我想獲取地點的經度和緯度。但我沒有收到任何數據。我正在使用Gson Library來獲取數據。我不明白我在做什麼？這是我在主要片段中的代碼。使用Gson獲取Json數據

private class PostFetcher extends AsyncTask<Void,Void,String>{ 
    private static final String TAG = "PostFetcher"; 
    private static final String SERVER_URL = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=-33.8670522,151.1957362&radius=500&type=restaurant&name=cruise&key=My key here"; 
    @Override 
    protected String doInBackground(Void... params) { 

     Reader reader= API.getData(SERVER_URL); 

     try { 


      Gson gson=new GsonBuilder().create(); 
      try 
      { 
       JsonPlaces jsonplaces=gson.fromJson(reader,JsonPlaces.class); 
       System.out.println("\n\nData=\n\n"+jsonplaces); 
      } 
      catch (IllegalStateException | JsonSyntaxException exception) 
      { 
       System.out.println("Json Exception is :" + exception); 
      } 


     } catch (Exception ex) { 
      Log.e(TAG, "Failed to parse JSON due to: " + ex); 

     } 
     return null; 
    } 
}

這是我獲取數據API類：

public class API { 
private static Reader reader=null; 

public static Reader getData(String SERVER_URL) { 
    StatusLine statusLine=null; 
    HttpResponse response=null; 
    try { 

     //Create an HTTP client 
      DefaultHttpClient httpClient = new DefaultHttpClient(); 
      HttpPost httpPost = new HttpPost(SERVER_URL); 
      response = httpClient.execute(httpPost); 
      statusLine = response.getStatusLine(); 

      if (statusLine.getStatusCode() == 200) { 
       HttpEntity entity = response.getEntity(); 
       InputStream content = entity.getContent(); 
       reader = new InputStreamReader(content); 
      } 
     }catch(ClientProtocolException e){ 
      e.printStackTrace(); 
     }catch(IllegalStateException e){ 
      e.printStackTrace(); 
     }catch(IOException e){ 
      e.printStackTrace(); 
     } 
     return reader; 

} 
}

這是JSONPlaces類代碼，

public class JsonPlaces { 

@SerializedName("html_attributions") 
private List<String> html_attributions; 
@SerializedName("results") 
private List<Results> results; 
@SerializedName("status") 
private String status; 

public List<Results> getResults(){ 
    return results; 
} 
}

我的結果CALSS：

public class Results { 

    @SerializedName("id") 
    private String id; 
    @SerializedName("name") 
    private String name; 
    @SerializedName("geometry") 
    private Geometry geometry; 

    public String getId(){ 
    return id; 
    } 
    public String getName(){ 
    return name; 
    } 

    public Geometry getGeometry(){ 
    return geometry; 
    } 
    }

我的幾何等級：

public class Geometry { 

    @SerializedName("location") 
    private PlaceLocation placelocation; 

    public PlaceLocation getPlacelocation(){ 
    return placelocation; 
    } 
    }

PlaceLocation類：

public class PlaceLocation { 

     @SerializedName("lat") 
     private double latitude; 
     @SerializedName("lng") 
     private double longitude; 

    public double getLatitude(){ 
     return latitude; 
    } 
    public double getLongitude(){ 
     return longitude; 
    } 
    }

