Android，无法解析getMap（）方法 [英] Android, cannot resolve method getMap()

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问题描述

我对这段代码有问题，无法解析方法getMap（）。
我找不到问题在哪里，请帮忙用代码，我使用Android Studio并需要将json的标记位置与Json 。

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

这里是完整的代码

  public class MainActivity extends FragmentActivity {
 
 private GoogleMap googleMap; 
 private Double Latitude = 0.00; 
 private Double Longitude = 0.00; 
私人GoogleApiClient客户端2; 
 
 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（政策）; 
} 
 
 ArrayList< HashMap< String，String>> location = null; 
 String url =http://www.evil.cl/getLatLon.php; 
尝试{
 
 JSONArray data = new JSONArray（getHttpGet（url））; 
 
 location = new ArrayList< HashMap< String，String>>（）; 
 HashMap< String，String>地图; 
 
 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）; 
 
 
 $ b catch（JSONException e）{
 e.printStackTrace（）; $（$ Support 
 
 $ b 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坐标=新LatLng（纬度，经度）; 
 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））的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）; 
尝试{
 HttpResponse响应= 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））; 
字符串行; （（line = reader.readLine（））！= null）{
 str.append（line）; 
 while 
} 
} 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（）; 
 
 
 $ / code>


解决方案

getMap （）方法已折旧，但现在在play-services 9.2更新后，它已被删除，所以最好使用getMapAsync（）。只有当你不愿意为你的应用程序更新play-services到9.2时，你仍然可以使用getMap（）。为了使用getMapAsync（），实现OnMapReadyCallback接口您的活动或片段：

  public class Fragment_Map extends android.support.v4.app.Fragment 
 implements OnMapReadyCallback {然后，在初始化映射的同时，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（）; 
} 
  
 
I have problem with this code, "cannot resolve method getMap().
I dont find where is the problem, please need help with code, I use Android Studio and need to take markers locations of mySQL with Json.
    googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.googleMap)).getMap();`

And here is full code
 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();
    }
}



 解决方案 
getMap() method was depreciated but now after the play-services 9.2 update, it has been removed, so better use getMapAsync(). You can still use getMap() only if you are not willing to update the play-services to 9.2 for your app.



To use getMapAsync(), implement the OnMapReadyCallback interface on your activity or fragment:
public class Fragment_Map extends android.support.v4.app.Fragment
      implements OnMapReadyCallback { }

Then, while initializing the map, use getMapAsync() instead of 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();
}



                        
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