*/
Application getApplicationContext();
}
这里就是要在请求网络接口的时候打印当前的App的运行信息，可以根据实际的需求再进行一次补充。
在network包下新建一个utils包，包下新建一个DateUtil类，代码如下：
public class DateUtil {
public static final String STANDARD_TIME = "yyyy-MM-dd HH:mm:ss";
public static final String FULL_TIME = "yyyy-MM-dd HH:mm:ss.SSS";
public static final String YEAR_MONTH_DAY = "yyyy-MM-dd";
public static final String YEAR_MONTH_DAY_CN = "yyyy年MM月dd号";
public static final String HOUR_MINUTE_SECOND = "HH:mm:ss";
public static final String HOUR_MINUTE_SECOND_CN = "HH时mm分ss秒";
public static final String YEAR = "yyyy";
public static final String MONTH = "MM";
public static final String DAY = "dd";
public static final String HOUR = "HH";
public static final String MINUTE = "mm";
public static final String SECOND = "ss";
public static final String MILLISECOND = "SSS";
public static final String YESTERDAY = "昨天";
public static final String TODAY = "今天";
public static final String TOMORROW = "明天";
public static final String SUNDAY = "星期日";
public static final String MONDAY = "星期一";
public static final String TUESDAY = "星期二";
public static final String WEDNESDAY = "星期三";
public static final String THURSDAY = "星期四";
public static final String FRIDAY = "星期五";
public static final String SATURDAY = "星期六";
public static final String[] weekDays = {SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY};
/**
-
获取标准时间
-
@return 例如 2021-07-01 10:35:53
*/
public static String getDateTime() {
return new SimpleDateFormat(STANDARD_TIME, Locale.CHINESE).format(new Date());
}
/**
-
获取完整时间
-
@return 例如 2021-07-01 10:37:00.748
*/
public static String getFullDateTime() {
return new SimpleDateFormat(FULL_TIME, Locale.CHINESE).format(new Date());
}
/**
-
获取年月日(今天)
-
@return 例如 2021-07-01
*/
public static String getTheYearMonthAndDay() {
return new SimpleDateFormat(YEAR_MONTH_DAY, Locale.CHINESE).format(new Date());
}
/**
-
获取年月日
-
@return 例如 2021年07月01号
*/
public static String getTheYearMonthAndDayCn() {
return new SimpleDateFormat(YEAR_MONTH_DAY_CN, Locale.CHINESE).format(new Date());
}
/**
-
获取年月日
-
@param delimiter 分隔符
-
@return 例如 2021年07月01号
*/
public static String getTheYearMonthAndDayDelimiter(CharSequence delimiter) {
return new SimpleDateFormat(YEAR + delimiter + MONTH + delimiter + DAY, Locale.CHINESE).format(new Date());
}
/**
-
获取时分秒
-
@return 例如 10:38:25
*/
public static String getHoursMinutesAndSeconds() {
return new SimpleDateFormat(HOUR_MINUTE_SECOND, Locale.CHINESE).format(new Date());
}
/**
-
获取时分秒
-
@return 例如 10时38分50秒
*/
public static String getHoursMinutesAndSecondsCn() {
return new SimpleDateFormat(HOUR_MINUTE_SECOND_CN, Locale.CHINESE).format(new Date());
}
/**
-
获取时分秒
-
@param delimiter 分隔符
-
@return 例如 2021/07/01
*/
public static String getHoursMinutesAndSecondsDelimiter(CharSequence delimiter) {
return new SimpleDateFormat(HOUR + delimiter + MINUTE + delimiter + SECOND, Locale.CHINESE).format(new Date());
}
/**
-
获取年
-
@return 例如 2021
*/
public static String getYear() {
return new SimpleDateFormat(YEAR, Locale.CHINESE).format(new Date());
}
/**
-
获取月
-
@return 例如 07
*/
public static String getMonth() {
