Android 网络通讯之HTTP请求通信
2016-09-23 23:02
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Android网络通讯平台支持还是比较丰富的，除了兼容J2ME中的java.netapi外还提供了一下Android平台独有的类android.net这个Package。一种是GET方式，一种是POST方式。然后HttpClient的Get/Post方式。似乎更强大的是org.apache.http类，这个是apache实验室开源的包，对于Http请求处理很方便。
android 向web服务器发送post请求并获取结果，因为 需要访问到网络必须要有权限，先在AndroidManifest.xml中加入如下配置：
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<uses-permission android:name="android.permission.INTERNET"/>
1.发送post请求并获取结果的activity 代码如下(结果返回1(成功)或-1(失败0))：
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btnOK.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View view) {
String url="http://192.168.123.7:8900/Login.aspx";
HttpPost httpRequest=null;
List<NameValuePair> params=null;
HttpResponse httpResponse=null;
//建立HttpPost链接
httpRequest=new HttpPost(url);
//Post操作参数必须使用NameValuePair[]阵列储存
params=new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("domain",domain.getText().toString()));
params.add(new BasicNameValuePair("uid",uid.getText().toString()));
params.add(new BasicNameValuePair("pwd",pwd.getText().toString()));
try
{
//发送Http Request
httpRequest.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));
//取得Http Response
httpResponse=new DefaultHttpClient().execute(httpRequest);
//若状态码为200
if(httpResponse.getStatusLine().getStatusCode()==200)
{
//获得返回的数据
String strResult=EntityUtils.toString(httpResponse.getEntity());
if(strResult.equalsIgnoreCase("1"))
{
// openDialog("登入成功!");
new AlertDialog.Builder(Login.this)
.setTitle("提示").setMessage("登入成功!")
.setPositiveButton("确定",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
// 跳转到另一个Acitivity并传值
Intent intent=new Intent();
intent.putExtra("curUserId",domain.getText().toString()+"/"+ uid.getText().toString());
intent.setClass(Login.this, Holiday.class);
Login.this.startActivity(intent);
}
}).show();
}
else if(strResult.equalsIgnoreCase("0"))
{
openDialog("您输入的信息有误!");
}
}
else
{
openDialog("Error!");
}
}
catch(Exception e)
{
e.printStackTrace();
}
}});
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String url = "XXXXXXX";
HttpClient httpClient = new DefaultHttpClient();
//创建HttpGet对象
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse;
try
{
//使用execute方法发送 HttpGet请求，并返回httRresponse对象
httpResponse = httpClient.execute(httpGet);
int statusCode = httpResponse.getStatusLine().getStatusCode();
if(statusCode==HttpStatus.SC_OK)
{
//获得返回结果
response=EntityUtils.toString(httpResponse.getEntity());
}
} catch (ClientProtocolException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
return response;
一，GET方式
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public class Activity01 extends Activity {
private final String DEBUG_TAG = "System.out";
private TextView mTextView ;
private Button mButton;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
mTextView = (TextView)findViewById(R.id.TextView01);
mButton = (Button)findViewById(R.id.Button01);
mButton.setOnClickListener(new httpListener());
}
//设置按钮监听器
class httpListener implements OnClickListener{
public void onClick(View v) {
refresh();
}
}
private void refresh(){
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp";
//URL可以加参数
//String httpUrl = "http://192.168.0.101:8080/Test/test.jsp?par=abcdefg";
String resultData = "";
URL url = null;
try{
//创建一个URL对象
url = new URL(httpUrl);
}catch(MalformedURLException e){
Log.d(DEBUG_TAG, "create URL Exception");
}
//声明HttpURLConnection对象
HttpURLConnection urlConn = null;
//声明InputStreamReader对象
InputStreamReader in = null;
//声明BufferedReader对象
BufferedReader buffer = null;
String inputLine = null;
if(url != null){
try{
//使用HttpURLConnection打开连接
urlConn = (HttpURLConnection) url.openConnection();
//得到读取的内容(流)
in = new InputStreamReader(urlConn.getInputStream());
//创建BufferReader对象，输出时候用到
buffer = new BufferedReader(in);
//使用循环来读取数据
while ((inputLine = buffer.readLine()) != null) {
//在每一行后面加上换行
resultData += inputLine + "\n";
}
//设置显示取的的内容
if(resultData != null && !resultData.equals("")){
mTextView.setText(resultData);
}else{
mTextView.setText("读取的内容为空");
}
}catch(IOException e){
e.printStackTrace();
}finally{
