我开发了一个应用程序，每1分钟向服务器发送一次数据。它每隔几分钟检查Internet连接，当互联网可用时，应用程序将数据发送到服务器，并在收到成功标记后删除发送数据的表行。 但问题是它在到达成功标记之前发送了一个JSON Mutliple时间来删除表行 示例：如果我发送json，如 {＆＃39; amt＆＃39;：100} ，那么服务器会收到 {＆＃39; amt＆＃39 ;：100} {＆＃39; amt＆＃39;：100} {＆＃39; amt＆＃39;：100} {＆＃39; amt＆＃39;：100} ...... 多次如果服务器执行特定标签的添加操作，比如amt那么它添加所有标签值比tag的实际值多5倍。如果amt是100则服务器接收500
AlarmReceiver.java
public class AlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Intent background = new Intent(context, BackgroundService.class);
context.startService(background);
}
}
BackgroundService.java
public class BackgroundService extends Service {
int debug = 0;
private boolean isRunning;
private Context context;
private Thread backgroundThread;
Helper hp = new Helper(BackgroundService.this);
private ArrayList<NameValuePair> params;
Connect cn = new Connect();
DatabaseConnector dbConnector = new DatabaseConnector(BackgroundService.this);
JSONObject finalObj;
JSONArray resultSet;
AQuery aq = new AQuery(this);
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
this.context = this;
this.isRunning = false;
this.backgroundThread = new Thread(myTask);
}
private Runnable myTask = new Runnable() {
public void run() {
// Do something here
internet();
stopSelf();
}
};
@Override
public void onDestroy() {
this.isRunning = false;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (!this.isRunning) {
this.isRunning = true;
this.backgroundThread.start();
}
return START_STICKY;
}
private void internet() {
finalObj = null;
resultSet = null;
if (hp.isonline() == true) {
Log.e("dcn", "net connect");
if (!dbConnector.isPayTableEmplty()) {
// Log.e("syncData", getPaymentJSON());
hp.generateTxtOnSD(getPaymentJSON());
Map<String, Object> params = new HashMap<>();
params.put("bulk_pay_json", getPaymentJSON());
String url = Urls.sync_url;
aq.ajax(url, params, JSONObject.class, this, "jsonCallBack");
Log.e("start", "start");
} else {
Log.e("syncData", "table is empty");
}
} else {
Log.e("dcn", "net not connect");
}
}
public void jsonCallBack(String url, JSONObject json, AjaxStatus status) {
if (json != null) {
if (debug == 1 || Urls.debug == true) {
Log.e("result", json.toString());
Log.e("url", url);
Log.e("status", String.valueOf(status.toString()));
}
try {
JSONObject jsonObject = new JSONObject(json.toString());
if ("true".equals(jsonObject.getString("json_integrity"))) {
try {
String del_pay = dbConnector.deletePayMentTable();
hp.generateTxtOnSD(del_pay);
Log.d("result", "upload successfully");
showNotification();
} catch (Exception e) {
}
} else {
Log.e("result", "error occured");
}
} catch (Exception e) {
Log.d("Ex", e.getLocalizedMessage());
}
} else {
new Helper(this).showToast(Urls.errors[1]);
}
}
private String getPaymentJSON() {
//get opid from SharedPrefrences
ArrayList<String> opLn = hp.getOpId(BackgroundService.this);
ArrayList<String> op = hp.getSaveOpInfo(BackgroundService.this);
String opid;
if (Integer.valueOf(opLn.get(0)) != 0) {
opid = opLn.get(0);
} else {
opid = op.get(0);
}
// open DB for operation
dbConnector.open();
// get customer Table columns
Cursor cursor = dbConnector.ListAllPayData();
cursor.moveToFirst();
while (cursor.isAfterLast() == false) {
int totalColumn = cursor.getColumnCount();
JSONObject rowObject = new JSONObject();
for (int i = 0; i < totalColumn; i++) {
if (cursor.getColumnName(i) != null) {
try {
rowObject.put("conNo", cursor.getString(cursor.getColumnIndex(dbConnector.CONNO)));
rowObject.put("amount", cursor.getString(cursor.getColumnIndex(dbConnector.PAIDAMT)));
rowObject.put("contact", cursor.getString(cursor.getColumnIndex(dbConnector.CONTACT)));
rowObject.put("lineman", cursor.getString(cursor.getColumnIndex(dbConnector.LNID)));
rowObject.put("time", cursor.getString(cursor.getColumnIndex(dbConnector.TIME)));
rowObject.put("discount", cursor.getString(cursor.getColumnIndex(dbConnector.DISCOUNT)));
rowObject.put("rcpt", "");
rowObject.put("remark", cursor.getString(cursor.getColumnIndex(dbConnector.REMARK)));
} catch (Exception e) {
Log.d("TAG_NAME", e.getMessage());
}
}
}
resultSet = new JSONArray();
resultSet.put(rowObject);
cursor.moveToNext();
}
try {
finalObj = new JSONObject();
finalObj.put("error", "false");
finalObj.put("opid", opid);
finalObj.put("data", resultSet);
} catch (JSONException e) {
e.printStackTrace();
}
dbConnector.close();
return finalObj.toString();
}
}
呼叫广播接收器
private void BrodcastReceiverOn() {
this.context = this;
Intent alarm = new Intent(this.context, AlarmReceiver.class);
boolean alarmRunning = (PendingIntent.getBroadcast(this.context, 0, alarm, PendingIntent.FLAG_NO_CREATE) != null);
if (alarmRunning == false) {
pendingIntent = PendingIntent.getBroadcast(this.context, 0, alarm, 0);
alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime(), 3000, pendingIntent);
}
}
我使用AQuery进行发布和接收，因为不推荐使用http客户端
答案 0 :(得分：0)
我认为这是因为你的IntervalMillis：
alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime(), 3000, pendingIntent);
它以3秒为单位重复，单位为毫秒。
使用此
final long INTERVAL = 1 * 60 * 1000; // 1 minute
alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime(), INTERVAL, pendingIntent);
希望这有帮助。