return new SimpleDateFormat(MONTH, Locale.CHINESE).format(new Date());
}
/**
-
获取天
-
@return 例如 01
*/
public static String getDay() {
return new SimpleDateFormat(DAY, Locale.CHINESE).format(new Date());
}
/**
-
获取小时
-
@return 例如 10
*/
public static String getHour() {
return new SimpleDateFormat(HOUR, Locale.CHINESE).format(new Date());
}
/**
-
获取分钟
-
@return 例如 40
*/
public static String getMinute() {
return new SimpleDateFormat(MINUTE, Locale.CHINESE).format(new Date());
}
/**
-
获取秒
-
@return 例如 58
*/
public static String getSecond() {
return new SimpleDateFormat(SECOND, Locale.CHINESE).format(new Date());
}
/**
-
获取毫秒
-
@return 例如 666
*/
public static String getMilliSecond() {
return new SimpleDateFormat(MILLISECOND, Locale.CHINESE).format(new Date());
}
/**
-
获取时间戳
-
@return 例如 1625107306051
*/
public static long getTimestamp() {
return System.currentTimeMillis();
}
/**
-
将时间转换为时间戳
-
@param time 例如 2021-07-01 10:44:11
-
@return 1625107451000
*/
public static long dateToStamp(String time) {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(STANDARD_TIME, Locale.CHINESE);
Date date = null;
try {
date = simpleDateFormat.parse(time);
} catch (ParseException e) {
e.printStackTrace();
}
return Objects.requireNonNull(date).getTime();
}
/**
-
将时间戳转换为时间
-
@param timeMillis 例如 1625107637084
-
@return 例如 2021-07-01 10:47:17
*/
public static String stampToDate(long timeMillis) {
return new SimpleDateFormat(STANDARD_TIME, Locale.CHINESE).format(new Date(timeMillis));
}
/**
-
获取今天是星期几
-
@return 例如 星期四
*/
public static String getTodayOfWeek() {
Calendar cal = Calendar.getInstance();
cal.setTime(new Date());
int index = cal.get(Calendar.DAY_OF_WEEK) - 1;
if (index < 0) {
index = 0;
}
return weekDays[index];
}
/**
-
根据输入的日期时间计算是星期几
-
@param dateTime 例如 2021-06-20
-
@return 例如 星期日
*/
public static String getWeek(String dateTime) {
Calendar cal = Calendar.getInstance();
if ("".equals(dateTime)) {
cal.setTime(new Date(System.currentTimeMillis()));
} else {
SimpleDateFormat sdf = new SimpleDateFormat(YEAR_MONTH_DAY, Locale.getDefault());
Date date;
try {
date = sdf.parse(dateTime);
} catch (ParseException e) {
date = null;
e.printStackTrace();
}
if (date != null) {
cal.setTime(new Date(date.getTime()));
}
}
return weekDays[cal.get(Calendar.DAY_OF_WEEK) - 1];
}
/**
-
获取输入日期的昨天
-
@param date 例如 2021-07-01
-
@return 例如 2021-06-30
*/
public static String getYesterday(Date date) {
Calendar calendar = new GregorianCalendar();
calendar.setTime(date);
calendar.add(Calendar.DATE, -1);
date = calendar.getTime();
return new SimpleDateFormat(YEAR_MONTH_DAY, Locale.getDefault()).format(date);
}
/**
-
获取输入日期的明天
-
@param date 例如 2021-07-01
-
@return 例如 2021-07-02
*/
public static String getTomorrow(Date date) {
Calendar calendar = new GregorianCalendar();
calendar.setTime(date);
calendar.add(Calendar.DATE, +1);
date = calendar.getTime();
return new SimpleDateFormat(YEAR_MONTH_DAY, Locale.getDefault()).format(date);
}
/**
-
根据年月日计算是星期几并与当前日期判断 非昨天、今天、明天 则以星期显示
-
@param dateTime 例如 2021-07-03
-
@return 例如 星期六
*/
public static String getDayInfo(String dateTime) {
String dayInfo;
