Cordova resolveLocalFileSystemURL callbacks not fired

问题

I've been trying to run the following code but the callbacks [ok() and ko()] are not called.
Using Worklight 6.2 (Cordova 3.4).

function wlCommonInit() {
    window.requestFileSystem(LocalFileSystem.PERSISTENT, 0,
            success, fail);

    window.resolveLocalFileSystemURL(cordova.file.applicationDirectory
            + "www/index.html", ok, ko);
}

function ko(e) {
    alert("NO");
}

function ok(fileEntry) {
    alert("OK");
}

On the other hand requestFileSystem callbacks are called regularly.

回答1:

The code snippet in the question will not work in Android due to a Cordova defect: https://issues.apache.org/jira/browse/CB-7273.

To progress further, it would help to understand what are your plans for the file itself.

Do you simply want the path to the file
Or do you want to alter the contents of the file?
Or?

You can read more about file system operations in Cordova in this question/answer: Where does LocalFileSystem.PERSISTENT point to?

回答2:

I managed to access local fiiles in Worklight running an Android environment using a XMLHttpRequest:

//Works only on Android
function prendiCaricaRisorsaWorklight(percorsoPiuNomeFile) {

    var xmlhttp = new XMLHttpRequest();
    var risposta = "";
    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4
                && (xmlhttp.status == 200 || xmlhttp.status == 0)) {
            risposta = xmlhttp.responseText; 
            alert(risposta); 
        }
    }
    xmlhttp.open("GET", "file:///android_asset/www/default/"
            + percorsoPiuNomeFile, true);
    xmlhttp.send(null);
}

Usage example:

prendiCaricaRisorsaWorklight("css/cssInterno.css");
prendiCaricaRisorsaWorklight("js/jsInterno.js");

This shows on Android an alert with the file content.

来源：https://stackoverflow.com/questions/27479990/cordova-resolvelocalfilesystemurl-callbacks-not-fired

标签

android

cordova

ibm-mobilefirst