okhttp实战使用详解

我是把okhttp封装起来了，然后调用了，下面我直接把代码粘贴出来，直接用就可以了。
首先我把这个封装的东西放在一个单独的包里。

再看看里面写的都是什么吧

/** * Created by yzx on 2017/7/1 */public class CancelAble {    Call call;    public void cancel(){        if(call != null){            call.cancel();            call = null;        }    }}

/** *  封装的okhttp 2017/7/1 */public class OKClient {    private final OkHttpClient client;    private final Handler mHandler = new Handler(Looper.getMainLooper());    private final ArrayList<WeakReference<CancelAble>> callList = new ArrayList<>(0);    public OKClient(OkHttpClient client){        this.client = client;    }    /*=================== method======================*/    public CancelAble get(String url , RequestParam params , OKRequestCallback callback){        cleanCancelAbleList();        String queryString = params == null?"":params.getQueryString();        Request request = new Request.Builder().url(url+queryString).get().build();        CancelAble cancelAble = new CancelAble();        cancelAble.call = client.newCall(request);        callList.add(new WeakReference<>(cancelAble));        execCallback(cancelAble.call,callback);        return cancelAble;    }    public CancelAble post(String url,RequestParam params , OKRequestCallback callback){        cleanCancelAbleList();        Request request = (params != null && params.hasFile()) ? getFilePostRequest(url,params) : getStringPostRequest(url,params);        CancelAble cancelAble = new CancelAble();        cancelAble.call = client.newCall(request);        callList.add(new WeakReference<>(cancelAble));        execCallback(cancelAble.call , callback);        return cancelAble;    }    public CancelAble download(String url ,final File targetFile , boolean goon,final OKDownLoadCallback callback){        cleanCancelAbleList();        String rangeHeaderValue = null;        if(goon && Util.isFileUseful(targetFile)){            rangeHeaderValue = "bytes="+targetFile.length()+"-";        } else {            targetFile.delete();            goon = false;        }        final long hasDownLen = goon ? targetFile.length() : 0;        Request.Builder builder = new Request.Builder().url(url).get();        if(goon) builder.addHeader("Range", rangeHeaderValue);        CancelAble cancelAble = new CancelAble();        cancelAble.call = client.newCall(builder.build());        callList.add(new WeakReference<>(cancelAble));        cancelAble.call.enqueue(new Callback() {            public void onResponse(Call call, Response response) throws IOException {                if(call.isCanceled()) return ;                if(response.isSuccessful()){                    long total;                    try{ total = Long.parseLong(response.header("Content-Length")); }                    catch (Exception e){ total = 0; }                    BufferedInputStream in = new BufferedInputStream(response.body().byteStream());                    byte[] buffer = new byte[1024*8];                    long hasWriteLen = hasDownLen;                    int len;                    RandomAccessFile out = new RandomAccessFile(targetFile, "rwd");                    out.skipBytes((int)hasWriteLen);                    long lastPublishTime = System.currentTimeMillis() - 334;                    while((len = in.read(buffer)) != -1) {                        out.write(buffer, 0, len);                        hasWriteLen += len;                        long now;                        if((now = System.currentTimeMillis()) - lastPublishTime > 333){                            publishProgress(callback,total,hasWriteLen);                            lastPublishTime = now;                        }                    }                    publishProgress(callback,total,total);                    in.close();                    out.close();                    mHandler.post(new Runnable() {                        public void run() {                            callback.onComplete(targetFile);                        }                    });                }else                    mHandler.post(new Runnable() {                        public void run() {                            callback.onError(OKDownLoadCallback.ERROR_NET);                        }                    });            }            public void onFailure(Call call, IOException e) {                if(call.isCanceled()) return ;                mHandler.post(new Runnable() {                    public void run() {                        callback.onError(OKDownLoadCallback.ERROR_SDCARD);                    }                });            }        });        return cancelAble;    }    public void cancelAll(){        for (WeakReference<CancelAble> item : callList)            if(item.get()!=null)                item.get().cancel();        callList.clear();    }    /*=================== internal======================*/    private void publishProgress(final OKDownLoadCallback callback, final long total , final long current){            mHandler.post(new Runnable() {                public void run() {                    try{                        int p = (int)(1000 * current / total);                        callback.onProgress(p >1000 ? 1000 : (p <0 ? 0 : p));                    } catch(Exception e){ callback.onProgress(1000); }                }            });    }    private void cleanCancelAbleList(){        if(callList.size() <= client.dispatcher().getMaxRequests())            return ;        ArrayList<WeakReference> readyRemoveList = new ArrayList<>(callList.size());        for (WeakReference<CancelAble> item : callList)            if(item.get() == null)                readyRemoveList.add(item);        callList.removeAll(readyRemoveList);    }    private Request getFilePostRequest(String url,RequestParam params){        final MultipartBody.Builder builder = new MultipartBody.Builder("ook------------------------------------------ook").setType(MultipartBody.FORM);        params.iteratorString(new RequestParam.KeyValueIteratorListener() {            public void onIterator(String key, String value) {              builder.addFormDataPart(key,value);            }        });        params.iteratorFile(new RequestParam.KeyFileIteratorListener() {            public void onIterator(String key, File file) {               builder.addFormDataPart(key,file.getName(),                       RequestBody.create(MediaType.parse("application/octet-stream") , file));            }        });        return new Request.Builder().url(url).post(builder.build()).build();    }    private Request getStringPostRequest(String url,RequestParam params){        final FormBody.Builder builder = new FormBody.Builder();        if(params != null)            params.iteratorString(new RequestParam.KeyValueIteratorListener() {                public void onIterator(String key, String value) {                    builder.add(key,value);                }            });        return new Request.Builder().url(url).post(builder.build()).build();    }    private void execCallback(Call call,final OKRequestCallback callback){        call.enqueue(new Callback() {            public void onResponse(Call call, Response response) throws IOException {                if(callback == null) return ;                if(call.isCanceled())  return ;                final boolean isSuccess = response.isSuccessful();                final String bodyString = response.body().string();                final int code = response.code();                mHandler.post(new Runnable() {                    public void run() {                        if(isSuccess){                            try {                                callback.onSuccess(bodyString);                            } catch (JSONException e) {                                e.printStackTrace();                            }                        }                        else  callback.onFailure(code);                    }                });            }            public void onFailure(Call call, IOException e) {                if(callback == null) return ;                if(call.isCanceled()) return ;                mHandler.post(new Runnable() {                    public void run() {                        callback.onFailure(0);                    }                });            }        });    }}

