okhttp 下载文件

今天，来说一个 我用的下载文件的方法，用的是okhttp下载方式

 a.加载依赖

implementation 'com.squareup.okhttp3:logging-interceptor:3.5.0'
implementation 'com.squareup.okhttp3:okhttp:3.6.0'

b.代码断

/**
 * Created by Jane on 2019/2/15.
 */
public class OkhttpDownloadFile {
    private final String TAG = "OkhttpDownloadFile";
    private String mSDCardPath = Environment.getExternalStorageDirectory().getAbsolutePath();
    private static OkhttpDownloadFile okhttpDownloadFile;
    private static Context mContext;
    private static Handler handler;

    /**
     * 设置单例模式
     */
    public static OkhttpDownloadFile getInstance(Context context, Handler mHandle) {
        if (okhttpDownloadFile == null) {
            okhttpDownloadFile = new OkhttpDownloadFile();
        }
        handler = mHandle;
        return okhttpDownloadFile;
    }

    /**
     * 下载文件
     *
     * @param url      文件下载路径
     * @param fileName 文件名
     **/
    public void downloadFile(final String url, final String fileName) {
        //下载路径，如果路径无效了，可换成你的下载路径
        final long startTime = System.currentTimeMillis();
        Log.i(TAG, "startTime=" + startTime);
        Request request = new Request.Builder().url(url).build();
        new OkHttpClient().newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(okhttp3.Call call, IOException e) {
                Log.e(TAG, "fail===cause==" + e.getCause().getMessage());
                e.printStackTrace();
            }

            @Override
            public void onResponse(okhttp3.Call call, Response response) throws IOException {
                Sink sink = null;
                BufferedSink bufferedSink = null;
                try {
                    File dest = new File(mSDCardPath, fileName);
                    sink = Okio.sink(dest);
                    bufferedSink = Okio.buffer(sink);
                    bufferedSink.writeAll(response.body().source());
                    bufferedSink.close();
                    JSONObject jsonObject = new JSONObject();
                    jsonObject.put("fileName", Constants.FILE_EXT_NAME);
                    jsonObject.put("filePath", mSDCardPath + "/" + Constants.FILE_EXT_NAME);
                    Message message = handler.obtainMessage();
                    message.what = 1;
                    message.obj = jsonObject.toString();
                    handler.sendMessage(message);
                    Log.i(TAG, "download success=" + mSDCardPath + "/" + Constants.FILE_EXT_NAME);
                    Log.i(TAG, "totalTime=" + (System.currentTimeMillis() - startTime));
                } catch (Exception e) {
                    e.printStackTrace();
                    Log.i(TAG, "download failed");
                } finally {
                    if (bufferedSink != null) {
                        bufferedSink.close();
                    }
                }
            }
        });
    }
}

其他就不多做介绍了，只要自己用着方便就行了啊哈