如何添加的AsyncTask在HttpURLConnection的？ [英] How to add AsyncTask in an HttpURLConnection?
本文介绍了如何添加的AsyncTask在HttpURLConnection的？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在服务器建立连接时，我的问题是，我需要把的AsyncTask 我的code，因为它不是在SDK版本工作 10 起来。我不想使用 StrictMode.ThreadPolicy 。
公共类TestConnection延伸活动{@覆盖
公共无效的onCreate（捆绑cbundle）{
super.onCreate（cbundle）; ConnectivityManager aConnectivityManager =（ConnectivityManager）getSystemService（Context.CONNECTIVITY_SERVICE）;
的NetworkInfo aNetworkInfo = aConnectivityManager.getActiveNetworkInfo（）;
如果（aNetworkInfo =空＆放大器;！＆放大器; aNetworkInfo.isConnected（））{
Toast.makeText（这一点，网络连接，Toast.LENGTH_LONG）.show（）;
}其他{
Toast.makeText（这一点，网络连接超时，Toast.LENGTH_LONG）.show（）;
}
URL aURL;
/ *将充满以后显示出来。 * /
字符串ASTRING = NULL; / *我们将展示我们在一个TextView读取数据。 * /
TextView的aTextView =新的TextView（本）;
尝试{ / *定义我们想从加载数据的URL。 * /
aURL =新的URL（
HTTP：// URL）; / *打开到URL的连接。 * /
最后HttpURLConnection的aHttpURLConnection =（HttpURLConnection类）aURL.openConnection（）; / *定义InputStreams从URLConnection的阅读。 * /
InputStream的aInputStream = aHttpURLConnection.getInputStream（）;
的BufferedInputStream aBufferedInputStream =新的BufferedInputStream（
aInputStream）; / *读取字节的缓冲区，直到有没有更多阅读（-1）* /
ByteArrayBuffer aByteArrayBuffer =新ByteArrayBuffer（50）;
INT电流= 0;
而（（电流= aBufferedInputStream.read（））！= - 1）{
aByteArrayBuffer.append（（字节）电流）;
}
/ *读取转换为字符串的字节数。 * /
ASTRING =新的String（aByteArrayBuffer.toByteArray（））;
}赶上（例外aException）{ / *在我们要显示它的任何错误。 * /
ASTRING = aException.getMessage（）;
} / *显示GUI上的字符串。 * /
aTextView.setText（ASTRING）;
this.setContentView（aTextView）;}}
解决方案
私有类ConnectionTask扩展的AsyncTask＆LT;弦乐，太虚，字符串＆GT; {
@覆盖
受保护的byte [] doInBackground（字符串的URL ...）{
尝试{
aURL =新的URL（
网址[0]）; / *打开到URL的连接。 * /
最后HttpURLConnection的aHttpURLConnection =（HttpURLConnection类）aURL.openConnection（）; / *定义InputStreams从URLConnection的阅读。 * /
InputStream的aInputStream = aHttpURLConnection.getInputStream（）;
的BufferedInputStream aBufferedInputStream =新的BufferedInputStream（
aInputStream）; / *读取字节的缓冲区，直到有没有更多阅读（-1）* /
ByteArrayBuffer aByteArrayBuffer =新ByteArrayBuffer（50）;
INT电流= 0;
而（（电流= aBufferedInputStream.read（））！= - 1）{
aByteArrayBuffer.append（（字节）电流）;
}
/ *读取转换为字符串的字节数。 * /
ASTRING =新的String（aByteArrayBuffer.toByteArray（））; }赶上（IOException异常五）{
Log.d（TAG，e.toString（））;
}
返回ASTRING;
} @覆盖
保护无效onPostExecute（字符串结果）{
//结果是你从你的连接得到了什么
aTextView.setText（结果）; }}
如何称呼它：
ConnectionTask任务=新ConnectionTask（）;
的String [] = PARAMS新的String [2];
PARAMS [0] = URL;
PARAMS [1] = somethingelseifneeded;
task.execute（PARAMS）;
I'm establishing a server connection, my problem is that I need to put an AsyncTask on my code, because its not working in sdk version 10 up. I don't want to use the StrictMode.ThreadPolicy.
public class TestConnection extends Activity {
@Override
public void onCreate(Bundle cbundle) {
super.onCreate(cbundle);
ConnectivityManager aConnectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo aNetworkInfo = aConnectivityManager.getActiveNetworkInfo();
if (aNetworkInfo != null && aNetworkInfo.isConnected()){
Toast.makeText(this, "Internet Connected", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(this, "Internet Connection Timeout", Toast.LENGTH_LONG).show();
}
URL aURL;
/* Will be filled and displayed later. */
String aString = null;
/* We will show the data we read in a TextView. */
TextView aTextView = new TextView(this);
try {
/* Define the URL we want to load data from. */
aURL = new URL(
"http://url");
/* Open a connection to that URL. */
final HttpURLConnection aHttpURLConnection = (HttpURLConnection) aURL.openConnection();
/* Define InputStreams to read from the URLConnection. */
InputStream aInputStream = aHttpURLConnection.getInputStream();
BufferedInputStream aBufferedInputStream = new BufferedInputStream(
aInputStream);
/* Read bytes to the Buffer until there is nothing more to read(-1) */
ByteArrayBuffer aByteArrayBuffer = new ByteArrayBuffer(50);
int current = 0;
while ((current = aBufferedInputStream.read()) != -1) {
aByteArrayBuffer.append((byte) current);
}
/* Convert the Bytes read to a String. */
aString = new String(aByteArrayBuffer.toByteArray());
} catch (Exception aException) {
/* On any Error we want to display it. */
aString = aException.getMessage();
}
/* Show the String on the GUI. */
aTextView.setText(aString);
this.setContentView(aTextView);
}
}
解决方案
private class ConnectionTask extends AsyncTask<String, Void, String>{
@Override
protected byte[] doInBackground(String... urls) {
try {
aURL = new URL(
urls[0]);
/* Open a connection to that URL. */
final HttpURLConnection aHttpURLConnection = (HttpURLConnection) aURL.openConnection();
/* Define InputStreams to read from the URLConnection. */
InputStream aInputStream = aHttpURLConnection.getInputStream();
BufferedInputStream aBufferedInputStream = new BufferedInputStream(
aInputStream);
/* Read bytes to the Buffer until there is nothing more to read(-1) */
ByteArrayBuffer aByteArrayBuffer = new ByteArrayBuffer(50);
int current = 0;
while ((current = aBufferedInputStream.read()) != -1) {
aByteArrayBuffer.append((byte) current);
}
/* Convert the Bytes read to a String. */
aString = new String(aByteArrayBuffer.toByteArray()); } catch (IOException e) {
Log.d(TAG, e.toString());
}
return aString;
}
@Override
protected void onPostExecute(String result) {
// result is what you got from your connection
aTextView.setText(result);
}
}
How to call it:
ConnectionTask task = new ConnectionTask();
String[] params = new String[2];
params[0] = url;
params[1] = somethingelseifneeded;
task.execute(params);
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