/** * Created by yzx on 2016/9/1 */public interface OKDownLoadCallback {     int ERROR_SDCARD = 1;     int ERROR_NET = 2;    void onComplete(File file);    void onError(int errCode);    void onProgress(int current); //0 - 1000}

package com.example.xu.hyoa.httputil;import org.json.JSONException;/** * Created by yzx on 2017/7/1 */public interface OKRequestCallback {    void onSuccess(String data) throws JSONException;    void onFailure(int httpCode);}

/** * Created by yzx on 2017/7/1 */public class RequestParam {    private final HashMap<String,List<String>> stringMap = new HashMap<>(0);    private final ArrayList<FileWrapper> fileList = new ArrayList<>(0);    /**     *添加string参数,key可以重复,重复则按照array参数处理     */    public void add(String key,String value){        List<String> pv = stringMap.get(key);        if(pv == null)            stringMap.put(key, pv = new ArrayList<>(1));        pv.add(value);    }    /**     * 添加文件参数     */    public void addFile(String key , File file){        if(Util.isFileUseful(file))            fileList.add(new FileWrapper(file,key));    }    /* ==========================internal========================== */    /* internal */    String getQueryString(){        if(stringMap.isEmpty())            return "";        final StringBuilder sb = new StringBuilder("?");        iteratorString(new KeyValueIteratorListener() {            public void onIterator(String key, String value) {                sb.append(key).append("=").append(value).append("&");            }        });        if(sb.length() == 1) sb.deleteCharAt(0);        else sb.deleteCharAt(sb.length()-1);        return sb.toString();    }    /* is upload file */    boolean hasFile(){        return !fileList.isEmpty();    }    /* iterate string params */    void iteratorString(KeyValueIteratorListener iteratorListener){        if(iteratorListener != null && !stringMap.isEmpty())            for (Map.Entry<String, List<String>> entry : stringMap.entrySet())                for (String item : ((entry.getValue() != null) ?entry.getValue() : new ArrayList<String>(0)))                    iteratorListener.onIterator(entry.getKey() , item);    }    /* iterator file params */    void iteratorFile(KeyFileIteratorListener iteratorListener){        if(iteratorListener == null || fileList.isEmpty())            return;        for (FileWrapper item : fileList)            iteratorListener.onIterator(item.key,item.file);    }    /* ============================class============================ */    interface KeyFileIteratorListener{        void onIterator(String key, File file);    }    interface KeyValueIteratorListener{        void onIterator(String key, String value);    }    class FileWrapper{        public FileWrapper(File file,String key){this.file=file;this.key=key;}        File file;        String key;    }}

