Question

我想用上传的文件替换div的背景。请注意，此div是我的上传按钮，其背景更改为：hover和：active。当文件应上传到后台时，：hover和：active属性应该不起作用。

HTML

$('#calendar').fullCalendar({
     eventRender: function(event, element, view){
        element.click(function(){
            alert('test');
        })
      }
    });

CSS

public class BackendTest extends AndroidTestCase {

    private static MyApi myApiService = null;
    private Context context;


    public void testAsyncJoke () throws Throwable{
        // create  a signal to let us know when our task is done.
        final CountDownLatch signal = new CountDownLatch(1);

        final AsyncTask<Pair<Context, String>, Void, String> myTask = new AsyncTask<Pair<Context, String>, Void, String>() {

            @Override
            protected String doInBackground(Pair<Context, String>... params) {
                if(myApiService == null) {  // Only do this once
                    MyApi.Builder builder = new MyApi.Builder(AndroidHttp.newCompatibleTransport(), new AndroidJsonFactory(), null)
                            .setRootUrl("https://androidnanodegreprojectfour.appspot.com/_ah/api/");
                    myApiService = builder.build();
                }

                context = params[0].first;
                String name = params[0].second;

                try {
                    return myApiService.sayHi(name).execute().getData();
                } catch (IOException e) {
                    return e.getMessage();
                }
            }

            @Override
            protected void onPostExecute(String result) {
                super.onPostExecute(result);
                signal.countDown();
            }
        };

        // Execute the async task on the UI thread! THIS IS KEY!
        runTestOnUiThread(new Runnable() {

            @Override
            public void run() {
                myTask.execute("Do something");
            }
        });

        signal.await(30, TimeUnit.SECONDS);

        // The task is done, and now you can assert some things!
        assertTrue("Happiness", true);
    }
}

JSFIDDLE DEMO

Answer 1

我想我得到了你。

我这样做了：

$("#uploader1").change(function(){
    $("#myImg1").css("background-image", "url("+URL.createObjectURL($(this)[0].files[0])+")");
});

How to pass variables and data from PHP to JavaScript?

通过文件输入替换div背景

1 个答案: