Android错误，缓冲区不足以容纳像素

Question

public Bitmap getScreenCap() throws IOException, InterruptedException {

    byte[] tempBuffer = new byte[100 * 1024 * 1024];
    StringBuilder buffer = new StringBuilder(100 * 1024 * 1024);

    Process exec = Runtime.getRuntime().exec("su -c /system/bin/screencap -p");

    final InputStream inputStream = exec.getInputStream();
    BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream);
    buffer.setLength(0);
    int count;
    while ((count = bufferedInputStream.read(tempBuffer)) > 0) {
        buffer.append(new String(tempBuffer, 0, count, StandardCharsets.ISO_8859_1));
    }
    bufferedInputStream.close();
    final int retCode = exec.waitFor();
    exec.destroy();
    tempBuffer = buffer.toString().getBytes(StandardCharsets.ISO_8859_1);
    Bitmap stitchBmp = Bitmap.createBitmap(3120, 1440, Bitmap.Config.ARGB_8888);
    stitchBmp.copyPixelsFromBuffer(ByteBuffer.wrap(tempBuffer));
    return stitchBmp;
}

这是我的代码。我在Android P系统上。我总是会收到此错误。

java.lang.RuntimeException：缓冲区不足以容纳像素

如何修改缓冲区大小？