AndroidTools：網絡工具-測試下載速度

AndroidTools Git地址：https://github.com/wisesun7/AndroidTools.git

     本方法的思路是，從遠程服務器中實時下載一次測試文件，記錄開始時間與結束時間，通過下載到本地的文件大小即可計算出實際下載速度。需要注意的是：

• 一定要設置超時時間，防止網速過慢時，長時間處於下載過程，本方法中設置的爲20秒
• 測速完畢後刪除本地已下載文件，防止佔用存儲空間
• 測速要在子線程中進行，主線程可用動畫標註進程
• 本方法中使用的公司提供的服務器，因此地址無法公開，見諒~

   /**
     *
     * @param NET_TEST_PATH 下載本地路徑
     * @param NET_TEST_URL 遠程下載路徑
     * @return
     */
    public float checkNetSpeed(String NET_TEST_PATH , String NET_TEST_URL) {
        float testSpeed = 0;
        int fileLength = 0;
        long startTime = 0;
        long endTime = 0;
        long middleTime = 0;
        final String fileName = "test.apk";
        HttpURLConnection conn = null;
        InputStream is = null;
        FileOutputStream fos = null;
        File tmpFile = new File(NET_TEST_PATH);
        if (!tmpFile.exists()) {
            tmpFile.mkdir();
        }
        final File file = new File(NET_TEST_PATH + fileName);
        try {
            URL url = new URL(NET_TEST_URL);
            try {
                conn = (HttpURLConnection) url.openConnection();
                fileLength = conn.getContentLength();
                if (fileLength <= 0) {
                    Log.d(TAG, "fileLength <= 0");
                    return 0;
                }
                startTime = SystemClock.uptimeMillis() / 1000;
                //startTime = System.currentTimeMillis() / 1000;
                is = conn.getInputStream();
                fos = new FileOutputStream(file);
                byte[] buf = new byte[256];
                conn.connect();
                if (conn.getResponseCode() >= 400) {
                    Log.d(TAG, "conn.getResponseCode() = " + conn.getResponseCode());
                    return 0;
                } else {
                    while (true) {
                        if (is != null) {
                            int numRead = is.read(buf);
                            if (numRead <= 0) {
                                break;
                            } else {
                                fos.write(buf, 0, numRead);
                            }
                        } else {
                            break;
                        }
                        middleTime = SystemClock.uptimeMillis()/1000;
                        //設置超時時間20s
                        if (middleTime - startTime >= 20){
                            break;
                        }
                    }
                }
                endTime = SystemClock.uptimeMillis()/1000;
                //endTime = System.currentTimeMillis() / 1000;
                Log.d(TAG, "endTime = " + endTime);
            } catch (IOException e) {
                Log.e(TAG,"error message : " + e.getMessage());
            } finally {
                if (conn != null) {
                    conn.disconnect();
                }
                try {
                    if (fos != null) {
                        fos.close();
                    }
                    if (is != null) {
                        is.close();
                    }
                } catch (IOException e1) {
                    e1.printStackTrace();
                }
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        File readyFile = new File(NET_TEST_PATH + fileName);
        long downLength =  readyFile.length();
        Log.d(TAG,"downLength : " + downLength / 1024 / 1024);
        //刪除本地已下載文件，防止佔用存儲空間
        FileUtils.deleteFile(NET_TEST_PATH + fileName);
        Log.d(TAG, "fileLength" + (fileLength / (1024 * 1024)));
        Log.d(TAG, "spend time" + (endTime - startTime));
        if ( (endTime - startTime) > 0){
            testSpeed = (downLength / (1024)) / (endTime - startTime);
        }else {
            testSpeed = 0;
        }

        return testSpeed;
    }