如何使同步或异步HTTP POST /获取Android Studio中 [英] how make Sync or Async HTTP Post/Get in Android Studio
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问题描述
我在Android的编程初学者。我使用Android的工作室来开发一些简单的应用程序。
在这个时刻，我需要同步或异步HTTP POST / GET从Web服务获取的HTML数据。我这个搜索整个互联网，但我不能给好的结果。
我试图用这样的例子：
- 的Android系列GET / POST和multipost请求
- Jcabi.com
- 执行android系统 HTTP POST请求
但没有他们为我工作。
的HttpClient 和 HTTPGET 被划掉，错误是：
org.apache.http.client.HttpClient是德precated
code：
尝试
{
HttpClient的客户端=新DefaultHttpClient（）;
字符串的getURL =google.com
HTTPGET GET =新HTTPGET（的getURL）;
HTT presponse responseGet = client.execute（获取）;
HttpEntity resEntityGet = responseGet.getEntity（）;
如果（resEntityGet！= NULL）
{
//做一些与响应
}
}
赶上（例外五）
{
e.printStackTrace（）;
}
解决方案我已经贴在下面的例子是基于我的 Android开发者文档找到了一个例子。你可以发现，例如这里，看看那一个更COM prehensive例子。
您将能够作出任何HTTP请求具有以下
进口android.app.Activity;
进口android.os.AsyncTask;
进口android.os.Bundle;
进口android.util.Log;
进口android.widget.Toast;进口java.io.IOException异常;
进口的java.io.InputStream;
进口java.io.InputStreamReader中;
进口的java.io.Reader;
进口java.io.UnsupportedEncodingException;
进口java.net.HttpURLConnection中;
进口的java.net.URL;公共类MainActivity延伸活动{
私有静态最后弦乐TAG = MainActivity.class.getSimpleName（）; @覆盖
保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.activity_main）; 新DownloadTask（）执行（http://www.google.com/）;
} 私有类DownloadTask扩展的AsyncTask＆LT;弦乐，太虚，字符串＆GT; { @覆盖
保护字符串doInBackground（字符串... PARAMS）{
//做在这里你的要求，这样你就不会中断UI线程
尝试{
返回downloadContent（PARAMS [0]）;
}赶上（IOException异常五）{
返回无法检索数据的URL可能是无效的。
}
} @覆盖
保护无效onPostExecute（字符串结果）{
//这里你的任务完成
Toast.makeText（MainActivity.this，结果，Toast.LENGTH_LONG）.show（）;
}
} 私人字符串downloadContent（字符串myurl）抛出IOException
InputStream为= NULL;
INT长度= 500; 尝试{
网址URL =新的URL（myurl）;
HttpURLConnection的康恩=（HttpURLConnection类）url.openConnection（）;
conn.setReadTimeout（10000 / *毫秒* /）;
conn.setConnectTimeout（15000 / *毫秒* /）;
conn.setRequestMethod（GET）;
conn.setDoInput（真）;
conn.connect（）;
INT响应= conn.getResponse code（）;
Log.d（TAG的反应是：+响应）;
是= conn.getInputStream（）; //将InputStream的成字符串
字符串contentAsString = convertInputStreamToString（是，长度）;
返回contentAsString;
} {最后
如果（是！= NULL）{
is.close（）;
}
}
} 公共字符串convertInputStreamToString（InputStream的流，INT长度）抛出IOException异常，UnsupportedEncodingException {
读卡器读卡器= NULL;
读者=新InputStreamReader的（流，UTF-8）;
的char []缓冲区=新的char [长度]
reader.read（缓冲液）;
返回新的String（缓冲）;
}
}您可以玩的code，以满足您的需求。
I'm beginner in Android programming. I'm using Android studio to develop some simple app.
At this moment 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.
I tried to use this examples:
but nothing of them working for me.
HttpClientandHttpGetis cross out, error is :"org.apache.http.client.HttpClient is deprecated "
Code:
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(); }
解决方案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.
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); } }You can play around with the code to suit your needs
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