我正在尝试使用REDCap API使用Android应用程序导入记录。如何让活动中的按钮在单击时运行下面的代码，以便将数据上传到REDCap？如果有其他方法对此进行编码，那也会很有帮助。我基本上想使用他们的API令牌和已经给我的URL将JSON对象中的数据发送到REDCap
package com.example.maciej.fuglmeyer;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
public class MyClass
{
private final HttpPost post;
private final HttpClient client;
private int respCode;
private BufferedReader reader;
private final StringBuffer result;
private String line;
@SuppressWarnings("unchecked")
public MyClass(final Config c)
{
JSONObject record = new JSONObject();
record.put("record_id", "3");
record.put("first_name", "First");
record.put("last_name", "Last");
record.put("address", "123 Cherry LanenNashville, TN 37015");
record.put("telephone", "(615) 255-4000");
record.put("email", "first.last@gmail.com");
record.put("dob", "1972-08-10");
record.put("age", "43");
record.put("ethnicity", "1");
record.put("race", "4");
record.put("sex", "1");
record.put("height", "180");
record.put("weight", "105");
record.put("bmi", "31.4");
record.put("comments", "comments go here");
record.put("demographics_complete", "2");
JSONArray data = new JSONArray();
data.add(record);
List<NameValuePair> params = new ArrayList<>();
params.add(new BasicNameValuePair("token", "123423412342134"));
params.add(new BasicNameValuePair("content", "record"));
params.add(new BasicNameValuePair("format", "json"));
params.add(new BasicNameValuePair("type", "flat"));
params.add(new BasicNameValuePair("data", data.toJSONString()));
post = new HttpPost("URLGOESHERE.com");
post.setHeader("Content-Type", "application/x-www-form-urlencoded");
try
{
post.setEntity(new UrlEncodedFormEntity(params));
}
catch (final Exception e)
{
e.printStackTrace();
}
result = new StringBuffer();
client = HttpClientBuilder.create().build();
respCode = -1;
reader = null;
line = null;
}
public void doPost()
{
HttpResponse resp = null;
try
{
resp = client.execute(post);
}
catch (final Exception e)
{
e.printStackTrace();
}
if(resp != null)
{
respCode = resp.getStatusLine().getStatusCode();
try
{
reader = new BufferedReader(new InputStreamReader(resp.getEntity().getContent()));
}
catch (final Exception e)
{
e.printStackTrace();
}
}
if(reader != null)
{
try
{
while((line = reader.readLine()) != null)
{
result.append(line);
}
}
catch (final Exception e)
{
e.printStackTrace();
}
}
System.out.println("respCode: " + respCode);
System.out.println("result: " + result.toString());
}
}
1）用按钮和编辑文本创建一个简单的布局，以便上传数据：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/parent_log"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="16dp"
android:paddingEnd="16dp"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:paddingStart="16dp"
android:paddingTop="16dp">
<EditText
android:id="@+id/input_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="8dp"
android:ems="10"
android:hint="Exemplo: João da Silva"
android:inputType="textPersonName" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="CADASTRAR"
android:id="@+id/uploadData"
android:layout_gravity="center_horizontal"
android:layout_marginTop="16dp"
android:onClick="onClick" />
</LinearLayout>
2） 在on单击"活动"上的方法中，获取数据并调用类配置和导入数据（REDCap API上Java示例中的内容）
public void onClick(View v) {
String name = findViewById(R.id.input_name).getText().toString();
Config config = new Config();
//I have changed the constructor to send the only string that will be
//uploaded, but you can send a context, array of strings, whatever...
ImportRecords importRecords = new ImportRecords(config, name);
importRecords.doPost();
}
3） 在您发布的ImportRecords类上，更改构造函数（如果您愿意），下面是一个可以执行的代码示例
public class ImportRecords {
private final List<NameValuePair> params;
private final HttpPost post;
private HttpResponse resp;
private final HttpClient client;
private int respCode;
private BufferedReader reader;
private final StringBuffer result;
private String line;
private final JSONObject record;
private final JSONArray data;
private String recordID;
//private final SecureRandom random;
@SuppressWarnings("unchecked")
public ImportRecords(final Config c, String name) {
//Create an id. Id is the record identifier
//For example if you want get the record in the future, you'll need that
Random r = new Random();
int id = r.nextInt();
record = new JSONObject();
record.put("record_id", id);
record.put("first_name", name);
data = new JSONArray();
data.add(record);
params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("token", c.API_TOKEN));
params.add(new BasicNameValuePair("content", "record"));
params.add(new BasicNameValuePair("format", "json"));
params.add(new BasicNameValuePair("type", "flat"));
params.add(new BasicNameValuePair("data", data.toJSONString()));
params.add(new BasicNameValuePair("forms", "pergunta"));
//c.API_URL is the url found on your REDCap project - API
post = new HttpPost(c.API_URL);
post.setHeader("Content-Type", "application/x-www-form-urlencoded");
try {
post.setEntity(new UrlEncodedFormEntity(params));
} catch (final Exception e) {
e.printStackTrace();
}
result = new StringBuffer();
client = HttpClientBuilder.create().build();
respCode = -1;
reader = null;
line = null;
}
4） 在Android上，Post方法需要在后台运行。我已经为该创建了异步任务
public void doPost() {
new Task().execute();
}
public class Task extends AsyncTask<Void, Void, Boolean> {
@Override
protected Boolean doInBackground(Void... params) {
resp = null;
try {
resp = client.execute(post);
} catch (final Exception e) {
e.printStackTrace();
return false;
}
if (resp != null) {
respCode = resp.getStatusLine().getStatusCode();
try {
reader = new BufferedReader(new InputStreamReader(resp.getEntity().getContent()));
} catch (final Exception e) {
e.printStackTrace();
return false;
}
}
if (reader != null) {
try {
while ((line = reader.readLine()) != null) {
result.append(line);
}
} catch (final Exception e) {
e.printStackTrace();
return false;
}
}
System.out.println("respCode: " + respCode);
System.out.println("result: " + result.toString());
if (respCode!=200)
return false;
return true;
}
@Override
protected void onPostExecute(Boolean aBoolean) {
super.onPostExecute(aBoolean);
if (aBoolean)
Log.e("RESULT","The record was sent");
else
Log.e("RESULT","The record was not sent");
}
}