I'm using this very useful tutorial (https://github.com/RaghavSood/ProAndroidAugmentedReality) for developing a custom AR app. It works pretty fine, but when I display markers extracted from a file folder (sometimes) the app gets blocked and restarts from the previous activity. I suppose it's because of the big number of markers situated in the same point of the screen. Infact, when I lower the radius, and then showing a littler number of markers, the activity continues to work. Besides, I've tried to modify the function "getTextWidth()" as many people suggest on the net. I don't know how to reduce the number of Markers drawn on the same point of the screen (so indipendently from reducing the radius). Can you suggest me something? THANKS A LOT!!!!!
I show you the LocalDataSource.java modified:
package com.example.pointofinterests;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.Toast;
import com.example.pointofinterests.R;
import com.example.pointofinterests.IconMarker;
import com.example.pointofinterests.Marker;
/**
* This class should be used as a example local data source. It is an example of
* how to add data programatically. You can add data either programatically,
* SQLite or through any other source.
*
* @author Justin Wetherell <[email protected]>
*/
public class LocalDataSource extends DataSource {
private List<Marker> cachedMarkers = new ArrayList<Marker>();
private static Bitmap icon = null;
public LocalDataSource(Resources res) {
if (res == null) throw new NullPointerException();
createIcon(res);
}
protected void createIcon(Resources res) {
if (res == null) throw new NullPointerException();
icon = BitmapFactory.decodeResource(res, R.drawable.icon);
}
public List<Marker> getMarkers() {
try{
String TestoIDPercorsi = readFileAsString("/sdcard/Epulia/IDPercorsi.txt");
if(TestoIDPercorsi==""){
// DOING NOTHING
}else {
String[] IDPercorso = TestoIDPercorsi.split("#");
for(int l=0; l<IDPercorso.length-1; l++){
String TestoPercorso = readFileAsString("/sdcard/Epulia/Percorso" + IDPercorso[l] + ".txt");
if (TestoPercorso.equals("")){
}else {
ArrayList<String> IDSTEPS2 = new ArrayList<String>();
String[] temp = TestoPercorso.split("#");
for (int j=1; j < temp.length; j++){
Log.d("RIGA_" + j + "_" + IDPercorso[l], temp[j]);
if(temp[j].substring(0,2).contains("P")){//POI
String[] POI = temp[j].split("\\|");
String id = POI[1];
String description = POI[2];
Double lat = Double.parseDouble(POI[3]);
Double lng = Double.parseDouble(POI[4]);
String type = POI[5];
Marker poi = new IconMarker(description, lat,lng, 0, Color.DKGRAY, icon);
cachedMarkers.add(poi);
}
}
}
}
}
}catch (Exception e){
Log.e("EXCEPTION", "> " + e);
}
return cachedMarkers;
}
public static String readFileAsString(String filePath) {
String result = "";
File file = new File(filePath);
if ( file.exists() ) {
FileInputStream fis = null;
try {
fis = new FileInputStream(file);
char current;
while (fis.available() > 0) {
current = (char) fis.read();
result = result + String.valueOf(current);
}
} catch (Exception e) {
Log.d("TourGuide", e.toString());
} finally {
if (fis != null)
try {
fis.close();
} catch (IOException ignored) {
}
}
}
return result;
}
}
I would like to thank the Author of the Tutorial who helped me in fixing the problem. I report his answer that soled my problem:
Not sure why you have that limitation but this should limit the number of Markers drawn on the screen.
In class AugmentedView.java
You can introduce a new member variable:
private static int MAX_NUM_TO_DRAW = 10;
Then in the method onDraw(Canvas canvas):
You can quit the drawing loop early.
int i=0;
ListIterator<Marker> iter = collection.listIterator(collection.size());
while (iter.hasPrevious() && i<MAX_NUM_TO_DRAW ) {
Marker marker = iter.previous();
marker.draw(canvas);
i++;
}
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