我有一个服务，它将自动同步大约7,000个数据库记录（从MySQL到SQLite通过一些asmx webservices）和大约100 MB的文件。现在我只有各种测试数据，Aprox 400,000条记录和500 MB数据。
我使用以下代码在MainActivity上启动服务：
SyncFromWeb = new Intent(context, SyncFromWeb.class);
startService(SyncFromWeb);
我的服务每分钟检查一次数据库，看看是否需要同步并下载数据。除此之外，我有两个Intent Services正在运行以从平板电脑同步到中央数据库。一个只调用webservices（调用存储在SQLite表中），另一个调用在应用程序中获取的图像。如果用户拍摄太多照片，我会使用这种方法来减慢数据更新速度。
我的服务看起来像这样（部分）：
public class SyncFromWeb extends Service {
private static final String TAG = "Sync Data From Web";
private boolean isRunning = false;
private List<Pair<String, Object>> ParameterList = new ArrayList<Pair<String, Object>>();
private final String WebServiceURL = Constants.URL_BASE + "Android_DAL.asmx";
private final String NameSpace = "http://tempuri.org/";
private Handler Mainhandler;
@Override
public void onCreate() {
isRunning = true;
Mainhandler = new Handler();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
final Context context = this;
Log.d(TAG, "Starting Sync From Web Service");
new Thread(new Runnable() {
@Override
public void run() {
// boolean Variables declaration
DatabaseHandler db = new DatabaseHandler(context);
SimpleDateFormat DateTimeFormatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm");
String ExecutionDateTime = "";
Date CurrentDateTime = new Date();
Date NextExecutionDateTime = new Date();
while(ExecutionDateTime.trim().equals("")) {
ExecutionDateTime = GetTaskExecutionTime(GetManufacturerSerialNumber());
if(ExecutionDateTime.trim().equals("")) {
try {
Thread.sleep(5000);
}
catch (Exception ex) { Log.d(TAG, "Exception while getting Execution Task Time. Details: " + ex.getMessage()); }
}
}
// Not all the tablets are going to synchronize
isRunning = !ExecutionDateTime.equals("NO SYNC");
while(isRunning) {
try {
CurrentDateTime = new Date();
NextExecutionDateTime = DateTimeFormatter.parse(ExecutionDateTime);
}
catch(Exception ex) {
Log.d(TAG, "");
}
if(CurrentDateTime.compareTo(NextExecutionDateTime) > 0) {
ShowToast("Running scheduled syncronization from Web Database...");
//... Download data routines
if(WorkListDataDone && WorkListStageDataDone && WorkListInspectionPointDataDone && WorkListInspectionResultDataDone && WorkListInspectionResultPictureDataDone && InspectionKitDataDone && ListsDataDone) {
//.. Booleans set to false
SetNextSynchronizationTime(GetManufacturerSerialNumber());
//.. Calculate local next sync time, current sync time plus 24 hours
ShowToast("Today's synchronization finished...");
}
db.close();
}
else {
try {
// If it's not time to execute, check back in one minute
Thread.sleep(1000*60);
}
catch (Exception ex) { Log.d(TAG, "Exception on Thread.Sleep."); }
}
}
}
}).start();
return Service.START_NOT_STICKY;
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public void onDestroy() {
isRunning = false;
Log.d(TAG, "Service Destroyed");
}
private String GetTaskExecutionTime(String TabletSerialNumber) {
String MethodName = "SyncToTablet_Tablet_Get";
String ExecutionDateTime = "NO SYNC";
//.. Retrieve sync date time from Db
return ExecutionDateTime;
}
private void SetNextSynchronizationTime(String TabletSerialNumber) {
String MethodName = "SyncToTablet_Tablet_Update_Sync_Time";
//.. Update next sync date time to db
}
private boolean UpdateListData(DatabaseHandler SQLLiteHandler) {
try {
ShowToast("Updating List data from Web Database...");
//.... Normal processing, no problems
}
catch(Exception ex) {
ShowToast("An error ocurred while synchronizing Lists data from Web Database. Retrying...");
Log.d(TAG, "An Exception occurred on CreateListData. Details: " + ex.getMessage());
return false;
}
return true;
}
private Pair<List<com.MyCompany.systm.qirs.obj.List>, List<com.MyCompany.systm.qirs.obj.List>> GetListsList() throws Exception {
List<com.MyCompany.systm.qirs.obj.List> ReturnToDeleteList = new ArrayList<com.MyCompany.systm.qirs.obj.List>();
List<com.MyCompany.systm.qirs.obj.List> ReturnToInsertList = new ArrayList<com.MyCompany.systm.qirs.obj.List>();
