Android钉钉服务器CalDAV账号验证Demo

以下是一个基于 Android 的钉钉服务器 CalDAV 账号验证 Demo 的示例代码：

import android.accounts.Account;
import android.accounts.AccountManager;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.Toast;

import com.github.scribejava.apis.DingTalkApi;
import com.github.scribejava.core.builder.ServiceBuilder;
import com.github.scribejava.core.model.OAuth2AccessToken;
import com.github.scribejava.core.oauth.OAuth20Service;

import java.io.IOException;

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class CalDavAccountVerificationTask extends AsyncTask<Void, Void, Boolean> {
    private final Context mContext;
    private final Account mAccount;

    public CalDavAccountVerificationTask(Context context, Account account) {
        mContext = context;
        mAccount = account;
    }

    @Override
    protected Boolean doInBackground(Void... params) {
        try {
            // 获取钉钉 OAuth2 认证 AccessToken
            OAuth20Service service = new ServiceBuilder("YOUR_CLIENT_ID")
                    .apiSecret("YOUR_CLIENT_SECRET")
                    .callback("YOUR_REDIRECT_URI")
                    .build(DingTalkApi.instance());
            OAuth2AccessToken accessToken = service.getAccessToken(mAccount.name);

            // 构建 CalDAV 账号验证请求
            String url = "https://oapi.dingtalk.com/caldav/principal";
            Request request = new Request.Builder()
                    .url(url)
                    .addHeader("Authorization", "Bearer " + accessToken.getAccessToken())
                    .addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3")
                    .build();

            // 发送 CalDAV 账号验证请求
            OkHttpClient client = new OkHttpClient();
            Response response = client.newCall(request).execute();

            // 判断响应状态码是否为 200
            return response.isSuccessful();
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
    }

    @Override
    protected void onPostExecute(Boolean success) {
        String message = success ? "验证成功" : "验证失败";
        Toast.makeText(mContext, message, Toast.LENGTH_SHORT).show();

        // 更新 CalDAV 账号验证状态
        AccountManager accountManager = AccountManager.get(mContext);
        accountManager.setUserData(mAccount, "calDavVerified", String.valueOf(success));
    }
}

使用方法：

AccountManager accountManager = AccountManager.get(context);
Account[] accounts = accountManager.getAccountsByType("com.dingtalk");
if (accounts.length > 0) {
    Account account = accounts[0];
    new CalDavAccountVerificationTask(context, account).execute();
}

其中，`YOUR_CLIENT_ID`、`YOUR_CLIENT_SECRET`、`YOUR_REDIRECT_URI` 分别替换为你的钉钉开放平台应用的 Client ID、Client Secret 和 Redirect URI。同时，也需要在 AndroidManifest.xml 文件中添加以下权限：

<uses-permission android:name="android.permission.INTERNET" />

另外，上述代码中的 `calDavVerified` 是自定义的一个用于记录 CalDAV 账号验证状态的 User Data Key，你可以根据实际情况进行更改。