Java tutorial
/* * Copyright 2011 Alex Fu * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.gmail.at.faint545.tasks; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.util.ArrayList; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import android.app.ProgressDialog; import android.os.AsyncTask; import android.support.v4.app.Fragment; import com.gmail.at.faint545.SabnzbdConstants; import com.gmail.at.faint545.fragments.QueueFragment; public class QueueActionTask extends AsyncTask<String, Void, String> { private String url; private String api; private int request; private Fragment fragment; public final static int DELETE = QueueFragment.DELETE; public final static int PAUSE = QueueFragment.PAUSE; public final static int RESUME = QueueFragment.RESUME; public final static int SPEEDLIMIT = RESUME >> 1; public interface QueueActionTaskListener { public void onQueueDeleteFinished(String result); public void onQueuePauseFinished(String result); public void onQueueResumeFinished(String result); public void onSpeedLimitFinished(String result); } public QueueActionTask(Fragment fragment, String url, String api, int request) { this.fragment = fragment; this.request = request; this.url = url; this.api = api; } @Override protected String doInBackground(String... params) { HttpClient httpClient = new DefaultHttpClient(); HttpPost httpRequest = new HttpPost(url); ArrayList<NameValuePair> arguments = new ArrayList<NameValuePair>(); arguments.add(new BasicNameValuePair(SabnzbdConstants.APIKEY, api)); arguments.add(new BasicNameValuePair(SabnzbdConstants.OUTPUT, SabnzbdConstants.OUTPUT_JSON)); switch (request) { case DELETE: prepareForDelete(arguments, params); break; case PAUSE: prepareForPause(arguments, params); break; case RESUME: prepareForResume(arguments, params); break; case SPEEDLIMIT: prepareForSpeedLimit(arguments, params); break; } try { httpRequest.setEntity(new UrlEncodedFormEntity(arguments)); HttpResponse result = httpClient.execute(httpRequest); InputStream inStream = result.getEntity().getContent(); BufferedReader br = new BufferedReader(new InputStreamReader(inStream), 8); StringBuilder jsonStringBuilder = new StringBuilder(); String line; while ((line = br.readLine()) != null) { if (line.length() > 0) jsonStringBuilder.append(line); } br.close(); inStream.close(); return jsonStringBuilder.toString(); } catch (ClientProtocolException e) { return ClientProtocolException.class.getName(); } catch (IOException e) { return IOException.class.getName(); } } @Override protected void onPostExecute(String result) { QueueActionTaskListener listener = (QueueActionTaskListener) fragment; switch (request) { case DELETE: listener.onQueueDeleteFinished(result); break; case PAUSE: listener.onQueuePauseFinished(result); break; case RESUME: listener.onQueueResumeFinished(result); break; case SPEEDLIMIT: listener.onSpeedLimitFinished(result); break; } cleanup(); super.onPostExecute(result); } private void cleanup() { fragment = null; url = null; api = null; } private void prepareForDelete(ArrayList<NameValuePair> arguments, String... params) { String value = (params[0] == null) ? SabnzbdConstants.ALL : params[0]; arguments.add(new BasicNameValuePair(SabnzbdConstants.MODE, SabnzbdConstants.MODE_QUEUE)); arguments.add(new BasicNameValuePair(SabnzbdConstants.NAME, SabnzbdConstants.DELETE)); arguments.add(new BasicNameValuePair(SabnzbdConstants.VALUE, value)); } private void prepareForResume(ArrayList<NameValuePair> arguments, String... params) { if (params[0] == null) { // A global resume arguments.add(new BasicNameValuePair(SabnzbdConstants.MODE, SabnzbdConstants.MODE_RESUME)); } else { // Individual resume arguments.add(new BasicNameValuePair(SabnzbdConstants.MODE, SabnzbdConstants.MODE_QUEUE)); arguments.add(new BasicNameValuePair(SabnzbdConstants.NAME, SabnzbdConstants.MODE_RESUME)); arguments.add(new BasicNameValuePair(SabnzbdConstants.VALUE, params[0])); } } private void prepareForPause(ArrayList<NameValuePair> arguments, String... params) { if (params[0] == null) { // A global pause arguments.add(new BasicNameValuePair(SabnzbdConstants.MODE, SabnzbdConstants.MODE_PAUSE)); } else { // Individual pause arguments.add(new BasicNameValuePair(SabnzbdConstants.MODE, SabnzbdConstants.MODE_QUEUE)); arguments.add(new BasicNameValuePair(SabnzbdConstants.NAME, SabnzbdConstants.MODE_PAUSE)); arguments.add(new BasicNameValuePair(SabnzbdConstants.VALUE, params[0])); } } private void prepareForSpeedLimit(ArrayList<NameValuePair> arguments, String... params) { arguments.add(new BasicNameValuePair(SabnzbdConstants.MODE, SabnzbdConstants.MODE_CONFIG)); arguments.add(new BasicNameValuePair(SabnzbdConstants.NAME, SabnzbdConstants.SPEEDLIMIT)); arguments.add(new BasicNameValuePair(SabnzbdConstants.VALUE, params[0])); } }