我一直在将 JSON 打印到我的 logcat,所以我可以看到它正在工作并且它停止打印中间 JSON 字符串。有人可以帮我解决问题吗?我还需要遍历 JSON 以找到特定的字符串,如何做到这一点呢?
LOGCAT SNIPET:(它很长,所以我只是添加了结尾部分)
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): },
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): {
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): "price_medium": "",
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): "id": "295",
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): "details": "",
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): "price_large": "",
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): "item_name": "Wheat Thins Toasted Chips",
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): "special_end": "",
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): "special_start": "",
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): "section_id": "3",
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): "special": false,
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): "price_small": "$0.85",
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): "location_id": "1"
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): },
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): {
07-02 20:08:19.878: D/TAG_LOCATIONS(4597): "pric
07-02 20:08:19.888: W/System.err(4597): org.json.JSONException: No value for id
07-02 20:08:19.908: W/System.err(4597): at org.json.JSONObject.get(JSONObject.java:354)
07-02 20:08:19.908: W/System.err(4597): at org.json.JSONObject.getString(JSONObject.java:510)
07-02 20:08:19.908: W/System.err(4597): at com.example.androidtablayout.FoodMenuList.onCreate(FoodMenuList.java:87)
07-02 20:08:19.908: W/System.err(4597): at android.app.Activity.performCreate(Activity.java:5104)
07-02 20:08:19.918: W/System.err(4597): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
07-02 20:08:19.918: W/System.err(4597): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
07-02 20:08:19.918: W/System.err(4597): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
07-02 20:08:19.918: W/System.err(4597): at android.app.ActivityThread.access$600(ActivityThread.java:141)
07-02 20:08:19.918: W/System.err(4597): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
07-02 20:08:19.928: W/System.err(4597): at android.os.Handler.dispatchMessage(Handler.java:99)
07-02 20:08:19.939: W/System.err(4597): at android.os.Looper.loop(Looper.java:137)
07-02 20:08:19.939: W/System.err(4597): at android.app.ActivityThread.main(ActivityThread.java:5041)
07-02 20:08:19.948: W/System.err(4597): at java.lang.reflect.Method.invokeNative(Native Method)
07-02 20:08:19.948: W/System.err(4597): at java.lang.reflect.Method.invoke(Method.java:511)
07-02 20:08:19.958: W/System.err(4597): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
07-02 20:08:19.958: W/System.err(4597): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
07-02 20:08:19.958: W/System.err(4597): at dalvik.system.NativeStart.main(Native Method)
这是类片段:
public class FoodMenuList extends Activity {
// url to make request for menus
private static String url = "http://mavmate.atticdev.ist.unomaha.edu/api/v1/services/getMenus";
// JSON Node names
private static final String TAG_LOCATIONS = "locations";
private static final String TAG_LOCATION = "Location";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_BUILDING = "building";
// contacts JSONArray
JSONArray locations = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.foodmenulist_layout);
Bundle extras = getIntent().getExtras();
String locationIDThing = extras.getString("locationID");
// Hashmap for textView
ArrayList<HashMap<String, String>> menuItemList = new ArrayList<HashMap<String, String>>();
// Creating JSON Parser instance
JSONParser jParser = new JSONParser();
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl(url);
try {
// Getting Array of locations
locations = json.getJSONArray(TAG_LOCATIONS);
// looping through All locations
for(int i = 0; i < locations.length(); i++){
JSONObject c = locations.getJSONObject(i);
Log.d("TAG_LOCATIONS", locations.toString(i));
// Storing each json item in variable
String id = c.getString(TAG_ID);
String name = c.getString(TAG_NAME);
String Location = c.getString(TAG_BUILDING);
String building = c.getString(TAG_LOCATION);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_ID, id);
map.put(TAG_NAME, name);
map.put(TAG_LOCATION, Location);
map.put(TAG_BUILDING, building);
//map.put(TAG_PHONE_MOBILE, mobile);
// adding HashList to ArrayList
menuItemList.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
非常感谢您!