我实际上正在尝试开发一个应用程序，我必须使用json解析在地图上绘制标记。我不知道自定义标记信息窗口，我想知道如何在信息窗口上添加一个按钮，以便我可以从标记的信息窗口跳转到另一个活动。这是我的代码，
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener,OnMapReadyCallback , GoogleApiClient.ConnectionCallbacks,GoogleApiClient.OnConnectionFailedListener, View.OnClickListener {
SupportMapFragment sMapFragment;
public GoogleMap mMap;
private HttpURLConnection urlConnection = null;
private BufferedReader reader = null;
private String forecastJsonStr = null;
LoginActivity loginActivity;
private static final String TAG = "Mapsactivity";
SharedPreferences sharedPreferences;
//hereyes
double lat, lon;
//this url
private String url = "url";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
sMapFragment = SupportMapFragment.newInstance();
loginActivity = new LoginActivity();
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
sMapFragment.getMapAsync(this);
android.support.v4.app.FragmentManager sFM = getSupportFragmentManager();
sFM.beginTransaction().add(R.id.Map, sMapFragment).commit();
//sugesstion
PlaceAutocompleteFragment autocompleteFragment = (PlaceAutocompleteFragment)
getFragmentManager().findFragmentById(R.id.place_autocomplete_fragment);
autocompleteFragment.setOnPlaceSelectedListener(new PlaceSelectionListener() {
@Override
public void onPlaceSelected(Place place) {
// TODO: Get info about the selected place.
try {
String Placename = (String) place.getName();
LatLng Placelat = place.getLatLng();
double lat = Placelat.latitude;
double lng = Placelat.longitude;
String Searchlat=String.valueOf(lat);
String SearchLog=String.valueOf(lng);
SearchRequest(Searchlat,SearchLog);
onMapSearch(Placename);
} catch (IOException e) {
e.printStackTrace();
}
Log.i(TAG, "Place: " + place.getName());
//Log.i(TAG, "Lat: " + place.getLatLng());
}
@Override
public void onError(Status status) {
// TODO: Handle the error.
Log.i(TAG, "An error occurred: " + status);
}
});
}
private void SearchRequest(final String latt, final String lonn) {
//for Search Result
class RetriveMarkerTask extends AsyncTask<String, Void, String> {
private Context context;
public RetriveMarkerTask(Context context) {
this.context = context;
}
@Override
protected void onPreExecute() {
pd = new ProgressDialog(MainActivity.this);
pd.setTitle("Please wait ...");
pd.setMessage("Connecting to Loofre Network");
pd.setCancelable(false);
pd.show();
}
protected String doInBackground(String... markerGetUrl) {
String llat=markerGetUrl[0];
String llon=markerGetUrl[1];
Log.d("lattt",llat); //ok let me run ok br
if (android.os.Debug.isDebuggerConnected())
android.os.Debug.waitForDebugger();
try {
double lat = 0;
double lon = 0;
double lat_asynch= Double.parseDouble(llat);
double lon_asynch= Double.parseDouble(llon);
GPSTracker gps = new GPSTracker(MainActivity.this);
Log.d("trueee", String.valueOf(gps.canGetLocation()));
// latitude = String.valueOf(gps.getLatitude());
// longitude = String.valueOf(gps.getLongitude())
int i = 0;
String baseUrl = url;
if (llat!= null) {
baseUrl += "&radius=5&latitude=" + String.valueOf(lat_asynch) + "&longitude=" + String.valueOf(lon_asynch);
Log.d("url", baseUrl);
}
URL dataURL = new URL(baseUrl);
Log.d("urltotal", baseUrl);
//radius=5&latitude=28.669880&longitude=77.141403
//search this error in google
urlConnection = (HttpURLConnection) dataURL.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.connect();
// Read the input stream into a String
InputStream inputStream = urlConnection.getInputStream();
StringBuffer buffer = new StringBuffer();
if (inputStream == null) {
// Nothing to do.
return null;
}
reader = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
// Since it's JSON, adding a newline isn't necessary (it won't affect parsing)
// But it does make debugging a lot easier if you print out the completed
// buffer for debugging.
buffer.append(line + "\n");
}
if (buffer.length() == 0) {
// Stream was empty. No point in parsing.
return null;
}
forecastJsonStr = buffer.toString();
} catch (IOException e) {
Log.e("PlaceholderFragment", "Error ", e);
forecastJsonStr = "Error, an exception was raised.";
} finally {
if (urlConnection != null) {
}
if (reader != null) {
try {
reader.close();
} catch (final IOException e) {
Log.e("PlaceholderFragment", "Error closing stream", e);
}
}
}
return forecastJsonStr;
//pase here
}
//on post execution For SearchResult
protected void onPostExecute(String markers) {
// for map Search
Log.d("string response", markers);
Toast.makeText(MainActivity.this, "Plotting Thekha", Toast.LENGTH_LONG).show();
try {
JSONArray jsonArray = new JSONArray(markers);
for (int i = 0; i < jsonArray.length(); i++) {
//create marker of each place in the json data
JSONObject jsonObject = jsonArray.getJSONObject(i);
final String placeName = jsonObject.getString("name");
String placeAddress = jsonObject.getString("address");
double latitude = jsonObject.getJSONArray("latlang").getDouble(0);
double longitude = jsonObject.getJSONArray("latlang").getDouble(1);
LatLng loc = new LatLng(latitude, longitude);
//marker size change code
int height = 150;
int width = 150;
BitmapDrawable bitmapDrawable = (BitmapDrawable) getResources().getDrawable(R.drawable.thekhaicon);
Bitmap b = bitmapDrawable.getBitmap();
Bitmap smallMarker = Bitmap.createScaledBitmap(b, width, height, false);
//marker size change code ends here
//mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(loc, 13));
mMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromBitmap(smallMarker))
.title(placeName)
.snippet(placeAddress)
.position(loc));
}
//marker size change code
int height = 120;
int width = 120;
BitmapDrawable bitmapDrawable = (BitmapDrawable) getResources().getDrawable(R.drawable.iamhereicon);
Bitmap b = bitmapDrawable.getBitmap();
Bitmap youarehere = Bitmap.createScaledBitmap(b, width, height, false);
LatLng point = new LatLng(Double.parseDouble(latt), Double.parseDouble(lonn));
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(point, 13);
mMap.animateCamera(cameraUpdate);
pd.dismiss();
} catch (JSONException e) {
e.printStackTrace();
}
}
}
RetriveMarkerTask retriveMarkerTask=new RetriveMarkerTask(MainActivity.this);
retriveMarkerTask.execute(latt,lonn);
}