Phonegap Filereader Onloadend Doesn't Work

I'm using phonegap to take a picture and put it into a img-container. navigator.camera.getPicture(onSuccess, onFail); var onSuccess = function(imageURI) { var pic = docum

Solution 1:

Try to re-arrange your code like this:

var onSuccess =  function(imageURI) {
        var pic = document.getElementById('picture');
        pic.style.display = 'block';
        pic.src = imageURI;

        var reader = newFileReader();

        reader.onloadend = function(evt) {
              $('textarea#textarea1').val("evt triggered");
              //var socket = io.connect(addr);//socket.emit('mobilePicture', "works");
        };

        reader.readAsDataURL(imageURI);
};

var onFail = function(message) {
        $('#infoField').val(message);
};

navigator.camera.getPicture(onSuccess, onFail);

You have to pass a file object to the file.reader not just a path to the file.

Edit / update: To find a file on your filesystem by a path first you will need to create a fileEntry using the fileSystem:

Example

window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);

functiongotFS(fileSystem) {
    fileSystem.root.getFile("readme.txt", {create: true, exclusive: false}, gotFileEntry, fail);
}

functiongotFileEntry(fileEntry) {
    //fileEntryalert("Got the fileEntry!");
    reader.readAsDataURL(fileEntry);
    ...
}

Solution 2:

Using readAsDataURL may still result in corrupt images particularly with iOS. After hours of testing and research I can confirm another users findings on using readAsBinaryString() which changes handling the onloadend code too.

Reference post is at: Cordova - Reading Large Image corrupts image

To expand on @benka example and incorporate the command iOS is happy with the code might look like:

var onSuccess =  function(imageURI) {
var pic = document.getElementById('picture');
pic.style.display = 'block';
pic.src = imageURI;

var reader = newFileReader();

reader.onloadend = function(evt) {
  $('textarea#textarea1').val("evt triggered");
  //var socket = io.connect(addr);//socket.emit('mobilePicture', "works");var base64 = window.btoa(evt.target.result); // Send this to a server.var image.src = "data:image/jpeg;base64," + base64 ; // Use if you need a html src reference.
};

  reader.readAsBinaryString(imageURI);
};

var onFail = function(message) {
  $('#infoField').val(message);
};

navigator.camera.getPicture(onSuccess, onFail);