Android從服務中發送短信？

Question

我想發送短信當電池電量達到Service的特定值時。我沒有收到任何錯誤，但SMS未被髮送。

我的代碼：

  import android.app.Service; 
      import android.content.BroadcastReceiver; 
      import android.content.Context; 
      import android.content.Intent; 
      import android.content.IntentFilter; 
      import android.os.BatteryManager; 
      import android.os.IBinder; 
      import android.telephony.SmsManager; 
      import android.util.Log; 
      import android.widget.Toast; 


      public class BatteryStatus extends Service { 
     int scale = -1; 
      int level = -1; 
      int voltage = -1; 
      int temp = -1; 
      String batteryNumber = ""; 
      String moderate=" Battery Level is 50 "; 
      String low = "Battery Level is low. Need to be charged immediately"; 


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

     public void onCreate() { 
     super.onCreate(); 

     Toast.makeText(getApplicationContext(),"Service Running", Toast.LENGTH_SHORT).show(); 
     //BATTERY STATUS 
     BroadcastReceiver batteryReceiver = new BroadcastReceiver() { 

      @Override 
      public void onReceive(Context context, Intent intent) { 
       level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1); 
       scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1); 
       temp = intent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, -1); 
       voltage = intent.getIntExtra(BatteryManager.EXTRA_VOLTAGE, -1); 
       Log.e("BatteryManager", "level is "+level+"/"+scale+", temp is "+temp+", voltage is "+voltage); 
       Log.e("NumberBattery ", "Number is "+batteryNumber); 
      } 
     }; 

     IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED); 
     registerReceiver(batteryReceiver, filter); 
     if(batteryNumber!=null && level==49){ 

       SmsManager bat = SmsManager.getDefault(); 
       bat.sendTextMessage(batteryNumber,null,moderate,null,null); 
     }else if(batteryNumber!=null && level==20){ 
       SmsManager bat = SmsManager.getDefault(); 
       bat.sendTextMessage(batteryNumber, null,low, null, null); 
      } 

     } 




      } 

的logcat：

   03-09 03:41:40.390: E/BatteryManager(11086): level is 49/100, temp is 321, voltage is 7574 
      03-09 03:41:40.390: E/NumberBattery(11086): Number is

你能告訴什麼是錯的她呢？

Answer 1

這是因爲你永遠不會發送短信。

在執行以下行：

if (batteryNumber != null && level == 49){ 

level尚未初始化。

更改您這樣的代碼：

@Override 
public void onReceive(Context context, Intent intent) { 
    level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1); 
    scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1); 
    temp = intent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, -1); 
    voltage = intent.getIntExtra(BatteryManager.EXTRA_VOLTAGE, -1); 
    Log.e("BatteryManager", "level is "+level+"/"+scale+", temp is "+temp+", voltage is "+voltage); 
    Log.e("NumberBattery ", "Number is "+batteryNumber); 
    if (batteryNumber != null && level == 49) { 
     SmsManager bat = SmsManager.getDefault(); 
     bat.sendTextMessage(batteryNumber,null,moderate,null,null); 
    } else if(batteryNumber!=null && level==20){ 
     SmsManager bat = SmsManager.getDefault(); 
     bat.sendTextMessage(batteryNumber, null,low, null, null); 
    } 
}