OKHttp附件下载实现，进度监听

来源：互联网发布：欧润网络编辑：程序博客网时间：2024/05/14 05:40

1.创建请求request

Request request = new Request.Builder().url(url).build();

2.获取response，由于是耗时操作，所以需要异步获取

 new Thread(new Runnable() {            @Override            public void run() {                ...                try {                    Response response = okHttpClient.newCall(request).execute();                    if (!response.isSuccessful() || response == null || response.body() == null) {                        sendMessage(1, 0, 0, "");                    } else {                        //处理response                        ...                    }                } catch (IOException e) {                    e.printStackTrace();                    sendMessage(1, 0, 0, "");                }            }        }).start();

3.处理获取的response，并进行进度监听

InputStream is = null;byte[] buf = new byte[2048];int len = 0;FileOutputStream fos = null;try {    is = response.body().byteStream();    int last = 0;    final long total = response.body().contentLength();    long sum = 0;    fos = new FileOutputStream(new File(apkPath));    while ((len = is.read(buf)) != -1) {        sum += len;        fos.write(buf, 0, len);        int now = (int) (sum * 100 / total);        if (last < now) {            LogUtils.d("current:" + last + ";total:" + 100);            sendMessage(3, last, 100, "");            last = now;        }    }    fos.flush();    sendMessage(2, 0, 0, "");} catch (IOException e) {    e.printStackTrace();    sendMessage(1, 0, 0, "");} finally {    try {        if (is != null) {           is.close();        }    } catch (IOException e) {        e.printStackTrace();    }    try {        if (fos != null) {           fos.close();        }    } catch (IOException e) {        e.printStackTrace();    }}

4.通知主线程进行相应的处理

public void sendMessage(int what, long current, long total, String msg) {        Message message = Message.obtain();        message.what = what;        message.arg1 = (int) current;        message.arg2 = (int) total;        message.obj = msg;        handler.sendMessage(message);    }     private Handler handler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            switch (msg.what) {                case 1:                    //下载失败                    ...                    break;                case 2:                    //下载成功                    ...                    break;                case 3:                    //下载进度                    int current = msg.arg1;                    int total = msg.arg2;                    ...                    break;            }        }    };

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