String yesterday = getYesterday(new Date());
String today = getTheYearMonthAndDay();
String tomorrow = getTomorrow(new Date());
if (dateTime.equals(yesterday)) {
dayInfo = YESTERDAY;
} else if (dateTime.equals(today)) {
dayInfo = TODAY;
} else if (dateTime.equals(tomorrow)) {
dayInfo = TOMORROW;
} else {
dayInfo = getWeek(dateTime);
}
return dayInfo;
}
/**
-
获取本月天数
-
@return 例如 31
*/
public static int getCurrentMonthDays() {
Calendar calendar = Calendar.getInstance();
//把日期设置为当月第一天
calendar.set(Calendar.DATE, 1);
//日期回滚一天，也就是最后一天
calendar.roll(Calendar.DATE, -1);
return calendar.get(Calendar.DATE);
}
/**
-
获得指定月的天数
-
@param year 例如 2021
-
@param month 例如 7
-
@return 例如 31
*/
public static int getMonthDays(int year, int month) {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.YEAR, year);
calendar.set(Calendar.MONTH, month - 1);
//把日期设置为当月第一天
calendar.set(Calendar.DATE, 1);
//日期回滚一天，也就是最后一天
calendar.roll(Calendar.DATE, -1);
return calendar.get(Calendar.DATE);
}
}
日志工具类，在utils包下新建KLog类，代码如下：
/**
- 自定义日志类
*/
public final class KLog {
private static boolean IS_SHOW_LOG = true;
private static final String DEFAULT_MESSAGE = "execute";
private static final String LINE_SEPARATOR = System.getProperty("line.separator");
private static final int JSON_INDENT = 4;
private static final int V = 0x1;
private static final int D = 0x2;
private static final int I = 0x3;
private static final int W = 0x4;
private static final int E = 0x5;
private static final int A = 0x6;
private static final int JSON = 0x7;
public static void init(boolean isShowLog) {
IS_SHOW_LOG = isShowLog;
}
public static void v() {
printLog(V, null, DEFAULT_MESSAGE);
}
public static void v(String msg) {
printLog(V, null, msg);
}
public static void v(String tag, String msg) {
printLog(V, tag, msg);
}
public static void d() {
printLog(D, null, DEFAULT_MESSAGE);
}
public static void d(String msg) {
printLog(D, null, msg);
}
public static void d(String tag, String msg) {
printLog(D, tag, msg);
}
public static void i() {
printLog(I, null, DEFAULT_MESSAGE);
}
public static void i(String msg) {
printLog(I, null, msg);
}
public static void i(String tag, String msg) {
printLog(I, tag, msg);
}
public static void w() {
printLog(W, null, DEFAULT_MESSAGE);
}
public static void w(String msg) {
printLog(W, null, msg);
}
public static void w(String tag, String msg) {
printLog(W, tag, msg);
}
public static void e() {
printLog(E, null, DEFAULT_MESSAGE);
}
public static void e(String msg) {
printLog(E, null, msg);
}
public static void e(String tag, String msg) {
printLog(E, tag, msg);
}
public static void a() {
printLog(A, null, DEFAULT_MESSAGE);
}
public static void a(String msg) {
printLog(A, null, msg);
}
public static void a(String tag, String msg) {
printLog(A, tag, msg);
}
public static void json(String jsonFormat) {
printLog(JSON, null, jsonFormat);
}
public static void json(String tag, String jsonFormat) {
printLog(JSON, tag, jsonFormat);
}
private static void printLog(int type, String tagStr, String msg) {
if (!IS_SHOW_LOG) {
return;
}
StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
int index = 4;
String className = stackTrace[index].getFileName();
String methodName = stackTrace[index].getMethodName();
int lineNumber = stackTrace[index].getLineNumber();
String tag = (tagStr == null ? className : tagStr);
methodName = methodName.substring(0, 1).toUpperCase() + methodName.substring(1);
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("[ (").append(className).append(":").append(lineNumber).append(")#").append(methodName).append(" ] ");
if (msg != null && type != JSON) {
stringBuilder.append(msg);
}
String logStr = stringBuilder.toString();
switch (type) {
case V:
Log.v(tag, logStr);
break;
case D:
Log.d(tag, logStr);
break;
case I:
Log.i(tag, logStr);
break;
case W:
Log.w(tag, logStr);
break;
case E:
Log.e(tag, logStr);
break;
case A:
Log.wtf(tag, logStr);
break;
case JSON: {
if (TextUtils.isEmpty(msg)) {
Log.d(tag, "Empty or Null json content");
return;
}
String message = null;
try {
if (msg.startsWith("{")) {
JSONObject jsonObject = new JSONObject(msg);
message = jsonObject.toString(JSON_INDENT);
} else if (msg.startsWith("[")) {
JSONArray jsonArray = new JSONArray(msg);
message = jsonArray.toString(JSON_INDENT);
}
} catch (JSONException e) {
e(tag, e.getCause().getMessage() + "\n" + msg);
return;
}
printLine(tag, true);
message = logStr + LINE_SEPARATOR + message;
String[] lines = message.split(LINE_SEPARATOR);
StringBuilder jsonContent = new StringBuilder();
for (String line : lines) {
jsonContent.append("║ ").append(line).append(LINE_SEPARATOR);
}
Log.d(tag, jsonContent.toString());
printLine(tag, false);
}
break;
default:
break;
}
}
private static void printLine(String tag, boolean isTop) {
if (isTop) {
Log.d(tag, "╔═══════════════════════════════════════════════════════════════════════════════════════");
} else {
Log.d(tag, "╚═══════════════════════════════════════════════════════════════════════════════════════");
}
}
}
1. Base
在通过网络请求返回数据时，先进行一个数据解析，得到结果码和错误信息，在network包下新建一个BaseResponse类，代码如下：
/**
-
基础返回类
-
@author llw
*/
public class BaseResponse {
//返回码
@SerializedName("res_code")
@Expose
public Integer responseCode;
//返回的错误信息
@SerializedName("res_error")
@Expose
public String responseError;
}
然后再自定义一个BaseObserver类，继承自rxjava的Observer。依然在network包下创建，代码如下：
/**
-
自定义Observer
-
@author llw
*/
public abstract class BaseObserver implements Observer {
//开始
@Override
public void onSubscribe(Disposable disposable) {
}
//继续
@Override
public void onNext(T t) {
onSuccess(t);
}
//异常
@Override
public void onError(Throwable e) {
onFailure(e);
}
//完成
@Override
public void onComplete() {
}
//成功
public abstract void onSuccess(T t);
//失败
public abstract void onFailure(Throwable e);
}
2. 异常处理
在实际的网络请求中有很多的异常信息和错误码，需要对这些信息要处理，在network包下新建一个errorhandler包，包下新建一个HttpErrorHandler类，代码如下：
/**
-
网络错误处理
-
@author llw
*/
public class HttpErrorHandler implements Function<Throwable, Observable> {
/**
-
处理以下两类网络错误：
-
1、http请求相关的错误，例如：404，403，socket timeout等等；
-
2、应用数据的错误会抛RuntimeException，最后也会走到这个函数来统一处理；
*/
@Override
public Observable apply(Throwable throwable) throws Exception {
//通过这个异常处理，得到用户可以知道的原因
return Observable.error(ExceptionHandle.handleException(throwable));
}
