android网络连接

android网络连接总结 文章分类:移动开发

一：HttpURLConnection Java代码

URL sourceUrl; String fileName =\"\"; try {

sourceUrl = new URL(\"网址\"); fileName = sourceUrl.getFile();

fileName = fileName.substring(fileName.lastIndexOf('/') + 1); fileName = \"/sdcard/\"+(new Date()).getTime()+fileName; /*创建临时文件 File myTempFile = File.createTempFile(\"temfile\ \".\"+\"mp3\");//文件扩展名 记录临时文件名

currentTempFilePath = myTempFile.getAbsolutePath(); */

FileOutputStream fos = new FileOutputStream(fileName); int read = 0;

byte[] buffer = new byte[512];

HttpURLConnection conn = (HttpURLConnection) sourceUrl.openConnection(); conn.setDoInput(true); conn.connect();

int length = conn.getContentLength();

InputStream is = conn.getInputStream(); do{

read = is.read(buffer); if(read > 0){

fos.write(buffer, 0, read); }

}while(read != -1);

} catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); return;

} catch (IOException e) {

// TODO Auto-generated catch block e.printStackTrace();

return; }

if(fileName !=\"\"){

File file = new File(fileName);

if (file.exists()){ //根据filename，操作这个文件 } }

URL sourceUrl; String fileName =\"\"; try { sourceUrl = new URL(\"网址\"); fileName = sourceUrl.getFile(); fileName = fileName.substring(fileName.lastIndexOf('/') + 1); fileName = \"/sdcard/\"+(new Date()).getTime()+fileName; /*创建临时文件 File myTempFile = File.createTempFile(\"temfile\ \".\"+\"mp3\");//文件扩展名 记录临时文件名

currentTempFilePath = myTempFile.getAbsolutePath(); */ FileOutputStream fos = new FileOutputStream(fileName); int read = 0; byte[] buffer = new byte[512]; HttpURLConnection conn = (HttpURLConnection) sourceUrl.openConnection(); conn.setDoInput(true); conn.connect(); int length = conn.getContentLength(); InputStream is = conn.getInputStream(); do{ read = is.read(buffer); if(read > 0){ fos.write(buffer, 0, read); } }while(read != -1); } catch (MalformedURLException e) { // TODO Auto-generated catch block

e.printStackTrace(); return; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return; } if(fileName !=\"\"){ File file = new File(fileName); if (file.exists()){ //根据filename，操作这个文件 } }

Java代码

URL imageUrl = null; Bitmap bitmap = null; try {

/* new URL对象将网址传入 */ imageUrl = new URL(uriPic); }

catch (MalformedURLException e) {

e.printStackTrace(); } try {

/* 取得连接 */

HttpURLConnection conn = (HttpURLConnection) imageUrl .openConnection(); conn.connect();

/* 取得返回的InputStream */

InputStream is = conn.getInputStream();

mTextView1.setText(conn.getResponseCode()+\"=\"+conn.getResponseMessage()); /* 将InputStream变成Bitmap */

bitmap = BitmapFactory.decodeStream(is); /* 关闭InputStream */ is.close(); }

catch (IOException e) {

e.printStackTrace(); }

URL imageUrl = null; Bitmap bitmap = null; try {

/* new URL对象将网址传入 */ imageUrl = new URL(uriPic); }

catch (MalformedURLException e) {

e.printStackTrace(); } try {

/* 取得连接 */

HttpURLConnection conn = (HttpURLConnection) imageUrl .openConnection(); conn.connect();

