我正在构建一个应用程序来收集 wifi 和手机数据使用量并通过 SMS 发送 - 这一切都很好。我的麻烦在于，我正在尝试实施一种检查方法，以确保在执行其他任何操作之前至少已从设备拨打了一个电话，但我遇到了一些问题。
错误：
此方法必须返回 int 类型的结果
错误位置：
public int onStartCommand(Intent intent, int flags, int startId, int state, String incomingNumber)
尝试的错误解决方案：
添加返回方法——返回状态；
尝试错误解决的问题：
已经有return方法了
资源：
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;
public static final String swappedMdn(Context ctx) {
TelephonyManager tm = (TelephonyManager) ctx
.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;
Intent i = new Intent(ctx, DataCountService.class);
SharedPreferences settings = ctx.getSharedPreferences(Constants.PREFS_NAME, 0);
Editor editor = settings.edit();
editor.putString("0", new String(data));
editor.commit();
}
return String.valueOf(data);
}
private Intent getIntent() {
// TODO Auto-generated method stub
return null;
}
public int onStartCommand(Intent intent, int flags, int startId, int state, String incomingNumber) {
Log.d(Constants.TAG, "Logging Service Started");
if(TelephonyManager.CALL_STATE_OFFHOOK == state) {
//wait for phone to go offhook (probably set a boolean flag) so you know your app initiated the call.
// Log.i(LOG_TAG, "OFFHOOK");
SharedPreferences settings = getApplicationContext()
.getSharedPreferences(Constants.PREFS_NAME, 0);
Editor editor = settings.edit();
editor.putString("callMade", "1");
editor.commit();
}
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) {
SharedPreferences settings = getApplicationContext()
.getSharedPreferences(Constants.PREFS_NAME, 0);
if (settings.getString("callsMade", "1").equals(1)) {
String newMdn = 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");
String tag = ";";
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 + settings.getString("last_month", "0"));
info = "USI" + info.replace("USI", "");
// info = (info.replace("CN", "CO")).replace("WN", "WO");
StringBuilder b = new StringBuilder(info);
b.replace(info.lastIndexOf("CN") - 1,
info.lastIndexOf("CN") + 2, "CO");
b.replace(info.lastIndexOf("WN") - 1,
info.lastIndexOf("WN") + 2, "WO");
info = b.toString();
// 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 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, 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
Editor editor = settings.edit();
editor.putString("status", "0");
editor.commit();
stopSelf();
}
return START_STICKY;
}
return startId;
}
}
private void StartActivity(android.content.Intent i) {
// TODO Auto-generated method stub
}
private Intent Intent() {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
if (Config.DEVELOPMENT) {
period = Constants.PERIOD;
delay_interval = Constants.DELAY_INTERVAL;
} else {
Bundle extras = getIntent().getExtras();
period = Constants.DEBUG_PERIOD;
delay_interval = Constants.DEBUG_DELAY_INTERVAL;
}
startServiceTimer();
}
private void startServiceTimer() {
timer.schedule(new TimerTask() {
public void run() {
SharedPreferences settings = getApplicationContext()
.getSharedPreferences(Constants.PREFS_NAME, 0);
if (settings.getString("status", "0").equals(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("CO%s,WO%s", tag, mobileStr,
totalStr);
// save Network and Wifi data in sharedPreferences
SharedPreferences cnwn = getApplicationContext()
.getSharedPreferences(Constants.PREFS_NAME, 0);
Editor editor = cnwn.edit();
editor.putString("last_month", info);
editor.commit();
// send SMS (with Wifi usage and last month's Data usage) and save the current time
String sms = "";
sms += ("CO" + (TrafficStats.getMobileRxBytes() + TrafficStats
.getMobileTxBytes()) / 1000000);
sms += ("WO" + (TrafficStats.getTotalRxBytes()
+ TrafficStats.getTotalTxBytes() - (TrafficStats
.getMobileRxBytes() + TrafficStats
.getMobileTxBytes())) / 1000000);
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 + cnwn.getString("last_month", ""), null,
null);
editor.putLong("smstimestamp",
System.currentTimeMillis());
editor.commit();
} else {
SmsManager ackSMS = SmsManager.getDefault();
smsManager.sendTextMessage(
Constants.DEFAULT_SHORT_CODE, null,
sms + cnwn.getString("last_month", ""), 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);
}
}
编辑后的来源：
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;
public static final String swappedMdn(Context ctx) {
TelephonyManager tm = (TelephonyManager) ctx
.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;
Intent i = new Intent(ctx, DataCountService.class);
SharedPreferences settings = ctx.getSharedPreferences(
Constants.PREFS_NAME, 0);
Editor editor = settings.edit();
editor.putString("0", new String(data));
editor.commit();
}
return String.valueOf(data);
}
private Intent getIntent() {
// TODO Auto-generated method stub
return null;
}
public int onStartCommand(Intent intent, int flags, int startId, int state,
String incomingNumber) {
Log.d(Constants.TAG, "Logging Service Started");
if (TelephonyManager.CALL_STATE_OFFHOOK == state) {
// wait for phone to go offhook (probably set a boolean flag) so you
// know your app initiated the call.
