OkHttp的二次封装

来源：互联网发布：nba湖人英格拉姆数据编辑：程序博客网时间：2024/06/04 19:53

public class OkHttp3Util {
/**
* 懒汉安全加同步
* 私有的静态成员变量只声明不创建
* 私有的构造方法
* 提供返回实例的静态方法
*/
private static OkHttpClient okHttpClient = null;
private OkHttp3Util() {
}
public static OkHttpClient getInstance() {
if (okHttpClient == null) {
//加同步安全
synchronized (OkHttp3Util.class) {
if (okHttpClient == null) {
//okhttp可以缓存数据....指定缓存路径
File sdcache = new File(Environment.getExternalStorageDirectory(), "cache");
//指定缓存大小
int cacheSize = 10 * 1024 * 1024;
okHttpClient = new OkHttpClient.Builder()//构建器
.connectTimeout(15, TimeUnit.SECONDS)//连接超时
.writeTimeout(20, TimeUnit.SECONDS)//写入超时
.readTimeout(20, TimeUnit.SECONDS)//读取超时
//.addInterceptor(new CommonParamsInterceptor())//添加的是应用拦截器...公共参数
//.addNetworkInterceptor(new CacheInterceptor())//添加的网络拦截器
.cache(new Cache(sdcache.getAbsoluteFile(), cacheSize))//设置缓存
.build();
}
}
}
return okHttpClient;
}
/**
* get请求
* 参数1 url
* 参数2 回调Callback
*/
public static void doGet(String oldUrl, Callback callback) {
//要添加的公共参数...map
Map<String,String> map = new HashMap<>();
map.put("source","android");
StringBuilder stringBuilder = new StringBuilder();//创建一个stringBuilder
stringBuilder.append(oldUrl);
if (oldUrl.contains("?")){
//?在最后面....2类型
if (oldUrl.indexOf("?") == oldUrl.length()-1){
}else {
//3类型...拼接上&
stringBuilder.append("&");
}
}else {
//不包含? 属于1类型,,,先拼接上?号
stringBuilder.append("?");
}
//添加公共参数....
for (Map.Entry<String,String> entry: map.entrySet()) {
//拼接
stringBuilder.append(entry.getKey())
.append("=")
.append(entry.getValue())
.append("&");
}
//删掉最后一个&符号
if (stringBuilder.indexOf("&") != -1){
stringBuilder.deleteCharAt(stringBuilder.lastIndexOf("&"));
}
String newUrl = stringBuilder.toString();//新的路径
//创建OkHttpClient请求对象
OkHttpClient okHttpClient = getInstance();
//创建Request
Request request = new Request.Builder().url(newUrl).build();
//得到Call对象
Call call = okHttpClient.newCall(request);
//执行异步请求
call.enqueue(callback);
}
/**
* post请求
* 参数1 url
* 参数2 Map<String, String> params post请求的时候给服务器传的数据
* add..("","")
* add()
*/
public static void doPost(String url, Map<String, String> params, Callback callback) {
//要添加的公共参数...map
Map<String,String> map = new HashMap<>();
map.put("source","android");
//创建OkHttpClient请求对象
OkHttpClient okHttpClient = getInstance();
//3.x版本post请求换成FormBody 封装键值对参数
FormBody.Builder builder = new FormBody.Builder();
//遍历集合
for (String key : params.keySet()) {
builder.add(key, params.get(key));
}
//添加公共参数
for (Map.Entry<String,String> entry: map.entrySet()) {
builder.add(entry.getKey(),entry.getValue());
}
//创建Request
Request request = new Request.Builder().url(url).post(builder.build()).build();
Call call = okHttpClient.newCall(request);
call.enqueue(callback);
}
/**
* post请求上传文件....包括图片....流的形式传任意文件...
* 参数1 url
* file表示上传的文件
* fileName....文件的名字,,例如aaa.jpg
* params ....传递除了file文件其他的参数放到map集合
*
*/
public static void uploadFile(String url, File file, String fileName,Map<String,String> params) {
//创建OkHttpClient请求对象
OkHttpClient okHttpClient = getInstance();
MultipartBody.Builder builder = new MultipartBody.Builder();
builder.setType(MultipartBody.FORM);
//参数
if (params != null){
for (String key : params.keySet()){
builder.addFormDataPart(key,params.get(key));
}
}
//文件...参数name指的是请求路径中所接受的参数...如果路径接收参数键值是fileeeee,此处应该改变
builder.addFormDataPart("file",fileName,RequestBody.create(MediaType.parse("application/octet-stream"),file));
//构建
MultipartBody multipartBody = builder.build();
//创建Request
Request request = new Request.Builder().url(url).post(multipartBody).build();
//得到Call
Call call = okHttpClient.newCall(request);
//执行请求
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.e("upload",e.getLocalizedMessage());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
//上传成功回调目前不需要处理
if (response.isSuccessful()){
String s = response.body().string();
Log.e("upload","上传--"+s);
}
}
});
}
/**
* Post请求发送JSON数据....{"name":"zhangsan","pwd":"123456"}
* 参数一：请求Url
* 参数二：请求的JSON
* 参数三：请求回调
*/
public static void doPostJson(String url, String jsonParams, Callback callback) {
RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), jsonParams);
Request request = new Request.Builder().url(url).post(requestBody).build();
Call call = getInstance().newCall(request);
call.enqueue(callback);
}
/**
* 下载文件以流的形式把apk写入的指定文件得到file后进行安装
* 参数er：请求Url
* 参数san：保存文件的文件夹....download
*/
public static void download(final Activity context, final String url, final String saveDir) {
Request request = new Request.Builder().url(url).build();