/* 取得返回的InputStream */

InputStream is = conn.getInputStream();

mTextView1.setText(conn.getResponseCode()+\"=\"+conn.getResponseMessage()); /* 将InputStream变成Bitmap */

bitmap = BitmapFactory.decodeStream(is); /* 关闭InputStream */ is.close(); }

catch (IOException e) {

e.printStackTrace(); }

处理文字数据 Java代码

/* 将InputStream转成Reader */

BufferedReader in = new BufferedReader(new InputStreamReader( conn.getInputStream())); String inputLine; /* 图文件路径 */ String uriPic = \"\"; /* 一行一行读取 */

while ((inputLine = in.readLine()) != null) {

uriPic += inputLine; }

/* 将InputStream转成Reader */

BufferedReader in = new BufferedReader(new InputStreamReader( conn.getInputStream())); String inputLine; /* 图文件路径 */ String uriPic = \"\"; /* 一行一行读取 */

while ((inputLine = in.readLine()) != null) {

uriPic += inputLine; }

URLConnection 获取图片 Java代码

URL aryURI = new URL(myImageURL[position]);

URLConnection conn = aryURI.openConnection(); conn.connect();

InputStream is = conn.getInputStream();

Bitmap bm = BitmapFactory.decodeStream(is);

is.close();

imageView.setImageBitmap(bm);

URL aryURI = new URL(myImageURL[position]);

URLConnection conn = aryURI.openConnection(); conn.connect();

InputStream is = conn.getInputStream();

Bitmap bm = BitmapFactory.decodeStream(is);

is.close();

imageView.setImageBitmap(bm);

注:URL可以直接InputStream is = URL.openStream();

XML 的应用 Java代码

URL url = new URL(ConstData.queryString+cityParamString);

SAXParserFactory spf = SAXParserFactory.newInstance(); SAXParser sp = spf.newSAXParser();

XMLReader xr = sp.getXMLReader();

myHandler gwh = new myHandler(); xr.setContentHandler(gwh);

InputStreamReader isr InputStreamReader(url.openStream(),\"GBK\");

InputSource is=new InputSource(isr);

xr.parse(is);

URL url = new URL(ConstData.queryString+cityParamString); SAXParserFactory spf = SAXParserFactory.newInstance(); SAXParser sp = spf.newSAXParser();

XMLReader xr = sp.getXMLReader();

myHandler gwh = new myHandler(); xr.setContentHandler(gwh);

InputStreamReader isr InputStreamReader(url.openStream(),\"GBK\");

InputSource is=new InputSource(isr);

xr.parse(is);

=new

=new

向服务器上传文件 Java代码

private void uploadFile() {

String end = \"\\r\\n\";

String twoHyphens = \"--\"; String boundary = \"*****\"; try {

URL url =new URL(actionUrl);

HttpURLConnection con=(HttpURLConnection)url.openConnection(); /* 允许Input、Output，不使用Cache */ con.setDoInput(true); con.setDoOutput(true); con.setUseCaches(false);

/* 设置传送的method=POST */ con.setRequestMethod(\"POST\"); /* setRequestProperty */

con.setRequestProperty(\"Connection\ con.setRequestProperty(\"Charset\ con.setRequestProperty(\"Content-Type\

\"multipart/form-data;boundary=\"+boundary); /* 设置DataOutputStream */ DataOutputStream ds =

new DataOutputStream(con.getOutputStream()); ds.writeBytes(twoHyphens + boundary + end); ds.writeBytes(\"Content-Disposition: form-data; \" + \"name=\\\"file1\\\";filename=\\\"\" + newName +\"\\\"\" + end); ds.writeBytes(end);

/* 取得文件的FileInputStream */

FileInputStream fStream = new FileInputStream(uploadFile); /* 设置每次写入1024bytes */ int bufferSize = 1024;

byte[] buffer = new byte[bufferSize];

int length = -1;

/* 从文件读取数据至缓冲区 */

while((length = fStream.read(buffer)) != -1) {

/* 将资料写入DataOutputStream中 */ ds.write(buffer, 0, length);

}

ds.writeBytes(end);

ds.writeBytes(twoHyphens + boundary + twoHyphens + end);

/* close streams */ fStream.close(); ds.flush();

/* 取得Response内容 */

InputStream is = con.getInputStream(); int ch;

