Android okHttp網路請求之檔案上傳下載

前言：

   前面介紹了基於okHttp的get、post基本使用（http://www.cnblogs.com/whoislcj/p/5526431.html），今天來實現一下基於okHttp的檔案上傳、下載。

     okHttp相關文章地址：

• Android okHttp網路請求之Get/Post請求
• Android okHttp網路請求之檔案上傳下載
• Android okHttp網路請求之Json解析
• Android okHttp網路請求之快取控制Cache-Control
• Android okHttp網路請求之Retrofit+Okhttp組合

檔案上傳：

1.）不帶引數上傳檔案

    /**
     * 上傳檔案
     * @param actionUrl 介面地址
     * @param filePath  本地檔案地址
     */
    public <T> void upLoadFile(String actionUrl, String filePath, final ReqCallBack<T> callBack) {
        //補全請求地址
        String requestUrl = String.format("%s/%s", BASE_URL, actionUrl);
        //建立File
        File file = new File(filePath);
        //建立RequestBody
        RequestBody body = RequestBody.create(MEDIA_OBJECT_STREAM, file);
        //建立Request
        final Request request = new Request.Builder().url(requestUrl).post(body).build();
        final Call call = mOkHttpClient.newBuilder().writeTimeout(50, TimeUnit.SECONDS).build().newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                Log.e(TAG, e.toString());
                failedCallBack("上傳失敗", callBack);
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                if (response.isSuccessful()) {
                    String string = response.body().string();
                    Log.e(TAG, "response ----->" + string);
                    successCallBack((T) string, callBack);
                } else {
                    failedCallBack("上傳失敗", callBack);
                }
            }
        });
    }

2.）帶引數上傳檔案

/**
     *上傳檔案
     * @param actionUrl 介面地址
     * @param paramsMap 引數
     * @param callBack 回撥
     * @param <T>
     */
    public <T>void upLoadFile(String actionUrl, HashMap<String, Object> paramsMap, final ReqCallBack<T> callBack) {
        try {
            //補全請求地址
            String requestUrl = String.format("%s/%s", upload_head, actionUrl);
            MultipartBody.Builder builder = new MultipartBody.Builder();
            //設定型別
            builder.setType(MultipartBody.FORM);
            //追加引數
            for (String key : paramsMap.keySet()) {
                Object object = paramsMap.get(key);
                if (!(object instanceof File)) {
                    builder.addFormDataPart(key, object.toString());
                } else {
                    File file = (File) object;
                    builder.addFormDataPart(key, file.getName(), RequestBody.create(null, file));
                }
            }
            //建立RequestBody
            RequestBody body = builder.build();
            //建立Request
            final Request request = new Request.Builder().url(requestUrl).post(body).build();
            //單獨設定引數 比如讀取超時時間
            final Call call = mOkHttpClient.newBuilder().writeTimeout(50, TimeUnit.SECONDS).build().newCall(request);
            call.enqueue(new Callback() {
                @Override
                public void onFailure(Call call, IOException e) {
                    Log.e(TAG, e.toString());
                    failedCallBack("上傳失敗", callBack);
                }

                @Override
                public void onResponse(Call call, Response response) throws IOException {
                    if (response.isSuccessful()) {
                        String string = response.body().string();
                        Log.e(TAG, "response ----->" + string);
                        successCallBack((T) string, callBack);
                    } else {
                        failedCallBack("上傳失敗", callBack);
                    }
                }
            });
        } catch (Exception e) {
            Log.e(TAG, e.toString());
        }
    }

3.)帶引數帶進度上傳檔案

 /**
     *上傳檔案
     * @param actionUrl 介面地址
     * @param paramsMap 引數
     * @param callBack 回撥
     * @param <T>
     */
    public <T> void upLoadFile(String actionUrl, HashMap<String, Object> paramsMap, final ReqProgressCallBack<T> callBack) {
        try {
            //補全請求地址
            String requestUrl = String.format("%s/%s", upload_head, actionUrl);
            MultipartBody.Builder builder = new MultipartBody.Builder();
            //設定型別
            builder.setType(MultipartBody.FORM);
            //追加引數
            for (String key : paramsMap.keySet()) {
                Object object = paramsMap.get(key);
                if (!(object instanceof File)) {
                    builder.addFormDataPart(key, object.toString());
                } else {
                    File file = (File) object;
                    builder.addFormDataPart(key, file.getName(), createProgressRequestBody(MEDIA_OBJECT_STREAM, file, callBack));
                }
            }
            //建立RequestBody
            RequestBody body = builder.build();
            //建立Request
            final Request request = new Request.Builder().url(requestUrl).post(body).build();
            final Call call = mOkHttpClient.newBuilder().writeTimeout(50, TimeUnit.SECONDS).build().newCall(request);
            call.enqueue(new Callback() {
                @Override
                public void onFailure(Call call, IOException e) {
                    Log.e(TAG, e.toString());
                    failedCallBack("上傳失敗", callBack);
                }

                @Override
                public void onResponse(Call call, Response response) throws IOException {
                    if (response.isSuccessful()) {
                        String string = response.body().string();
                        Log.e(TAG, "response ----->" + string);
                        successCallBack((T) string, callBack);
                    } else {
                        failedCallBack("上傳失敗", callBack);
                    }
                }
            });
        } catch (Exception e) {
            Log.e(TAG, e.toString());
        }
    }

