androidhttppost文件

⑴ android通過http post實現文件下載

可參照我的如下代碼

java">java.io.OutputStreamos=null;
java.io.InputStreamis=null;
try{
java.io.Filefile=newjava.io.File(str_local_file_path);
if(file.exists()&&file.length()>0){
}else{
file.createNewFile();

java.net.URLurl=newjava.net.URL(str_url);
java.net.HttpURLConnectionconn=(java.net.HttpURLConnection)url.openConnection();
os=newjava.io.FileOutputStream(file);
is=conn.getInputStream();
byte[]buffer=newbyte[1024*4];
intn_rx=0;
while((n_rx=is.read(buffer))>0){
os.write(buffer,0,n_rx);
}
}
returntrue;
}catch(MalformedURLExceptione){
}catch(IOExceptione){
}finally{
os.flush();
os.close();
is.close();
}
returnfalse;

⑵ android post網路數據的請求

public static String HttpPostMethod(String get_url,
List<NameValuePair> params) {
String result = "";
HttpParams basicHttpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(basicHttpParams, 15 * 1000);
HttpConnectionParams.setSoTimeout(basicHttpParams, 15 * 1000);
HttpClient htc = new DefaultHttpClient(basicHttpParams);
HttpResponse httpResponse = null;
try {
HttpPost httpPost = new HttpPost(get_url);
// response = htc.execute(request);
// 設置httpPost請求參數
// 創建參數隊列
httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded");//json
httpPost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
// httpResponse = new DefaultHttpClient().execute(httpPost);
httpResponse = htc.execute(httpPost);
// System.out.println(httpResponse.getStatusLine().getStatusCode());
Log.d("zh1", get_url+" " + httpResponse.getStatusLine().getStatusCode());
if (httpResponse.getStatusLine().getStatusCode() == 200) {
// 第三步，使用getEntity方法活得返回結果
result = EntityUtils.toString(httpResponse.getEntity(), HTTP.UTF_8);
if(result==null||result.equals("")){
return null;
}
}else{
return null;
}
} catch (ClientProtocolException e) {
e.printStackTrace();
result = null;
} catch (IOException e) {
e.printStackTrace();
result = null;
}
return result;
}

⑶ Android Studio用httpPost向伺服器傳json數據，StringEntity不存在，求高手幫忙

你最後具體怎麼解決?

⑷ android 怎麼發送post請求並接收二進制數據

可使用android自帶的httpclient框架實現向伺服器發起get或post請求，以下為完整的示例代碼：
1. GET 方式傳遞參數
//先將參數放入List，再對參數進行URL編碼
List<BasicNameValuePair> params = new LinkedList<BasicNameValuePair>();
params.add(new BasicNameValuePair("param1", "數據")); //增加參數1
params.add(new BasicNameValuePair("param2", "value2"));//增加參數2
String param = URLEncodedUtils.format(params, "UTF-8");//對參數編碼
String baseUrl = "伺服器介面完整URL";
HttpGet getMethod = new HttpGet(baseUrl + "?" + param);//將URL與參數拼接
HttpClient httpClient = new DefaultHttpClient();
try {
HttpResponse response = httpClient.execute(getMethod); //發起GET請求
Log.i(TAG, "resCode = " + response.getStatusLine().getStatusCode()); //獲取響應碼
Log.i(TAG, "result = " + EntityUtils.toString(response.getEntity(), "utf-8"));//獲取伺服器響應內容
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

2. POST方式 方式傳遞參數
//和GET方式一樣，先將參數放入List
params = new LinkedList<BasicNameValuePair>();
params.add(new BasicNameValuePair("param1", "Post方法"));//增加參數1
params.add(new BasicNameValuePair("param2", "第二個參數"));//增加參數2
try {
HttpPost postMethod = new HttpPost(baseUrl);//創建一個post請求
postMethod.setEntity(new UrlEncodedFormEntity(params, "utf-8")); //將參數填入POST Entity中
HttpResponse response = httpClient.execute(postMethod); //執行POST方法
Log.i(TAG, "resCode = " + response.getStatusLine().getStatusCode()); //獲取響應碼
Log.i(TAG, "result = " + EntityUtils.toString(response.getEntity(), "utf-8")); //獲取響應內容
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

⑸ 安卓開發 http中get和post的區別

get就是要傳遞的參數在url里，
比如http://xxx.com?username=bcoder
post就是參數放在數據包里，用戶不能直接看到，相對安全些