这里有一个非常棒的http通讯的总结,我看了以后茅塞顿开。
先贴代码:
01 |
public class Activity1 extends Activity { |
03 |
private final String DEBUG_TAG = "System.out"; |
05 |
private TextView mTextView; |
06 |
private Button mButton; |
08 |
protected void onCreate(Bundle savedInstanceState) { |
09 |
super.onCreate(savedInstanceState); |
10 |
setContentView(R.layout.main); |
12 |
mTextView = (TextView) findViewById(R.id.TextView01); |
13 |
mButton = (Button) findViewById(R.id.Button01); |
14 |
mButton.setOnClickListener(new httpListener()); |
18 |
class httpListener implements OnClickListener { |
19 |
public void onClick(View v) { |
24 |
private void refresh() { |
25 |
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp"; |
28 |
// "http://192.168.0.101:8080/Test/test.jsp?par=abcdefg"; |
29 |
String resultData = ""; |
33 |
url = new URL(httpUrl); |
34 |
} catch (MalformedURLException e) { |
35 |
Log.d(DEBUG_TAG, "create URL Exception"); |
37 |
// 声明HttpURLConnection对象 |
38 |
HttpURLConnection urlConn = null; |
39 |
// 声明InputStreamReader对象 |
40 |
InputStreamReader in = null; |
42 |
BufferedReader buffer = null; |
43 |
String inputLine = null; |
46 |
// 使用HttpURLConnection打开连接 |
47 |
urlConn = (HttpURLConnection) url.openConnection(); |
49 |
in = new InputStreamReader(urlConn.getInputStream()); |
50 |
// 创建BufferReader对象,输出时候用到 |
51 |
buffer = new BufferedReader(in); |
53 |
while ((inputLine = buffer.readLine()) != null) { |
55 |
resultData += inputLine + "\n"; |
58 |
if (resultData != null && !resultData.equals("")) { |
59 |
mTextView.setText(resultData); |
61 |
mTextView.setText("读取的内容为空"); |
63 |
} catch (IOException e) { |
67 |
// 关闭InputStreamReader |
71 |
} catch (IOException e) { |
76 |
Log.d(DEBUG_TAG, "URL is NULL"); |
第二种方式:
001 |
public class Activity2 extends Activity { |
003 |
private final String DEBUG_TAG = "System.out"; |
005 |
private TextView mTextView; |
006 |
private Button mButton; |
008 |
protected void onCreate(Bundle savedInstanceState) { |
009 |
super.onCreate(savedInstanceState); |
010 |
setContentView(R.layout.main); |
012 |
mTextView = (TextView) findViewById(R.id.TextView01); |
013 |
mButton = (Button) findViewById(R.id.Button01); |
014 |
mButton.setOnClickListener(new httpListener()); |
018 |
class httpListener implements OnClickListener { |
019 |
public void onClick(View v) { |
024 |
private void refresh() { |
025 |
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp"; |
026 |
String resultData = ""; |
030 |
url = new URL(httpUrl); |
031 |
} catch (MalformedURLException e) { |
032 |
Log.d(DEBUG_TAG, "create URL Exception"); |
034 |
// 声明HttpURLConnection对象 |
035 |
HttpURLConnection urlConn = null; |
036 |
// 声明InputStreamReader对象 |
037 |
InputStreamReader in = null; |
038 |
// 声明BufferedReader对象 |
039 |
BufferedReader buffer = null; |
040 |
String inputLine = null; |
041 |
// 声明DataOutputStream流 |
042 |
DataOutputStream out = null; |
045 |
// 使用HttpURLConnection打开连接 |
046 |
urlConn = (HttpURLConnection) url.openConnection(); |
047 |
// 因为这个是POST请求所以要设置为true |
048 |
urlConn.setDoInput(true); |
049 |
urlConn.setDoOutput(true); |
051 |
urlConn.setRequestMethod("POST"); |
053 |
urlConn.setUseCaches(false); |
054 |
urlConn.setInstanceFollowRedirects(false); |
055 |
// 配置本次连接的Content-type,配置为application/x-www-form-urlencoded的 |
056 |
urlConn.setRequestProperty("Content-Type","application/x-www-form-urlencoded"); |
057 |
// 连接,从postUrl.openConnection()至此的配置必须要在connect之前完成 |
058 |
// 要注意的是connectio.getOutputStream会隐含的进行connect |
061 |
out = new DataOutputStream(urlConn.getOutputStream()); |
062 |
String content = "par=" + URLEncoder.encode("abcdefg","gb2312"); |
064 |
out.writeBytes(content); |
066 |
