如何在Android中调用Rest API

implementation 'com.squareup.okhttp3:okhttp:4.9.1'

OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
        .url("https://api.example.com/data")
        .build();

try {
    Response response = client.newCall(request).execute();
    String responseData = response.body().string();
    // 处理服务器响应的数据
} catch (IOException e) {
    e.printStackTrace();
}

OkHttpClient client = new OkHttpClient();
RequestBody requestBody = new FormBody.Builder()
        .add("username", "john")
        .add("password", "123456")
        .build();

Request request = new Request.Builder()
        .url("https://api.example.com/login")
        .post(requestBody)
        .build();

try {
    Response response = client.newCall(request).execute();
    String responseData = response.body().string();
    // 处理服务器响应的数据
} catch (IOException e) {
    e.printStackTrace();
}

ApiService apiService = new ApiService();
apiService.getData(new ApiService.DataCallback() {
    @Override
    public void onSuccess(String data) {
        // 处理获取到的数据
    }

    @Override
    public void onFailure() {
        // 处理请求失败的情况
    }
});