Call call = getInstance().newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
//com.orhanobut.logger.Logger.e(e.getLocalizedMessage());
}
@Override
public void onResponse(Call call, final Response response) throws IOException {
InputStream is = null;
byte[] buf = new byte[2048];
int len = 0;
FileOutputStream fos = null;
try {
is = response.body().byteStream();//以字节流的形式拿回响应实体内容
//apk保存路径
final String fileDir = isExistDir(saveDir);
//文件
File file = new File(fileDir, getNameFromUrl(url));
fos = new FileOutputStream(file);
while ((len = is.read(buf)) != -1) {
fos.write(buf, 0, len);
}
fos.flush();
context.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(context, "下载成功:" + fileDir + "," + getNameFromUrl(url), Toast.LENGTH_SHORT).show();
}
});
//apk下载完成后调用系统的安装方法
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
context.startActivity(intent);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (is != null) is.close();
if (fos != null) fos.close();
}
}
});
}
/**
* 判断下载目录是否存在......并返回绝对路径
*
* @param saveDir
* @return
* @throws IOException
*/
public static String isExistDir(String saveDir) throws IOException {
// 下载位置
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
File downloadFile = new File(Environment.getExternalStorageDirectory(), saveDir);
if (!downloadFile.mkdirs()) {
downloadFile.createNewFile();
}
String savePath = downloadFile.getAbsolutePath();
Log.e("savePath", savePath);
return savePath;
}
return null;
}
/**
* @param url
* @return 从下载连接中解析出文件名
*/
private static String getNameFromUrl(String url) {
return url.substring(url.lastIndexOf("/") + 1);
}
/**
* 公共参数拦截器
*/
private static class CommonParamsInterceptor implements Interceptor{
//拦截的方法
@Override
public Response intercept(Chain chain) throws IOException {
//获取到请求
Request request = chain.request();
//获取请求的方式
String method = request.method();
//获取请求的路径
String oldUrl = request.url().toString();
Log.e("---拦截器",request.url()+"---"+request.method()+"--"+request.header("User-agent"));
//要添加的公共参数...map
Map<String,String> map = new HashMap<>();
map.put("source","android");
if ("GET".equals(method)){
// 1.http://www.baoidu.com/login --------？ key=value&key=value
// 2.http://www.baoidu.com/login? --------- key=value&key=value
// 3.http://www.baoidu.com/login?mobile=11111 -----&key=value&key=value
StringBuilder stringBuilder = new StringBuilder();//创建一个stringBuilder
stringBuilder.append(oldUrl);
if (oldUrl.contains("?")){
//?在最后面....2类型
if (oldUrl.indexOf("?") == oldUrl.length()-1){
}else {
//3类型...拼接上&
stringBuilder.append("&");
}
}else {
//不包含? 属于1类型,,,先拼接上?号
stringBuilder.append("?");
}
//添加公共参数....
for (Map.Entry<String,String> entry: map.entrySet()) {
//拼接
stringBuilder.append(entry.getKey())
.append("=")
.append(entry.getValue())
.append("&");
}
//删掉最后一个&符号
if (stringBuilder.indexOf("&") != -1){
stringBuilder.deleteCharAt(stringBuilder.lastIndexOf("&"));
}
String newUrl = stringBuilder.toString();//新的路径
//拿着新的路径重新构建请求
request = request.newBuilder()
.url(newUrl)
.build();
}else if ("POST".equals(method)){
//先获取到老的请求的实体内容
RequestBody oldRequestBody = request.body();//....之前的请求参数,,,需要放到新的请求实体内容中去
//如果请求调用的是上面doPost方法
if (oldRequestBody instanceof FormBody){
FormBody oldBody = (FormBody) oldRequestBody;
//构建一个新的请求实体内容
FormBody.Builder builder = new FormBody.Builder();
//1.添加老的参数
for (int i=0;i<oldBody.size();i++){
builder.add(oldBody.name(i),oldBody.value(i));
}
//2.添加公共参数
for (Map.Entry<String,String> entry:map.entrySet()) {
builder.add(entry.getKey(),entry.getValue());
}
FormBody newBody = builder.build();//新的请求实体内容
//构建一个新的请求
request = request.newBuilder()
.url(oldUrl)
.post(newBody)
.build();
}
}
Response response = chain.proceed(request);
return response;
}
}
/**
* 网络缓存的拦截器......注意在这里更改cache-control头是很危险的,一般客户端不进行更改,,,,服务器端直接指定
*
* 没网络取缓存的时候,一般都是在数据库或者sharedPerfernce中取出来的
*
*
*
*/
/*private static class CacheInterceptor implements Interceptor{
@Override
public Response intercept(Chain chain) throws IOException {
//老的响应
Response oldResponse = chain.proceed(chain.request());
*//*if (NetUtils.isNetworkConnected(DashApplication.getAppContext())){
int maxAge = 120; // 在线缓存在2分钟内可读取
return oldResponse.newBuilder()
.removeHeader("Pragma")
.removeHeader("Cache-Control")
.header("Cache-Control", "public, max-age=" + maxAge)
.build();
}else {
int maxStale = 60 * 60 * 24 * 14; // 离线时缓存保存2周
return oldResponse.newBuilder()
.removeHeader("Pragma")
.removeHeader("Cache-Control")
.header("Cache-Control", "public, only-if-cached, max-stale=" + maxStale)
.build();
}*//*
}
}*/
}

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