Question

我在创建图表时使用processDialog，processDialog出现但不旋转。我搜索过，我需要使用Async Task，但我没有把代码放在哪里：

这是我的代码：

bCrearGraf2.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                startProgressDialog(v);
                irGraficaComparativa(null);


                }
        });

startProgressDialog（）是这样的：

public void startProgressDialog(View V)
              {
               progressBar = new ProgressDialog(V.getContext());
               progressBar.setCancelable(true);
               progressBar.setIndeterminate(true);
               progressBar.setMessage("Creating chart");
               progressBar.setProgressStyle(ProgressDialog.STYLE_SPINNER);

               progressBar.show();

              }

irGraficaComparativa（）启动新活动：

public void irGraficaComparativa(View view){

    Intent i =new Intent(this,Graficas_comparativa.class);
    i.putExtra("Id_vehiculo1",idVehChar1);
    i.putExtra("Nomb_vehiculo1",nombVeh1);
    i.putExtra("Id_vehiculo2",idVehChar2);
    i.putExtra("Nomb_vehiculo2",nombVeh2);

    Log.d("Veh1","Nombre: " + nombVeh1 + " ID: " + idVehChar1);
    Log.d("Veh1","Nombre: " + nombVeh2 + " ID: " + idVehChar2);

    startActivity(i);

}

进入活动我创建了一个AsyncTask类，但我不知道放在哪里代码。这是AsyncTask类：

public class ProgressTask extends AsyncTask <Void,Void,Void>{
    @Override
    protected void onPreExecute(){

    }

    @Override
    protected Void doInBackground(Void... arg0) {
        // TODO Auto-generated method stub
        return null;
    }

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


}

非常感谢。

Answer 1

试试这个，

public class ProgressTask extends AsyncTask <Void,Void,Void>
{
    @Override
    protected void onPreExecute()
    {
        startProgressDialog(v);
    }

    @Override
    protected Void doInBackground(Void... arg0)
   {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    protected void onPostExecute(Void result) 
    {
        progressBar.dismiss();
        irGraficaComparativa(null);

    }
}

Answer 2

在此处，进度条无用，请尝试以下链接Progress bar in android

AsyncTask中运行Process Dialog的问题

2 个答案: