Android ACRA库是一个用于捕获应用程序奔溃的库，这个库默认使用HTTP Basic Authentication进行身份验证。如果在应用程序中需要使用Bearer身份验证，则需要进行修改。

首先需要创建一个自定义的HttpSender用于发送崩溃报告。在创建这个HttpSender时，需要在请求头中添加Authorization参数，并使用Bearer + token的形式进行身份验证。

以下是创建自定义HttpSender的示例代码：

public class CustomHttpSender implements HttpSender {
    private URL mFormUri;
    private Map mHeaders;
    private Method mMethod = Method.POST;
    private Type mType = Type.FORM;
    private String mUsername;
    private String mPassword;
    private String mToken;

    public CustomHttpSender(String formUri, Map headers, String token){
        try {
            mFormUri = new URL(formUri);
        } catch (MalformedURLException e) {
            throw new ACRAConfigurationException("formUri is invalid", e);
        }
        mHeaders = headers;
        mToken = token;
    }

    @Override
    public void send(ReportField[] reportFields, String s) throws IOException {
        String content = createContent(reportFields, s);
        HttpURLConnection conn = null;
        try{
            conn = (HttpURLConnection) mFormUri.openConnection();
            conn.setReadTimeout(10000);
            conn.setConnectTimeout(15000);
            conn.setRequestMethod(mMethod.name());
            conn.setDoInput(true);
            conn.setDoOutput(true);

            conn.setRequestProperty("Content-Type", mType.getContentType());
            conn.setRequestProperty("Authorization", "Bearer " + mToken); // 添加Bearer身份验证

            for(Map.Entry header : mHeaders.entrySet()){
                conn.setRequestProperty(header.getKey(),header.getValue());
            }

            OutputStream os = conn.getOutputStream();
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
            writer.write(content);
            writer.flush();
            writer.close();
            os.close();

            int responseCode = conn.getResponseCode();
            if(responseCode != HttpURLConnection.HTTP_OK){
                throw new IOException("Unexpected HTTP response: " + responseCode + " " + conn.getResponseMessage