使用android上的Cordova将文件写入外部(虚拟)存储

cordova plugin add cordova-plugin-file

var externalRootDir = cordova.file.externalRootDirectory;

var fileName = "example.txt";
var fileData = "This is an example file.";

window.resolveLocalFileSystemURL(externalRootDir, function(directoryEntry) {
    directoryEntry.getFile(fileName, { create: true }, function(fileEntry) {
        fileEntry.createWriter(function(fileWriter) {
            fileWriter.onwriteend = function() {
                console.log("File write complete.");
            };

            fileWriter.onerror = function(e) {
                console.log("File write failed: " + e.toString());
            };

            var blob = new Blob([fileData], { type: 'text/plain' });
            fileWriter.write(blob);
        });
    });
});

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />