1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
package com.mapbox.mapboxsdk.testapp.activity.feature;
import android.graphics.BitmapFactory;
import android.graphics.RectF;
import android.os.Bundle;
import android.support.annotation.RawRes;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Toast;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.style.layers.SymbolLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
import com.mapbox.mapboxsdk.testapp.R;
import com.mapbox.services.commons.geojson.Feature;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;
import java.util.List;
import timber.log.Timber;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconImage;
/**
* Test activity showcasing using the query rendered features API to count Symbols in a rectangle.
*/
public class QueryRenderedFeaturesBoxSymbolCountActivity extends AppCompatActivity {
public MapView mapView;
private MapboxMap mapboxMap;
private Toast toast;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_query_features_box);
final View selectionBox = findViewById(R.id.selection_box);
// Initialize map as normal
mapView = (MapView) findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
@SuppressWarnings("ConstantConditions")
@Override
public void onMapReady(final MapboxMap mapboxMap) {
QueryRenderedFeaturesBoxSymbolCountActivity.this.mapboxMap = mapboxMap;
// Add a symbol layer (also works with annotations)
try {
mapboxMap.addSource(new GeoJsonSource("symbols-source", readRawResource(R.raw.test_points_utrecht)));
} catch (IOException ioException) {
Timber.e("Could not load geojson: " + ioException.getMessage());
return;
}
mapboxMap.addImage(
"test-icon",
BitmapFactory.decodeResource(getResources(),
R.drawable.mapbox_marker_icon_default)
);
mapboxMap.addLayer(new SymbolLayer("symbols-layer", "symbols-source").withProperties(iconImage("test-icon")));
selectionBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Query
int top = selectionBox.getTop() - mapView.getTop();
int left = selectionBox.getLeft() - mapView.getLeft();
RectF box = new RectF(left, top, left + selectionBox.getWidth(), top + selectionBox.getHeight());
Timber.i(String.format("Querying box %s", box));
List<Feature> features = mapboxMap.queryRenderedFeatures(box, "symbols-layer");
// Show count
if (toast != null) {
toast.cancel();
}
toast = Toast.makeText(
QueryRenderedFeaturesBoxSymbolCountActivity.this,
String.format("%s features in box", features.size()),
Toast.LENGTH_SHORT);
toast.show();
}
});
}
});
}
private String readRawResource(@RawRes int rawResource) throws IOException {
InputStream is = getResources().openRawResource(rawResource);
Writer writer = new StringWriter();
char[] buffer = new char[1024];
try {
Reader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
int numRead;
while ((numRead = reader.read(buffer)) != -1) {
writer.write(buffer, 0, numRead);
}
} finally {
is.close();
}
return writer.toString();
}
public MapboxMap getMapboxMap() {
return mapboxMap;
}
@Override
protected void onStart() {
super.onStart();
mapView.onStart();
}
@Override
protected void onResume() {
super.onResume();
mapView.onResume();
}
@Override
protected void onPause() {
super.onPause();
mapView.onPause();
}
@Override
protected void onStop() {
super.onStop();
mapView.onStop();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
@Override
protected void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
}
|