try {
//关闭InputStreamReader
in.close();
//关闭URL连接
urlConn.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
}else{
Log.d(DEBUG_TAG, "URL is NULL");
}
}
}
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public class Activity03 extends Activity {
private final String DEBUG_TAG = "System.out";
private TextView mTextView ;
private Button mButton;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
mTextView = (TextView)findViewById(R.id.TextView01);
mButton = (Button)findViewById(R.id.Button01);
mButton.setOnClickListener(new httpListener());
}
//设置按钮监听器
class httpListener implements OnClickListener{
public void onClick(View v) {
refresh();
}
}
private void refresh(){
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp";
String resultData = "";
URL url = null;
try{
//创建一个URL对象
url = new URL(httpUrl);
}catch(MalformedURLException e){
Log.d(DEBUG_TAG, "create URL Exception");
}
//声明HttpURLConnection对象
HttpURLConnection urlConn = null;
//声明InputStreamReader对象
InputStreamReader in = null;
//声明BufferedReader对象
BufferedReader buffer = null;
String inputLine = null;
//声明DataOutputStream流
DataOutputStream out = null;
if(url != null){
try{
//使用HttpURLConnection打开连接
urlConn = (HttpURLConnection) url.openConnection();
//因为这个是POST请求所以要设置为true
urlConn.setDoInput(true);
urlConn.setDoOutput(true);
//设置POST方式
urlConn.setRequestMethod("POST");
//POST请求不能设置缓存
urlConn.setUseCaches(false);
urlConn.setInstanceFollowRedirects(false);
//配置本次连接的Content-type，配置为application/x-www-form-urlencoded的
urlConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
//连接，从postUrl.openConnection()至此的配置必须要在connect之前完成
//要注意的是connectio.getOutputStream会隐含的进行connect
urlConn.connect();
//DataOutputStream流
out = new DataOutputStream(urlConn.getOutputStream());
String content = "par=" + URLEncoder.encode("abcdefg","gb2312");
//将要上传的内容写入流中
out.writeBytes(content);
//得到读取的内容(流)
in = new InputStreamReader(urlConn.getInputStream());
//创建BufferReader对象，输出时候用到
buffer = new BufferedReader(in);
//使用循环来读取数据
while ((inputLine = buffer.readLine()) != null) {
//在每一行后面加上换行
resultData += inputLine + "\n";
}
//设置显示取的的内容
if(resultData != null && !resultData.equals("")){
mTextView.setText(resultData);
}else{
mTextView.setText("读取的内容为空");
}
}catch(IOException e){
e.printStackTrace();
}finally{
try {
//刷新DataOutputStream流
out.flush();
//关闭DataOutputStream流
out.close();
//关闭InputStreamReader
in.close();
//关闭URL连接
urlConn.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
}else{
Log.d(DEBUG_TAG, "URL is NULL");
}
}
}
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public class Activity04 extends Activity {
private TextView mTextView ;
private Button mButton;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
mTextView = (TextView)findViewById(R.id.TextView01);
mButton = (Button)findViewById(R.id.Button01);
mButton.setOnClickListener(new httpListener());
}
//设置按钮监听器
class httpListener implements OnClickListener{
public void onClick(View v) {
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp?par=HttpClient_android_Get";
//HttpGet连接对象
HttpGet httpRequest = new HttpGet(httpUrl);
try{
//取的HttpClient对象
HttpClient httpclient = new DefaultHttpClient();
//请求HttpClient，取的HttpResponse
HttpResponse httpResponse = httpclient.execute(httpRequest);
//请求成功
if(httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
//取的返回的字符串
String strResult = EntityUtils.toString(httpResponse.getEntity()); //这个返回值可能会在行尾出现小方格
//在TextView要显示的文字过滤掉回车符（"\r"）就可以正常显示了。
String strsResult = strResult.replace("\r", "");
mTextView.setText(strsResult);
}else{
mTextView.setText("请求错误");
}
}catch(ClientProtocolException e){
mTextView.setText(e.getMessage().toString());
}catch(IOException e){
mTextView.setText(e.getMessage().toString());
}catch(Exception e){
mTextView.setText(e.getMessage().toString());
}
}
}
}
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public class Activity05 extends Activity {
private TextView mTextView ;
private Button mButton;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
mTextView = (TextView)findViewById(R.id.TextView01);
mButton = (Button)findViewById(R.id.Button01);
