Question

我是android新手。我正在开发一个应用程序，我从服务器获取纬度经度，我想在地图上显示这些点的标记。我正在使用二传手和吸气剂。但我得到相同的纬度和经度值重复，地图只显示一个标记。这是我的代码。

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_map);
    Intent intent = getIntent();
    date = intent.getStringExtra("date");
    empid = intent.getStringExtra("empid");

    Log.e("Maspp acctt iddd", "" + empid);
    Log.e("Maspp acctt dateeeee", "" + date);
    mapp = new ArrayList<Pojo>();
    new NetCheck().execute();
}


@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case android.R.id.home:
            finish();
            return true;
        default:
            return super.onOptionsItemSelected(item);
    }
}

@Override
public void onLocationChanged(Location location) {

}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {

}

@Override
public void onProviderEnabled(String provider) {

}

@Override
public void onProviderDisabled(String provider) {

}

private class NetCheck extends AsyncTask<Void, Void, Void> {

    @Override
    protected void onPostExecute(Void result) {
        // TODO Auto-generated method stub
        super.onPostExecute(result);


        SupportMapFragment supportMapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        map = supportMapFragment.getMap();
        map.setMyLocationEnabled(true);
        for (int i = 0; i < mapp.size(); i++) {
            Double lati = Double.parseDouble(pojo.getLat().toString());
            Double longi = Double.parseDouble(pojo.getLongg().toString());
            String dattme = pojo.getDateTime().toString();
            dest = new LatLng(lati, longi);
            if (map != null) {
                map.addMarker(new MarkerOptions().position(dest));
                map.moveCamera(CameraUpdateFactory.newLatLng(dest));
                map.animateCamera(CameraUpdateFactory.zoomTo(15));
                map.addMarker(new MarkerOptions()
                        .position(dest)
                        .icon(BitmapDescriptorFactory
                                .defaultMarker(BitmapDescriptorFactory.HUE_GREEN))
                        .title(""+dattme));

            }

        }
        nPregress.setVisibility(View.GONE);

        return;
    }

    @Override
    protected Void doInBackground(Void... params) {
        // TODO Auto-generated method stub

        try {

            HttpClient httpClient = new DefaultHttpClient();
            Log.e("beforeeeee", "");
            HttpPost httpRequest = new HttpPost(
                    "http://url");


            httpRequest.setHeader("Content-Type", "application/json");

            Log.e("Afetererer", "");
            JSONObject json = new JSONObject();

            json.put("login_date", date);
            json.put("empid", empid);
            Log.i("JSON Object", json.toString());


            StringEntity se = new StringEntity(json.toString());

            se.setContentEncoding("UTF-8");
            se.setContentType("application/json");

            httpRequest.setEntity(se);
            HttpResponse httpRes = httpClient.execute(httpRequest);

            java.io.InputStream inputStream = httpRes.getEntity()
                    .getContent();
            InputStreamReader inputStreamReader = new InputStreamReader(
                    inputStream);
            BufferedReader reader = new BufferedReader(inputStreamReader);
            StringBuilder sb = new StringBuilder();

            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
            inputStream.close();
            strServerResponse = sb.toString();

            Log.e("Server Response", "" + strServerResponse.toString());
            Log.e("priyankaaaa","priyuaaaaaa");

            if (strServerResponse != null) {
                try {
                    JSONArray arr = new JSONArray(strServerResponse);
                    Log.e("priyankaaa111a","priyuaa111aaaa");
                    JSONObject jsonObj = arr.getJSONObject(0);

                    for (int i = 0; i < arr.length(); i++) {
                        pojo = new Pojo();

                        String latitude = jsonObj.optString("Latitude");
                        String longitude = jsonObj.optString("Longitude");
                        String date_time = jsonObj.optString("date_time");
                        Log.e("Latitudeeeeee",""+latitude);
                        Log.e("longfffff",""+longitude);
                        Log.e("dateeee",""+date_time);
                        pojo.setLat(latitude);
                        pojo.setLongg(longitude);
                        pojo.setDateTime(date_time);

                        mapp.add(pojo);

                    }

Answer 1

错误在于你没有在每个索引处获得json对象，而是只得到第一个。
因此，将json对象放在所需的索引处，然后解析数据。

相同的纬度和经度值重复

1 个答案: