Gson解析返回的JSON数据以及新开线程中Can‘t create handler inside thread that has not called Looper.prepare()

1、JSON数据的解析

1、简单类型例如int、String直接使用JSONObject构造新的对象，即可使用getString或getInt等方法进行取值

String jsonData = OkHttpUtil.doPostHttpRequest(Constant.API.LOGIN_URL, map.toString());
JSONObject Jobject = new JSONObject(jsonData);
String msg = Jobject.getString("msg");
String data = Jobject.getString("data");
if(Jobject.getInt("code")==200)
{Toast.makeText(LoginActivity.this,data+"登陆成功",Toast.LENGTH_SHORT).show();System.out.println(msg);System.out.println(data);
}
else {Toast.makeText(LoginActivity.this,"账户或密码错误",Toast.LENGTH_SHORT).show();
}

2、复杂类型比如键值对，封装一个函数

/*** 将JSON转化为Map* @param data* @return*/public static Map<String, String> JsonToMap(String data){GsonBuilder gb = new GsonBuilder();Gson g = gb.create();Map<String, String> map = g.fromJson(data, new TypeToken<Map<String, String>>() {}.getType());return map;}

调用

Map<String,String> DataMap = JsonToMap(data);
System.out.println(DataMap.get("name"));

2、新线程未绑定handler

报错Can’t create handler inside thread that has not called Looper.prepare()
解决方案：在新线程的run方法初始加上

Looper.prepare();
Looper.loop();

例如