mButton.setOnClickListener(new httpListener());
}
//设置按钮监听器
class httpListener implements OnClickListener{
public void onClick(View arg0) {
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp";
//创建HttpPost连接对象
HttpPost httpRequest = new HttpPost(httpUrl);
//使用NameValuePair来保存要传递的Post参数
List<NameValuePair> params = new ArrayList<NameValuePair>();
//添加要传递的参数
params.add(new BasicNameValuePair("par","HttpClient_android_Post"));
try{
//设置字符集
HttpEntity httpentity = new UrlEncodedFormEntity(params,"gb2312");
//请求httpRequest
httpRequest.setEntity(httpentity);
//取的默认的HttpClient
HttpClient httpclient = new DefaultHttpClient();
//取的HttpResponse
HttpResponse httpResponse = httpclient.execute(httpRequest);
//HttpStatus.SC_OK表示连接成功
if(httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
//取的返回的字符串
String strResult = EntityUtils.toString(httpResponse.getEntity());//这个返回值可能会在行尾出现小方格
//在TextView要显示的文字过滤掉回车符（"\r"）就可以正常显示了。
String strsResult = strResult.replace("\r", "");
mTextView.setText(strsResult);
}else{
mTextView.setText("请求错误");
}
}catch(ClientProtocolException e){
mTextView.setText(e.getMessage().toString());
}catch(IOException e){
mTextView.setText(e.getMessage().toString());
}catch(Exception e){
mTextView.setText(e.getMessage().toString());
}
}
}
}
Android网络通讯平台支持还是比较丰富的，除了兼容J2ME中的java.netapi外还提供了一下Android平台独有的类android.net这个Package。一种是GET方式，一种是POST方式。然后HttpClient的Get/Post方式。似乎更强大的是org.apache.http类，这个是apache实验室开源的包，对于Http请求处理很方便。
android 向web服务器发送post请求并获取结果，因为 需要访问到网络必须要有权限，先在AndroidManifest.xml中加入如下配置：
[java]
view plain
copy
print?
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.INTERNET"/>
1.发送post请求并获取结果的activity 代码如下(结果返回1(成功)或-1(失败0))：
[java]
view plain
copy
print?
btnOK.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View view) {
String url="http://192.168.123.7:8900/Login.aspx";
HttpPost httpRequest=null;
List<NameValuePair> params=null;
HttpResponse httpResponse=null;
//建立HttpPost链接
httpRequest=new HttpPost(url);
//Post操作参数必须使用NameValuePair[]阵列储存
params=new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("domain",domain.getText().toString()));
params.add(new BasicNameValuePair("uid",uid.getText().toString()));
params.add(new BasicNameValuePair("pwd",pwd.getText().toString()));
try
{
//发送Http Request
httpRequest.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));
//取得Http Response
httpResponse=new DefaultHttpClient().execute(httpRequest);
//若状态码为200
if(httpResponse.getStatusLine().getStatusCode()==200)
{
//获得返回的数据
String strResult=EntityUtils.toString(httpResponse.getEntity());
if(strResult.equalsIgnoreCase("1"))
{
// openDialog("登入成功!");
new AlertDialog.Builder(Login.this)
.setTitle("提示").setMessage("登入成功!")
.setPositiveButton("确定",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
// 跳转到另一个Acitivity并传值
Intent intent=new Intent();
intent.putExtra("curUserId",domain.getText().toString()+"/"+ uid.getText().toString());
intent.setClass(Login.this, Holiday.class);
Login.this.startActivity(intent);
}
}).show();
}
else if(strResult.equalsIgnoreCase("0"))
{
openDialog("您输入的信息有误!");
}
}
else
{
openDialog("Error!");
}
}
catch(Exception e)
{
e.printStackTrace();
}
}});
btnOK.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View view) {
String url="http://192.168.123.7:8900/Login.aspx";
HttpPost httpRequest=null;
List<NameValuePair> params=null;
HttpResponse httpResponse=null;
//建立HttpPost链接
httpRequest=new HttpPost(url);
//Post操作参数必须使用NameValuePair[]阵列储存
params=new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("domain",domain.getText().toString()));
params.add(new BasicNameValuePair("uid",uid.getText().toString()));
params.add(new BasicNameValuePair("pwd",pwd.getText().toString()));
try
{
//发送Http Request
httpRequest.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));
//取得Http Response
httpResponse=new DefaultHttpClient().execute(httpRequest);
//若状态码为200
if(httpResponse.getStatusLine().getStatusCode()==200)
{
//获得返回的数据
String strResult=EntityUtils.toString(httpResponse.getEntity());
if(strResult.equalsIgnoreCase("1"))
{
// openDialog("登入成功!");
new AlertDialog.Builder(Login.this)
.setTitle("提示").setMessage("登入成功!")
