Android 常用代码---WEB

1	执行 GET 请求
权限		<uses-permission android:name="android.permission.INTERNET"/>
代码		URI myURI = null;
try {
myURI = new URI("www.webserver.org");
} catch (URISyntaxException e) {
// Deal with it
}
HttpClient httpClient = new DefaultHttpClient();
HttpGet getMethod = new HttpGet(myURI);
HttpResponse webServerResponse = null;
try {
webServerResponse = httpClient.execute(getMethod);
} catch (ClientProtocolException e) {
// Deal with it
} catch (IOException e) {
// Deal with it
}
HttpEntity httpEntity = webServerResponse.getEntity();
if (httpEntity != null) {
// You have your response, handle it. For instance, with a input
// stream
// InputStream input = entity.getContent();
}
2	执行 POST 请求
权限		<uses-permission android:name="android.permission.INTERNET"/>
代码		// Create the Apache HTTP client and post
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.website.org/service.php");
try {
// Add data to your post
List<NameValuePair> pairs = new ArrayList<NameValuePair>(2);
pairs.add(new BasicNameValuePair("ID", "VALUE"));
pairs.add(new BasicNameValuePair("string", "Yeah!"));
httppost.setEntity(new UrlEncodedFormEntity(pairs));
//Finally, execute the request
HttpResponse webServerAnswer = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
//Deal with it
} catch (IOException e) {
//Deal with it
}
3	从服务器响应检索 JSON
权限		<uses-permission android:name="android.permission.INTERNET"/>
代码		// The JSON objects
JSONObject myJSON = null;
JSONArray names = null;
JSONArray values = null;
String restWebServerResponse = "TheResponse";
try{
myJSON = new JSONObject(restWebServerResponse);
names = myJSON.names();
values = myJSON.toJSONArray(names);
}
catch (JSONException e) {
// Deal with it
}
for (int i = 0; i < values.length(); i++) {
// Do something with the values.getString(i)
}
4	使用 GET 请求查询 Web 服务器中的 REST 响应
权限		<uses-permission android:name="android.permission.INTERNET"/>
代码		// This assumes that you have a URL from which to get the answer
URI myURL = new URI("www.website.org");
// The HTTP objects
HttpClient httpClient = new DefaultHttpClient();
HttpGet getMethod = new HttpGet(myURL);
HttpResponse httpResponse;
// The query result
String result = null;
try {
httpResponse = httpClient.execute(getMethod);
// You might want to check response.getStatusLine().toString()
HttpEntity entity = httpResponse.getEntity();
if (entity != null) {
InputStream instream = entity.getContent();
BufferedReader reader = new BufferedReader( new InputStreamReader(instream));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
// Deal with it
} finally {
try {
instream.close();
} catch (IOException e) {
// Deal with it
}
}
// Handle the result (for instance, get a JSON object
// using the "Retrieve JSON from a server response" snippet)
handleResult(result);
}
} catch (ClientProtocolException e) {
// Deal with it
} catch (IOException e) {
// Deal with it
}
5	发送电子邮件
权限		<uses-permission android:name="android.permission.INTERNET"/>
代码		Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
emailIntent.setType("plain/text");
emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{"to@email.com"});
emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Hello, MOTO!");
emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, "Hello, MOTO!");
startActivity(Intent.createChooser(emailIntent, "Send mail..."));
6	从 URL 检索日期
权限		<uses-permission android:name="android.permission.INTERNET"/>
代码		// The data that is retrieved
String result = null;
try {
// This assumes that you have a URL from which the response will come
URL url = new URL("www.webaddress.org");
// Open a connection to the URL and obtain a buffered input stream
URLConnection connection = url.openConnection();
InputStream inputStream = connection.getInputStream();
BufferedInputStream bufferedInput = new BufferedInputStream(inputStream);
// Read the response into a byte array
ByteArrayBuffer byteArray = new ByteArrayBuffer(50);
int current = 0;
while((current = bufferedInput.read()) != -1){
byteArray.append((byte)current);
}
// Construct a String object from the byte array containing the response
result = new String(byteArray.toByteArray());
} catch (Exception e) {
}
// Handle the result
handleResult(result);
7	SOAP 示例
权限		<uses-permission android:name="android.permission.INTERNET"/>
代码		/* This example is intended to be used with the KSoap
* project (http://ksoap2.sourceforge.net/), which
* provides some objects to deal with SOAP within
* mobile development.
*
* You must download the KSoap objects and
* have something like this in your import list:
* import org.ksoap2.SoapEnvelope; // (and other necessary classes)
*/
String SOAP_ACTION = "yourMethod";
String METHOD_NAME = "yourMethod";
String NAMESPACE = "http://namespace.com/";
String URL = "http://server.org";
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
request.addProperty("property1", "property");
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
androidHttpTransport.call(SOAP_ACTION, envelope);
Object results = envelope.getResponse();
// Handle the results
handleResults(results);