public class OkHttpUtils {
/**
* 懒汉 安全 加同步
* 1.私有的静态成员变量 只声明不创建
* 2.私有的构造方法
* 3.提供返回实例的静态方法
*/
private static OkHttpClient okHttpClient = null;
private OkHttpUtils() {
}
public static OkHttpClient getInstance() {
if (okHttpClient == null) { //加同步安全
synchronized (OkHttpUtils.class) {
if (okHttpClient == null) { //okhttp可以缓存数据....指定缓存路径
okHttpClient = new OkHttpClient.Builder()//构建器
.proxy(Proxy.NO_PROXY) //来屏蔽系统代理
.connectTimeout(10, TimeUnit.SECONDS)//连接超时
.writeTimeout(10, TimeUnit.SECONDS)//写入超时
.readTimeout(10, TimeUnit.SECONDS)//读取超时
.addInterceptor(new CommonParamsInterceptor())//添加应用拦截器的方法
.build();
}
}
}
return okHttpClient;
}
/**
* 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, Callback callback) { //创建OkHttpClient请求对象
OkHttpClient okHttpClient = getInstance(); //MultipartBody多功能的请求实体对象,,,formBody只能传表单形式的数据
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(callback);
}
/**
* 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
* saveDir：保存文件的文件夹....download
*/
public static void download(final String url, final String saveDir, OnDownloadListener downloadListener) { //get请求
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) {
}
@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 {
//response.body().string()...json限制是1M大小...byteStream()流的方式
is = response.body().byteStream();//以字节流的形式拿回响应实体内容
AppLog.e(getClass(), "read file length--->" + is.available());
long total = response.body().contentLength();
//保存路径
final String fileDir = isExistDir(saveDir);
File file = new File(fileDir, getNameFromUrl(url));
fos = new FileOutputStream(file);
long sum = 0;
while ((len = is.read(buf)) != -1) {
fos.write(buf, 0, len);
sum += len;
int progress = (int) (sum * 1.0f / total * 100);
downloadListener.onDownloading(progress);
}
fos.flush();
AppLog.e(getClass(), "down load over");
downloadListener.onDownloadSuccess(fileDir + "/" + getNameFromUrl(url));
} catch (IOException e) {
downloadListener.onDownloadFailed();
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();
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);
}
/**
* 封装公共参数的拦截器
*/
private static class CommonParamsInterceptor implements Interceptor { //intercept方法就是拦截的意思....拦截的是一个请求,,,一旦拦截之后可以对请求的参数进行处理
//Chain chain 链条的意思
@Override
public Response intercept(Chain chain) throws IOException {
Log.e("----", "拦截器------"); //调用request()方法得到拦截的请求
Request request = chain.request(); //获取请求的方式
String method = request.method();//GET POST
//拦截的请求的路径
String oldUrl = request.url().toString(); //要添加的公共参数...map
Map<String, String> map = new HashMap<>();
map.put("source", "android");
if ("GET".equals(method)) {
StringBuilder stringBuilder = new StringBuilder();//创建一个stringBuilder...字符串缓冲区
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....source=android&appVersion=100&
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("&"));
} //得到含有公共参数的新路径.....使用新路径去请求
String newUrl = stringBuilder.toString(); //新的路径构建一个新的请求
request = request.newBuilder().url(newUrl).build();
} else if ("POST".equals(method)) {
Log.e("--oldUrl--", oldUrl); //参数在请求的实体内容上....拿到以前的参数,把以前的参数和公共参数全都添加到请求实体上
RequestBody requestBody = request.body();
if (requestBody instanceof FormBody) {//前边是不是后边的子类/实例对象
FormBody oldBody = (FormBody) requestBody;//keywords...page
FormBody.Builder builder = new FormBody.Builder(); //先添加之前的参数
for (int i = 0; i < oldBody.size(); i++) { //键值对的形式添加
builder.add(oldBody.name(i), oldBody.value(i));
} //添加公共参数
for (Map.Entry<String, String> entry : map.entrySet()) {
builder.add(entry.getKey(), entry.getValue());
} //构建一个新的请求
request = request.newBuilder().url(oldUrl).post(builder.build()).build();
}
} //执行请求 获取到响应
Response response = chain.proceed(request);
return response;
}
}
}
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