我是 Android 开发的新手，遇到了一个奇怪的问题：我需要构建一个应用程序来查看我的所有通话、消息和移动互联网流量，以跟踪消费情况。我为电话和消息设置了一个观察者，直到现在一切都完美无缺。我做了一个类来检索关于我的互联网流量的数据（不是观察者），我需要定期安排这个类，所以我这样做了：我在清单中注册了一个接收器，接收器类如下：
public class ServiceStarter extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Log.i("ServiceStarter.onReceive", "DetenctionService non attivo, lo lancio...");
context.startService(new Intent(context, DetectionSevice.class));
}
}
现在导致问题的类DetectionService：
public class DetectionSevice extends Service {
@SuppressWarnings("unused")
private static SQLiteDatabase dbInstance;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
ContentResolver resolver = this.getApplicationContext().getContentResolver();
TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
dbInstance = HabbleDB.getDBInstance(getApplicationContext());
// The calls observer
resolver.registerContentObserver(android.provider.CallLog.Calls.CONTENT_URI, true, new CallLogObserver(getContentResolver(), tm, getApplicationContext()));
Log.i("DetectionService.onCreate", "Observer chiamate attivato");
// The messages observer
resolver.registerContentObserver(MessageLogObserver.uriConversation, true, new MessageLogObserver(resolver, tm, getApplicationContext()));
Log.i("DetectionService.onCreate", "Observer messaggi attivato");
//data intent for scheduling
PendingIntent pi;
AlarmManager am = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
long nextDate;
Intent saveData = new Intent(this, DataSaver.class);
pi = PendingIntent.getService(this, 1234567, saveData, PendingIntent.FLAG_CANCEL_CURRENT);
nextDate = System.currentTimeMillis() + DataSaver.DELAY;
am.setRepeating(AlarmManager.RTC_WAKEUP, nextDate, DataSaver.DELAY, pi);
Log.i("DetectionService.onCreate", "Scheduler per la raccolta dati attivato");
SharedPreferenceManager.setLongPreference(this, SharedPreferenceManager.NEXT_DATA_SAVE, nextDate);
//Sender data intent for scheduling
Intent intent = new Intent(this, SelectAndSend.class);
pi = PendingIntent.getService(this, 1234578, intent, PendingIntent.FLAG_CANCEL_CURRENT);
nextDate = System.currentTimeMillis()+SelectAndSend.DELAY;
am.setRepeating(AlarmManager.RTC_WAKEUP, nextDate, SelectAndSend.DELAY, pi);
Log.i("DetectionService.onCreate", "Scheduler per l'invio dati registrato");
SharedPreferenceManager.setLongPreference(this, SharedPreferenceManager.NEXT_SCHEDULE, nextDate);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent, flags, startId);
return Service.START_STICKY;
}
}
最后应该由调度程序启动的类：
public class DataSaver extends IntentService {
private static final boolean tsSupported = (TrafficStats.getTotalRxBytes() == TrafficStats.UNSUPPORTED) ? false : true;
private static final Format FORMATTER = new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
private TelephonyManager manager;
private Context context = getApplicationContext();
private long totalApps, total3g;
private SparseArray<String> apps = new SparseArray<String>();
private PowerManager.WakeLock wl;
private Handler mHandler = new Handler(Looper.getMainLooper());
public static final int DELAY = 1 * 60 * 1000;
public DataSaver() {
super("DataSaverService");
setIntentRedelivery(true);
}
@SuppressWarnings("deprecation")
@Override
public void onCreate() {
super.onCreate();
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "DataSaverService");
wl.acquire();
initializeMinDataID();
Log.i("DataSaver", "DataSaver created");
}
@Override
protected void onHandleIntent(Intent intent) {
run();
long nextDate = System.currentTimeMillis() + DataSaver.DELAY;
SharedPreferenceManager.setLongPreference(this, SharedPreferenceManager.NEXT_DATA_SAVE, nextDate);
wl.release();
}
public void run() {
mHandler.post(new Runnable() {
public void run() {
int i, uid;
long base3g, baseApps;
//Recupero gli UID solo delle app che effettivamente hanno generato traffico
File dir = new File("/proc/uid_stat/");
String[] children = dir.list();
if (children != null) {
PackageManager pm = context.getPackageManager();
for (i = 0; i < children.length; i++) {
uid = Integer.parseInt(children[i]);
if ((uid >= 0 && uid < 2000) || (uid >= 10000)) {
apps.put(uid, pm.getNameForUid(uid));
}
}
}
baseApps = SharedPreferenceManager.getLongPreference(context, SharedPreferenceManager.LAST_APPS_DATA);
base3g = SharedPreferenceManager.getLongPreference(context, SharedPreferenceManager.LAST_3G_DATA);
totalApps = 0;
total3g = 0;
//Se TrafficStats è supportato
if(tsSupported) {
total3g += TrafficStats.getMobileRxBytes() + TrafficStats.getMobileTxBytes();
if(total3g < base3g) {
