Java tutorial
/** * Copyright (C) 2011 Adriano Monteiro Marques * * Author: Zubair Nabi <zn.zubairnabi@gmail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ package org.umit.icm.mobile.utils; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.InputStream; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.OutputStream; import java.util.List; import org.umit.icm.mobile.connectivity.Service; import org.umit.icm.mobile.connectivity.Website; import org.umit.icm.mobile.process.Constants; import org.umit.icm.mobile.proto.MessageProtos.AgentData; import org.umit.icm.mobile.proto.MessageProtos.Event; import org.umit.icm.mobile.proto.MessageProtos.GetEventsResponse; import org.umit.icm.mobile.proto.MessageProtos.GetPeerListResponse; import org.umit.icm.mobile.proto.MessageProtos.GetSuperPeerListResponse; import org.umit.icm.mobile.proto.MessageProtos.NewTestsResponse; import org.umit.icm.mobile.proto.MessageProtos.ResponseHeader; import org.umit.icm.mobile.proto.MessageProtos.ServiceReport; import org.umit.icm.mobile.proto.MessageProtos.Test; import org.umit.icm.mobile.proto.MessageProtos.WebsiteReport; import twitter4j.auth.AccessToken; import android.os.Environment; /** * Provides methods for reading and writing different objects to the SDCard * storage. */ public class SDCardReadWrite { private static File sdCard; /** * Writes a {@link String} to the specified filename in directory. * * @param fileName An object of the type {@link String} * @param data An object of the type {@link String} * @param dir An object of the type {@link String} * @see File * @see FileWriter * @see Environment */ public static void writeString(String fileName, String dir, String data) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, fileName); if (!file.exists()) { file.createNewFile(); } FileWriter fileWriter = new FileWriter(file, false); try { fileWriter.write(data); } catch (Exception e) { throw new RuntimeException("SDCardWrite exception", e); } finally { fileWriter.close(); } } /** * Appends a {@link String} to the specified filename in directory. * * @param fileName An object of the type {@link String} * @param data An object of the type {@link String} * @param dir An object of the type {@link String} * @see File * @see FileWriter * @see Environment */ public static void writeStringAppend(String fileName, String dir, String data) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, fileName); if (!file.exists()) { file.createNewFile(); } FileWriter fileWriter = new FileWriter(file, true); try { fileWriter.write(data); } catch (Exception e) { throw new RuntimeException("SDCardWrite exception", e); } finally { fileWriter.close(); } } /** * Returns a {@link String} object of the file content from the specified * filename in directory. * * @param fileName An object of the type {@link String} * @return {@link String} * @param dir An object of the type {@link String} * @see File * @see FileReader * @see Environment */ public static String readString(String fileName, String dir) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, fileName); FileReader fileReader = new FileReader(file); BufferedReader bufferedReader = new BufferedReader(fileReader); try { return bufferedReader.readLine(); } catch (Exception e) { throw new RuntimeException("SDCardRead exception", e); } finally { fileReader.close(); } } /** * Checks if a certain file in a specified directory exists or not. * * @param fileName An object of the type {@link String} * @param dir An object of the type {@link String} * @return boolean @see File * @see FileWriter * @see Environment */ public static boolean fileExists(String fileName, String dir) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, fileName); if (file.exists()) { return true; } return false; } /** * Checks if a certain file in a specified directory is empty or not. * * @param fileName An object of the type {@link String} * @param dir An object of the type {@link String} * @return boolean @see File * @see FileWriter * @see Environment */ public static boolean fileNotEmpty(String fileName, String dir) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, fileName); if (!file.exists()) { return false; } FileReader fileReader = new FileReader(file); BufferedReader bufferedReader = new BufferedReader(fileReader); if (bufferedReader.readLine() == null) { return false; } return true; } /** * Writes a {@link Website} to the default filename in directory. * * @param data An object of the type {@link Website} * @param dir An object of the type {@link String} * @see File * @see FileWriter * @see Environment */ public static void writeWebsite(String dir, Website data) throws IOException, RuntimeException { ObjectOutputStream objOutStream = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, data.getUrl() + Constants.WEBSITE_FILE); if (!file.exists()) { file.createNewFile(); } try { objOutStream = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(file))); objOutStream.writeObject(data.getUrl()); objOutStream.writeObject(data.getCheck()); objOutStream.writeObject(data.getStatus()); objOutStream.writeObject(data.getTestID()); objOutStream.writeObject(Long.toString(data.getExecuteAtTimeUTC())); } catch (Exception e) { throw new RuntimeException("writeWebsite exception", e); } finally { objOutStream.close(); } } /** * Returns a {@link