如何进行同步或异步HTTP发布/获取 [英] How to make Sync or Async HTTP Post/Get
问题描述
我需要同步或异步HTTP Post / Get来从Web服务获取HTML数据。我搜索整个互联网,但我不能给出好结果。
I need Sync or Async HTTP Post/Get to get HTML data from Web-Service. I search this whole internet but I can't give good result.
我试图使用这个例子:
- Android Series get/post and multipost requests
- Jcabi.com
- Execute HTTP Post request in android
但它们对我没什么用。
HttpClient
和 HttpGet
被淘汰,错误是:
org.apache.http.client.HttpClient已弃用
"org.apache.http.client.HttpClient is deprecated "
代码:
try
{
HttpClient client = new DefaultHttpClient();
String getURL = "google.com";
HttpGet get = new HttpGet(getURL);
HttpResponse responseGet = client.execute(get);
HttpEntity resEntityGet = responseGet.getEntity();
if (resEntityGet != null)
{
//do something with the response
}
}
catch (Exception e)
{
e.printStackTrace();
}
推荐答案
我在下面发布的示例基于我在 Android Developer Docs 上找到的示例。您可以在这里找到该示例,请查看更多信息综合示例。
The example I have posted below is based on an example that I found on the Android Developer Docs. You can find that example HERE, look at that for a more comprehensive example.
您可以使用以下内容发出任何http请求
You will be able to make any http requests with the following
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
public class MainActivity extends Activity {
private static final String TAG = MainActivity.class.getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new DownloadTask().execute("http://www.google.com/");
}
private class DownloadTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
//do your request in here so that you don't interrupt the UI thread
try {
return downloadContent(params[0]);
} catch (IOException e) {
return "Unable to retrieve data. URL may be invalid.";
}
}
@Override
protected void onPostExecute(String result) {
//Here you are done with the task
Toast.makeText(MainActivity.this, result, Toast.LENGTH_LONG).show();
}
}
private String downloadContent(String myurl) throws IOException {
InputStream is = null;
int length = 500;
try {
URL url = new URL(myurl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000 /* milliseconds */);
conn.setConnectTimeout(15000 /* milliseconds */);
conn.setRequestMethod("GET");
conn.setDoInput(true);
conn.connect();
int response = conn.getResponseCode();
Log.d(TAG, "The response is: " + response);
is = conn.getInputStream();
// Convert the InputStream into a string
String contentAsString = convertInputStreamToString(is, length);
return contentAsString;
} finally {
if (is != null) {
is.close();
}
}
}
public String convertInputStreamToString(InputStream stream, int length) throws IOException, UnsupportedEncodingException {
Reader reader = null;
reader = new InputStreamReader(stream, "UTF-8");
char[] buffer = new char[length];
reader.read(buffer);
return new String(buffer);
}
}
您可以使用代码来满足您的需求
You can play around with the code to suit your needs
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