Android – the progressbar spinner for asynchronous tasks does not work

My problem is that when I click the button "click" to call my API, my progress bar (spinner) should be displayed when I call the API. On the contrary, my application freezes for less than a second, and then displays my load spinner for a short period of time after the call is completed (it just flashes)

This is my code

private ProgressBar spinner;
public View onCreateView(...)
{
    spinner = (ProgressBar) view.findViewById(R.id.progressBar1);
    spinner.setVisibility(View.GONE);
    ...
}



private class MyTask extends AsyncTask<String, Void, Void> {

    String pageContent = "";
    DataOutputStream wr;


    @Override
    protected void onPreExecute() {
        spinner.setVisibility(View.VISIBLE);
    }

    @Override
    public Void doInBackground(String... params) {

        requestResult.setSuccess(false);
        HttpURLConnection connection;

        try {
            String url = "myURL";

            //I only call my Api here. I delete rest so this won't bother you

            requestResult.setSuccess(true);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        JsonParser parser = new JsonParser();
        //Same here i delete nonimportant 

        MyResponse = new Gson().fromJson(jsonContent, MyResponse.class);
        done();
        spinner.setVisibility(View.GONE);
    }

}

I've tried various methods. They always freeze for one second, then the load spinner flashes and displays the contents of the API

Can you help me?

My XML file

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/scroll_view_send"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <RelativeLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:minWidth="25px"
        android:minHeight="25px">
        <ProgressBar
            android:id="@+id/progressBar1"
            style="?android:attr/progressBarStyleLarge"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true"
            android:layout_below="@id/buttonSend"
            android:visibility="gone"/>
    </RelativeLayout>
</ScrollView>

resolvent:

Try using this work example to pass the spinner box to mytask, as follows:

private class MyTask extends AsyncTask<String, Void, Void> {

    String pageContent = "";
    DataOutputStream wr;

    private final ProgressBar progress;

    public MyTask(final ProgressBar progress) {
        this.progress = progress;
    }


    @Override
    protected void onPreExecute() {
        progress.setVisibility(View.VISIBLE);
    }

    ...

    @Override
    protected void onPostExecute(Void result) {
        JsonParser parser = new JsonParser();
        //Same here i delete nonimportant 

        MyResponse = new Gson().fromJson(jsonContent, MyResponse.class);
        done();
        progress.setVisibility(View.GONE);
    }
}

Then call new MyTask (Progress).Execute ();

Edit: in your question, you mean that the phone is frozen when calling mytask. Please check this step to avoid freezing the UI in asynctask:

>Do not use the new mytask(). Get() to call mytask > and try to move to doinbackground. Myresponse = new gson(). Fromjason (jsoncontent, myresponse. Class); done(); It can be expensive

Hope to help!