//... Normal processing, no problems
return new Pair<List<com.MyCompany.systm.qirs.obj.List>, List<com.MyCompany.systm.qirs.obj.List>>(ReturnToDeleteList, ReturnToInsertList);
}
// Function to retrieve the various chunks of data from the webservice
private Pair<Boolean, JSONArray> GetWorklistData(String MethodName, String FromDateTime, String TableName, int StartingIndex, int RowQuantity) {
JSONArray returnJSONArray = null;
Boolean succesfullExecution = false;
ParameterList.clear();
ParameterList.add(new Pair<String, Object>("FromDateTime", FromDateTime));
ParameterList.add(new Pair<String, Object>("LimitFrom", StartingIndex));
ParameterList.add(new Pair<String, Object>("Offset", RowQuantity));
SoapSerializationEnvelope SOAPEnvelope;
SOAPEnvelope = CreateSOAPConnection("http://tempuri.org/", WebServiceURL, MethodName, ParameterList);
try {
SoapPrimitive SOAPJson = (SoapPrimitive) SOAPEnvelope.getResponse();
JSONObject jsonRootObject = new JSONObject(SOAPJson.toString());
returnJSONArray = jsonRootObject.optJSONArray(TableName);
succesfullExecution = true;
} catch (Exception ex) {
ShowToast("An error ocurred while retrieving the Worklist data from Web Database. Retrying...");
Log.d(TAG, "An Exception occurred on GetWorklistData. Details: " + ex.getMessage());
}
return new Pair<Boolean, JSONArray>(succesfullExecution, returnJSONArray);
}
private boolean UpdateWorkListData(DatabaseHandler db, String FromDateTime) {
String MethodName = "SyncToTablet_WorklistData";
String TableName = "worklist";
int StartingIndex = 0;
int RowQuantity = 1000;
boolean Succesfull = false;
SQLiteDatabase SQLLiteDb = db.GetSQLiteInstance();
while(true) {
Pair<Boolean, JSONArray> WorklistDataFromWeb = GetWorklistData(MethodName, FromDateTime, TableName, StartingIndex, RowQuantity);
if(WorklistDataFromWeb.first && (WorklistDataFromWeb.second == null || WorklistDataFromWeb.second.length() == 0)) {
Succesfull = true;
break;
}
JSONArray jsonArrayWorklist = WorklistDataFromWeb.second;
try {
ShowToast("Updating Worklist data from Web Database...");
for(int i=0; i < jsonArrayWorklist.length(); i++) {
JSONObject jsonObject = jsonArrayWorklist.getJSONObject(i);
db.DeleteALLWorkList(SQLLiteDb, jsonObject.getString("ID"));
db.AddWorkList(SQLLiteDb, new WorkList(jsonObject.getString("ID"),
jsonObject.getString("TabletSerial"),
jsonObject.getString("SAP_No"),
jsonObject.getString("Serial"),
jsonObject.getString("Unit"),
jsonObject.getString("Model"),
jsonObject.getString("Number"),
jsonObject.getString("Customer_Name"),
jsonObject.getInt("Line_ID"),
jsonObject.getInt("List_ID"))
);
}
StartingIndex += RowQuantity;
}
catch (Exception ex) {
ShowToast("An error ocurred while Synchronizing the Worklist data from Web Database. Retrying...");
Log.d(TAG, "An Exception occurred on UpdateWorkListData. Details: " + ex.getMessage());
break;
}
}
SQLLiteDb.close();
return Succesfull;
}
private boolean UpdateWorkListStageData(DatabaseHandler db, String FromDateTime) {
String MethodName = "SyncToTablet_WorklistStageData";
String TableName = "worklist_stage";
int StartingIndex = 0;
int RowQuantity = 1000;
boolean Succesfull = false;
// Same logic as above method
return Succesfull;
}
private boolean UpdateWorkListInspectionPointData(DatabaseHandler db, String FromDateTime) {
String MethodName = "SyncToTablet_WorklistInspectionPointData";
String TableName = "worklist_inspectionpoint";
int StartingIndex = 0;
int RowQuantity = 500;
boolean Succesfull = false;
// Samle logic as above method. This method has a smaller chunk because there are many columns and it's the biggest table
return Succesfull;
}
private boolean UpdateWorkListInspectionResultData(DatabaseHandler db, String FromDateTime) {
String MethodName = "SyncToTablet_WorklistInspectionResultData";
String TableName = "worklist_inspectionresult";
int StartingIndex = 0;
int RowQuantity = 500;
boolean Succesfull = false;
// Same logic as above method.