.setPositiveButton("确定",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
// 跳转到另一个Acitivity并传值
Intent intent=new Intent();
intent.putExtra("curUserId",domain.getText().toString()+"/"+ uid.getText().toString());
intent.setClass(Login.this, Holiday.class);
Login.this.startActivity(intent);
}
}).show();
}
else if(strResult.equalsIgnoreCase("0"))
{
openDialog("您输入的信息有误!");
}
}
else
{
openDialog("Error!");
}
}
catch(Exception e)
{
e.printStackTrace();
}
}});2.HttpClient的Get方式发送请求到服务器[java]
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String url = "XXXXXXX";
HttpClient httpClient = new DefaultHttpClient();
//创建HttpGet对象
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse;
try
{
//使用execute方法发送 HttpGet请求，并返回httRresponse对象
httpResponse = httpClient.execute(httpGet);
int statusCode = httpResponse.getStatusLine().getStatusCode();
if(statusCode==HttpStatus.SC_OK)
{
//获得返回结果
response=EntityUtils.toString(httpResponse.getEntity());
}
} catch (ClientProtocolException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
return response;
String url = "XXXXXXX";
HttpClient httpClient = new DefaultHttpClient();
//创建HttpGet对象
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse;
try
{
//使用execute方法发送 HttpGet请求，并返回httRresponse对象
httpResponse = httpClient.execute(httpGet);
int statusCode = httpResponse.getStatusLine().getStatusCode();
if(statusCode==HttpStatus.SC_OK)
{
//获得返回结果
response=EntityUtils.toString(httpResponse.getEntity());
}
} catch (ClientProtocolException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
return response;一，GET方式
[java]
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public class Activity01 extends Activity {
private final String DEBUG_TAG = "System.out";
private TextView mTextView ;
private Button mButton;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
mTextView = (TextView)findViewById(R.id.TextView01);
mButton = (Button)findViewById(R.id.Button01);
mButton.setOnClickListener(new httpListener());
}
//设置按钮监听器
class httpListener implements OnClickListener{
public void onClick(View v) {
refresh();
}
}
private void refresh(){
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp";
//URL可以加参数
//String httpUrl = "http://192.168.0.101:8080/Test/test.jsp?par=abcdefg";
String resultData = "";
URL url = null;
try{
//创建一个URL对象
url = new URL(httpUrl);
}catch(MalformedURLException e){
Log.d(DEBUG_TAG, "create URL Exception");
}
//声明HttpURLConnection对象
HttpURLConnection urlConn = null;
//声明InputStreamReader对象
InputStreamReader in = null;
//声明BufferedReader对象
BufferedReader buffer = null;
String inputLine = null;
if(url != null){
try{
//使用HttpURLConnection打开连接
urlConn = (HttpURLConnection) url.openConnection();
//得到读取的内容(流)
in = new InputStreamReader(urlConn.getInputStream());
//创建BufferReader对象，输出时候用到
buffer = new BufferedReader(in);
//使用循环来读取数据
while ((inputLine = buffer.readLine()) != null) {
//在每一行后面加上换行
resultData += inputLine + "\n";
}
//设置显示取的的内容
if(resultData != null && !resultData.equals("")){
mTextView.setText(resultData);
}else{
mTextView.setText("读取的内容为空");
}
}catch(IOException e){
e.printStackTrace();
}finally{
try {
//关闭InputStreamReader
in.close();
//关闭URL连接
urlConn.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
}else{
Log.d(DEBUG_TAG, "URL is NULL");
}
}
}
public class Activity01 extends Activity {
private final String DEBUG_TAG = "System.out";
private TextView mTextView ;
private Button mButton;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
mTextView = (TextView)findViewById(R.id.TextView01);
mButton = (Button)findViewById(R.id.Button01);
mButton.setOnClickListener(new httpListener());
}
//设置按钮监听器
class httpListener implements OnClickListener{
public void onClick(View v) {
refresh();
}
}
private void refresh(){
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp";
//URL可以加参数
