谁能帮助我使用此代码实现 ontap() 事件？下面的代码将在谷歌地图中显示用户的当前位置和酒吧位置。该代码工作正常。但我的问题是我不知道如何实现 ontap() 事件。即使我的覆盖在 oncreate 包之外，是否可以实现 onTap 事件？
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Point;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.Button;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;
import com.google.android.maps.Overlay;
import com.google.android.maps.OverlayItem;
public class BarLocatorActivity extends MapActivity {
Button map1,login1,menu1,power1;
// Creating JSON Parser object
JSONNorman jNorman = new JSONNorman();
private static String url_all_bar =
"http://xxx.xxx.xxx.xxx/xampp/BARANDROID/get_all_bars.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_BARS = "bars";
private static final String TAG_BARLAT = "bar_lat";
private static final String TAG_BARLONG = "bar_long";
// bars JSONArray
JSONArray bars = null;
private MapController mapController;
private MapView mapView;
private LocationManager locationManager;
private MyLocationOverlay myLocationOverlay;
public void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.map); // bind the layout to the activity
// Configure the Map
mapView = (MapView) findViewById(R.id.mapView);
mapView.setBuiltInZoomControls(true);
// enable Street view by default
mapView.setStreetView(true);
// mapView.setSatellite(true);
// enable to show Traffic on map
// mapView.setTraffic(true);
mapController = mapView.getController();
mapController.setZoom(15); // Zoon 1 is world view
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
0, new GeoUpdateHandler());
myLocationOverlay = new MyLocationOverlay(this, mapView);
mapView.getOverlays().add(myLocationOverlay);
myLocationOverlay.runOnFirstFix(new Runnable() {
public void run() {
mapView.getController().animateTo(myLocationOverlay.getMyLocation());
}
});
new LoadAllBars().execute();
}
/* Initiating Menu XML file (menu.xml) */
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.layout.menu, menu);
return true;
}
/**
* Event Handling for Individual menu item selected
* Identify single menu item by it's id
* */
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case R.id.view:
BarLocatorActivity.this.finish();
Intent intent1 = new Intent(getApplicationContext(),
AllBarActivity.class);
startActivity(intent1);
android.os.Process.killProcess(android.os.Process.myPid());
System.exit(0);
return true;
case R.id.map1:
BarLocatorActivity.this.finish();
Intent intent2 = new Intent(getApplicationContext(), BarLocatorActivity.class);
startActivity(intent2);
android.os.Process.killProcess(android.os.Process.myPid());
System.exit(0);
return true;
case R.id.login:
BarLocatorActivity.this.finish();
Intent intent3 = new Intent(getApplicationContext(),
SignInActivity.class);
startActivity(intent3);
android.os.Process.killProcess(android.os.Process.myPid());
System.exit(0);
return true;
case R.id.exit:
BarLocatorActivity.this.finish();
// The following makes the Android Gods frown upon me
android.os.Process.killProcess(android.os.Process.myPid());
System.exit(0);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
public class GeoUpdateHandler implements LocationListener {
@Override
public void onLocationChanged(Location location) {
int lat = (int) (location.getLatitude() * 1E6);
int lng = (int) (location.getLongitude() * 1E6);
GeoPoint point = new GeoPoint(lat, lng);
mapController.animateTo(point); // mapController.setCenter(point);
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
@Override
protected void onResume() {
super.onResume();
myLocationOverlay.enableMyLocation();
myLocationOverlay.enableCompass();
}
@Override
protected void onPause() {
super.onPause();
myLocationOverlay.disableMyLocation();
myLocationOverlay.disableCompass();
}
//bar location
class LoadAllBars extends AsyncTask<String, String, String> {
protected String doInBackground(String... args) {
List<NameValuePair> params = new ArrayList<NameValuePair>();
JSONObject json = jNorman.makeHttpRequest(url_all_bar, "GET", params);
Log.d("All bars: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
bars = json.getJSONArray(TAG_BARS);
for (int i = 0; i < bars.length(); i++) {
JSONObject c = bars.getJSONObject(i);
String bar_lat = c.getString(TAG_BARLAT);
String bar_long = c.getString(TAG_BARLONG);
double latt = Double.parseDouble(bar_lat);
double lngg = Double.parseDouble(bar_long);
GeoPoint points = new GeoPoint((int) (latt * 1E6),(int) (lngg *
1E6));
MapOverlay mapOverlay = new MapOverlay();
mapOverlay.setPointToDraw(points);
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.add(mapOverlay);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
}
//end bar location
//overlay
class MapOverlay extends Overlay {
private GeoPoint pointToDraw;
public void setPointToDraw(GeoPoint points) {
pointToDraw = points;
}
public GeoPoint getPointToDraw() {
return pointToDraw;
}
@Override
public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when) {
super.draw(canvas, mapView, shadow);
// convert point to pixels
Point screenPts = new Point();
mapView.getProjection().toPixels(pointToDraw, screenPts);
// add marker
Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.red);
canvas.drawBitmap(bmp, screenPts.x, screenPts.y - 24, null);
return true;
}
}
}
thanks in advance:)