return Succesfull;
}
private boolean UpdateWorkListInspectionResultPictureData(DatabaseHandler db, String FromDateTime) {
String MethodName = "SyncToTablet_WorklistInspectionResultPicturesData";
String TableName = "worklist_inspectionresultpictures";
int StartingIndex = 0;
int RowQuantity = 5;
boolean Succesfull = false;
// Same logic as above method. This is a smaller chunk because the images are stored in the database, average size is of 70Kb
return true;
}
private boolean UpdateInspectionKitData(DatabaseHandler db, String FromDateTime) {
//.. Do a bunch of stuff, nested loops, each item of second loop creates a file
CreateInspectionKitFile(jsonObject.getString("Kit_Document").toLowerCase(), jsonObject.getString("Kit_FileName").toLowerCase(), jsonObject.getString("Kit_SAP_No").toLowerCase());
//.. Rest of code
return true;
}
private void CreateInspectionKitFile(String FileName, String ServerFileName, String SubFolder) {
File SDCardPath = Environment.getExternalStorageDirectory();
File InspectionKitFileFolder = new File(SDCardPath + "/QIRS/" + SubFolder + "/");
File InspectionKitFile = new File(SDCardPath + "/QIRS/" + SubFolder + "/" + FileName);
if(!InspectionKitFile.exists()) {
ParameterList.clear();
ParameterList.add(new Pair<String, Object>("FileName", ServerFileName));
SoapSerializationEnvelope SOAPEnvelope;
SOAPEnvelope = CreateSOAPConnection("http://tempuri.org/", WebServiceURL, "InspectionKit_GetFile", ParameterList);
try {
SoapPrimitive SOAPJson = (SoapPrimitive) SOAPEnvelope.getResponse();
byte[] FileData = Base64.decode(SOAPJson.toString(), Base64.DEFAULT);
try {
InspectionKitFileFolder.mkdirs();
FileOutputStream fos = new FileOutputStream(InspectionKitFile);
BufferedOutputStream outputStream = new BufferedOutputStream(fos);
outputStream.write(FileData);
outputStream.close();
fos.close();
try {
Log.d(TAG, "Finalizing File Data for " + ServerFileName + ".");
FileData = null;
}
catch (Throwable tex) {
Log.d(TAG, "Exception while Finalizing File Data Array. Details: " + tex.getMessage());
}
} catch (IOException ex) {
Log.d(TAG, "An Exception ocurred on CreateLocalInspectionKitDetail while Creating the File " + FileName + ". Details: " + ex.getMessage());
}
} catch (Exception e) {
Log.d(TAG, "An Exception ocurred on CreateInspectionKitDetail. Details: " + e.getMessage());
}
}
}
// Retrieve the tablet serial number
private String GetManufacturerSerialNumber() {
String SerialNumber = null;
//.. GEt serial number routine
return SerialNumber;
}
private SoapSerializationEnvelope CreateSOAPConnection(String NameSpace, String WebServiceURL, String MethodName, List<Pair<String, Object>> Parameters) {
//.. SOAP call to webservice
}
private void ListSubstraction(List<?> ItemsToDeleteList, List<?> FromList) {
Collection ResultCollection = FromList;
ResultCollection.removeAll(ItemsToDeleteList);
}
public void ShowToast(final String Message) {
// I was receiving an error about a Looper, this is the only case that I found a reference to Looper, that's why I removed it
// Handler h = new Handler(SyncFromWeb.this.getMainLooper());
Mainhandler.post(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(), Message, Toast.LENGTH_SHORT).show();
}
});
}
该服务运行没有问题，我从2015-09-01开始同步（我的第一天没有太多数据或没有数据）当我到2015-10-02时我的应用程序崩溃了（到这个日期，有很多数据）因为我让它一直运行整夜，它崩溃了，我无法检索任何错误（logcat继续滚动，我不知道我是否可以从日志中检索旧消息），所以我今天再次运行它，执行后大约1小时我收到了这些错误消息：
10-15 09:58:26.320 12045-15369/com.MyCompany.systm.qirs D/Sync Data To Web﹕ Synchronizing data to web database.