JSON響應的瀏覽器：

  { 
    "html_attributions" : [], 
    "results" : [ 
    { 
    "geometry" : { 
     "location" : { 
      "lat" : -33.86755700000001, 
      "lng" : 151.201527 
     } 
    }, 
    "icon" : "https://maps.gstatic.com/mapfiles/place_api/icons/generic_business-71.png", 
    "id" : "ce4ffe228ab7ad49bb050defe68b3d28cc879c4a", 
    "name" : "Sydney Showboats", 
    "opening_hours" : { 
     "open_now" : false, 
     "weekday_text" : [] 
    }, 
    "photos" : [ 
     { 
      "height" : 750, 
      "html_attributions" : [ 
       "\u003ca href=\"https://maps.google.com/maps/contrib/107415973755376511005/photos\"\u003e   Sydney Showboats\u003c/a\u003e" 
      ], 
      "photo_reference" : "CoQBcwAAAKUutk4re5CLfulmsz_4LeTG_5dhWuws7gnSKKDZcuUBosX4UahUozZTgUZimLJwV_bga2j X0fKzJyN9D-PePi41rrrVG9UgPfzxuHm_9xcSfwrN4UfebxEtzApFSvNpSNMppfOK8xgeVyUJXUc-McalViyC6OXyX7-WPz8Wd8RZEhBiJ_8TvAYCqoRNq8Heu3nuGhR9YAkOdsf1L9mjltLiDyozdIq7yg", 
      "width" : 1181 
     } 
    ], 
    "place_id" : "ChIJjRuIiTiuEmsRCHhYnrWiSok", 
    "rating" : 4.3, 
    "reference" : "CnRkAAAAX5DC1NPM2UjaxgF1C_coeWDC_CNVXSC6tncsttukOv37SdomXLJucWcsu3dH2CW-9cJfZ8raPI74dWlvnvuT3K9vPtqDW0ao53JkGrYJ_8__C970YyuKa-l96PjNLXd4BD7T3RrFwcLTrWhDLtfVFRIQlZaPcZUxoBnvsrj-dYooaRoUjCTduDP030huxJA_xT1GqjmiGzU", 
    "scope" : "GOOGLE", 
    "types" : [ 
     "travel_agency", 
     "restaurant", 
     "food", 
     "point_of_interest", 
     "establishment" 
     ], 
     "vicinity" : "King Street Wharf 5, Lime Street, Sydney" 
    }, 
    { 
    "geometry" : { 
     "location" : { 
      "lat" : -33.8686058, 
      "lng" : 151.2018207 
     } 
     }, 
    "icon" : "https://maps.gstatic.com/mapfiles/place_api/icons/generic_business-71.png", 
    "id" : "21a0b251c9b8392186142c798263e289fe45b4aa", 
    "name" : "Rhythmboat Cruises", 
    "photos" : [ 
     { 
      "height" : 480, 
      "html_attributions" : [ 
       "\u003ca href=\"https://maps.google.com/maps/contrib/104066891898402903288/photos\"\u003eRhythmboat Cruises\u003c/a\u003e" 
      ], 
      "photo_reference" : "CoQBcwAAAMnvNxTmiw3WZ7ePhICm_8qhylIz0-CdAeMcJJ4PEORp08NJAuxmNyCL9M2caY_vy1hz3lncZbFCh_jo4c7Vfw9TKh9EGJHdPNvxo16ma4cXh1gnmslCF7rVwgtQGmpycceyuZRYOI6pDsuZtpasze8jYJo21TS7h83WqGZlQ-7bEhATPLPhd5G9XqSIfncs2gdEGhTrK1VedQPBLt32n_IvDoQPmbXoJQ", 
      "width" : 640 
     } 
     ], 
     "place_id" : "ChIJyWEHuEmuEmsRm9hTkapTCrk", 
     "rating" : 4.2, 
    "reference" : "CnRmAAAA6rbrg4EUKVOUReV2Bmn2z4zuHe4Ukh4rLnzzMzhIwddLb8AWpffXzimjf9I5EtQXLTX0yBkauaSkh9W1bViye0gqqjvUIytPmpKxgXTPzqG5G_mP7wqhYK8bqvLhh1lEVdipU8OsNsTZsXzRrEfEYBIQcMwEKY2AOlEOc3cA37Y81RoUUwgHM59WLv8-OUeXLxCRc7baXw8", 
     "scope" : "GOOGLE", 