}
然后再在network包下创建一个ExceptionHandle类，代码如下：
/**
-
异常处理
-
@author llw
*/
public class ExceptionHandle {
//未授权
private static final int UNAUTHORIZED = 401;
//禁止的
private static final int FORBIDDEN = 403;
//未找到
private static final int NOT_FOUND = 404;
//请求超时
private static final int REQUEST_TIMEOUT = 408;
//内部服务器错误
private static final int INTERNAL_SERVER_ERROR = 500;
//错误网关
private static final int BAD_GATEWAY = 502;
//暂停服务
private static final int SERVICE_UNAVAILABLE = 503;
//网关超时
private static final int GATEWAY_TIMEOUT = 504;
/**
-
处理异常
-
@param throwable
-
@return
*/
public static ResponseThrowable handleException(Throwable throwable) {
//返回时抛出异常
ResponseThrowable responseThrowable;
if (throwable instanceof HttpException) {
HttpException httpException = (HttpException) throwable;
responseThrowable = new ResponseThrowable(throwable, ERROR.HTTP_ERROR);
switch (httpException.code()) {
case UNAUTHORIZED:
responseThrowable.message = "未授权";
break;
case FORBIDDEN:
responseThrowable.message = "禁止访问";
break;
case NOT_FOUND:
responseThrowable.message = "未找到";
break;
case REQUEST_TIMEOUT:
responseThrowable.message = "请求超时";
break;
case GATEWAY_TIMEOUT:
responseThrowable.message = "网关超时";
break;
case INTERNAL_SERVER_ERROR:
responseThrowable.message = "内部服务器错误";
break;
case BAD_GATEWAY:
responseThrowable.message = "错误网关";
break;
case SERVICE_UNAVAILABLE:
responseThrowable.message = "暂停服务";
break;
default:
responseThrowable.message = "网络错误";
break;
}
return responseThrowable;
} else if (throwable instanceof ServerException) {
//服务器异常
ServerException resultException = (ServerException) throwable;
responseThrowable = new ResponseThrowable(resultException, resultException.code);
responseThrowable.message = resultException.message;
return responseThrowable;
} else if (throwable instanceof JsonParseException
|| throwable instanceof JSONException
|| throwable instanceof ParseException) {
responseThrowable = new ResponseThrowable(throwable, ERROR.PARSE_ERROR);
responseThrowable.message = "解析错误";
return responseThrowable;
} else if (throwable instanceof ConnectException) {
responseThrowable = new ResponseThrowable(throwable, ERROR.NETWORK_ERROR);
responseThrowable.message = "连接失败";
return responseThrowable;
} else if (throwable instanceof javax.net.ssl.SSLHandshakeException) {
responseThrowable = new ResponseThrowable(throwable, ERROR.SSL_ERROR);
responseThrowable.message = "证书验证失败";
return responseThrowable;
} else if (throwable instanceof ConnectTimeoutException){
responseThrowable = new ResponseThrowable(throwable, ERROR.TIMEOUT_ERROR);
responseThrowable.message = "连接超时";
return responseThrowable;
} else if (throwable instanceof java.net.SocketTimeoutException) {
responseThrowable = new ResponseThrowable(throwable, ERROR.TIMEOUT_ERROR);
responseThrowable.message = "连接超时";
return responseThrowable;
}
else {
responseThrowable = new ResponseThrowable(throwable, ERROR.UNKNOWN);
responseThrowable.message = "未知错误";
return responseThrowable;
}
}
/**
- 约定异常
*/
public class ERROR {
/**
- 未知错误
*/
public static final int UNKNOWN = 1000;
/**
- 解析错误
*/
public static final int PARSE_ERROR = 1001;
