Util类：
public class HttpUtil {
static HttpUtilhttpUtil;
OkHttpClient okHttpClient;
private HttpUtil(){
okHttpClient=new OkHttpClient();
}
//获取单利
public static HttpUtilgetInstance(){
if (httpUtil==null) {
synchronized (HttpUtil.class)
{
if (httpUtil==null)
{
httpUtil=new HttpUtil();
}
}
}
return httpUtil;
}
public void getData(String url, final HttpRespon respon){
Request request =new Request.Builder()
.url(url)
.build();
//开启一个异步请求
okHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
e.printStackTrace();
respon.onError("请求服务器失败");
}
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
public void onResponse(Call call, Response response)throws IOException {
try (ResponseBody responseBody = response.body()) {
if (!response.isSuccessful()) {
//请求失败
respon.onError("请求服务器失败");
return;
}
String date=responseBody.string();
respon.parse(date);
}
}
});
}
}
Respon类
public abstract class HttpRespon {
Class tClass;
public HttpRespon(Class cls){
this.tClass=cls;
}
public abstract void onError(String msg);
public abstract void onSuccess(T t);
public void parse(String json){
if (TextUtils.isEmpty(json))
{
//请求失败
onError("连接失败");
return;
}
if (tClass== String.class)
{
onSuccess((T)json);
return;
}
T result = JsonUtil.parseJson(json,tClass);
if (result!=null)
{
onSuccess(result);
return;
}
else {
onError("json解析失败");
}
}
}
Json解析类：
public class JsonUtil {
static GsonmGson;
public static T parseJson(String json, Class tClass){
if(mGson ==null){
mGson =new Gson();
}
if(TextUtils.isEmpty(json)){
return null ;
}
return mGson.fromJson(json,tClass);
}
}
使用示例：
HttpUtil instance = HttpUtil.getInstance();
instance.getData(url, new HttpRespon(LearnRecord.class) {
@Override
public void onError(String msg) {
Log.d(TAG,msg);
}
@Override
public void onSuccess(LearnRecord learnRecord) {
String status = learnRecord.getStatus();
Log.d(TAG,"status为"+status);
String title = learnRecord.getRecordDetials().get(0).getTitle();
Log.d(TAG,"title为"+title);
}
});
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