     "types" : [ 
     "travel_agency", 
     "restaurant", 
     "food", 
     "point_of_interest", 
     "establishment" 
     ], 
     "vicinity" : "King Street Wharf, King Street, Sydney" 
    }, 
    { 
    "geometry" : { 
     "location" : { 
      "lat" : -33.867591, 
      "lng" : 151.201196 
     } 
    }, 
    "icon" : "https://maps.gstatic.com/mapfiles/place_api/icons/generic_business-71.png", 
    "id" : "a97f9fb468bcd26b68a23072a55af82d4b325e0d", 
    "name" : "Australian Cruise Group", 
    "opening_hours" : { 
     "open_now" : false, 
     "weekday_text" : [] 
    }, 
     "photos" : [ 
     { 
      "height" : 328, 
      "html_attributions" : [ 
       "\u003ca href=\"https://maps.google.com/maps/contrib/110751364053842618118/photos\"\u003eAustralian Cruise Group\u003c/a\u003e" 
      ], 
      "photo_reference" : "CoQBcwAAAHIivSwUq-TxwmTBVInY_5QWPuFVcRAZmbTFPVcTvEvgTf0W59be9f7UthoA1AHIvKqnIP3pVky51PdTNirLdPXnh7ae5MOYwfNt1Ld72aa9B9dwzUoYHYRDWlwcE_WB11X2XqQTQ-xUWfegAE6ZN-Bfqy8_Qvz0reQAXFsFQ149EhA8OSryvknsThnrwQozzJSOGhQaxN9kONclP9IijaRzVudkgv7ARQ", 
      "width" : 329 
     } 
    ], 
     "place_id" : "ChIJrTLr-GyuEmsRBfy61i59si0", 
     "reference" : "CnRqAAAAh4WzQoBul104P5DsKrC2csOire9KA57fCw6km6PKsxL9F-MBCxFHTGM9hOkut_6YkpbEEJgRDBt_wov5Xz4f9-2b35ZKFr93Uk8SsS-rOruSIUAIJwrsKDg3yoHCK6J-A6Xndix4haZloQLzThSxGRIQqux-aXkP6OkRMbL1H6W46RoUdtpPU0qBKEmxwm9YfN6yaxtONIU", 
     "scope" : "GOOGLE", 
     "types" : [ 
     "travel_agency", 
     "restaurant", 
     "food", 
     "point_of_interest", 
     "establishment" 
    ], 
    "vicinity" : "32 The Promenade, King Street Wharf 5, Sydney" 
    }, 
     { 
     "geometry" : { 
     "location" : { 
      "lat" : -33.8709434, 
      "lng" : 151.1903114 
     } 
     }, 
     "icon" : "https://maps.gstatic.com/mapfiles/place_api/icons/generic_business-71.png", 
    "id" : "3458f23c154e574552e0722773a46f384816b241", 
    "name" : "Vagabond Cruises", 
    "opening_hours" : { 
     "open_now" : false, 
     "weekday_text" : [] 
     }, 
     "photos" : [ 
     { 
      "height" : 1067, 
      "html_attributions" : [ 
       "\u003ca href=\"https://maps.google.com/maps/contrib/101516907347198229066/photos\"\u003eVagabond Cruises\u003c/a\u003e" 
      ], 
      "photo_reference" : "CoQBcwAAAA7gDQiMEMAKEN_HDq5LU2IuSCyTBMJ22xolPMoNgMkyC_RHPdXhQexlVXciVf6wdVkd1j7uYz6R4KcxmNiSCm83_9eQAxE5CfJI1FRhxjuaVcxakk0ybU9EcKkJ7LTA8c0XwKCQQspa6wAwSTvPaOvew5lPeRqIJKMR3e8X8dH8EhAPojq_vipFXst4dgKeqfp1GhQYR5Ukv8V3Y5D3bgQVqTrRwiKkuA", 
      "width" : 1600 
     } 
     ], 
    "place_id" : "ChIJLfySpTOuEmsRMFymbMkVkOE", 
    "rating" : 4.1, 
