import android.text.TextUtils;
import com.google.gson.Gson;
import com.google.gson.JsonNull;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
public class GsonUtils {
private static GsonUtils mInstance;
private Gson mGson;
private GsonUtils() {
mGson = new Gson();
}
public static GsonUtils getInstance() {
if (mInstance == null) {
synchronized (GsonUtils.class) {
if (mInstance == null) {
mInstance = new GsonUtils();
}
}
}
return mInstance;
}
public static Gson getGson() {
return getInstance().mGson;
}
public String toJson(Object src) {
if (src == null) {
return mGson.toJson(JsonNull.INSTANCE);
}
return mGson.toJson(src);
}
public <T> Object fromJson(String json, Class<T> classOfT) {
return mGson.fromJson(json, (Type) classOfT);
}
public Object fromJson(String json, Type typeOfT) {
return mGson.fromJson(json, typeOfT);
}
public List<Object> fromJsonArray(String json, Type typeOfT) {
return mGson.fromJson(json, typeOfT);
}
public static HashMap<String, String> jsonToMap(String jsonStr) {
HashMap<String, String> map = new HashMap<>();
if (TextUtils.isEmpty(jsonStr)) {
return new HashMap<>();
}
try {
JSONObject obj = new JSONObject(jsonStr);
Iterator<?> strKeys = obj.keys();
while (strKeys.hasNext()) {
String key = strKeys.next().toString();
String value = obj.getString(key);
if (value == null || value.equals("null")) {
value = "";
}
map.put(key, value);
}
return map;
} catch (JSONException e) {
e.printStackTrace();
}
return new HashMap<>();
}
public static ArrayList<HashMap<String, String>> jsonToList(String jsonStr) {
ArrayList<HashMap<String, String>> arrayList = new ArrayList<>();
if (TextUtils.isEmpty(jsonStr)) {
return arrayList;
}
try {
JSONArray jsonArray = new JSONArray(jsonStr);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject obj = jsonArray.getJSONObject(i);
HashMap<String, String> map = new HashMap<>();
Iterator<?> strKeys = obj.keys();
while (strKeys.hasNext()) {
String key = strKeys.next().toString();
String value = obj.getString(key);
if (value == null || value.equals("null")) {
value = "";
}
map.put(key, value);
}
arrayList.add(map);
}
return arrayList;
} catch (Exception e) {
e.printStackTrace();
}
return new ArrayList<>();
}
}