安卓HTTPutils封装

package com.dash.a1511n.util;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Environment;
import android.util.Log;
import android.widget.Toast;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import okhttp3.Cache;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.Interceptor;
import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

/**
* Created by Dash on 2017/12/8.
*
* 公共参数封装分为两种方式....source=android,,,appVersion=100
* 一:封装到doGet和doPost方法中
*
*
* 二:封装到拦截器(interceptor):拦截一个请求,然后添加参数进去
*/
public class OkHttp3Util_03 {

/**
* 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 OkHttp3Util_03() {
}

public static OkHttpClient getInstance() {

if (okHttpClient == null) {
//加同步安全
synchronized (OkHttp3Util_03.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())//添加应用拦截器的方法

.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
*
* oldUrl表示老的地址,,,是没封装公共参数之前的地址....公共参数指的是source=android
*
*/

public static void doGet(String oldUrl, Callback callback) {

//创建OkHttpClient请求对象
OkHttpClient okHttpClient = getInstance();
//创建Request
Request request = new Request.Builder().url(oldUrl).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) {

//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,,,map集合遍历方式
for (String key : params.keySet()) {
builder.add(key, params.get(key));

}

//创建Request....formBody...new formBody.Builder()...add()....build()
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,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
* 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) {
//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) {
//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 {
//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
//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......覆盖安装,,,只有包名和签名的应用,并且版本和版本号升级后的才能安装
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);
}

/**
* 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;
}
}

}

//这样调用

private void getOk() {
       OkHttp3Util_03.doGet(path, new Callback() {
           @Override
           public void onFailure(Call call, IOException e) {

           }

           @Override
           public void onResponse(Call call, final Response response) throws IOException {
                         if (response.isSuccessful()){
                             final String json  = response.body().string();
                             runOnUiThread(new Runnable() {
                                 @Override
                                 public void run() {

                                     Bean bean = new Gson().fromJson(json, Bean.class);
                                     List<Bean.DataBean> data = bean.getData();

                                     mRlv.setLayoutManager(new LinearLayoutManager(MainActivity.this, OrientationHelper.VERTICAL, false));
                                     adapter = new recyclerviewAdapter(MainActivity.this,data);


                                     mRlv.setAdapter(adapter);
                                     setadapter();
                                 }
                             });



                         }
           }
       });
}

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