我真的花了最後6個小時嘗試使用phonegap保存數據,我的第一種方法是使用localStorate API,但每次應用程序重新啓動時都會被終止,因此無用。現在我實現了它寫一個文件到文件系統,但有以下問題:Phonegap中的永久存儲
- 該文件被創建OK
- 文件具有corrent內容做
adb pull /data/data/[package name]/friends.txt)
我可以看到該文件 的內容
- 但試圖從它讀取我總是得到NULL。
這是我的代碼,如果有人能幫助我......我出出主意吧:(
var friends = [];
// Initialize the Facebook SDK
document.addEventListener('deviceready', function() {
FB.init({
appId: '[myAppID]',
nativeInterface: CDV.FB,
useCachedDialogs: false
});
// Check if we already fetched our friends
readSavedContent();
});
function readSavedContent() {
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFileSystemForRead, fail);
}
function gotFileSystemForRead(fileSystem) {
fileSystem.root.getFile("friends.txt", {create: true, exclusive: false}, gotFileEntryForRead, fail);
}
function gotFileSystemForWrite(fileSystem) {
fileSystem.root.getFile("friends.txt", {create: true, exclusive: false}, gotFileEntryForWrite, fail);
}
function gotFileEntryForRead(fileEntry) {
var reader = new FileReader();
reader.onloadend = function(evt) {
alert("Data stored is " + evt.target.result);
};
reader.readAsText(fileEntry);
}
function gotFileEntryForWrite(fileEntry) {
fileEntry.createWriter(gotFileWriter, fail);
}
function gotFileWriter(writer) {
writer.onwriteend = function(evt) {
// show a message
alert(friends.length + " friends fetched, you should be able to see them if you restart the app");
};
writer.write(JSON.stringify(friends));
}
function fail(error) {
console.log(error.code);
alert(error);
}
function login() {
FB.login(function (response) {
console.log(JSON.stringify(response));
if (response.status === "connected") {
alert("logged in: fetching friends now");
// Fetch my friends
FB.api("/fql?q=" + encodeURIComponent('SELECT uid, first_name, last_name, email, pic, pic_big, is_app_user, devices FROM user WHERE uid IN (SELECT uid2 FROM friend WHERE uid1= me()) ORDER BY first_name LIMIT 2000'),
function(response) {
friends = response.data;
// Store the data to the disk
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFileSystemForWrite, fail);
}
);
} else {
alert('not logged in');
}
}, {
scope: "email"
});
}
謝謝!我不知道我是如何錯過的:/ – raulriera 2013-05-04 00:33:43