小编Jam*_*man的帖子

在我的 Android 应用程序中，我正在访问 Google 云存储。我已经生成了私钥 xxxxxxxkey.p12。我已将密钥文件放在资产文件夹中。但在运行项目时，它不会打开 key.p12 文件。我已经尝试将其放在资产文件夹之外，仍然没有结果。

     httpTransport = AndroidHttp.newCompatibleTransport(); 
            AssetManager am = getAssets();
            InputStream inputStream = am.open("xxxxxxxxxxKey.p12");
            File file = createFileFromInputStream(inputStream);

       GoogleCredential credential = new GoogleCredential.Builder()
                            .setTransport(httpTransport)
                            .setJsonFactory(JSON_FACTORY)
                            .setServiceAccountId(xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx@developer.gserviceaccount.com")
                            .setServiceAccountScopes(Collections.singleton(STORAGE_SCOPE))
                            .setServiceAccountPrivateKeyFromP12File(file).build();

从输入流创建文件()

private File createFileFromInputStream(InputStream inputStream) {

        try {
            File f = new File("download/MyKey.p12");
            OutputStream outputStream = new FileOutputStream(f);
            byte buffer[] = new byte[1024];
            int length = 0;

            while ((length = inputStream.read(buffer)) > 0) {
                outputStream.write(buffer, 0, length);
            }

            outputStream.close();
            inputStream.close();

            return f;
        } catch (IOException e) …