/**
- 网络错误
*/
public static final int NETWORK_ERROR = 1002;
/**
- 协议出错
*/
public static final int HTTP_ERROR = 1003;
/**
- 证书出错
*/
public static final int SSL_ERROR = 1005;
/**
- 连接超时
*/
public static final int TIMEOUT_ERROR = 1006;
}
public static class ResponseThrowable extends Exception {
public int code;
public String message;
public ResponseThrowable(Throwable throwable, int code) {
super(throwable);
this.code = code;
}
}
public static class ServerException extends RuntimeException {
public int code;
public String message;
}
}
3. 拦截器
网络请求中拦截器的作用是比较大的，这里我们只做日志的打印。网络访问分为请求和返回两个部分，那么就对应两个拦截器。在network包下新建一个interceptor包，包下新建一个RequestInterceptor类，代码如下：
/**
-
请求拦截器
-
@author llw
*/
public class RequestInterceptor implements Interceptor {
/**
- 网络请求信息
*/
private INetworkRequiredInfo iNetworkRequiredInfo;
public RequestInterceptor(INetworkRequiredInfo iNetworkRequiredInfo){
this.iNetworkRequiredInfo = iNetworkRequiredInfo;
}
/**
- 拦截
*/
@Override
public Response intercept(Chain chain) throws IOException {
String nowDateTime = DateUtil.getDateTime();
//构建器
Request.Builder builder = chain.request().newBuilder();
//添加使用环境
builder.addHeader("os","android");
//添加版本号
builder.addHeader("appVersionCode",this.iNetworkRequiredInfo.getAppVersionCode());
//添加版本名
builder.addHeader("appVersionName",this.iNetworkRequiredInfo.getAppVersionName());
//添加日期时间
builder.addHeader("datetime",nowDateTime);
//返回
return chain.proceed(builder.build());
}
}
这里是简单的打印了一下，app的版本号和版本名，因为实际开发中，可能有多个版本在进行测试，这样可以帮助快速区分。
下面是返回拦截器，在interceptor包下新建一个ResponseInterceptor类，代码如下：
/**
-
返回拦截器(响应拦截器)
-
@author llw
*/
public class ResponseInterceptor implements Interceptor {
private static final String TAG = "ResponseInterceptor";
/**
- 拦截
*/
@Override
public Response intercept(Chain chain) throws IOException {
long requestTime = System.currentTimeMillis();
Response response = chain.proceed(chain.request());
KLog.i(TAG, "requestSpendTime=" + (System.currentTimeMillis() - requestTime) + "ms");
return response;
}
}
4. 网络请求服务
前面的3步操作都属于准备环节，核心的地方在这里，也就是创建网络服务，这里会将OKHttp、Retrofit、RxJava串起来，在network包下新建一个NetworkApi类，里面的代码如下：
/**
-
网络Api
-
@author llw
-
@description NetworkApi
*/
public class NetworkApi {
/**
- 获取APP运行状态及版本信息，用于日志打印
*/
private static INetworkRequiredInfo iNetworkRequiredInfo;
/**
- API访问地址
*/
private static final String BASE_URL = "cn.bing.com";
private static OkHttpClient okHttpClient;
private static final HashMap<String, Retrofit> retrofitHashMap = new HashMap<>();
/**
- 初始化
*/
public static void init(INetworkRequiredInfo networkRequiredInfo) {
iNetworkRequiredInfo = networkRequiredInfo;
}
/**
- 创建serviceClass的实例
*/
public static T createService(Class serviceClass) {
return getRetrofit(serviceClass).create(serviceClass);
}
/**
-
配置OkHttp
-
@return OkHttpClient
*/
private static OkHttpClient getOkHttpClient() {
//不为空则说明已经配置过了，直接返回即可。
if (okHttpClient == null) {
//OkHttp构建器
OkHttpClient.Builder builder = new OkHttpClient.Builder();
//设置缓存大小
int cacheSize = 100 * 1024 * 1024;
//设置网络请求超时时长，这里设置为6s
builder.connectTimeout(6, TimeUnit.SECONDS);
//添加请求拦截器，如果接口有请求头的话，可以放在这个拦截器里面
