Esporta sqlite db nell'app phoneseg

Question

Abbiamo un'app che utilizza cordova (PhoneGap) e il suo DB sqlite (voglio dire, non abbiamo installato un sqlite esterno).

Abbiamo bisogno di fare il backup del DB nella memoria SD ma abbiamo problemi ad esportare il file sqlite da PhoneGap a SD.

Qualcuno può aiutarci?

Answer 1

Molti tempo fa ... ma penso che questa era la soluzione:

function failFiles(error) {   
    if (error.code == FileError.NOT_FOUND_ERR) alert("Message : NOT_FOUND_ERR") 
    else if (error.code == FileError.SECURITY_ERR) alert("Message : SECURITY_ERR") 
    else if (error.code == FileError.ABORT_ERR) alert("Message : ABORT_ERR") 
    else if (error.code == FileError.NOT_READABLE_ERR) alert("Message : NOT_READABLE_ERR") 
    else if (error.code == FileError.ENCODING_ERR) alert("Message : ENCODING_ERR") 
    else if (error.code == FileError.NO_MODIFICATION_ALLOWED_ERR) alert("Message : NO_MODIFICATION_ALLOWED_ERR") 
    else if (error.code == FileError.INVALID_STATE_ERR) alert("Message : INVALID_STATE_ERR") 
    else if (error.code == FileError.SYNTAX_ERR) alert("Message : SYNTAX_ERR") 
    else if (error.code == FileError.INVALID_MODIFICATION_ERR) alert("Message : INVALID_MODIFICATION_ERR") 
    else if (error.code == FileError.QUOTA_EXCEEDED_ERR) alert("Message : QUOTA_EXCEEDED_ERR") 
    else if (error.code == FileError.PATH_EXISTS_ERR) alert("Message : PATH_EXISTS_ERR") 
} 

function successDump() {  
} 

//Export DB. Get the file  file:///data/data/yourproject/app_database/file__0/0000000000000001.db 
//and save in the SD with the name yourproject.db 
function copyBdtoSD() {  
    window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, successDump, failFiles);   window.resolveLocalFileSystemURI("file:///data/data/yourproject/app_database/file__0/0000000000000001.db", copyFileToSd, failFiles); 
} 


function copyFileToSd(entry) {  
    var parent = "file:///mnt/sdcard", 
     parentName = parent.substring(parent.lastIndexOf('/')+1),   
     parentEntry = new DirectoryEntry(parentName, parent);  
    var newName = "yourproject.db"; 

    // copy the file 
    entry.copyTo(parentEntry, newName, successExport, failFiles);  
} 

Answer 2

Questo suona bene con Cordova 3.5 e 1.2.1 org.apache.cordova.file

Alcune varianti necessarie per percorso diverso.

window.resolveLocalFileSystemURL("file:///data/data/my-app-name/databases/name-of.db", function(fs) { 
       var parent = "file://mnt/external_sd/"; 
       var newName = "mybackup.db"; 
       window.resolveLocalFileSystemURL(parent, function(directoryEntry) { 
        fs.copyTo(directoryEntry, newName, function() { 
         alert("Backup ok"); 
        }, failFiles); 
       }); 
      }, failFiles); 

function failFiles(error) {   
    if (error.code == FileError.NOT_FOUND_ERR) alert("Message : NOT_FOUND_ERR") 
    else if (error.code == FileError.SECURITY_ERR) alert("Message : SECURITY_ERR") 
    else if (error.code == FileError.ABORT_ERR) alert("Message : ABORT_ERR") 
    else if (error.code == FileError.NOT_READABLE_ERR) alert("Message : NOT_READABLE_ERR") 
    else if (error.code == FileError.ENCODING_ERR) alert("Message : ENCODING_ERR") 
    else if (error.code == FileError.NO_MODIFICATION_ALLOWED_ERR) alert("Message : NO_MODIFICATION_ALLOWED_ERR") 
    else if (error.code == FileError.INVALID_STATE_ERR) alert("Message : INVALID_STATE_ERR") 
    else if (error.code == FileError.SYNTAX_ERR) alert("Message : SYNTAX_ERR") 
    else if (error.code == FileError.INVALID_MODIFICATION_ERR) alert("Message : INVALID_MODIFICATION_ERR") 
    else if (error.code == FileError.QUOTA_EXCEEDED_ERR) alert("Message : QUOTA_EXCEEDED_ERR") 
    else if (error.code == FileError.PATH_EXISTS_ERR) alert("Message : PATH_EXISTS_ERR") 
} 

Answer 3

Un paio di anni di ritardo, lo so, ma questo sta lavorando per me su Cordova 5.4.1 e in esecuzione su Android (credo iOS utilizza cordova.file.application troppo, ma non ho ancora testato):

this.getdbfilename = function() { 
    return "dbfile.db"; 
}; 

this.getdbdirectory = function() { 
    return cordova.file.applicationStorageDirectory + "databases/"; 
}; 


// copy DB file out to non-private app directory. 
this.copyDBFileOut = function (outfilename) { 
    window.resolveLocalFileSystemURL(this.getdbdirectory() + this.getdbfilename(), function (fileEntry) { 
     window.resolveLocalFileSystemURL((cordova.file.externalDataDirectory || cordova.file.documentsDirectory), function(dirEntry) { 
      fileEntry.copyTo(dirEntry, outfilename, function() { console.log("copyDBFileOut() succeeded");}, this.errorHandler); 
     }); 
     }); 
    };