Cordova read file example

You should try firs bayanAbuawad suggestion that works most of the times: Add the platforms with cordova platform add ios android Remove them with cordova platform remove ios android Add them again. Improve this answer. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name.

Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Hi Raymond , i got a question when i run ur demo,the eclipse reports FileNotFoundException ,i don know why ,is there any problem in my config. Thks a lot! Search the blog - I also have demos for writing. Go to your applications directory via CMD windows. And typ the following command: cordova plugin add cordova-plugin-file.

With the assumption you installed the cordova CLI. After I've done npm install cordova-plugin-file which. Thanks for a very nice tutorial. My question is, how can I know that whether the file exist or not. And if it do not exist, so I would create a new one I'd check the docs on the FileSystem API Chrome's older docs , but I believe you can make a new File object on the path and check the properties there.

Definitely doable. Or - do a Directory object on the parent and get a list of files. Very informative Thanks in advance. Did you install the plugin? Did you read the docs? It isn't "just" externalStorageDirectory, it is cordova. I typoed above - but again - read the docs for more information on the alias. Thanks for the simple code. Thank you Raymond. Now I have a new related question. I am now developing an app which contains 13 mini-games. They are mini but the weight of the whole app is about Mb.

My question is: can I publish the app with just three games out of 13 and the user would download the other games one by one — with that File plugin? To get a few ideas, check out the sample at the bottom of this page.

Report issues with this plugin on the Apache Cordova issue tracker. For backwards compatibility, this can also be the full path of the file on the device. See Backwards Compatibility Notes below. Invoked with a FileTransferError object. If set to true , it accepts all security certificates. Not recommended for production use. Supported on iOS. A FileUploadResult object is passed to the success callback of the FileTransfer object's upload method. Aborts an in-progress transfer.

A FileTransferError object is passed to an error callback when an error occurs. This attribute is only available when a response code is received from the HTTP connection. This attribute is only available when a response is received from the HTTP connection.

Previous versions of this plugin would only accept device-absolute-file-paths as the source for uploads, or as the target for downloads. You also need a FileEntry object to read an existing file. Use the file property of FileEntry to get the file reference, and then create a new FileReader object.

You can use methods like readAsText to start the read operation. When the read operation is complete, this. Of course, you will often want to append existing files instead of creating new ones. Here is an example of that. This example shows another way that you can access the file system using window. In this example, pass the cross-platform Cordova file URL, cordova. The success callback receives a DirectoryEntry object, which you can use to do things like create a file.

In addition to this usage, you can use resolveLocalFileSystemURL to get access to some file system locations that are not part of the sandboxed storage system. See Where to store Files for more information; many of these storage locations are platform-specific. For the append operation, there is nothing new in the createFile function that is called in the preceding code see the preceding examples for the actual code. In writeFile , you check whether an append operation is requested.

Once you have a FileWriter object, call the seek method, and pass in the index value for the position where you want to write. In this example, you also test whether the file exists. After calling seek, then call the write method of FileWriter. We already showed how to write to a file that you just created in the sandboxed file system.

What if you need to get access to an existing file and convert that to something you can store on your device? In this example, you obtain a file using an xhr request, and then save it to the cache in the sandboxed file system. Before you get the file, get a FileSystem reference using requestFileSystem. By passing window. For completeness, here is the xhr request to get a Blob image.

There is nothing Cordova-specific in this code, except that you forward the DirectoryEntry reference that you already obtained as an argument to the saveFile function.

You will save the blob image and display it later after reading the file to validate the operation. After getting the file, copy the contents to a new file. The current DirectoryEntry object is already associated with the app cache. After writing to the file, read it and display it. You saved the image as binary data, so you can read it using FileReader.