builder.addInterceptor(new RequestInterceptor(iNetworkRequiredInfo));
//添加返回拦截器，可用于查看接口的请求耗时，对于网络优化有帮助
builder.addInterceptor(new ResponseInterceptor());
//当程序在debug过程中则打印数据日志，方便调试用。
if (iNetworkRequiredInfo != null && iNetworkRequiredInfo.isDebug()) {
//iNetworkRequiredInfo不为空且处于debug状态下则初始化日志拦截器
HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor();
//设置要打印日志的内容等级，BODY为主要内容，还有BASIC、HEADERS、NONE。
httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
//将拦截器添加到OkHttp构建器中
builder.addInterceptor(httpLoggingInterceptor);
}
//OkHttp配置完成
okHttpClient = builder.build();
}
return okHttpClient;
}
/**
-
配置Retrofit
-
@param serviceClass 服务类
-
@return Retrofit
*/
private static Retrofit getRetrofit(Class serviceClass) {
if (retrofitHashMap.get(BASE_URL + serviceClass.getName()) != null) {
//刚才上面定义的Map中键是String，值是Retrofit，当键不为空时，必然有值，有值则直接返回。
return retrofitHashMap.get(BASE_URL + serviceClass.getName());
}
//初始化Retrofit Retrofit是对OKHttp的封装，通常是对网络请求做处理，也可以处理返回数据。
//Retrofit构建器
Retrofit.Builder builder = new Retrofit.Builder();
//设置访问地址
builder.baseUrl(BASE_URL);
//设置OkHttp客户端，传入上面写好的方法即可获得配置后的OkHttp客户端。
builder.client(getOkHttpClient());
//设置数据解析器 会自动把请求返回的结果（json字符串）通过Gson转化工厂自动转化成与其结构相符的实体Bean
builder.addConverterFactory(GsonConverterFactory.create());
//设置请求回调，使用RxJava 对网络返回进行处理
builder.addCallAdapterFactory(RxJava2CallAdapterFactory.create());
//retrofit配置完成
Retrofit retrofit = builder.build();
//放入Map中
retrofitHashMap.put(BASE_URL + serviceClass.getName(), retrofit);
//最后返回即可
return retrofit;
}
/**
-
配置RxJava 完成线程的切换
-
@param observer 这个observer要注意不要使用lifecycle中的Observer
-
@param 泛型
-
@return Observable
*/
public static ObservableTransformer<T, T> applySchedulers(final Observer observer) {
return upstream -> {
Observable observable = upstream
.subscribeOn(Schedulers.io())//线程订阅
.observeOn(AndroidSchedulers.mainThread())//观察Android主线程
.map(NetworkApi.getAppErrorHandler())//判断有没有500的错误，有则进入getAppErrorHandler
.onErrorResumeNext(new HttpErrorHandler<>());//判断有没有400的错误
//订阅观察者
observable.subscribe(observer);
return observable;
};
}
/**
- 错误码处理
*/
protected static Function<T, T> getAppErrorHandler() {
return response -> {
//当response返回出现500之类的错误时
if (response instanceof BaseResponse && ((BaseResponse) response).responseCode >= 500) {
//通过这个异常处理，得到用户可以知道的原因
ExceptionHandle.ServerException exception = new ExceptionHandle.ServerException();
exception.code = ((BaseResponse) response).responseCode;
exception.message = ((BaseResponse) response).responseError != null ? ((BaseResponse) response).responseError : "";
throw exception;
}
return response;
};
}
}
网络框架就构建完成了，network包内容如下图所示：
这个网络框架在使用前需要先进行初始化，后面有使用的实例，代码中的注释应该是很明白了，总的来说就是一个思路，OkHttp做底层的网络访问，Retrofit做上层网络请求接口的封装，同时将需要的数据解析成实体，同时Retrofit还有对RxJava的支持，这样就可以在请求的时候做线程切换，切换到子线程，在数据返回的时候切换到主线程。避免了在主线程中进行耗时操作的问题。因此那么多人说Retrofit强大是有原因的。因为你不会看到有人直接拿OKHttp + Rxjava进行使用而跳过Retrofit的。所以这个组合使用是有其道理在里面的。对于任何不了解的事情，都不要急着下结论。
网络框架搭建好了，下面也要能够使用才行对吧，这里我通过访问必应的每日一图来作为演示，必应每日一图的访问地址如下所示：
不管拿到任何API接口都要先进行一次测试，这是对自己负责，不过过于相信别人，否则你会吃亏的。
通过浏览器访问得到返回结果，然后我们通过返回的数据构建一个实体Bean。
1. 创建返回实体
在model包下新建一个BiYingResponse类，代码如下：
/**
-
必应访问接口返回数据实体
-
