng2) 
     { 
      double earthRadius = 6371000; //meters 
       double dLat = Math.toRadians(lat2-lat1); 
       double dLng = Math.toRadians(lng2-lng1); 
       double a = Math.sin(dLat/2) * Math.sin(dLat/2) + 
          Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2)) * 
          Math.sin(dLng/2) * Math.sin(dLng/2); 
       double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
       float dist = (float) (earthRadius * c); 

       return dist; 

     } 


//(((Move App To Screen from Background)))) 
public void Move_App_Back_to_ForeGround() 
{ 
    boolean foregroud=false; 
    try 
    { 
    foregroud = new ForegroundCheckTask().execute(getApplicationContext()).get(); 
    } catch (InterruptedException e) 
    { e.printStackTrace(); 
    } 
    catch (ExecutionException e) 
    { 
     e.printStackTrace(); 
    } 

    if(!foregroud) 
    { 
    //Open Activity IF it is in Background... 
    Intent it = new Intent("intent.my.action"); 
    it.setComponent(new ComponentName(this.getPackageName(), Find_n_Display_StationActivity.class.getName())); 
    it.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
    this.getApplicationContext().startActivity(it); 


    } 
} 

class ForegroundCheckTask extends AsyncTask<Context, Void, Boolean> { 

     @Override 
     protected Boolean doInBackground(Context... params) { 
     final Context context = params[0].getApplicationContext(); 
     return isAppOnForeground(context); 
     } 

     private boolean isAppOnForeground(Context context) { 
     ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); 
     List<RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses(); 
     if (appProcesses == null) { 
      return false; 
     } 
     final String packageName = context.getPackageName(); 
     for (RunningAppProcessInfo appProcess : appProcesses) { 
      if (appProcess.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND && appProcess.processName.equals(packageName)) { 
      return true; 
      } 
     } 
     return false; 
     } 
    } 


//SHOW-TOAST-MESSAGE 
public void showtoast(String str) 
{ 
    Toast.makeText(getApplicationContext(), str, Toast.LENGTH_LONG).show(); 
} 

public void OnBackPressed() 
{ 

} 

} // EOF Etkinliği ... Her nasılsa iki kez PlayVoice() yöntemi aradığınız

Answer 1

. İçinizdeki if ifadesinin bunu engellememesi nedeni, PlayVoice() numaralı telefonu aramadan önce mp = new MediaPlayer(); numaralı telefonu aramanız gerektiğinden, aksi takdirde bu yönteme yapılan ilk çağrı, mp.isPlaying() numaralı telefondan if koşulunda NullPointerException sonucunu verir. mp şimdi yeni bir MediaPlayer örneğini işaret ettiğinden, isPlaying()false döndürür ve if bloğu, önceki örnek hala oynatılsa bile yeniden yürütülür.

, beyan doğrultusunda sadece bir kez MediaPlayer örneğini eş zamanlı oynayan MediaPlayer birden çok örneğini önlemek (ve başka bir yerde bunu olabilir) PlayVoice() içinde mp = new MediaPlayer(); hattını kaldırmak ve orada mp.reset(); çağrıyı un-eklenmedi. Eğer Activity 'ın onCreate() yönteminde peyzaja bir yön değişikliğini isteğinde çünkü

---

PlayVoice() yöntem iki kez çağrıldığını ve yapılandırma değişikliklerini kendiniz taşıma değiliz. Bu, Activity'un dikey modda yok edilmesine ve yeniden oluşturulmasına neden oluyor, yani onCreate() ikinci kez çalıştırılıyor, ancak ilk Activity örneğinde başlatılan MediaPlayer örneği, ikinci örnekte yeni bir tane oluşturulduğunda ve başlatıldığında hala yürüyor.

Başlangıcından yatay yönde başlatmak için Activity'u zorlayarak bunun olmasını önleyebilirsiniz. Bildiride, etiketine android:screenOrientation="landscape" ekleyerek bunu yapabilirsiniz. Artık gerekmediğinden setRequestedOrientation() aramasını da kaldırabilirsiniz.