Log.e("DataSaver.run", "total3g è minore di base3g!");
SharedPreferenceManager.setLongPreference(context, SharedPreferenceManager.LAST_3G_DATA, total3g);
return;
}
if(apps.size() > 0) {
for(i = 0; i < apps.size(); i++) {
totalApps += TrafficStats.getUidRxBytes(apps.keyAt(i)) + TrafficStats.getUidTxBytes(apps.keyAt(i));
}
}
if(totalApps < baseApps) {
Log.e("DataLogObserver.saveDataInformation", "totalApps è minore di baseApps!");
SharedPreferenceManager.setLongPreference(context, SharedPreferenceManager.LAST_APPS_DATA, totalApps);
return;
}
} else {//Se TrafficStats non è supportato
Toast toast = Toast.makeText(context, "Impossibile recuperare alcuni dati. Device non supportato.", Toast.LENGTH_SHORT);
toast.show();
Log.w("DataSaver.initializeMinDataID", "Il device non supporta TrafficStats!");
return;
}
Date savedTime = new Date();
DataBean bean = new DataBean();
String mcc = manager.getNetworkOperator().substring(0, 3);
String mnc = manager.getNetworkOperator().substring(3);
AppDataBean appBean;
bean.serial = manager.getSubscriberId();
bean.mcc = mcc;
bean.mnc = mnc;
bean.total3gAmount = total3g - base3g;
bean.from = FORMATTER.format(savedTime);
if(apps.size() > 0) {
for(i = 0; i < apps.size(); i++) {
appBean = new AppDataBean();
appBean.uid = apps.keyAt(i);
appBean.name = apps.valueAt(i);
appBean.appAmount = TrafficStats.getUidRxBytes(appBean.uid) + TrafficStats.getUidTxBytes(appBean.uid);
appBean.from = FORMATTER.format(savedTime);
if(!HabbleDB.insertAppData(appBean)) Log.e("DataLogObserver.saveDataInformation", "Errore nell'inserimento dei dati per l'applicazione " + apps.valueAt(i));
}
}
if(HabbleDB.insertData(bean)) //se l'inserimento è andato a buon fine, aggiorno anche LAST_3G_DATA
SharedPreferenceManager.setLongPreference(context, SharedPreferenceManager.LAST_3G_DATA, total3g);
else Log.e("DataLogObserver.saveDataInformation", "Errore nell'inserimento dei dati 3g");
}
});
}
private void initializeMinDataID() {
totalApps = 0;
total3g = 0;
//Se TrafficStats è supportato
if(tsSupported) {
if(apps.size() > 0) {
for(int i = 0; i < apps.size(); i++) {
totalApps += TrafficStats.getUidRxBytes(apps.keyAt(i)) + TrafficStats.getUidTxBytes(apps.keyAt(i));
}
}
total3g += TrafficStats.getMobileRxBytes() + TrafficStats.getMobileTxBytes();
} else {//Se TrafficStats non è supportato
Toast toast = Toast.makeText(context, "Impossibile recuperare alcuni dati. Device non supportato.", Toast.LENGTH_SHORT);
toast.show();
Log.w("DataSaver.initializeMinDataID", "Il device non supporta TrafficStats!");
return;
}
long min = SharedPreferenceManager.getLongPreference(context, SharedPreferenceManager.LAST_3G_DATA);
if(min == 0 || min > total3g) SharedPreferenceManager.setLongPreference(context, SharedPreferenceManager.LAST_3G_DATA, total3g);
min = SharedPreferenceManager.getLongPreference(context, SharedPreferenceManager.LAST_APPS_DATA);
if(min == 0 || min > totalApps) SharedPreferenceManager.setLongPreference(context, SharedPreferenceManager.LAST_APPS_DATA, totalApps);
}
}
当我启动应用程序时，两个观察者工作正常，但似乎只安排了数据发送器类 (SelectAndSend)，DataSaver 类不会从应用程序启动开始记录任何内容，并且似乎它在应用程序中不存在.
有人可以帮我吗？
PS：对不起我的英语不好，我希望清楚。
[编辑 2013-05-27]：我尝试以这种方式修改 DetectionService.onCreate()：
...
PendingIntent pi, pi2;
AlarmManager am = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
AlarmManager am2 = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
long nextDate;
ComponentName cn = new ComponentName(this, DataSaver.class);
Intent saveData = new Intent().setClass(this, DataSaver.class).setComponent(cn);
pi = PendingIntent.getService(this, 1234567, saveData, PendingIntent.FLAG_UPDATE_CURRENT);
nextDate = System.currentTimeMillis() + DataSaver.DELAY;
am.setInexactRepeating(AlarmManager.RTC_WAKEUP, nextDate, DataSaver.DELAY, pi);
Log.i("DetectionService.onCreate", "Scheduler per la raccolta dati attivato");
SharedPreferenceManager.setLongPreference(this, SharedPreferenceManager.NEXT_DATA_SAVE, nextDate);
//aggiungo l'intent per l'invio dei dati all'alarm manager
Intent intent = new Intent(this, SelectAndSend.class);
pi2 = PendingIntent.getService(this, 1234578, intent, PendingIntent.FLAG_CANCEL_CURRENT);
nextDate = System.currentTimeMillis() + SelectAndSend.DELAY;
am2.setRepeating(AlarmManager.RTC_WAKEUP, nextDate, SelectAndSend.DELAY, pi2);
Log.i("DetectionService.onCreate", "Scheduler per l'invio dati registrato");
SharedPreferenceManager.setLongPreference(this, SharedPreferenceManager.NEXT_SCHEDULE, nextDate);
如您所见，我在 Intent 中强制使用 ComponentName 对象和指定的类，但我还没有响应。我真的需要帮助，我要疯了！！！