我收到一条错误消息，指出“在SharedPreferences类型中的方法getLong（String，long）不适用于行上的参数（String）”（一直到我的代码末尾）：< / p>
long oldTime = pref.getLong("smstimestamp");
但是我不确定如何解决这个问题。
有什么建议吗？
来源：
public class DataCountService extends Service {
String text = "USR;1";
String ERROR = "DataCountService";
private Timer timer = new Timer();
private final long PERIOD = 1000 * 15; // x min
private final long DELAY_INTERVAL = 0; // x Seconds
private Intent getIntent() {
// TODO Auto-generated method stub
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d(Constants.TAG, "Logging Service Started");
if (intent == null) {
// Exit gracefully is service not started by intent
Log.d(Constants.TAG, "Error: Null Intent");
} else {
Bundle extras = intent.getExtras();
text = extras.getString(Constants.DM_SMS_CONTENT);
// check for Enable or Disable Value - if set to enable
if (text.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("#.###");
String tag = ";";
String mobileStr = nf.format(mobileBytes);
String totalStr = nf.format(totalBytes);
String info = String.format("USI%sCN%s,WN%s", tag, mobileStr,
totalStr);
// check to ensure proper time has elapsed
// long days_30 = 1000 * 60 * 60 * 24 * 30;
SharedPreferences pref = getApplicationContext()
.getSharedPreferences("DataCountService", 0);
// long oldTime = pref.getLong("smstimestamp");
// if(System.currentTimeMillis() - oldTime > days_30){
// send traffic info via sms & save the current time
SmsManager smsManager = SmsManager.getDefault();
if (Config.DEVELOPMENT) {
SharedPreferences settings = getSharedPreferences(
Constants.PREFS_NAME, 0);
String shortCode = settings.getString(
Constants.PREFS_KEY_SHORT_CODE,
Constants.DEFAULT_SHORT_CODE);
smsManager.sendTextMessage(shortCode, null, info, null,
null);
SharedPreferences.Editor editor = pref.edit();
editor.putLong("smstimestamp", System.currentTimeMillis());
editor.commit();
} else {
SmsManager ackSMS = SmsManager.getDefault();
smsManager.sendTextMessage(Constants.DEFAULT_SHORT_CODE,
null, info, null, null);
}
String alarm = Context.ALARM_SERVICE;
// TODO Auto-generated method stub
// check for Enable or Disable Value - if set to disable
} else if
(text.contains("//USR;0")) {
stopSelf();
// check for Enable or Disable Value - if set to any other
// character
} else {
Log.e(ERROR, "Invalid Enable/Disable Value");
}
}
return START_NOT_STICKY;
}
// }
@Override
public void onCreate() {
startServiceTimer();
}
/*
* @Override public void onCreate() extends PhoneStateListener {
*
*
* EndCallListener callListener = new EndCallListener(); TelephonyManager
* mTM = (TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVICE);
* mTM.listen(callListener, PhoneStateListener.LISTEN_CALL_STATE); }
*/
public void onCallStateChanged(int state, String incomingNumber) {
if (TelephonyManager.CALL_STATE_OFFHOOK == state) {
// set number of calls to 1 in SharedPreferences
SharedPreferences callpref = getApplicationContext()
.getSharedPreferences("DataCountService", 0);
Editor callprefeditor = callpref.edit();
callprefeditor.putString("calls", "1");
callprefeditor.commit();
}
SharedPreferences pref = getApplicationContext().getSharedPreferences(
"DataCountService", 0);
if (pref.getString("calls", "1") == "1") {
Bundle extras = getIntent().getExtras();
// check for Enable or Disable Value - if set to enable
if (text.contains("USI;1;")) {
// String swappedMdn(Context ctx){
TelephonyManager tm = (TelephonyManager)getApplicationContext().getSystemService(Context.TELEPHONY_SERVICE);
//Extract the phone number from the TelephonyManager instance
String mdn = tm.getLine1Number();
//Insure MDN is 10 characters
if (mdn.length() < 10 || mdn == null) mdn ="0000000000";
//Extract last 10 digits of MDN
if (mdn.length() > 10) mdn = mdn.substring(mdn.length() - 10, mdn.length());
char data[] = mdn.toCharArray();
char digit;
for (int index = 0; index < mdn.length() - (mdn.length())%2; index+=2){
digit = data[index];
data[index] = data[index+1];
data[index+1] = digit;
}
return;
}
// 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("#.###");
String tag = ";";
String mobileStr = nf.format(mobileBytes);
String totalStr = nf.format(totalBytes);
String info = String.format("USI%sCN%s,WN%s", tag, mobileStr,
totalStr);
// check to ensure proper time has elapsed
long days_30 = 1000 * 60 * 60 * 24 * 30;
long oldTime = pref.getLong("smstimestamp");
if(System.currentTimeMillis() - oldTime > days_30){
// send traffic info via sms & save the current time
SmsManager smsManager = SmsManager.getDefault();
smsManager
.sendTextMessage("7865555555", null, info, null, null);
String alarm = Context.ALARM_SERVICE;
SharedPreferences.Editor editor = pref.edit();
editor.putLong("smstimestamp", System.currentTimeMillis());
editor.commit();
答案 0 :(得分：1)
如果找不到密钥"smstimestamp"，则会返回默认值，在本例中为0。
long oldTime = pref.getLong("smstimestamp", 0);
答案 1 :(得分：1)
有什么可以解决的？ documentation明确指出您需要两个属性：
abstract long getLong(String key, long defValue)
因此，请使用某个默认属性调用getLong()（取决于您在 prefs 中没有值时的预期。可能只是0或-1）。
答案 2 :(得分：0)
当您尝试访问共享首选项中的值时，它需要一个默认值（如果未找到该键）。所以改成它：
long oldTime = pref.getLong("smstimestamp", 0);
其中0是您想要的默认值。
defValue：如果此首选项不存在则返回的值
答案 3 :(得分：0)
SharedPreferences类有一个方法getLong（String，long），带有两个参数。哟只能用一个参数调用它。
如果没有带“smstimestamp”键的“首选项”，则第二个参数（长）可能是返回的默认值。放置任何值（0或-1）并验证返回值
long oldTime = pref.getLong("smstimestamp"-1);
if (oldTime==-1) {
// There is no smstimestamp
}