//String httpUrl = "http://192.168.0.101:8080/Test/test.jsp?par=abcdefg";
String resultData = "";
URL url = null;
try{
//创建一个URL对象
url = new URL(httpUrl);
}catch(MalformedURLException e){
Log.d(DEBUG_TAG, "create URL Exception");
}
//声明HttpURLConnection对象
HttpURLConnection urlConn = null;
//声明InputStreamReader对象
InputStreamReader in = null;
//声明BufferedReader对象
BufferedReader buffer = null;
String inputLine = null;
if(url != null){
try{
//使用HttpURLConnection打开连接
urlConn = (HttpURLConnection) url.openConnection();
//得到读取的内容(流)
in = new InputStreamReader(urlConn.getInputStream());
//创建BufferReader对象，输出时候用到
buffer = new BufferedReader(in);
//使用循环来读取数据
while ((inputLine = buffer.readLine()) != null) {
//在每一行后面加上换行
resultData += inputLine + "\n";
}
//设置显示取的的内容
if(resultData != null && !resultData.equals("")){
mTextView.setText(resultData);
}else{
mTextView.setText("读取的内容为空");
}
}catch(IOException e){
e.printStackTrace();
}finally{
try {
//关闭InputStreamReader
in.close();
//关闭URL连接
urlConn.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
}else{
Log.d(DEBUG_TAG, "URL is NULL");
}
}
}二，POST方式[java]
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public class Activity03 extends Activity {
private final String DEBUG_TAG = "System.out";
private TextView mTextView ;
private Button mButton;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
mTextView = (TextView)findViewById(R.id.TextView01);
mButton = (Button)findViewById(R.id.Button01);
mButton.setOnClickListener(new httpListener());
}
//设置按钮监听器
class httpListener implements OnClickListener{
public void onClick(View v) {
refresh();
}
}
private void refresh(){
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp";
String resultData = "";
URL url = null;
try{
//创建一个URL对象
url = new URL(httpUrl);
}catch(MalformedURLException e){
Log.d(DEBUG_TAG, "create URL Exception");
}
//声明HttpURLConnection对象
HttpURLConnection urlConn = null;
//声明InputStreamReader对象
InputStreamReader in = null;
//声明BufferedReader对象
BufferedReader buffer = null;
String inputLine = null;
//声明DataOutputStream流
DataOutputStream out = null;
if(url != null){
try{
//使用HttpURLConnection打开连接
urlConn = (HttpURLConnection) url.openConnection();
//因为这个是POST请求所以要设置为true
urlConn.setDoInput(true);
urlConn.setDoOutput(true);
//设置POST方式
urlConn.setRequestMethod("POST");
//POST请求不能设置缓存
urlConn.setUseCaches(false);
urlConn.setInstanceFollowRedirects(false);
//配置本次连接的Content-type，配置为application/x-www-form-urlencoded的
urlConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
//连接，从postUrl.openConnection()至此的配置必须要在connect之前完成
//要注意的是connectio.getOutputStream会隐含的进行connect
urlConn.connect();
//DataOutputStream流
out = new DataOutputStream(urlConn.getOutputStream());
String content = "par=" + URLEncoder.encode("abcdefg","gb2312");
//将要上传的内容写入流中
out.writeBytes(content);
//得到读取的内容(流)
in = new InputStreamReader(urlConn.getInputStream());
//创建BufferReader对象，输出时候用到
buffer = new BufferedReader(in);
//使用循环来读取数据
while ((inputLine = buffer.readLine()) != null) {
//在每一行后面加上换行
resultData += inputLine + "\n";
}
//设置显示取的的内容
if(resultData != null && !resultData.equals("")){
mTextView.setText(resultData);
}else{
mTextView.setText("读取的内容为空");
}
}catch(IOException e){
e.printStackTrace();
}finally{
try {
//刷新DataOutputStream流
out.flush();
//关闭DataOutputStream流
out.close();
//关闭InputStreamReader
in.close();
//关闭URL连接
urlConn.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
}else{
Log.d(DEBUG_TAG, "URL is NULL");
}
}
}
public class Activity03 extends Activity {
private final String DEBUG_TAG = "System.out";
private TextView mTextView ;
private Button mButton;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
mTextView = (TextView)findViewById(R.id.TextView01);
mButton = (Button)findViewById(R.id.Button01);
mButton.setOnClickListener(new httpListener());
}
//设置按钮监听器
