Android SDK 批量文件上传的实现

今天终于搞定了批量文件上传，特地分享出来供大家参考。

    //创建一个新线程以免阻塞主线程
    new Thread() {
        @Override
        public void run() {
            for (int i = 0; i < files.size(); i++) { //这里的 files 是一个 ArrayList<AVFile> 集合
                CountDownLatch latch = new CountDownLatch(1); //创建一个CountDownLatch对象用来阻塞这个for循环
                UploadLatch upload = new UploadLatch(files.get(i), latch, i + 1, files.size());  //下面有一个UploadLatch类继承自Thread
                upload.start();
                try {
                    latch.await(); //阻塞for循环
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            //for循环结束后需要做的事情
        }
    }.start();




//UploadLatch类
public class UploadLatch extends Thread {

    private AVFile file;
    private CountDownLatch latch;
    private int currentnum;
    private int totalnum;

    //构造函数
    //注意AVFile和CountDownLatch一定要传进来
    public UploadLatch(AVFile file, CountDownLatch latch, int a, int b) {
        this.file = file;
        this.latch = latch;
        this.currentnum = a;
        this.totalnum = b;
    }

    //执行Thread.start()时回自动调用这个方法
    public void run() {
        file.saveInBackground(new SaveCallback() {
            @Override
            public void done(AVException e) {
                if (e == null) Log.w("INFO", "SUCCESS");
                if (e != null) Log.e("INFO", "FAILURE");
                latch.countDown(); //关键部分，因为传进来的latch是从1开始的，这里会变成0，上面的for循环就会继续执行了
            }
        }, new ProgressCallback() {
            @Override
            public void done(Integer integer) {
                Log.i("INFO", "PROGRES [" + currentnum + "/" + totalnum + "] - " + integer + " %");
            }
        });
    }
}

关键代码都在这里了，大家如果有更好的方法也欢迎拿出来分享！