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src/it/reyboz/bustorino/data/AppDataProvider.java

Show First 20 Lines • Show All 214 Lines • ▼ Show 20 Lines public Cursor query(Uri uri, String[] projection, String selection,
switch (sUriMatcher.match(uri)){ switch (sUriMatcher.match(uri)){
case LOCATION_SEARCH: case LOCATION_SEARCH:
//authority/stops/location/"Lat"/"Lon"/"distance" //authority/stops/location/"Lat"/"Lon"/"distance"
//distance in metres (integer) //distance in metres (integer)
if(parts.size()>=4 && "location".equals(parts.get(1))){ if(parts.size()>=4 && "location".equals(parts.get(1))){
Double latitude = Double.parseDouble(parts.get(2)); Double latitude = Double.parseDouble(parts.get(2));
Double longitude = Double.parseDouble(parts.get(3)); Double longitude = Double.parseDouble(parts.get(3));
//converting distance to a float to not lose precision //converting distance to a float to not lose precision
float distance = parts.size()>=5 ? Float.parseFloat(parts.get(4))/1000 : 0.1f; float distance = parts.size()>=5 ? Float.parseFloat(parts.get(4))/1000 : 0.02f;
if(parts.size()>=5) //if(parts.size()>=5)
Log.d("LocationSearch"," given distance to search is "+parts.get(4)+" m"); //Log.d("LocationSearch"," given distance to search is "+parts.get(4)+" m");
Double distasAngle = (distance/6371)*180/Math.PI; //small angles approximation, still valid for about 500 metres Double distasAngle = (distance/6371)*180/Math.PI; //small angles approximation, still valid for about 500 metres
String whereClause = StopsTable.COL_LAT+ "< "+(latitude+distasAngle)+" AND " String whereClause = StopsTable.COL_LAT+ "< "+(latitude+distasAngle)+" AND "
+StopsTable.COL_LAT +" > "+(latitude-distasAngle)+" AND "+ +StopsTable.COL_LAT +" > "+(latitude-distasAngle)+" AND "+
StopsTable.COL_LONG+" < "+(longitude+distasAngle)+" AND "+StopsTable.COL_LONG+" > "+(longitude-distasAngle); StopsTable.COL_LONG+" < "+(longitude+distasAngle)+" AND "+StopsTable.COL_LONG+" > "+(longitude-distasAngle);
//Log.d("Provider-LOCSearch","Querying stops by position, query args: \n"+whereClause); //Log.d("Provider-LOCSearch","Querying stops by position, query args: \n"+whereClause);
return db.query(StopsTable.TABLE_NAME,projection,whereClause,null,null,null,null); return db.query(StopsTable.TABLE_NAME,projection,whereClause,null,null,null,null);
} }
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