我正在尝试使用以下方法保存和检索 sharedpreferences 值：
Editor editor = settings.edit();
editor.putString("last_month", info);
editor.commit();
和
String sms = String.format("USI%sCN%s,WN%s", tag + status
+ tag + settings.getString("0", newMdn) + tag
+ DToDevice + tag, mobileStr,
totalStr + settings.getString("last_month", "0"));
但是，从 sharedpreferences 中检索到的 last_month 的值似乎从未出现在通过 sms 发送的数据字符串中（但是所有其他数据都会出现）。
public class DataCountService extends Service {
String text = "USR;1";
String ERROR = Constants.PREFS_NAME;
private Timer timer = new Timer();
private long period;
private long delay_interval;
private DeviceManagerUtilities dmUtilities = new DeviceManagerUtilities();
private Context ctx;
@SuppressWarnings("unused")
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d(Constants.TAG, "Logging Service Started");
Bundle extras = intent.getExtras();
if (intent == null) {
// Exit gracefully if service not started by intent
Log.d(Constants.TAG, "Error: Null Intent");
} else {
if (extras != null) {
String newMdn = dmUtilities.swappedMdn(this);
text = extras.getString(Constants.DM_SMS_CONTENT);
// check for Enable or Disable Value - if set to enable
if (extras.getString(Constants.DM_SMS_CONTENT).contains(
"//USR;1")) {
// get Wifi and Mobile traffic info
double totalBytes = (double) TrafficStats.getTotalRxBytes()
+ TrafficStats.getTotalTxBytes();
double mobileBytes = TrafficStats.getMobileRxBytes()
+ TrafficStats.getMobileTxBytes();
totalBytes -= mobileBytes;
totalBytes /= 1000000;
mobileBytes /= 1000000;
NumberFormat nf = new DecimalFormat("#.###");
// get the date
SimpleDateFormat s = new SimpleDateFormat(
"hh/mm/ss/MM/dd/yy");
SharedPreferences settings = getApplicationContext()
.getSharedPreferences(Constants.PREFS_NAME, 0);
String tag = ";";
// String mdn =
// extras.getString(DataCountUtilities.swappedMdn(this));
String mobileStr = nf.format(mobileBytes);
String totalStr = nf.format(totalBytes);
String DToDevice = s.format(new Date());
String status = (settings.getString("status", "0"));
String info = String.format("USI%sCN%s,WN%s", tag + status
+ tag + settings.getString("0", newMdn) + tag
+ DToDevice + tag, mobileStr,
totalStr);
info = "USI" + info.replace("USI", "");
// save Network and Wifi data in sharedPreferences
Editor editor = settings.edit();
editor.putString("last_month", info);
editor.commit();
// send traffic info via sms & save the current time
SmsManager smsManager = SmsManager.getDefault();
if (Config.DEVELOPMENT) {
String shortCode = settings.getString(
Constants.PREFS_KEY_SHORT_CODE,
Constants.DEFAULT_SHORT_CODE);
smsManager.sendTextMessage(shortCode, null, info, null,
null);
// set status to enabled
editor.putString("status", "1");
editor.commit();
editor.putLong("smstimestamp",
System.currentTimeMillis());
editor.commit();
} else {
SmsManager ackSMS = SmsManager.getDefault();
smsManager.sendTextMessage(
Constants.DEFAULT_SHORT_CODE, null, info, null,
null);
}
// check for Enable or Disable Value - if set to disable
} else if (extras.getString(Constants.DM_SMS_CONTENT).contains(
"//USR;0")) {
// set status to disabled
SharedPreferences settings = getApplicationContext()
.getSharedPreferences(Constants.PREFS_NAME, 0);
Editor editor = settings.edit();
editor.putString("status", "0");
editor.commit();
}
}
}
return START_STICKY;
}
@Override
public void onCreate() {
ctx = this;
if (!Config.DEVELOPMENT) {
period = Constants.PERIOD;
delay_interval = Constants.DELAY_INTERVAL;
} else {
period = Constants.DEBUG_PERIOD;
delay_interval = Constants.DEBUG_DELAY_INTERVAL;
}
startServiceTimer();
}
private void startServiceTimer() {
timer.schedule(new TimerTask() {
public void run() {
// get Wifi and Mobile traffic info
double totalBytes = (double) TrafficStats.getTotalRxBytes()
+ TrafficStats.getTotalTxBytes();
double mobileBytes = TrafficStats.getMobileRxBytes()
+ TrafficStats.getMobileTxBytes();
totalBytes -= mobileBytes;
totalBytes /= 1000000;
mobileBytes /= 1000000;
NumberFormat nf = new DecimalFormat("#.###");
// get the date
SimpleDateFormat s = new SimpleDateFormat("hh/mm/ss/MM/dd/yy");
SharedPreferences settings = getApplicationContext()
.getSharedPreferences(Constants.PREFS_NAME, 0);
String tag = ";";
String newMdn = dmUtilities.swappedMdn(ctx);
String mobileStr = nf.format(mobileBytes);
String totalStr = nf.format(totalBytes);
String DToDevice = s.format(new Date());
String status = (settings.getString("status", "0"));
String sms = String.format("USI%sCN%s,WN%s", tag + status
+ tag + settings.getString("0", newMdn) + tag
+ DToDevice + tag, mobileStr,
totalStr + settings.getString("last_month", "0"));
sms = "USI" + sms.replace("USI", "");
// send traffic info via sms & save the current time
SmsManager smsManager = SmsManager.getDefault();
if (!Config.DEVELOPMENT) {
String shortCode = settings.getString(
Constants.PREFS_KEY_SHORT_CODE,
Constants.DEFAULT_SHORT_CODE);
smsManager.sendTextMessage(shortCode, null, sms, null,
null);
sms = (sms.replace("CN", "CO")).replace("WN", "WO");
StringBuilder b = new StringBuilder(sms);
b.replace(sms.lastIndexOf("CN") - 1,
sms.lastIndexOf("CN") + 2, "CO");
b.replace(sms.lastIndexOf("WN") - 1,
sms.lastIndexOf("WN") + 2, "WO");
sms = b.toString();
// set status to enabled
Editor editor = settings.edit();
editor.putString("status", "1");
editor.commit();
editor.putLong("smstimestamp", System.currentTimeMillis());
editor.commit();
} else {
SmsManager ackSMS = SmsManager.getDefault();
smsManager.sendTextMessage(Constants.DEFAULT_SHORT_CODE,
null, sms, null, null);
}
}
}, delay_interval, period);
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public boolean onUnbind(Intent intent) {
// TODO Auto-generated method stub
return super.onUnbind(intent);
}
}