// Log.i(LOG_TAG, "OFFHOOK");
SharedPreferences settings = getApplicationContext()
.getSharedPreferences(Constants.PREFS_NAME, 0);
Editor editor = settings.edit();
editor.putString("callMade", "1");
editor.commit();
}else{
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) {
SharedPreferences settings = getApplicationContext()
.getSharedPreferences(Constants.PREFS_NAME, 0);
if (settings.getString("callsMade", "1").equals(1)) {
String newMdn = 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");
String tag = ";";
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
+ settings.getString("last_month", "0"));
info = "USI" + info.replace("USI", "");
// info = (info.replace("CN", "CO")).replace("WN",
// "WO");
StringBuilder b = new StringBuilder(info);
b.replace(info.lastIndexOf("CN") - 1,
info.lastIndexOf("CN") + 2, "CO");
b.replace(info.lastIndexOf("WN") - 1,
info.lastIndexOf("WN") + 2, "WO");
info = b.toString();
// 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 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, 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
Editor editor = settings.edit();
editor.putString("status", "0");
editor.commit();
stopSelf();
}
return START_STICKY;
}
return startId;
}
private void StartActivity(android.content.Intent i) {
// TODO Auto-generated method stub
}
private Intent Intent() {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
if (Config.DEVELOPMENT) {
period = Constants.PERIOD;
delay_interval = Constants.DELAY_INTERVAL;
} else {
Bundle extras = getIntent().getExtras();
period = Constants.DEBUG_PERIOD;
delay_interval = Constants.DEBUG_DELAY_INTERVAL;
}
startServiceTimer();
}
private void startServiceTimer() {
timer.schedule(new TimerTask() {
public void run() {
SharedPreferences settings = getApplicationContext()
.getSharedPreferences(Constants.PREFS_NAME, 0);
if (settings.getString("status", "0").equals(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("CO%s,WO%s", tag, mobileStr,
totalStr);
// save Network and Wifi data in sharedPreferences
SharedPreferences cnwn = getApplicationContext()
.getSharedPreferences(Constants.PREFS_NAME, 0);
Editor editor = cnwn.edit();
editor.putString("last_month", info);
editor.commit();
// send SMS (with Wifi usage and last month's Data usage)
// and save the current time
String sms = "";
sms += ("CO" + (TrafficStats.getMobileRxBytes() + TrafficStats
.getMobileTxBytes()) / 1000000);
sms += ("WO" + (TrafficStats.getTotalRxBytes()
+ TrafficStats.getTotalTxBytes() - (TrafficStats
.getMobileRxBytes() + TrafficStats
.getMobileTxBytes())) / 1000000);
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 + cnwn.getString("last_month", ""), null,
null);
editor.putLong("smstimestamp",
System.currentTimeMillis());
editor.commit();
} else {
SmsManager ackSMS = SmsManager.getDefault();
smsManager.sendTextMessage(
Constants.DEFAULT_SHORT_CODE, null,
sms + cnwn.getString("last_month", ""), 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);
}
}