/** * Created by yzx on 2017/7/71 */ class Util {    static boolean isFileUseful(File file){            return file != null && file.exists() && file.canRead() && !file.isDirectory();    }}

到这里封装的okhttp就完事了，然后使用方法

在那个类里用 需要先声明
声明一下，把下面复制就好了。

private OKClient client = new OKClient(new OkHttpClient());

get 请求

 /* get 请求 */ //url   *****这是请求接口    public void get(View view){        RequestParam param = new RequestParam();        param.add("fuck","fuck1");        param.add("fuck","fuck2");//这是参数        /* 这个CancelAble对象, 可以实现本次请求的取消  -> cancelAble.cancel() */        CancelAble cancelAble = client.get(url, param, new OKRequestCallback() {            public void onSuccess(String data) {                Log.e("data",data);            }            public void onFailure(int httpCode) {                Toast.makeText(MainActivity.this, "" + httpCode, Toast.LENGTH_SHORT).show();            }        });    }

post 请求

   /* post 请求 */    public void post(View view){        RequestParam param = new RequestParam();        param.add("pjlx","0");//岗位id        CancelAble cancelAble = client.post(sds, param, new OKRequestCallback() {            public void onSuccess(String data) {                Toast.makeText(MainActivity.this, data, Toast.LENGTH_SHORT).show();                Log.e("data",data);            }            public void onFailure(int httpCode) {                Toast.makeText(MainActivity.this, "" + httpCode+"", Toast.LENGTH_SHORT).show();                Log.e("httpCode"," "+httpCode);            }        });    }

上传文件

    /**     *  上传文件     *  */    public void postFile(View view){        RequestParam param = new RequestParam();        File file=new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/a.jpg");        param.addFile("fileOptions.file",file);        Log.e("aaa",file.toString()+"");        Log.e("ddd",file.exists()+"");        CancelAble cancelAble = client.post(url, param, new OKRequestCallback() {            public void onSuccess(String data) {                Toast.makeText(MainActivity.this, data, Toast.LENGTH_SHORT).show();                Log.e("data",data);            }            public void onFailure(int httpCode) {                Log.e("httpCode",""+httpCode);                Toast.makeText(MainActivity.this, httpCode+"", Toast.LENGTH_SHORT).show();            }        });    }

下载

 /* 下载 */    public void download(View view){        final TextView tv = (TextView) view;        String ren ="yumi";        String url = "http://pic.qiantucdn.com/58pic/19/94/04/91U58PICT89_1024.jpg";        File file=new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/"+ren+".jpg");        while(file.exists()){            i++;            ren="yumi"+"("+i+")";            file=null;            file=new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/"+ren+".jpg");        }        client.download(url, file                , true /* 这个参数表示是否断线续传 */                , new OKDownLoadCallback() {                        public void onComplete(File file) {                            Toast.makeText(MainActivity.this, "over", Toast.LENGTH_SHORT).show();                        }                        public void onError(int errCode) {                            Toast.makeText(MainActivity.this, "error : "+ errCode , Toast.LENGTH_SHORT).show();                        }                        public void onProgress(int current) {                                tv.setText(current+"");                        }        });    }

以上汇报完毕，你最好包不要复制，不然会出错。