Question

引用LogCat时出错。我存储了存储卡（1st）并与currentsimcard（2nd）进行比较，如果sim串口不同，logcat将打印出sim更改。但是当我运行它时，我的服务有问题。以下是我的代码

LogCat显示

Tag SimSerial::            8944110065486249080  
Tag Current Sim Serial::   8944110065486249080  
Tag Sim Status             Sim no changed !!!  

Tag SimSerial::            8944110065486249080   
Tag Current Sim Serial::   8944110065486249080   
Tag Sim Status             Sim changed !!!

第一部分是正确的，但第二部分Sim状态应该没有＆＃34; Sim没有改变＆＃34;同样。有谁知道错误在哪里？

BootCompleteReceiver

public class BootCompleteReceiver extends BroadcastReceiver {   

    Context context;
    SharedPreferences settings;
    public static final String PREFS_NAME = "MyPrefsFile";

     @Override  
    public void onReceive(Context context, Intent intent) {  

        Intent service = new Intent(context, MyService.class);  
        context.startService(service);   

    }  

}

为MyService

public class MyService extends Service {  

    String storedSimSerial;
    String currentSimSerial;

    @Override  
    public void onCreate() {  
        super.onCreate();    
    }  

    @Override  
    public int onStartCommand(Intent intent, int flags, int startId) {  

        Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();

        TelephonyManager telephoneMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
        storedSimSerial = telephoneMgr.getSimSerialNumber();
        Log.e("SimSerial::",storedSimSerial);

        TelephonyManager tmMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
        currentSimSerial = tmMgr.getSimSerialNumber();
        Log.e("Current Sim Serial::",currentSimSerial);

        if(currentSimSerial==storedSimSerial)
        {
            Log.e("Sim Status","Sim no changed !!!");
        }             
        else
            Log.e("Sim Status","Sim changed !!!");

        return Service.START_STICKY;  
    }  

    @Override
    public void onDestroy() {

        super.onDestroy();
        Toast.makeText(this, "Service Destroy", Toast.LENGTH_LONG).show();
    }

    @Override  
    public IBinder onBind(Intent arg0) {  
        return null;  
    }  
}

Answer 1

像这样写if：

    if(currentSimSerial.equals(storedSimSerial))
    {
        Log.e("Sim Status","Sim no changed !!!");
    }             
    else
        Log.e("Sim Status","Sim changed !!!");

当你使用==时，你比较对象引用，而不是很少用于字符串的内容。

Log Sim Change Detect，Log.e中的错误

1 个答案: