Hello,
I've implemented an example of showDialog in my SourceCode. This works
normally really good. But my problem is, if you press the Back-Button
during the Progressbar dialog is showing.
The App crashes. If I write a Log in the Handler method ( "final
Handler handler = new Handler() ") I see the the App is finished but
the handler method still in a loop.
Does someone has a tip or a example what I can do?
Cheers
Tom
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Point;
import android.graphics.RectF;
import android.location.Location;
import android.location.LocationListener;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
import android.widget.Toast;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;
import com.google.android.maps.Overlay;
import de.tektom.geoformel.common.ProgressbarThread;
/**
* Zeigt Google Maps in einer MapActivity an.
* <p>
* Im Emulator zum Beispiel die Koordinaten mit <br>
* geo fix 7.1 51 300 <br>
* setzen um etwas zu sehen.
*
* @author David Müller, Arno Becker, 2010 visionera gmbh
*/
public class KarteAnzeigenActivity extends MapActivity implements
LocationListener {
private MapController map_Controller;
private MapView map_View;
private MyLocationOverlay mMyLocationOverlay ;
private GeoKontaktOverlay mMapViewOverlay;
private ProgressbarThread progThread;
private ProgressDialog progDialog;
private float mlatitude;
private float mlongitude;
/** Kuerzel fuers Logging. */
private static final String TAG =
KarteAnzeigenActivity.class.getSimpleName();
@Override
public void onCreate(Bundle savedInstanceState) {
try
{
requestWindowFeature(Window.FEATURE_LEFT_ICON);
super.onCreate(savedInstanceState);
setContentView(R.layout.mapkarte);
setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,R.drawable.icon);
showDialog(0);
if(getIntent().hasExtra("latitude") == true)
mlatitude =
getIntent().getExtras().getFloat("latitude");
if(getIntent().hasExtra("longitude") == true)
mlongitude =
getIntent().getExtras().getFloat("longitude");
initMapView();
// fuege der MapView das Overlay fuer die
// empfangene Position hinzu
initGCFormelOverlay();
// Zeige die eigene Position mit Hilfe
// des Overlays aus der Google Api
initMyLocationOverlay();
// create an overlay that shows our current location
}
catch (Exception ex)
{
Log.i(TAG, ex.getMessage());
Toast.makeText(this,"UI problem in " + TAG + "-" +
ex.getMessage(),Toast.LENGTH_LONG).show();
}
}
public void onLocationChanged(Location location) {
mlatitude = (int) (location.getLatitude());
mlongitude = (int) (location.getLongitude());
}
public void onStatusChanged(String provider, int status, Bundle
extras) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String provider) {
Toast.makeText(this, "Enabled new provider " + provider,
Toast.LENGTH_SHORT).show();
}
public void onProviderDisabled(String provider) {
Toast.makeText(this, "Disenabled provider " + provider,
Toast.LENGTH_SHORT).show();
}
@Override
protected boolean isLocationDisplayed() {
return super.isLocationDisplayed();
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
mMyLocationOverlay.disableMyLocation();
mMyLocationOverlay.disableCompass();
super.onPause();
}
@Override
protected void onResume() {
mMyLocationOverlay.enableMyLocation();
mMyLocationOverlay.enableCompass();
map_View.invalidate();
super.onResume();
}
@Override
protected void onDestroy() {
Log.d(TAG, "onDestroy() aufgerufen...");
super.onDestroy();
}
// Method to create a progress bar dialog of either spinner or
horizontal type
@Override
protected Dialog onCreateDialog(int id) {
switch(id) {
case 0: // Spinner
progDialog = new ProgressDialog(this);
progDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progDialog.setMessage("Loading...");
progDialog.setIndeterminate(true);
progDialog.setCancelable(true);
progThread = new ProgressbarThread(handler);
progThread.start();
return progDialog;
default:
return null;
}
}
// Handler on the main (UI) thread that will receive messages
from the
// second thread and update the progress.
final Handler handler = new Handler() {
public void handleMessage(Message msg) {
try
{
Log.w(TAG, "Handler still activ");
// Get the current value of the variable total from the
message data
// and update the progress bar.
int total = msg.getData().getInt("total");
progDialog.setProgress(total);
if (total <= 0){
dismissDialog(0);
progThread.setState(ProgressbarThread.DONE);
}
}
catch(Exception ex)
{
}
}
};
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if (keyCode == KeyEvent.KEYCODE_BACK &&
progDialog.isShowing())
{
// DO SOMETHING
dismissDialog(0);
}
// Call super code so we dont limit default interaction
super.onKeyDown(keyCode, event);
return true;
}
}
--
You received this message because you are subscribed to the Google
Groups "Android Developers" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en