class httpListener implements OnClickListener{
public void onClick(View v) {
refresh();
}
}
private void refresh(){
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp";
String resultData = "";
URL url = null;
try{
//创建一个URL对象
url = new URL(httpUrl);
}catch(MalformedURLException e){
Log.d(DEBUG_TAG, "create URL Exception");
}
//声明HttpURLConnection对象
HttpURLConnection urlConn = null;
//声明InputStreamReader对象
InputStreamReader in = null;
//声明BufferedReader对象
BufferedReader buffer = null;
String inputLine = null;
//声明DataOutputStream流
DataOutputStream out = null;
if(url != null){
try{
//使用HttpURLConnection打开连接
urlConn = (HttpURLConnection) url.openConnection();
//因为这个是POST请求所以要设置为true
urlConn.setDoInput(true);
urlConn.setDoOutput(true);
//设置POST方式
urlConn.setRequestMethod("POST");
//POST请求不能设置缓存
urlConn.setUseCaches(false);
urlConn.setInstanceFollowRedirects(false);
//配置本次连接的Content-type，配置为application/x-www-form-urlencoded的
urlConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
//连接，从postUrl.openConnection()至此的配置必须要在connect之前完成
//要注意的是connectio.getOutputStream会隐含的进行connect
urlConn.connect();
//DataOutputStream流
out = new DataOutputStream(urlConn.getOutputStream());
String content = "par=" + URLEncoder.encode("abcdefg","gb2312");
//将要上传的内容写入流中
out.writeBytes(content);
//得到读取的内容(流)
in = new InputStreamReader(urlConn.getInputStream());
//创建BufferReader对象，输出时候用到
buffer = new BufferedReader(in);
//使用循环来读取数据
while ((inputLine = buffer.readLine()) != null) {
//在每一行后面加上换行
resultData += inputLine + "\n";
}
//设置显示取的的内容
if(resultData != null && !resultData.equals("")){
mTextView.setText(resultData);
}else{
mTextView.setText("读取的内容为空");
}
}catch(IOException e){
e.printStackTrace();
}finally{
try {
//刷新DataOutputStream流
out.flush();
//关闭DataOutputStream流
out.close();
//关闭InputStreamReader
in.close();
//关闭URL连接
urlConn.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
}else{
Log.d(DEBUG_TAG, "URL is NULL");
}
}
}三，HttpClient的Get方式[java]
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public class Activity04 extends Activity {
private TextView mTextView ;
private Button mButton;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
mTextView = (TextView)findViewById(R.id.TextView01);
mButton = (Button)findViewById(R.id.Button01);
mButton.setOnClickListener(new httpListener());
}
//设置按钮监听器
class httpListener implements OnClickListener{
public void onClick(View v) {
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp?par=HttpClient_android_Get";
//HttpGet连接对象
HttpGet httpRequest = new HttpGet(httpUrl);
try{
//取的HttpClient对象
HttpClient httpclient = new DefaultHttpClient();
//请求HttpClient，取的HttpResponse
HttpResponse httpResponse = httpclient.execute(httpRequest);
//请求成功
if(httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
//取的返回的字符串
String strResult = EntityUtils.toString(httpResponse.getEntity()); //这个返回值可能会在行尾出现小方格
//在TextView要显示的文字过滤掉回车符（"\r"）就可以正常显示了。
String strsResult = strResult.replace("\r", "");
mTextView.setText(strsResult);
}else{
mTextView.setText("请求错误");
}
}catch(ClientProtocolException e){
mTextView.setText(e.getMessage().toString());
}catch(IOException e){
mTextView.setText(e.getMessage().toString());
}catch(Exception e){
mTextView.setText(e.getMessage().toString());
}
}
}
}
public class Activity04 extends Activity {
private TextView mTextView ;
private Button mButton;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
mTextView = (TextView)findViewById(R.id.TextView01);
mButton = (Button)findViewById(R.id.Button01);
mButton.setOnClickListener(new httpListener());
}
//设置按钮监听器
class httpListener implements OnClickListener{
public void onClick(View v) {
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp?par=HttpClient_android_Get";
//HttpGet连接对象
HttpGet httpRequest = new HttpGet(httpUrl);
try{
//取的HttpClient对象
HttpClient httpclient = new DefaultHttpClient();
