Java 无法检测android中的SIM卡更改

嗨，朋友们，我正在使用以下代码检测SIM卡更改，但无法获得结果。 请告诉我哪里出了错

我使用MainActivity.java类存储SIM msisdn。像这样

public class MainActivity extends Activity {
String FILENAME = "old_file.txt";
int simstatus;
String msisdn;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    TelephonyManager tManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
    simstatus = tManager.getSimState();
    if (simstatus != TelephonyManager.SIM_STATE_ABSENT) {
        System.out.println("--------SIM Present:" + simstatus);
        msisdn = tManager.getLine1Number();
        FileOutputStream fos;
        try {
            fos = openFileOutput(FILENAME, Context.MODE_PRIVATE);
            fos.write(msisdn.getBytes());
            System.out.println("---------Data written to files is:"
                    + msisdn);
            fos.close();
        } catch (Exception e) {
            e.printStackTrace();

        }
    }

}

为了接收重新启动事件，我使用SIMTestReceiver类，如下所示

public class SIMTestReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    if ("android.intent.action.BOOT_COMPLETED".equals(intent.getAction()))  {
        Intent CompareSimServiceIntent = new Intent(context,TestDATAScreen.class);
        context.startService(CompareSimServiceIntent);
    }

}

public class TestDATAScreen extends Service {

String FILENAME = "old_file.txt";

@Override
public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public int onStartCommand(Intent intent, int flags, final int startId) {
    Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();
    TelephonyManager tManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
    try {
        FileInputStream fis = openFileInput(FILENAME);
        InputStreamReader in = new InputStreamReader(fis);
        BufferedReader br = new BufferedReader(in);
        String data = br.readLine();
        System.out.println("---Data Read From File is:" + data);
        String newsiminfo = tManager.getLine1Number();
        System.out.println("---New SIM no is:" + newsiminfo);
        if (data.equals(tManager.getLine1Number())) {
            System.out.println("------Old sim Present:");

            Toast.makeText(this, "Old SIM", Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(this, "New SIM", Toast.LENGTH_LONG).show();
            SmsManager smsMngr = SmsManager.getDefault();
            String destinationaddress = "8689908070";
            String scAddress = null;
            String text = "New Sim Is Inserted In Your Device";
            PendingIntent sentIntent = null;
            PendingIntent deliveryIntent = null;
            smsMngr.sendTextMessage(destinationaddress, scAddress, text,
                    sentIntent, deliveryIntent);
            System.out.println("-----SMS Send");
        }

    } catch (Exception e) {

    }
    return startId;

}

为了比较旧SIM卡和新SIM卡，我使用了TestDATAScreen服务类，如下所示

public class SIMTestReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    if ("android.intent.action.BOOT_COMPLETED".equals(intent.getAction()))  {
        Intent CompareSimServiceIntent = new Intent(context,TestDATAScreen.class);
        context.startService(CompareSimServiceIntent);
    }

}

public class TestDATAScreen extends Service {

String FILENAME = "old_file.txt";

@Override
public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public int onStartCommand(Intent intent, int flags, final int startId) {
    Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();
    TelephonyManager tManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
    try {
        FileInputStream fis = openFileInput(FILENAME);
        InputStreamReader in = new InputStreamReader(fis);
        BufferedReader br = new BufferedReader(in);
        String data = br.readLine();
        System.out.println("---Data Read From File is:" + data);
        String newsiminfo = tManager.getLine1Number();
        System.out.println("---New SIM no is:" + newsiminfo);
        if (data.equals(tManager.getLine1Number())) {
            System.out.println("------Old sim Present:");

            Toast.makeText(this, "Old SIM", Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(this, "New SIM", Toast.LENGTH_LONG).show();
            SmsManager smsMngr = SmsManager.getDefault();
            String destinationaddress = "8689908070";
            String scAddress = null;
            String text = "New Sim Is Inserted In Your Device";
            PendingIntent sentIntent = null;
            PendingIntent deliveryIntent = null;
            smsMngr.sendTextMessage(destinationaddress, scAddress, text,
                    sentIntent, deliveryIntent);
            System.out.println("-----SMS Send");
        }

    } catch (Exception e) {

    }
    return startId;

}

---

首先保存sim卡，然后将保存的sim卡与当前sim卡进行比较。您从未加载旧sim卡的序列号。

我找到了解决方案。使用

tManager.getSimSerialNumber（）实际比较序列号解决我的问题。由于电话号码不是物理存储在所有SIM卡上，也不是从网络广播到手机，因此
tManager.getLine1Number（）
无法保证解决此问题
 对。但是你用新的序列号覆盖旧的序列号。在加载旧序列号之前。加载旧序列后应保存新序列。如何检测sim详细信息。我可以检测sim详细信息。@Rakshi使用此TelephonyManager tManager=（TelephonyManager）this.getSystemService（Context.TELEPHONY_SERVICE）；字符串serial=tManager.getLine1Number（）；我也在使用上述许可。要检测sim卡更改，您必须将以前的值存储在某个位置，并且每次检查其是否相同或更改时，您是这样做的吗