android - java.io.ByteArrayOutputStream.expand(ByteArrayOutputStream.java :91)? 处的 java.lang.OutOfMemoryError

Question

我在将文件上传到google drive时遇到这个问题，我正在将录制的音频上传到google drive，当时出现了这个异常

用于写入文件内容的代码

                      OutputStream outputStream = result.getDriveContents().getOutputStream();
                    FileInputStream fis;
                    try {
                        fis = new FileInputStream(file);
                        ByteArrayOutputStream baos = new ByteArrayOutputStream();
                        byte[] buf = new byte[1024];
                        int n;
                        while (-1 != (n = fis.read(buf)))
                            baos.write(buf, 0, n);
                        byte[] photoBytes = baos.toByteArray();
                        outputStream.write(photoBytes);

                        outputStream.close();
                        outputStream = null;
                        fis.close();
                        fis = null;

                        Log.e("File Size", "Size " + file.length());

                    } catch (FileNotFoundException e) {
                        Log.v("EXCEPTION", "FileNotFoundException: " + e.getMessage());
                    } catch (IOException e1) {
                        Log.v("EXCEPTION", "Unable to write file contents." + e1.getMessage());
                    }

异常发生在`baos.write(buf, 0, n);这行

请帮我解决这个错误。`

Answer 1

首先写入 ByteArrayOutputStream 意味着完整的文件将最终进入 JVM 堆。根据文件大小和堆大小，这可能是不可能的，因此异常(exception)。如果您不需要 ByteArrayOutputStream 做任何其他事情，只需直接写入 outputStream:

OutputStream outputStream = result.getDriveContents().getOutputStream();
FileInputStream fis;
try {
    fis = new FileInputStream(file);
    byte[] buf = new byte[1024];
    int n;
    while (-1 != (n = fis.read(buf)))
        outputStream.write(buf, 0, n);


} catch (FileNotFoundException e) {
    Log.v("EXCEPTION", "FileNotFoundException: " + e.getMessage());
} catch (IOException e1) {
    Log.v("EXCEPTION", "Unable to write file contents." + e1.getMessage());
} finally {
    outputStream.close();
    fis.close();
    Log.e("File Size", "Size " + file.length());
}

P.S.:如果引用很快超出范围，则没有必要清空引用...