Android/Java:如何跟踪InputStream的进度

import java.io.IOException;
import java.io.InputStream;

public class ProgressInputStream extends InputStream {
    private InputStream inputStream;
    private long progress;

    public ProgressInputStream(InputStream inputStream) {
        this.inputStream = inputStream;
        this.progress = 0;
    }

    @Override
    public int read() throws IOException {
        int data = inputStream.read();
        if (data != -1) {
            progress++;
        }
        return data;
    }

    @Override
    public int read(byte[] b) throws IOException {
        int bytesRead = inputStream.read(b);
        if (bytesRead != -1) {
            progress += bytesRead;
        }
        return bytesRead;
    }

    @Override
    public int read(byte[] b, int off, int len) throws IOException {
        int bytesRead = inputStream.read(b, off, len);
        if (bytesRead != -1) {
            progress += bytesRead;
        }
        return bytesRead;
    }

    public long getProgress() {
        return progress;
    }

    // 其他重写的InputStream方法...

    // 示例使用腾讯云对象存储 COS（Cloud Object Storage）作为相关产品
    // 腾讯云COS产品介绍链接：https://cloud.tencent.com/product/cos
}

try {
    InputStream inputStream = new ProgressInputStream(new FileInputStream("file.txt"));
    byte[] buffer = new byte[1024];
    int bytesRead;
    while ((bytesRead = inputStream.read(buffer)) != -1) {
        // 处理读取的数据
        // 可以通过调用getProgress()方法获取当前读取的进度
    }
    inputStream.close();
} catch (IOException e) {
    e.printStackTrace();
}