    "reference" : "CnRkAAAA_cLaWta9QrknzbzpdC_PBq6inoy2wFbdr5w1rfNTGFnx2lLvbYUXj5e3IPl2Qk3B7LTv69rJioiodtUfOMwV8L7xjnXZ7BimCx-RcLE50CHBLnQuqHAi7NXWhsuElfh_QtXBmI83TBv4VzTTQg6jcRIQ9efx_bt2UBKrqnVrjhR8jhoU9PzTBBNxoo_gsuWQmQfK1TL4PCc", 
     "scope" : "GOOGLE", 
     "types" : [ 
     "travel_agency", 
     "restaurant", 
     "food", 
     "point_of_interest", 
     "establishment" 
     ], 
     "vicinity" : "37 Bank Street, Pyrmont" 
     }, 
    { 
    "geometry" : { 
     "location" : { 
      "lat" : -33.867551, 
      "lng" : 151.200817 
     } 
     }, 
    "icon" : "https://maps.gstatic.com/mapfiles/place_api/icons/generic_business-71.png", 
    "id" : "b0277cade7696e575824681aba949d68814f9efe", 
    "name" : "Sydney New Year's Eve Cruises", 
    "opening_hours" : { 
     "open_now" : false, 
     "weekday_text" : [] 
     }, 
     "photos" : [ 
     { 
      "height" : 1152, 
      "html_attributions" : [ 
       "\u003ca href=\"https://maps.google.com/maps/contrib/107666140764925298472/photos\"\u003eSydney New Year&#39;s Eve Cruises\u003c/a\u003e" 
      ], 
      "photo_reference" : "CoQBcwAAAFaGoAjnBfA6W_dYDkSCb548Z5IocZea2RVRX4MjS3MJGtuTBurbY8c-5j_J8glr3M8mXkuJwL-1lZDzTksUDIlaUj882PvuHJHOKKBqngZr4bL5X04ZjLpA01zvVIs8b6Bk6K1CWn8dytd4vVwqsyCHCrG1chl2sMHhX7IL3NM2EhD3tcdIZI2Df1D8DmWaSFTwGhSPb6TfSF02-8Ys8q76Fd-MptSxDg", 
      "width" : 2048 
     } 
     ], 
     "place_id" : "ChIJ__8_hziuEmsR27ucFXECfOg", 
     "reference" : "CoQBcQAAAJ-IO8QY9jm-yziMw9aLyALi9Cu1-tnPqoA9FdNrfGVYiTm56N3Y-AdrEGbEhZcy5pVuqvHVBfz3fddFfO6O8cJRfvfC73swdAt1BcLgy80YbUXQgCQYxDD4WA8YJKEAxmAKkuCCKOy1I5TTBMYcq8iWtdqJbPrA34vfJkd8DSzwEhCsKWP9OhD8iZAUZMSTIT9mGhSfHwx8kUiQ2DayEndAxX9k3BBB4A", 
     "scope" : "GOOGLE", 
     "types" : [ 
     "travel_agency", 
     "restaurant", 
     "food", 
     "point_of_interest", 
     "establishment" 
     ], 
    "vicinity" : "32 The Promenade, King Street Wharf 5, Sydney Nsw 2000, Sydney" 
     }, 
     { 
     "geometry" : { 
     "location" : { 
      "lat" : -33.86724419999999, 
      "lng" : 151.2017012 
     } 
     }, 
     "icon" : "https://maps.gstatic.com/mapfiles/place_api/icons/restaurant-71.png", 
     "id" : "c620902a8565dd4c4d605fecbe4f9b585d881b62", 
     "name" : "Blue Line Cruises", 
     "place_id" : "ChIJvwSIiTiuEmsR8hEazPa4W7U", 
     "reference" : "CnRlAAAAQ-d7744Z_XymkoVLcfRtZzaBTIEnpFIFm5pV9yu- IleAELeQY-01VvrvSfJ4pROIyNHXVNUAIx7WIZUwphbiBPTMT38dfdOw2Yae- T980OLJ5Rv4aQWdhL9nlIFsuV0RHgixOjOOGYsydMhA1MfPWRIQofFEBDRdT7IdwDRvRInHrxoUn7BLJ GjJhghPjDgYa424VwvsmPI", 
     "scope" : "GOOGLE", 
     "types" : [ "restaurant", "food", "point_of_interest", "establishment" ], 
     "vicinity" : "Australia" 
     } 
    ], 
    "status" : "OK" 
    }