10-15 09:58:26.328 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) cannot open file at line 30605 of [00bb9c9ce4]
10-15 09:58:26.328 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) os_unix.c:30605: (24) open(/data/data/com.MyCompany.systm.qirs/databases) -
10-15 09:58:26.335 12045-15370/com.MyCompany.systm.qirs D/Sync Images To Web﹕ Synchronizing images to web database.
10-15 09:58:26.335 12045-15369/com.MyCompany.systm.qirs E/SQLiteLog﹕ (10) Failed to open database file with errno : 24!
10-15 09:58:26.335 12045-15369/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) cannot open file at line 32474 of [00bb9c9ce4]
10-15 09:58:26.335 12045-15369/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) os_unix.c:32474: (24) open(/data/data/com.MyCompany.systm.qirs/databases/QIRS_DataBase) -
10-15 09:58:26.335 12045-15370/com.MyCompany.systm.qirs E/SQLiteLog﹕ (10) Failed to open database file with errno : 24!
10-15 09:58:26.335 12045-15370/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) cannot open file at line 32474 of [00bb9c9ce4]
10-15 09:58:26.335 12045-15370/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) os_unix.c:32474: (24) open(/data/data/com.MyCompany.systm.qirs/databases/QIRS_DataBase) -
10-15 09:58:26.382 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) cannot open file at line 30605 of [00bb9c9ce4]
10-15 09:58:26.382 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) os_unix.c:30605: (24) open(/data/data/com.MyCompany.systm.qirs/databases) -
10-15 09:58:26.414 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) cannot open file at line 30605 of [00bb9c9ce4]
10-15 09:58:26.414 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) os_unix.c:30605: (24) open(/data/data/com.MyCompany.systm.qirs/databases) -
10-15 09:58:26.445 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) cannot open file at line 30605 of [00bb9c9ce4]
10-15 09:58:26.445 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) os_unix.c:30605: (24) open(/data/data/com.MyCompany.systm.qirs/databases) -
10-15 09:58:26.453 12045-15369/com.MyCompany.systm.qirs E/SQLiteDatabase﹕ Failed to open database '/data/data/com.MyCompany.systm.qirs/databases/QIRS_DataBase'.
android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:341)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:238)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:515)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:207)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:178)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:875)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:843)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:696)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:1213)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:236)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:188)
at com.androidhive.androidsqlite.DatabaseHandler.SyncToWebGetItems(DatabaseHandler.java:2693)
at com.MyCompany.systm.qirs.SyncToWeb.onHandleIntent(SyncToWeb.java:57)
at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:176)
at android.os.HandlerThread.run(HandlerThread.java:60)
10-15 09:58:26.460 12045-15370/com.MyCompany.systm.qirs E/SQLiteDatabase﹕ Failed to open database '/data/data/com.MyCompany.systm.qirs/databases/QIRS_DataBase'.
