Java android api làm việc với API server

Diễn đàn Cổng thông tin , Chính phủ điện tử, VSP (VerySmart Portal), MVC Model View Controller, json, webapi Java android api làm việc với API server

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radiogaga Ta đây thủy tinh, có tài gọi mưa hô gió ... Sơn Tinh ta đây : có tài là đốn gốc cây, đánh hốc cây ... 44 bài	25-07-2019 09:17:38 package com.dhag.securestamp; import android.os.AsyncTask; import android.util.Log; import java.util.ArrayList; public class ApiMultipart extends AsyncTask { public ApiMultipart() {} private String file_name = "sample.jpg"; private byte [] fileContent; private ArrayList collections = new ArrayList(); private SomeEventListener listener; public void setFileData(String file_name, byte [] inputData) { this.file_name = file_name; this.fileContent = inputData; } public void addFormData(String name, String value) { NameValue nv = new NameValue(name, value); collections.add(nv); } public void setSomeEventListener (SomeEventListener listener) { this.listener = listener; } @Override protected String doInBackground(String... params) { String baseUrl = params [0] ; String data = ""; try { HttpClient client = new HttpClient(baseUrl); client.connectForMultipart(); for(int i =0; i < collections.size(); i++) { NameValue obj = (NameValue)collections.get(i); client.addFormPart(obj.getName(), obj.getValue()); } client.addFilePart("fileUp", file_name, fileContent); client.finishMultipart(); data = client.getResponse(); } catch(Exception ex) { ex.printStackTrace(); } return data; } @Override protected void onPostExecute(String data) { if (listener != null) listener.onCompleteEvent (); } } ============ package com.dhag.securestamp; import android.os.AsyncTask; import android.util.Log; import org.json.JSONException; import org.json.JSONObject; import java.io.BufferedInputStream; import java.io.BufferedWriter; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.net.HttpURLConnection; import java.net.URL; public class ApiPost extends AsyncTask { public String msg; private SomeEventListener listener; private JSONObject jsonObject = null; private String http_method = "POST"; public ApiPost() {} public void setJsonObj(JSONObject myObject){ jsonObject = myObject; } public void setMethod(String method) { http_method = method; } public void setSomeEventListener (SomeEventListener listener) { this.listener = listener; } @Override protected String doInBackground(String... urls) { // params comes from the execute() call: params [0] is the url. try { try { return HttpPost(urls [0] ); } catch (JSONException e) { e.printStackTrace(); return "Error!"; } } catch (IOException e) { return "Unable to retrieve web page. URL may be invalid."; } } private String HttpPost(String myUrl) throws IOException, JSONException { URL url = new URL(myUrl); // 1. create HttpURLConnection HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod(http_method); conn.setRequestProperty("Content-Type", "application/json; charset=utf-8"); // 2. build JSON object //JSONObject jsonObject = buidJsonObject(); // 3. add JSON content to POST request body if(jsonObject != null) setPostRequestContent(conn, jsonObject); // 4. make POST request to the given URL conn.connect(); // 5. get return json InputStream inStream = new BufferedInputStream(conn.getInputStream()); ByteArrayOutputStream into = new ByteArrayOutputStream(); byte [] buf = new byte [4096] ; for (int n; 0 < (n = inStream.read(buf));) { into.write(buf, 0, n); } into.close(); msg = new String(into.toByteArray(), "UTF-8"); // 6. return response message return conn.getResponseMessage() + ""; } private void setPostRequestContent(HttpURLConnection conn, JSONObject jsonObject) throws IOException { OutputStream os = conn.getOutputStream(); BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8")); writer.write(jsonObject.toString()); Log.i("ApiPost", jsonObject.toString()); writer.flush(); writer.close(); os.close(); } @Override protected void onPostExecute(String result) { if (listener != null) listener.onCompleteEvent (); } }

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