How do I use progress bar

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How do I use progress bar

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#1 by (7 votes)

2

I have an android application, which brings latitude and longitude. I wanted the moment he is requesting it to put a progress bar to give feedback.

follows the location code

 private void start(){
         locationManager = (LocationManager)
                getSystemService(Context.LOCATION_SERVICE);

        locationListener = new MyLocationListener();
        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 10, locationListener);
 }

 private class MyLocationListener implements LocationListener {
        @Override
        public void onLocationChanged(Location loc) {

            String longitude = "Longitude: " + loc.getLongitude();
            String latitude = "Latitude: " + loc.getLatitude();

        txtTextos =  (TextView) findViewById(R.id.txtUpdate);


            txtTextos.setText(txtTextos.getText().toString() + "\n Longitude: " + loc.getLongitude() + "\n Latitude : " + loc.getLatitude());


        }

android gps progress-bar

asked by anonymous 24.07.2015 / 14:56

1 answer

Script to make a div appear Update to 2 tables

score 7 · Accepted Answer

When you need to do some tasks that need to load like network operations or something that may seem like your application is stuck, you should use a separate thread for this. However, this other thread can not update the graphical interface, that is, it should not change the contents of any visual component. To work around this problem, there is the AsyncTask class, which allows us to implement the code that will be executed before, during and after the execution of some task performed in the background, you can put this class inside your activity. Follow the code

 import android.location.Location;
import android.os.AsyncTask;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ProgressBar;

public class testeActivity extends ActionBarActivity {

    ProgressBar mProgressBar;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_teste);

        mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
    }

    private void exibirProgress(boolean exibir) {
        mProgressBar.setVisibility(exibir ? View.VISIBLE : View.GONE);
    }

    class MinhaTask extends AsyncTask<Location,Void,Location> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            exibirProgress(true);
        }

        @Override
        protected Location doInBackground(Location... params) {
            return medotodoRetornaLocation();
        }

        @Override
        protected void onPostExecute(Location location) {
            super.onPostExecute(location);
            exibirProgress(false);
            metodoAtualizaAInterfaceGrafica(location);
        }
    }
}

The display method displayProgress (boolean); is the method responsible for displaying or not progress in the view.

View progress statement:

<ProgressBar
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        style="?android:attr/progressBarStyleLarge"
        android:layout_centerInParent="true"
        android:visibility="gone"
        android:id="@+id/progressBar"
        />

Now add the methods that update the graphical interface and the one that will get the location and be happy! \ o /

To learn more about the AsyncTask class, follow the link: link