StringBuffer b =new StringBuffer(); while( ( ch = is.read() ) != -1 ) {

b.append( (char)ch ); }

/* 将Response显示于Dialog */ showDialog(b.toString().trim()); /* 关闭DataOutputStream */ ds.close(); }

catch(Exception e) {

showDialog(\"\"+e); } }

private void uploadFile() {

String end = \"\\r\\n\";

String twoHyphens = \"--\"; String boundary = \"*****\"; try {

URL url =new URL(actionUrl);

HttpURLConnection con=(HttpURLConnection)url.openConnection(); /* 允许Input、Output，不使用Cache */ con.setDoInput(true); con.setDoOutput(true); con.setUseCaches(false);

/* 设置传送的method=POST */ con.setRequestMethod(\"POST\"); /* setRequestProperty */

con.setRequestProperty(\"Connection\ con.setRequestProperty(\"Charset\ con.setRequestProperty(\"Content-Type\

\"multipart/form-data;boundary=\"+boundary); /* 设置DataOutputStream */ DataOutputStream ds =

new DataOutputStream(con.getOutputStream()); ds.writeBytes(twoHyphens + boundary + end); ds.writeBytes(\"Content-Disposition: form-data; \" + \"name=\\\"file1\\\";filename=\\\"\" + newName +\"\\\"\" + end); ds.writeBytes(end);

/* 取得文件的FileInputStream */

FileInputStream fStream = new FileInputStream(uploadFile); /* 设置每次写入1024bytes */ int bufferSize = 1024;

byte[] buffer = new byte[bufferSize];

int length = -1;

/* 从文件读取数据至缓冲区 */

while((length = fStream.read(buffer)) != -1) {

/* 将资料写入DataOutputStream中 */ ds.write(buffer, 0, length); }

ds.writeBytes(end);

ds.writeBytes(twoHyphens + boundary + twoHyphens + end);

/* close streams */ fStream.close(); ds.flush();

/* 取得Response内容 */

InputStream is = con.getInputStream(); int ch;

StringBuffer b =new StringBuffer(); while( ( ch = is.read() ) != -1 ) {

b.append( (char)ch ); }

/* 将Response显示于Dialog */ showDialog(b.toString().trim()); /* 关闭DataOutputStream */

ds.close(); }

catch(Exception e) {

showDialog(\"\"+e); } }

DefaultHttpClient 用户登录验证 Java代码

/* 账号：david */ /* 密码：1234 */

String uriAPI = \"http://www.dubblogs.cc:8751/Android/Test/API/TestLogin/index.php\"; String strRet = \"\"; try {

DefaultHttpClient httpclient = new DefaultHttpClient(); HttpResponse response;

HttpPost httpost = new HttpPost(uriAPI);

List nvps = new ArrayList (); nvps.add(new BasicNameValuePair(\"uid\ nvps.add(new BasicNameValuePair(\"upw\

httpost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));

response = httpclient.execute(httpost); HttpEntity entity = response.getEntity(); //entity = response.getEntity();

Log.d(TAG, \"HTTP POST getStatusLine: \" + response.getStatusLine());

/* HTML POST response BODY */ strRet = EntityUtils.toString(entity); Log.i(TAG, strRet);

strRet = strRet.trim().toLowerCase();

List cookies = httpclient.getCookieStore().getCookies(); if (entity != null) {

entity.consumeContent(); }

Log.d(TAG, \"HTTP POST Initialize of cookies.\"); cookies = httpclient.getCookieStore().getCookies(); if (cookies.isEmpty()) {

Log.d(TAG, \"HTTP POST Cookie not found.\"); Log.i(TAG, entity.toString()); } else {

for (int i = 0; i < cookies.size(); i++) {

Log.d(TAG, \"HTTP POST Found Cookie: \" + cookies.get(i).toString()); } }

if(strRet.equals(\"y\")) {

Log.i(\"TEST\ return true; } else {

Log.i(\"TEST\ return false; } }

catch(Exception e) {

e.printStackTrace(); return false; }