Htc Map View Black Screen Site Stackoverflow.com

I've been trying to implement v2 of android's MapView. I got it working just fine with the exception to this bug.

This is what it looks like when I load the app from scratch...

As you can see, no problems there.

Now, when I press the "Home" button and try to access the app from the "recent apps" window i get this:

and it stays that way until i dismiss the app and re-load it from scratch.

Here is some of my code.

Layout.xml

          <LinearLayout     android:id="@+id/maps_container"     android:layout_width="match_parent"     android:layout_height="match_parent">      <fragment android:id="@+id/map"               android:layout_width="match_parent"               android:layout_height="match_parent"               android:name="com.google.android.gms.maps.SupportMapFragment"               android:layout_marginBottom="100dip"               android:layout_marginLeft="10dip"               android:layout_marginRight="10dip"               android:layout_marginTop="100dip"/>  </LinearLayout>                  

Activity:

          public class MyActivity extends BaseActivity {  private GoogleMap mMaps; private LinearLayout mMapsContainer;  @Override public void onCreate(final Bundle savedInstanceState) {     super.onCreate(savedInstanceState);      setContentView(R.layout.my_layout);      mMapsContainer = (LinearLayout) findViewById(R.id.maps_container);      mMaps =((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();  }  @Override public void onPause() {     super.onPause(); }  @Override public void onResume() {     super.onResume();      if (mMaps == null) {         mMaps = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();     }      getSupportFragmentManager().findFragmentById(R.id.map).onResume(); }                  

}

BaseActivity:

