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[英]Cordova and SwipeRefreshLayout Android Lollipop feature
[英]Cordova File Plugin on Android Lollipop
我想在此路徑/ storage / emulated / 0 / DCMI / Camera中訪問Android設備中的Camera目錄。 我遵循了本教程http://nightlycoding.com/index.php/2015/06/phonegapcordova-read-images-from-gallery-folder-tip/ ,該教程使用了Cordova文件插件, https://github.com/apache/ cordova-plugin-file 。 問題是,如果我在Android 4.3上運行該應用程序,則可以訪問這些文件,但是當我在Android Lollipop設備上測試該應用程序時,該目錄中的文件/目錄為空。
我讓你的代碼在這里
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
var app = {
// Application Constructor
initialize: function() {
this.bindEvents();
},
// Bind Event Listeners
//
// Bind any events that are required on startup. Common events are:
// 'load', 'deviceready', 'offline', and 'online'.
bindEvents: function() {
document.addEventListener('deviceready', this.onDeviceReady, false);
},
// deviceready Event Handler
//
// The scope of 'this' is the event. In order to call the 'receivedEvent'
// function, we must explicitly call 'app.receivedEvent(...);'
onDeviceReady: function() {
window.resolveLocalFileSystemURL(cordova.file.externalRootDirectory, onFileSystemSuccess, function(){alert("fail");});
},
};
//app.mediaFiles = [];
function onFileSystemSuccess(fileSystem) {
window.console.log(cordova.file.externalRootDirectory);
window.console.log(JSON.stringify(fileSystem));
var directoryReader = fileSystem.createReader();
alert(JSON.stringify(directoryReader)); //1
directoryReader.readEntries(function (entries) {
var i;
alert(JSON.stringify(entries)); //2
for (i = 0; i < entries.length; i++) {
if (entries[i].name === "DCIM") {
var dcimReader = entries[i].createReader();
dcimReader.readEntries(onGetDCIM, fail);
break; // remove this to traverse through all the folders and files
}
}
}, function () {
window.console.log("fail");
});
}
function onGetDCIM(entries) {
var i;
for (i = 0; i < entries.length; i++) {
if (entries[i].name === "Camera") {
var mediaReader = entries[i].createReader();
mediaReader.readEntries(onGetFileNames, fail);
break; // remove this to traverse through all the folders and files
}
//This will log all files and directories inside 100MEDIA
alert(" >>>>>>> " + entries[i].name);
}
}
function onGetFileNames(entries) {
var i;
var flag=true;
console.log("files");
for (i = 0; i < entries.length; i++) {
if (/\.(jpe?g|png|gif|bmp)$/i.test(entries[i].name)) {
if (flag){
alert(entries[i].nativeURL);
mostrarImagen(entries[i].nativeURL);
flag=false;
}
//app.mediaFiles.push(entries[i]);
//alert(JSON.stringify(entries[i]));
}
//This will log all image files found
}
}
function mostrarImagen(ImagePath){
alert("mostrar la foto " + ImagePath);
var imagen = new Image();
imagen.src = ImagePath;
document.getElementsByName("foto").src= imagen.src;
}
app.initialize();
“ onFileSystemSuccess”功能的第一個警報顯示{“ localURL”:“ cdvfile:// localhost / sdcard /”,“ hasReadEntries”:false}。 在android 4.3中,第二個警報顯示該路徑上的子目錄列表,但是對於Android 5,該列表為空。
有解決辦法嗎? 如何訪問Android Lollipop設備上的外部文件?
您可能遇到了安全策略更新問題(有關更多信息,請參閱cordova-plugin-file文檔 )。 這些是較新的,盡管它們使應用程序更安全,但我仍在嘗試抓住所有問題。 需要檢查的幾件事:
index.html
需要具有一個適當的content-security-policy元標記來處理您將要訪問的內容。 文檔建議將此作為起點:
<meta http-equiv="Content-Security-Policy" content="default-src 'self' data: gap:cdvfile:https://ssl.gstatic.com 'unsafe-eval'; style-src 'self' 'unsafe-inline'; media-src *">
config.xml
必須允許本地訪問:
<access origin="*" />
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