4.）建立帶進度RequestBody

 /**
     * 建立帶進度的RequestBody
     * @param contentType MediaType
     * @param file  準備上傳的檔案
     * @param callBack 回撥
     * @param <T>
     * @return
     */
    public <T> RequestBody createProgressRequestBody(final MediaType contentType, final File file, final ReqProgressCallBack<T> callBack) {
        return new RequestBody() {
            @Override
            public MediaType contentType() {
                return contentType;
            }

            @Override
            public long contentLength() {
                return file.length();
            }

            @Override
            public void writeTo(BufferedSink sink) throws IOException {
                Source source;
                try {
                    source = Okio.source(file);
                    Buffer buf = new Buffer();
                    long remaining = contentLength();
                    long current = 0;
                    for (long readCount; (readCount = source.read(buf, 2048)) != -1; ) {
                        sink.write(buf, readCount);
                        current += readCount;
                        Log.e(TAG, "current------>" + current);
                        progressCallBack(remaining, current, callBack);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };
    }

5.)不帶進度檔案下載

  /**
     * 下載檔案
     * @param fileUrl 檔案url
     * @param destFileDir 儲存目標目錄
     */
    public <T> void downLoadFile(String fileUrl, final String destFileDir, final ReqCallBack<T> callBack) {
        final String fileName = MD5.encode(fileUrl);
        final File file = new File(destFileDir, fileName);
        if (file.exists()) {
            successCallBack((T) file, callBack);
            return;
        }
        final Request request = new Request.Builder().url(fileUrl).build();
        final Call call = mOkHttpClient.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                Log.e(TAG, e.toString());
                failedCallBack("下載失敗", callBack);
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                InputStream is = null;
                byte[] buf = new byte[2048];
                int len = 0;
                FileOutputStream fos = null;
                try {
                    long total = response.body().contentLength();
                    Log.e(TAG, "total------>" + total);
                    long current = 0;
                    is = response.body().byteStream();
                    fos = new FileOutputStream(file);
                    while ((len = is.read(buf)) != -1) {
                        current += len;
                        fos.write(buf, 0, len);
                        Log.e(TAG, "current------>" + current);
                    }
                    fos.flush();
                    successCallBack((T) file, callBack);
                } catch (IOException e) {
                    Log.e(TAG, e.toString());
                    failedCallBack("下載失敗", callBack);
                } finally {
                    try {
                        if (is != null) {
                            is.close();
                        }
                        if (fos != null) {
                            fos.close();
                        }
                    } catch (IOException e) {
                        Log.e(TAG, e.toString());
                    }
                }
            }
        });
    }

6.）帶進度檔案下載

 /**
     * 下載檔案
     * @param fileUrl 檔案url
     * @param destFileDir 儲存目標目錄
     */
    public <T> void downLoadFile(String fileUrl, final String destFileDir, final ReqProgressCallBack<T> callBack) {
        final String fileName = MD5.encode(fileUrl);
        final File file = new File(destFileDir, fileName);
        if (file.exists()) {
            successCallBack((T) file, callBack);
            return;
        }
        final Request request = new Request.Builder().url(fileUrl).build();
        final Call call = mOkHttpClient.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                Log.e(TAG, e.toString());
                failedCallBack("下載失敗", callBack);
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                InputStream is = null;
                byte[] buf = new byte[2048];
                int len = 0;
                FileOutputStream fos = null;
                try {
                    long total = response.body().contentLength();
                    Log.e(TAG, "total------>" + total);
                    long current = 0;
                    is = response.body().byteStream();
                    fos = new FileOutputStream(file);
                    while ((len = is.read(buf)) != -1) {
                        current += len;
                        fos.write(buf, 0, len);
                        Log.e(TAG, "current------>" + current);
                        progressCallBack(total, current, callBack);
                    }
                    fos.flush();
                    successCallBack((T) file, callBack);
                } catch (IOException e) {
                    Log.e(TAG, e.toString());
                    failedCallBack("下載失敗", callBack);
                } finally {
                    try {
                        if (is != null) {
                            is.close();
                        }
                        if (fos != null) {
                            fos.close();
                        }
                    } catch (IOException e) {
                        Log.e(TAG, e.toString());
                    }
                }
            }
        });
    }

 

7.）介面ReqProgressCallBack.java實現

public interface ReqProgressCallBack<T>  extends ReqCallBack<T>{
    /**
     * 響應進度更新
     */
    void onProgress(long total, long current);
}

8.）進度回撥實現

    /**
     * 統一處理進度資訊
     * @param total    總計大小
     * @param current  當前進度
     * @param callBack
     * @param <T>
     */
    private <T> void progressCallBack(final long total, final long current, final ReqProgressCallBack<T> callBack) {
        okHttpHandler.post(new Runnable() {
            @Override
            public void run() {
                if (callBack != null) {
                    callBack.onProgress(total, current);
                }
            }
        });
    }

 

小結：基於okHttp的檔案上傳、下載基本實現，接下來就是返回資料的解析了。