因此，我进行了连接测试并停止了对地图引脚的 JSON 调用。但是，即使这样做了，如果用户点击地图，应用程序也会崩溃。
它似乎在 Google API 的 maps.jar 中为触摸事件调用一个方法，但我无权访问这些对吗？
那么如何测试它或者有更好的方法来检查它？
public class Map_Activity extends MapActivity implements LocationListener {
/** Called when the activity is first created. */
MapView map;
private MyLocationOverlay me = null;
Drawable d;
List<Overlay> overlayList;
LocationManager lm;
String towers;
int lat;
int longi;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.map_activity);
map = (MapView) findViewById(R.id.mapview);
Touchy t = new Touchy();
overlayList = map.getOverlays();
overlayList.add(t);
// //////////////////////////////////// Where the maps opens up to and
// zoom
map.getController().setCenter(getPoint(40.801531, -81.405661));
map.getController().setZoom(15);
Drawable marker = getResources().getDrawable(R.drawable.pin_yellow);
marker.setBounds(0, 0, marker.getIntrinsicWidth(),
marker.getIntrinsicHeight());
map.getOverlays().add(new SitesOverlay(marker));
me = new MyLocationOverlay(this, map);
map.getOverlays().add(me);
// d = getResources().getDrawable(R.drawable.pin_blue);
// Geo Location of phone
lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria crit = new Criteria();
towers = lm.getBestProvider(crit, false);
Location location = lm.getLastKnownLocation(towers);
if (location != null) {
lat = (int) (location.getLatitude() * 1E6);
longi = (int) (location.getLongitude() * 1E6);
// GeoPoint ourLocation = new GeoPoint(lat, longi);
// OverlayItem overlayItem = new OverlayItem(ourLocation,
// "Quit hitting your self", "");
// CustomPinpoint custom = new CustomPinpoint(d, Map_Activity.this);
// custom.insertPinpoint(overlayItem);
// overlayList.add(custom);
} else {
// Toast.makeText(MapsActivity.this, "Couldn't get provider",
// Toast.LENGTH_SHORT).show();
}
initLocation();
}
private void initLocation() {
lm = (LocationManager) this.getSystemService(LOCATION_SERVICE);
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 5000, 500, this);
}
@Override
public void onResume() {
super.onResume();
me.enableCompass();
lm.requestLocationUpdates(towers, 500, 1, this);
}
@Override
public void onPause() {
super.onPause();
me.disableCompass();
lm.removeUpdates(this);
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
class Touchy extends Overlay {
public boolean onTouchEvent(MotionEvent e, MapView m) {
return false;
}
}
private GeoPoint getPoint(double lat, double lon) {
return (new GeoPoint((int) (lat * 1000000.0), (int) (lon * 1000000.0)));
}
private class SitesOverlay extends ItemizedOverlay<OverlayItem> {
private List<OverlayItem> items = new ArrayList<OverlayItem>();
public SitesOverlay(Drawable marker) {
super(marker);
if (isNetworkAvailable() == true) {
boundCenterBottom(marker);
// //////////////////////////////////////////////////////////////////////
String result = queryRESTurl("http://www.mywesite.com/json.json");
Log.e("Spot 1", "");
JSONObject json;
JSONObject json2;
// JSONObject data;
try {
json = new JSONObject(result);
JSONArray nameArray = json.names();
JSONArray valArray = json.toJSONArray(nameArray);
for (int i = 0; i < valArray.length(); i++) {
Log.e(nameArray.getString(i), valArray.getString(i));
json2 = new JSONObject(valArray.getString(i));
JSONArray nameArray2 = json2.names();
JSONArray valArray2 = json2.toJSONArray(nameArray2);
for (int a = 0; a < valArray2.length(); a++) {
// add to maps here
items.add(new OverlayItem(getPoint(
valArray2.getDouble(3),
valArray2.getDouble(2)), valArray2
.getString(1), valArray2.getString(0)));
Log.e(nameArray2.getString(a),
valArray2.getString(a));
}
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Pin Locations
populate();
} else {
AlertDialog.Builder ad = new AlertDialog.Builder(
Map_Activity.this);
ad.setIcon(android.R.drawable.ic_dialog_alert);
ad.setTitle("OH NO!");
ad.setMessage("To view the latest information you need a data or wi-fi connection");
ad.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
}
});
ad.show();
}
}
@Override
protected OverlayItem createItem(int i) {
return (items.get(i));
}
@Override
protected boolean onTap(int i) {
// Toast.makeText(MapsActivity.this,
// items.get(i).getSnippet(),Toast.LENGTH_SHORT).show();
OverlayItem item = items.get(i);
AlertDialog.Builder dialog = new AlertDialog.Builder(
Map_Activity.this);
dialog.setTitle(item.getTitle());
dialog.setMessage(item.getSnippet());
dialog.show();
return (true);
}
@Override
public int size() {
return (items.size());
}
}
public void onLocationChanged(Location l) {
// TODO Auto-generated method stub
List<Overlay> overlays = map.getOverlays();
me = new MyLocationOverlay(this, map);
overlays.add(me);
me.enableMyLocation();
}
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
public String queryRESTurl(String url) {
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(url);
HttpResponse response;
try {
response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream instream = entity.getContent();
String result = RestClient.convertStreamToString(instream);
instream.close();
return result;
}
} catch (ClientProtocolException e) {
Log.e("REST", "There was a protocol based error", e);
} catch (IOException e) {
Log.e("REST", "There was an IO Stream related error", e);
}
return null;
}
/*
* Check for Connectivity
*/
public boolean isNetworkAvailable() {
Context context = getApplicationContext();
ConnectivityManager connectivity = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity == null) {
} else {
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null) {
for (int i = 0; i < info.length; i++) {
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
}
}
return false;
}
}