android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:341)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:238)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:515)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:207)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:178)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:875)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:843)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:696)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:1213)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:236)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
at com.androidhive.androidsqlite.DatabaseHandler.getAllWorkList_InspectionResultPicture(DatabaseHandler.java:2512)
at com.MyCompany.systm.qirs.SyncImages.onHandleIntent(SyncImages.java:59)
at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:176)
at android.os.HandlerThread.run(HandlerThread.java:60)
10-15 09:58:26.460 12045-15370/com.MyCompany.systm.qirs W/dalvikvm﹕ threadid=19: thread exiting with uncaught exception (group=0x41589930)
10-15 09:58:26.484 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) cannot open file at line 30605 of [00bb9c9ce4]
10-15 09:58:26.484 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) os_unix.c:30605: (24) open(/data/data/com.MyCompany.systm.qirs/databases) -
10-15 09:58:26.531 12045-15370/com.MyCompany.systm.qirs E/AndroidRuntime﹕ FATAL EXCEPTION: IntentService[SyncImages]
android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:341)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:238)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:515)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:207)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:178)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:875)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:843)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:696)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:1213)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:236)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
at com.androidhive.androidsqlite.DatabaseHandler.getAllWorkList_InspectionResultPicture(DatabaseHandler.java:2512)
at com.MyCompany.systm.qirs.SyncImages.onHandleIntent(SyncImages.java:59)
at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:176)
at android.os.HandlerThread.run(HandlerThread.java:60)
10-15 09:58:26.539 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) cannot open file at line 30605 of [00bb9c9ce4]
10-15 09:58:26.539 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) os_unix.c:30605: (24) open(/data/data/com.MyCompany.systm.qirs/databases) -
10-15 09:58:26.539 12045-15369/com.MyCompany.systm.qirs E/SQLiteOpenHelper﹕ Couldn't open QIRS_DataBase for writing (will try read-only):
android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:341)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:238)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:515)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:207)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:178)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:875)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:843)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:696)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:1213)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:236)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:188)
at com.androidhive.androidsqlite.DatabaseHandler.SyncToWebGetItems(DatabaseHandler.java:2693)
at com.MyCompany.systm.qirs.SyncToWeb.onHandleIntent(SyncToWeb.java:57)
at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:176)
at android.os.HandlerThread.run(HandlerThread.java:60)
10-15 09:58:26.562 12045-15369/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) cannot open file at line 32474 of [00bb9c9ce4]
10-15 09:58:26.562 12045-15369/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) os_unix.c:32474: (24) open(/data/data/com.MyCompany.systm.qirs/databases/QIRS_DataBase-journal) -
10-15 09:58:26.578 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) cannot open file at line 32474 of [00bb9c9ce4]
10-15 09:58:26.578 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) os_unix.c:32474: (24) open(/data/data/com.MyCompany.systm.qirs/databases/QIRS_DataBase-journal) -
10-15 09:58:26.578 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (10) Failed to open database file with errno : 24!
10-15 09:58:26.578 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) cannot open file at line 32474 of [00bb9c9ce4]
10-15 09:58:26.578 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) os_unix.c:32474: (24) open(/data/data/com.MyCompany.systm.qirs/databases/QIRS_DataBase-journal) -
10-15 09:58:26.578 12045-12095/com.MyCompany.systm.qirs E/SQLiteLog﹕ (14) statement aborts at 38: [INSERT INTO worklist_inspectionpoint(ID,User_ID,Date_Time,Comments,Pass,List_ID,WorklistStage_ID) VALUES (?,?,?,?,?,?,?)] unable to open database file
10-15 09:58:26.578 12045-15369/com.MyCompany.systm.qirs E/SQLiteLog﹕ (3850) statement aborts at 0: [PRAGMA user_version;] disk I/O error
10-15 09:58:26.585 12045-15369/com.MyCompany.systm.qirs W/dalvikvm﹕ threadid=18: thread exiting with uncaught exception (group=0x41589930)
10-15 09:58:26.585 12045-15369/com.MyCompany.systm.qirs I/Process﹕ Sending signal. PID: 12045 SIG: 9
我知道我在磁盘上有空间，在5.10 Gb中有3.55。我看到一个I / O错误，但我再次运行该程序，它运行没有问题。 最后，当电源连接到平板电脑时，需要执行这项服务（或者我需要稍后更改它），因为此时WiFi访问将可用，我将需要同步到主数据库并下载待处理数据。我现在有广播接收器，可以检测电源何时插上，并显示进度对话框，但它什么也没做。
所以，所有这一切......
1）对可能发生的事情的任何消息？ （关于我的错误消息）
2）有关更好地接近我的解决方案的任何建议吗？
3）当您来到蒂华纳时，奖励积分和啤酒（或玉米饼），如何在连接电源时启动服务并使用正在执行的内容更新进度对话框
非常感谢您的帮助
答案 0 :(得分：0)
错误24是MFILE：“太多打开的文件”。
有些代码会忘记关闭某些文件。
答案 1 :(得分：0)
我删除并再次执行我的代码，逻辑或多或少相同，我使用Services每2分钟将数据同步到数据库。我找到了一种方法来检测平板电脑何时与BroadCastReceiver连接（使用USB或电源）。如果你想知道如何，让我知道分享代码