我的日誌：

   6-18 20:16:35.707 13357-13357/? I/SELinux: Function: selinux_compare_spd_ram , priority [2] , priority version is VE=SEPF_SM- G361H_5.1.1_0045 
    06-18 20:16:35.707 13357-13357/? E/SELinux: [DEBUG] get_category: variable seinfo: default sensitivity: NULL, cateogry: NULL 
    06-18 20:16:35.707 13357-13357/? I/art: Late-enabling -Xcheck:jni 
    06-18 20:16:35.727 13357-13357/? I/SAMP: ActivityThread() - SAMP_ENABLE : true 
    06-18 20:16:35.747 13357-13357/? D/ContextImpl: ContextImpl running for user UserHandle{0} 0 
    06-18 20:16:35.777 13357-13357/com.example.shahik.androidtask D/ContextImpl: ContextImpl running for user UserHandle{0} 0 
    06-18 20:16:35.777 13357-13357/com.example.shahik.androidtask W/ResourcesManager: getTopLevelResources: null for user 0 
    06-18 20:16:35.827 13357-13357/com.example.shahik.androidtask D/ContextImpl: ContextImpl running for user UserHandle{0} 0 
    06-18 20:16:35.857 13357-13357/com.example.shahik.androidtask D/ContextImpl: ContextImpl running for user UserHandle{0} 0 
    06-18 20:16:35.857 13357-13357/com.example.shahik.androidtask W/ResourcesManager: getTopLevelResources: null for user 0 
    06-18 20:16:35.957 13357-13357/com.example.shahik.androidtask W/ResourcesManager: getTopLevelResources: null for user 0 
    06-18 20:16:35.957 13357-13357/com.example.shahik.androidtask D/DisplayManager: DisplayManager() 
    06-18 20:16:35.997 13357-13357/com.example.shahik.androidtask D/PhoneWindow: *FMB* installDecor mIsFloating : false 
    06-18 20:16:35.997 13357-13357/com.example.shahik.androidtask D/PhoneWindow: *FMB* installDecor flags : -2139029248 
    06-18 20:16:36.127 13357-13401/com.example.shahik.androidtask D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: false 
    06-18 20:16:36.137 13357-13357/com.example.shahik.androidtask D/PhoneWindow: *FMB* isFloatingMenuEnabled mFloatingMenuBtn : null 
    06-18 20:16:36.137 13357-13357/com.example.shahik.androidtask D/PhoneWindow: *FMB* isFloatingMenuEnabled return false 
    06-18 20:16:36.167 13357-13357/com.example.shahik.androidtask I/zzx: Making Creator dynamically 
    06-18 20:16:36.177 13357-13357/com.example.shahik.androidtask D/ContextImpl: ContextImpl running for user UserHandle{0} 0 
    06-18 20:16:36.177 13357-13357/com.example.shahik.androidtask W/ResourcesManager: getTopLevelResources: null for user 0 
    06-18 20:16:36.177 13357-13357/com.example.shahik.androidtask W/ResourcesManager: Asset path '/system/framework/com.android.media.remotedisplay.jar' does not exist or contains no resources. 
    06-18 20:16:36.177 13357-13402/com.example.shahik.androidtask I/System.out: Thread-16033(ApacheHTTPLog):Reading from variable values from setDefaultValuesToVariables 
    06-18 20:16:36.177 13357-13357/com.example.shahik.androidtask W/Reso urcesManager: Asset path '/system/framework/com.android.location.provider.jar' does not exist or contains no resources. 
    06-18 20:16:36.177 13357-13357/com.example.shahik.androidtask W/ResourcesManager: getTopLevelResources: null for user 0 
    06-18 20:16:36.177 13357-13402/com.example.shahik.androidtask I/System.out: Thread-16033(ApacheHTTPLog):isSBSettingEnabled false 
    06-18 20:16:36.177 13357-13402/com.example.shahik.androidtask I/System.out: Thread-16033(ApacheHTTPLog):isShipBuild true 
    06-18 20:16:36.177 13357-13402/com.example.shahik.androidtask I/System.out: Thread-16033(ApacheHTTPLog):SMARTBONDING_ENABLED is false 
    06-18 20:16:36.177 13357-13402/com.example.shahik.androidtask I/System.out: Thread-16033(ApacheHTTPLog):SmartBonding Enabling is false, SHIP_BUILD is true, log to file is false, DBG is false 
    06-18 20:16:36.227 13357-13357/com.example.shahik.androidtask D/ContextImpl: ContextImpl running for user UserHandle{0} 0 
    06-18 20:16:36.227 13357-13357/com.example.shahik.androidtask W/ResourcesManager: getTopLevelResources: null for user 0 
    06-18 20:16:36.237 13357-13357/com.example.shahik.androidtask D/ChimeraCfgMgr: Reading stored module config 
    06-18 20:16:36.237 13357-13371/com.example.shahik.androidtask I/art: Background sticky concurrent mark sweep GC freed 8320(544KB) AllocSpace objects, 0(0B) LOS objects, 0% free, 7MB/7MB, paused 5.554ms total 41.442ms 
    06-18 20:16:36.298 13357-13357/com.example.shahik.androidtask D/ChimeraFileApk: Primary ABI of requesting process is armeabi-v7a 
    06-18 20:16:36.298 13357-13357/com.example.shahik.androidtask D/ChimeraFileApk: Classloading successful. Optimized code found. 
    06-18 20:16:36.358 13357-13357/com.example.shahik.androidtask I/Google Maps Android API: Google Play services client version: 7095000 
    06-18 20:16:36.368 13357-13357/com.example.shahik.androidtask I/Google Maps Android API: Google Play services package version: 9083234 
    06-18 20:16:36.688 13357-13357/com.example.shahik.androidtask I/c: Token loaded from file. Expires in: 93433486 ms. 
    06-18 20:16:36.688 13357-13357/com.example.shahik.androidtask I/c: Scheduling next attempt in 93133 seconds. 
    06-18 20:16:36.878 13357-13442/com.example.shahik.androidtask I/System.out: (HTTPLog)-Static: isSBSettingEnabled false 
    06-18 20:16:36.878 13357-13442/com.example.shahik.androidtask I/System.out: (HTTPLog)-Static: isShipBuild true 
    06-18 20:16:36.878 13357-13442/com.example.shahik.androidtask I/System.out: (HTTPLog)-Thread-16037-904285906: SmartBonding Enabling is false, SHIP_BUILD is true, log to file is false, DBG is false 
    06-18 20:16:36.878 13357-13442/com.example.shahik.androidtask I/System.out: (HTTPLog)-Thread-16037-904285906: SMARTBONDING_FEATURE_ENABLED is false 
    06-18 20:16:36.888 13357-13442/com.example.shahik.androidtask I/System.out: (HTTPLog)-Static: isSBSettingEnabled false 
    06-18 20:16:36.988 13357-13401/com.example.shahik.androidtask I/OpenGLRenderer: Initialized EGL, version 1.4 
    06-18 20:16:36.988 13357-13401/com.example.shahik.androidtask D/OpenGLRenderer: Enabling debug mode 0 
    06-18 20:16:37.108 13357-13357/com.example.shahik.androidtask D/ListView: change accessibility focus position = 0 
    06-18 20:16:37.178 13357-13357/com.example.shahik.androidtask I/Timeline: Timeline: Activity_idle id: [email protected] time:47278573 
    06-18 20:16:38.089 13357-13444/com.example.shahik.androidtask I/System.out: (HTTPLog)-Static: isSBSettingEnabled false 
    06-18 20:16:38.440 13357-13443/com.example.shahik.androidtask I/System.out: (HTTPLog)-Static: isSBSettingEnabled false 
    06-18 20:16:39.210 13357-13402/com.example.shahik.androidtask I/System.out: AsyncTask #1 calls detatch() 
    06-18 20:16:39.210 13357-13402/com.example.shahik.androidtask I/System.out: Data= 
    06-18 20:16:39.210 13357-13402/com.example.shahik.androidtask I/System.out: [email protected]