@author llw
-
@description BiYingImgResponse
*/
public class BiYingResponse {
private TooltipsBean tooltips;
private List images;
public TooltipsBean getTooltips() {
return tooltips;
}
public void setTooltips(TooltipsBean tooltips) {
this.tooltips = tooltips;
}
public List getImages() {
return images;
}
public void setImages(List images) {
this.images = images;
}
public static class TooltipsBean {
private String loading;
private String previous;
private String next;
private String walle;
private String walls;
public String getLoading() {
return loading;
}
public void setLoading(String loading) {
this.loading = loading;
}
public String getPrevious() {
return previous;
}
public void setPrevious(String previous) {
this.previous = previous;
}
public String getNext() {
return next;
}
public void setNext(String next) {
this.next = next;
}
public String getWalle() {
return walle;
}
public void setWalle(String walle) {
this.walle = walle;
}
public String getWalls() {
return walls;
}
public void setWalls(String walls) {
this.walls = walls;
}
}
public static class ImagesBean {
private String startdate;
private String fullstartdate;
private String enddate;
private String url;
private String urlbase;
private String copyright;
private String copyrightlink;
private String title;
private String quiz;
private boolean wp;
private String hsh;
private int drk;
private int top;
private int bot;
private List<?> hs;
public String getStartdate() {
return startdate;
}
public void setStartdate(String startdate) {
this.startdate = startdate;
}
public String getFullstartdate() {
return fullstartdate;
}
public void setFullstartdate(String fullstartdate) {
this.fullstartdate = fullstartdate;
}
public String getEnddate() {
return enddate;
}
public void setEnddate(String enddate) {
this.enddate = enddate;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public String getUrlbase() {
return urlbase;
}
public void setUrlbase(String urlbase) {
this.urlbase = urlbase;
}
public String getCopyright() {
return copyright;
}
public void setCopyright(String copyright) {
this.copyright = copyright;
}
public String getCopyrightlink() {
return copyrightlink;
}
public void setCopyrightlink(String copyrightlink) {
this.copyrightlink = copyrightlink;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getQuiz() {
return quiz;
}
public void setQuiz(String quiz) {
this.quiz = quiz;
}
public boolean isWp() {
return wp;
}
public void setWp(boolean wp) {
this.wp = wp;
}
public String getHsh() {
return hsh;
}
public void setHsh(String hsh) {
this.hsh = hsh;
}
public int getDrk() {
return drk;
}
public void setDrk(int drk) {
this.drk = drk;
}
public int getTop() {
return top;
}
public void setTop(int top) {
this.top = top;
}
public int getBot() {
return bot;
}
public void setBot(int bot) {
this.bot = bot;
}
public List<?> getHs() {
return hs;
}
public void setHs(List<?> hs) {
this.hs = hs;
}
}
}
总结
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【Android高级架构师系统学习资料】高级架构师进阶必备——设计思想解读开源框架
第一章、热修复设计 第二章、插件化框架设计 第三章、组件化框架设计 第四章、图片加载框架 第五章、网络访问框架设计 第六章、RXJava 响应式编程框架设计 第七章、IOC 架构设计 第八章、Android 架构组件 Jetpack