in = new InputStreamReader(urlConn.getInputStream()); |
067 |
// 创建BufferReader对象,输出时候用到 |
068 |
buffer = new BufferedReader(in); |
070 |
while ((inputLine = buffer.readLine()) != null) { |
072 |
resultData += inputLine + "\n"; |
075 |
if (resultData != null && !resultData.equals("")) { |
076 |
mTextView.setText(resultData); |
078 |
mTextView.setText("读取的内容为空"); |
080 |
} catch (IOException e) { |
084 |
// 刷新DataOutputStream流 |
086 |
// 关闭DataOutputStream流 |
088 |
// 关闭InputStreamReader |
091 |
urlConn.disconnect(); |
092 |
} catch (IOException e) { |
097 |
Log.d(DEBUG_TAG, "URL is NULL"); |
第三种方式
01 |
public class Activity3 extends Activity{ |
02 |
private TextView mTextView; |
03 |
private Button mButton; |
05 |
protected void onCreate(Bundle savedInstanceState) { |
06 |
super.onCreate(savedInstanceState); |
07 |
setContentView(R.layout.main); |
08 |
mTextView = (TextView) findViewById(R.id.TextView01); |
09 |
mButton = (Button) findViewById(R.id.Button01); |
10 |
mButton.setOnClickListener(new httpListener()); |
14 |
class httpListener implements OnClickListener { |
15 |
public void onClick(View v) { |
16 |
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp?par=HttpClient_android_Get"; |
18 |
HttpGet httpRequest = new HttpGet(httpUrl); |
21 |
HttpClient httpclient = new DefaultHttpClient(); |
22 |
// 请求HttpClient,取的HttpResponse |
23 |
HttpResponse httpResponse = httpclient.execute(httpRequest); |
25 |
if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { |
27 |
String strResult = EntityUtils.toString(httpResponse.getEntity()); |
29 |
// 在TextView要显示的文字过滤掉回车符("\r")就可以正常显示了。 |
30 |
String strsResult = strResult.replace("\r", ""); |
31 |
mTextView.setText(strsResult); |
33 |
mTextView.setText("请求错误"); |
35 |
} catch (ClientProtocolException e) { |
36 |
mTextView.setText(e.getMessage().toString()); |
37 |
} catch (IOException e) { |
38 |
mTextView.setText(e.getMessage().toString()); |
39 |
} catch (Exception e) { |
40 |
mTextView.setText(e.getMessage().toString()); |
第四种方式
01 |
public class Activity4 extends Activity{ |
02 |
private TextView mTextView; |
03 |
private Button mButton; |
05 |
protected void onCreate(Bundle savedInstanceState) { |
06 |
super.onCreate(savedInstanceState); |
07 |
setContentView(R.layout.main); |
08 |
mTextView = (TextView) findViewById(R.id.TextView01); |
09 |
mButton = (Button) findViewById(R.id.Button01); |
10 |
mButton.setOnClickListener(new httpListener()); |
14 |
class httpListener implements OnClickListener { |
15 |
public void onClick(View arg0) { |
16 |
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp"; |
18 |
HttpPost httpRequest = new HttpPost(httpUrl); |
19 |
// 使用NameValuePair来保存要传递的Post参数 |
20 |
List params = new ArrayList(); |
22 |
params.add(new BasicNameValuePair("par","HttpClient_android_Post")); |
25 |
HttpEntity httpentity = newUrlEncodedFormEntity(params,"gb2312"); |
27 |
httpRequest.setEntity(httpentity); |
29 |
HttpClient httpclient = new DefaultHttpClient(); |
31 |
HttpResponse httpResponse = httpclient.execute(httpRequest); |
32 |
// HttpStatus.SC_OK表示连接成功 |
33 |
if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { |
35 |
String strResult = EntityUtils.toString(httpResponse.getEntity()); |
37 |
// 在TextView要显示的文字过滤掉回车符("\r")就可以正常显示了。 |
38 |
String strsResult = strResult.replace("\r", ""); |
39 |
mTextView.setText(strsResult); |
41 |
mTextView.setText("请求错误"); |
43 |
} catch (ClientProtocolException e) { |
44 |
mTextView.setText(e.getMessage().toString()); |
45 |
} catch (IOException e) { |
46 |
mTextView.setText(e.getMessage().toString()); |
47 |
} catch (Exception e) { |
48 |
mTextView.setText(e.getMessage().toString()); |
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