來源

2016-06-18 Shahek

嘗試'HttpUrlConnection' http://stackoverflow.com/questions/8654876/http-get-using-android-httpurlconnection – mismanc

使用HTTPUrlConnection我越來越json數據。但是，當我從主類中的API類返回讀者然後Gson解析給NULL。我做的事？ – Shahek

我不明白你爲什麼同時使用reader和HttpUrlConnection。你應該閱讀這個http://stackoverflow.com/questions/22095813/androidhttpclient-versus-httpurlconnection-for-api-level-9-and-上面，如果你把'jsondata'這樣使用'gson.fromJson（jsondata ，JsonPlaces.class）;' – mismanc

我必須同意創建一個POJO類的，更舒適比許多其他方法，但在這種情況下，你會nee d要麼定義多個POJO就像使用webtool like this 或做它多一點創造性的方式...

這是我的建議......

忘了POJO和讓你在需要的到底是什麼服務器響應

例子：

這將帶您發佈的例子並打印緯度和緯度

JsonParser parser = new JsonParser(); 
JsonObject o = parser.parse(jsonResponse).getAsJsonObject(); 
JsonArray results = o.getAsJsonArray("results"); 
for (JsonElement jsonElement : results) { 
    System.out.println("Lat: " + jsonElement.getAsJsonObject().get("geometry").getAsJsonObject().get("location") 
      .getAsJsonObject().get("lat")); 
    System.out.println("Lon: " + jsonElement.getAsJsonObject().get("geometry").getAsJsonObject().get("location") 
      .getAsJsonObject().get("lng")); 
}

來源

2016-06-18 19:05:10

謝謝你。我將「jsonResponse」替換爲「reader」。我得到異常：由於：java.lang.IllegalStateException：不是一個JSON對象：null – Shahek

如果我不使用Gson庫，我可以上傳/下載圖像使用你提到的這種方法嗎？ – Shahek

不，不要使用讀者...你需要json響應作爲字符串... –

使用Gson獲取Json數據

回答

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