          public abstract class BaseActivity extends FragmentActivity implements     LocationListener,     GooglePlayServicesClient.ConnectionCallbacks,     GooglePlayServicesClient.OnConnectionFailedListener {   // A request to connect to Location Services private LocationRequest mLocationRequest;  // Stores the current instantiation of the location client in this object private LocationClient mLocationClient;  // Handle to SharedPreferences for this app SharedPreferences mPrefs;  // Handle to a SharedPreferences editor SharedPreferences.Editor mEditor;  boolean mUpdatesRequested = false;  @Override protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);      // Create a new global location parameters object     mLocationRequest = LocationRequest.create();     mLocationRequest.setInterval(LocationUtils.UPDATE_INTERVAL_IN_MILLISECONDS);      // Use high accuracy     mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);      // Set the interval ceiling to one minute     mLocationRequest.setFastestInterval(LocationUtils.FAST_INTERVAL_CEILING_IN_MILLISECONDS);      // Note that location updates are off until the user turns them on     mUpdatesRequested = false;      // Open Shared Preferences     mPrefs = getSharedPreferences(LocationUtils.SHARED_PREFERENCES, Context.MODE_PRIVATE);      // Get an editor     mEditor = mPrefs.edit();      /*      * Create a new location client, using the enclosing class to      * handle callbacks.      */     mLocationClient = new LocationClient(this, this, this);  }   @Override public void onStop() {      // If the client is connected     if (mLocationClient.isConnected()) {         stopPeriodicUpdates();     }      // After disconnect() is called, the client is considered "dead".     mLocationClient.disconnect();      super.onStop(); }  @Override public void onPause() {      // Save the current setting for updates     mEditor.putBoolean(LocationUtils.KEY_UPDATES_REQUESTED, mUpdatesRequested);     mEditor.commit();      super.onPause(); }   @Override public void onStart() {      super.onStart();      /*      * Connect the client. Don't re-start any requests here;      * instead, wait for onResume()      */     mLocationClient.connect();  }   @Override public void onResume() {     super.onResume();      // If the app already has a setting for getting location updates, get it     if (mPrefs.contains(LocationUtils.KEY_UPDATES_REQUESTED)) {         mUpdatesRequested = mPrefs.getBoolean(LocationUtils.KEY_UPDATES_REQUESTED, false);          // Otherwise, turn off location updates until requested     } else {         mEditor.putBoolean(LocationUtils.KEY_UPDATES_REQUESTED, false);         mEditor.commit();     }  }   @Override protected void onActivityResult(int requestCode, int resultCode, Intent intent) {      // Choose what to do based on the request code     switch (requestCode) {          // If the request code matches the code sent in onConnectionFailed         case LocationUtils.CONNECTION_FAILURE_RESOLUTION_REQUEST :              switch (resultCode) {                 // If Google Play services resolved the problem                 case Activity.RESULT_OK:                       break;                  // If any other result was returned by Google Play services                 default:                     // Log the result                       break;             }              // If any other request code was received         default:             // Report that this Activity received an unknown requestCode             Log.d(LocationUtils.APPTAG,                     getString(R.string.unknown_activity_request_code, requestCode));              break;     } }   private boolean servicesConnected() {      // Check that Google Play services is available     int resultCode =             GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);      // If Google Play services is available     if (ConnectionResult.SUCCESS == resultCode) {         // In debug mode, log the status         Log.d(LocationUtils.APPTAG, getString(R.string.play_services_available));          // Continue         return true;         // Google Play services was not available for some reason     } else {         // Display an error dialog         Dialog dialog = GooglePlayServicesUtil.getErrorDialog(resultCode, this, 0);         if (dialog != null) {             ErrorDialogFragment errorFragment = new ErrorDialogFragment();             errorFragment.setDialog(dialog);            // errorFragment.show(getSupportFragmentManager(), LocationUtils.APPTAG);         }         return false;     } }  public void getAddress(View v) {       if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD && !Geocoder.isPresent()) {         // No geocoder is present. Issue an error message         Toast.makeText(this, R.string.no_geocoder_available, Toast.LENGTH_LONG).show();         return;     }      if (servicesConnected()) {          // Get the current location         Location currentLocation = mLocationClient.getLastLocation();           // Start the background task         (new GetAddressTask(this)).execute(currentLocation);     } }   public void startUpdates(View v) {     mUpdatesRequested = true;      if (servicesConnected()) {         startPeriodicUpdates();     } }   public void stopUpdates(View v) {     mUpdatesRequested = false;      if (servicesConnected()) {         stopPeriodicUpdates();     } }  @Override public void onConnected(Bundle bundle) {     if (mUpdatesRequested) {         startPeriodicUpdates();     }      EventBus.getDefault().post(new EventMessage().new LocationServicesConnected()); }   @Override public void onDisconnected() { }   @Override public void onConnectionFailed(ConnectionResult connectionResult) {      if (connectionResult.hasResolution()) {         try {              // Start an Activity that tries to resolve the error             connectionResult.startResolutionForResult(                     this,                     LocationUtils.CONNECTION_FAILURE_RESOLUTION_REQUEST);           } catch (IntentSender.SendIntentException e) {             e.printStackTrace();         }     } else {          // If no resolution is available, display a dialog to the user with the error.         showErrorDialog(connectionResult.getErrorCode());     } }  @Override public void onLocationChanged(Location location) {     EventBus.getDefault().post(new EventMessage().new LocationChangedEvent(location)); }   private void startPeriodicUpdates() {     mLocationClient.requestLocationUpdates(mLocationRequest, this); }   private void stopPeriodicUpdates() {     mLocationClient.removeLocationUpdates(this); }   protected class GetAddressTask extends AsyncTask<Location, Void, String> {      // Store the context passed to the AsyncTask when the system instantiates it.     Context localContext;      // Constructor called by the system to instantiate the task     public GetAddressTask(Context context) {          // Required by the semantics of AsyncTask         super();          // Set a Context for the background task         localContext = context;     }       @Override     protected String doInBackground(Location... params) {          Geocoder geocoder = new Geocoder(localContext, Locale.getDefault());          // Get the current location from the input parameter list         Location location = params[0];          // Create a list to contain the result address         List<Address> addresses = null;          // Try to get an address for the current location. Catch IO or network problems.         try {              /*              * Call the synchronous getFromLocation() method with the latitude and              * longitude of the current location. Return at most 1 address.              */             addresses = geocoder.getFromLocation(location.getLatitude(),                     location.getLongitude(), 1             );              // Catch network or other I/O problems.         } catch (IOException exception1) {              // Log an error and return an error message             Log.e(LocationUtils.APPTAG, getString(R.string.IO_Exception_getFromLocation));              // print the stack trace             exception1.printStackTrace();              // Return an error message             return (getString(R.string.IO_Exception_getFromLocation));              // Catch incorrect latitude or longitude values         } catch (IllegalArgumentException exception2) {              // Construct a message containing the invalid arguments             String errorString = getString(                     R.string.illegal_argument_exception,                     location.getLatitude(),                     location.getLongitude()             );             // Log the error and print the stack trace             Log.e(LocationUtils.APPTAG, errorString);             exception2.printStackTrace();              //             return errorString;         }         // If the reverse geocode returned an address         if (addresses != null && addresses.size() > 0) {              // Get the first address             Address address = addresses.get(0);              // Format the first line of address             String addressText = getString(R.string.address_output_string,                      // If there's a street address, add it                     address.getMaxAddressLineIndex() > 0 ?                             address.getAddressLine(0) : "",                      // Locality is usually a city                     address.getLocality(),                      // The country of the address                     address.getCountryName()             );              // Return the text             return addressText;              // If there aren't any addresses, post a message         } else {             return getString(R.string.no_address_found);         }     }      /**      * A method that's called once doInBackground() completes. Set the text of the      * UI element that displays the address. This method runs on the UI thread.      */     @Override     protected void onPostExecute(String address) {     } }  /**  * Show a dialog returned by Google Play services for the  * connection error code  *  * @param errorCode An error code returned from onConnectionFailed  */ private void showErrorDialog(int errorCode) {      // Get the error dialog from Google Play services     Dialog errorDialog = GooglePlayServicesUtil.getErrorDialog(             errorCode,             this,             LocationUtils.CONNECTION_FAILURE_RESOLUTION_REQUEST);      // If Google Play services can provide an error dialog     if (errorDialog != null) {          // Create a new DialogFragment in which to show the error dialog         ErrorDialogFragment errorFragment = new ErrorDialogFragment();          // Set the dialog in the DialogFragment         errorFragment.setDialog(errorDialog);          // Show the error dialog in the DialogFragment        // errorFragment.show(getSupportFragmentManager(), LocationUtils.APPTAG);     } }  /**  * Define a DialogFragment to display the error dialog generated in  * showErrorDialog.  */ public static class ErrorDialogFragment extends DialogFragment {      // Global field to contain the error dialog     private Dialog mDialog;      /**      * Default constructor. Sets the dialog field to null      */     public ErrorDialogFragment() {         super();         mDialog = null;     }      /**      * Set the dialog to display      *      * @param dialog An error dialog      */     public void setDialog(Dialog dialog) {         mDialog = dialog;     }      /*      * This method must return a Dialog to the DialogFragment.      */     @Override     public Dialog onCreateDialog(Bundle savedInstanceState) {         return mDialog;     } }                  

}

Htc Map View Black Screen Site Stackoverflow.com

Source: https://stackoverflow.com/questions/17603896/android-mapview-v2-black-screen

Share this post