android - 如何在android中的Asynctask中使用自定义进度条

Question

public class LoginActivity extends Activity {

    public static final int DIALOG_LOADING = 1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);

        showDialog(DIALOG_LOADING);
        Thread thread =  new Thread(null, doSomeTask);
        thread.start();

    }


    private Runnable doSomeTask = new Runnable() {
        public void run() {
            try {
                //Code of your task
                Thread.sleep(10000);
            } catch (InterruptedException e) {}
            //Done! now continue on the UI thread
            runOnUiThread(taskDone);
        }
    };

    //Since we can't update our UI from a thread this Runnable takes care of that!
    private Runnable taskDone = new Runnable() {
        public void run() {
            dismissDialog(DIALOG_LOADING);
        }
    };



@Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
            case DIALOG_LOADING:
                final Dialog dialog = new Dialog(this, android.R.style.Theme_Translucent);
                dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
                //here we set layout of progress dialog
                dialog.setContentView(R.layout.custom_progress_dialog);
                dialog.setCancelable(true);
                dialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
                    public void onCancel(DialogInterface dialog) {
                        // TODO Auto-generated method stub

                    }
                });
                return dialog;

            default:
                return null;
        }
    };

使用 Upper 代码，我能够显示自定义进度条，但它在指定时间的线程上设置，但我在下面有异步任务。

   class download extends AsyncTask<Void,Void,Void>
{
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected Void doInBackground(Void... voids) {
        return null;
    }

    @Override
    protected void onPostExecute(Void aVoid) {
        super.onPostExecute(aVoid);
    }
}

我想在这里设置进度条一旦在后台完成然后进度条应该消失。请给我建议

Answer 1

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        dialog = new ProgressDialog(TabsActivity.this);
        dialog.setCancelable(false);
        dialog.setCanceledOnTouchOutside(false);
        dialog.setIndeterminate(false);
        dialog.setMessage("Loading ...");
        dialog.show();
    }

    @Override
    protected Void doInBackground(Void... params) {        
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
            dialog.dismiss();              
    }