//请求HttpClient，取的HttpResponse
HttpResponse httpResponse = httpclient.execute(httpRequest);
//请求成功
if(httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
//取的返回的字符串
String strResult = EntityUtils.toString(httpResponse.getEntity()); //这个返回值可能会在行尾出现小方格
//在TextView要显示的文字过滤掉回车符（"\r"）就可以正常显示了。
String strsResult = strResult.replace("\r", "");
mTextView.setText(strsResult);
}else{
mTextView.setText("请求错误");
}
}catch(ClientProtocolException e){
mTextView.setText(e.getMessage().toString());
}catch(IOException e){
mTextView.setText(e.getMessage().toString());
}catch(Exception e){
mTextView.setText(e.getMessage().toString());
}
}
}
}四，HttpClient的POST方式[java]
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public class Activity05 extends Activity {
private TextView mTextView ;
private Button mButton;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
mTextView = (TextView)findViewById(R.id.TextView01);
mButton = (Button)findViewById(R.id.Button01);
mButton.setOnClickListener(new httpListener());
}
//设置按钮监听器
class httpListener implements OnClickListener{
public void onClick(View arg0) {
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp";
//创建HttpPost连接对象
HttpPost httpRequest = new HttpPost(httpUrl);
//使用NameValuePair来保存要传递的Post参数
List<NameValuePair> params = new ArrayList<NameValuePair>();
//添加要传递的参数
params.add(new BasicNameValuePair("par","HttpClient_android_Post"));
try{
//设置字符集
HttpEntity httpentity = new UrlEncodedFormEntity(params,"gb2312");
//请求httpRequest
httpRequest.setEntity(httpentity);
//取的默认的HttpClient
HttpClient httpclient = new DefaultHttpClient();
//取的HttpResponse
HttpResponse httpResponse = httpclient.execute(httpRequest);
//HttpStatus.SC_OK表示连接成功
if(httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
//取的返回的字符串
String strResult = EntityUtils.toString(httpResponse.getEntity());//这个返回值可能会在行尾出现小方格
//在TextView要显示的文字过滤掉回车符（"\r"）就可以正常显示了。
String strsResult = strResult.replace("\r", "");
mTextView.setText(strsResult);
}else{
mTextView.setText("请求错误");
}
}catch(ClientProtocolException e){
mTextView.setText(e.getMessage().toString());
}catch(IOException e){
mTextView.setText(e.getMessage().toString());
}catch(Exception e){
mTextView.setText(e.getMessage().toString());
}
}
}
}
public class Activity05 extends Activity {
private TextView mTextView ;
private Button mButton;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.http);
mTextView = (TextView)findViewById(R.id.TextView01);
mButton = (Button)findViewById(R.id.Button01);
mButton.setOnClickListener(new httpListener());
}
//设置按钮监听器
class httpListener implements OnClickListener{
public void onClick(View arg0) {
String httpUrl = "http://192.168.0.101:8080/Test/test.jsp";
//创建HttpPost连接对象
HttpPost httpRequest = new HttpPost(httpUrl);
//使用NameValuePair来保存要传递的Post参数
List<NameValuePair> params = new ArrayList<NameValuePair>();
//添加要传递的参数
params.add(new BasicNameValuePair("par","HttpClient_android_Post"));
try{
//设置字符集
HttpEntity httpentity = new UrlEncodedFormEntity(params,"gb2312");
//请求httpRequest
httpRequest.setEntity(httpentity);
//取的默认的HttpClient
HttpClient httpclient = new DefaultHttpClient();
//取的HttpResponse
HttpResponse httpResponse = httpclient.execute(httpRequest);
//HttpStatus.SC_OK表示连接成功
if(httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
//取的返回的字符串
String strResult = EntityUtils.toString(httpResponse.getEntity());//这个返回值可能会在行尾出现小方格
//在TextView要显示的文字过滤掉回车符（"\r"）就可以正常显示了。
String strsResult = strResult.replace("\r", "");
mTextView.setText(strsResult);
}else{
mTextView.setText("请求错误");
}
}catch(ClientProtocolException e){
mTextView.setText(e.getMessage().toString());
}catch(IOException e){
mTextView.setText(e.getMessage().toString());
}catch(Exception e){
mTextView.setText(e.getMessage().toString());
}
}
}
}
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