Android，无法解析方法getMap（）

Question

我对此代码有疑问，＆＃34;无法解析方法getMap（）。 我没有找到问题所在，请求代码帮助，我使用Android Studio，需要使用Json的mySQL标记位置。

    googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.googleMap)).getMap();`

这是完整的代码

 public class MainActivity extends FragmentActivity {

    private GoogleMap googleMap;
    private Double Latitude = 0.00;
    private Double Longitude = 0.00;
    private GoogleApiClient client2;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }

        ArrayList<HashMap<String, String>> location = null;
        String url = "http://www.evil.cl/getLatLon.php";
        try {

            JSONArray data = new JSONArray(getHttpGet(url));

            location = new ArrayList<HashMap<String, String>>();
            HashMap<String, String> map;

            for (int i = 0; i < data.length(); i++) {
                JSONObject c = data.getJSONObject(i);

                map = new HashMap<String, String>();
                map.put("LocationID", c.getString("LocationID"));
                map.put("Latitude", c.getString("Latitude"));
                map.put("Longitude", c.getString("Longitude"));
                map.put("LocationName", c.getString("LocationName"));
                location.add(map);

            }

        } catch (JSONException e) {
            e.printStackTrace();
        }

        googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.googleMap)).getMap();

        Latitude = Double.parseDouble(location.get(0).get("Latitude").toString());
        Longitude = Double.parseDouble(location.get(0).get("Longitude").toString());
        LatLng coordinate = new LatLng(Latitude, Longitude);
        googleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
        googleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(coordinate, 17));

        for (int i = 0; i < location.size(); i++) {
            Latitude = Double.parseDouble(location.get(i).get("Latitude").toString());
            Longitude = Double.parseDouble(location.get(i).get("Longitude").toString());
            String name = location.get(i).get("LocationName").toString();
            MarkerOptions marker = new MarkerOptions().position(new LatLng(Latitude, Longitude)).title(name);
            googleMap.addMarker(marker);
        }

        client2 = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
    }

    public static String getHttpGet(String url) {
        StringBuilder str = new StringBuilder();
        HttpClient client = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(url);
        try {
            HttpResponse response = client.execute(httpGet);
            StatusLine statusLine = response.getStatusLine();
            int statusCode = statusLine.getStatusCode();
            if (statusCode == 200) {
                HttpEntity entity = response.getEntity();
                InputStream content = entity.getContent();
                BufferedReader reader = new BufferedReader(new InputStreamReader(content));
                String line;
                while ((line = reader.readLine()) != null) {
                    str.append(line);
                }
            } else {
                Log.e("Log", "Failed to download result..");
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return str.toString();
    }

    @Override
    public void onStart() {
        super.onStart();
        client2.connect();
        Action viewAction = Action.newAction(
                Action.TYPE_VIEW,
                "Main Page", 


                Uri.parse("http://host/path"),

                Uri.parse("android-app://com.example.hector.prueba1/http/host/path")
        );
        AppIndex.AppIndexApi.start(client2, viewAction);
    }

    @Override
    public void onStop() {
        super.onStop();
        Action viewAction = Action.newAction(
                Action.TYPE_VIEW,
                "Main Page", 
                Uri.parse("http://host/path"),
                Uri.parse("android-app://com.example.hector.prueba1/http/host/path")
        );
        AppIndex.AppIndexApi.end(client2, viewAction);
        client2.disconnect();
    }
}

Answer 1

getMap（）方法已被弃用，但现在在play-services 9.2更新后，它已被删除，因此最好使用getMapAsync（）。只有当您不愿意将播放服务更新为适用于您应用的9.2时，您仍然可以使用getMap（）。

要使用getMapAsync（），请在您的活动或片段上实现OnMapReadyCallback接口：

public class Fragment_Map extends android.support.v4.app.Fragment
      implements OnMapReadyCallback { }

然后，在初始化地图时，使用getMapAsync（）而不是getMap（）：

 private void initializeMap() {
  if (mMap == null) {
    SupportMapFragment mapFrag = (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.fragment_map);
    mapFrag.getMapAsync(this);
  }
}

@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;
    setUpMap();
}

Answer 2

getMap已弃用getMapAsync以下方式..

所以将此更改为googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.googleMap)).getMap();到此googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.googleMap)).getMapAsync();

UpDate：

使用这种方式，

package your.app.name;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

public class MainActivity extends Activity implements OnMapReadyCallback {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        MapFragment mapFragment = (MapFragment) getFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
    }

    @Override
    public void onMapReady(GoogleMap map) {
        map.addMarker(new MarkerOptions()
                .position(new LatLng(0, 0))
                .title("Marker"));
    }

    //onCreateOptionsMenu: no changes    
    //onOptionsItemSelected: no changes
}

Answer 3

我现在有一个加载Json的问题，“getMap”它已被弃用，google说我必须使用getMap（）。 我怎么能解决问题？

这是你有代码

        try {
        JSONArray innerJsonArray = json_array.getJSONArray(0);
        JSONObject json = innerJsonArray.getJSONObject(0);
        MapFragment mapFrag = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
        GeoJsonLayer layer = new GeoJsonLayer(mapFrag.getMap() , json);
        layer.addLayerToMap();

    } catch (JSONException e) {
        e.printStackTrace();
    }

完整代码：

 public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener, OnMapReadyCallback {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        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);

        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_camera) {
            // Handle the camera action
        } else if (id == R.id.nav_gallery) {

        } else if (id == R.id.nav_slideshow) {

        } else if (id == R.id.nav_manage) {

        } else if (id == R.id.nav_share) {

        } else if (id == R.id.nav_send) {

        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }


    @Override
    public void onMapReady(GoogleMap googleMap) {
        googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
        //JSONArray json = new JSONObject();
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);

        String url = "https://www.oxidocs.com/ind/modelo/test.php";

        JSONArray user = null;

        // Creating new JSON Parser
        JSONParser jParser = new JSONParser();

        // Getting JSON from URL
        JSONArray json_array = jParser.getJSONFromUrl(url);


        try {
            JSONArray innerJsonArray = json_array.getJSONArray(0);
            JSONObject json = innerJsonArray.getJSONObject(0);
            MapFragment mapFrag = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
            GeoJsonLayer layer = new GeoJsonLayer(mapFrag.getMap() , json);
            layer.addLayerToMap();

        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

}

Answer 4

public class MapPane extends FragmentActivity implements OnMapReadyCallback {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.map_activity);

    SupportMapFragment mapFragment = ((SupportMapFragment) getChildFragmentManager()
            .findFragmentById(R.id.safety_map));
    mapFragment.getMapAsync(this);
}

@Override
public void onMapReady(GoogleMap map) {
//DO WHATEVER YOU WANT WITH GOOGLEMAP
 map.setMapType(GoogleMap.MAP_TYPE_HYBRID);
        map.setMyLocationEnabled(true);
        map.setTrafficEnabled(true);
        map.setIndoorEnabled(true);
        map.setBuildingsEnabled(true);
        map.getUiSettings().setZoomControlsEnabled(true);
    }
}

它将完美运作。感谢。