Website} object of the file content from the specified * filename in directory. * * @return {@link String} * @param dir An object of the type {@link String} * @param url An object of the type {@link String} * @see File * @see FileReader * @see Environment */ public static Website readWebsite(String dir, String url) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, url + Constants.WEBSITE_FILE); Website website = new Website(); InputStream inputStream = new FileInputStream(file.toString()); ObjectInputStream objInputStream = new ObjectInputStream(new BufferedInputStream(inputStream)); try { website.setUrl((String) objInputStream.readObject()); website.setCheck((String) objInputStream.readObject()); website.setStatus((String) objInputStream.readObject()); website.setTestID((String) objInputStream.readObject()); website.setExecuteAtTimeUTC(Long.parseLong((String) objInputStream.readObject())); return website; } catch (Exception e) { throw new RuntimeException("readWebsite exception", e); } finally { objInputStream.close(); } } /** * Checks if the SDCard is present or not. * * @return boolean * @see Environment */ public static boolean checkSDCard() { String storageState = android.os.Environment.getExternalStorageState(); String mediaMounted = android.os.Environment.MEDIA_MOUNTED; if (storageState.equals(mediaMounted)) return true; return false; } /** * Writes a {@link WebsiteReport} to the default filename in directory. * * @param data An object of the type {@link WebsiteReport} * @param dir An object of the type {@link String} * @see File * @see FileWriter * @see FileOutputStream */ public static void writeWebsiteReport(String dir, WebsiteReport data) throws IOException, RuntimeException { OutputStream outputStream = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, data.getReport().getWebsiteURL().substring(11).replaceAll("/", "-") + Constants.WEBSITE_FILE); if (!file.exists()) { file.createNewFile(); } try { outputStream = new FileOutputStream(file); data.writeTo(outputStream); } catch (Exception e) { throw new RuntimeException("write website exception", e); } finally { outputStream.close(); } } /** * Returns a {@link WebsiteReport} object of the file content from the specified * filename in directory. * * @return {@link WebsiteReport} * @param dir An object of the type {@link String} * @param url An object of the type {@link String} * @see File * @see FileReader * @see Environment */ public static WebsiteReport readWebsiteReport(String dir, String url) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, url.substring(11).replaceAll("/", "-") + Constants.WEBSITE_FILE); InputStream inputStream = new FileInputStream(file.toString()); try { WebsiteReport websiteReport = WebsiteReport.parseFrom(inputStream); return websiteReport; } catch (Exception e) { throw new RuntimeException("read website exception", e); } finally { inputStream.close(); } } /** * Writes a {@link List} of {@link Website} to the default filename in directory. * * @param data An object of the type {@link List} of {@link Website} * @param dir An object of the type {@link String} * @see File * @see FileWriter * @see Environment */ public static void writeWebsitesList(String dir, List<Website> data) throws IOException, RuntimeException { ObjectOutputStream objOutStream = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, Constants.WEBSITES_LIST_FILE); if (!file.exists()) { file.createNewFile(); } try { objOutStream = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(file))); objOutStream.writeObject(data); } catch (Exception e) { throw new RuntimeException("write websites list exception", e); } finally { objOutStream.close(); } } /** * Returns a {@link List} of {@link Website} object from the specified * filename in directory. * * @return {@link List} of {@link Website} * @param dir An object of the type {@link String} * @see File * @see FileReader * @see Environment */ @SuppressWarnings("unchecked") public static List<Website> readWebsitesList(String dir) throws IOException, RuntimeException { List<Website> websites = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, Constants.WEBSITES_LIST_FILE); InputStream inputStream = new FileInputStream(file.toString()); ObjectInputStream objInputStream = new ObjectInputStream(new BufferedInputStream(inputStream)); try { websites = ((List<Website>) objInputStream.readObject()); return websites; } catch (Exception e) { throw new RuntimeException("read website exception", e); } finally { inputStream.close(); } } /** * Writes a {@link Service} object to the default * filename in directory. * * @param dir An object of the type {@link String} * @param data An object of the type {@link String} * @see File * @see FileWriter * @see Environment */ public static void writeService(String dir, Service data) throws IOException, RuntimeException { ObjectOutputStream objOutStream = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, data.getName() + Constants.SERVICE_FILE); if (!file.exists()) { file.createNewFile(); } try { objOutStream = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(file))); objOutStream.writeObject(data.getCheck()); objOutStream.writeObject(data.getName()); objOutStream.writeObject(data.getIp()); objOutStream.writeObject(data.getPort()); objOutStream.writeObject(data.getStatus()); objOutStream.writeObject(data.getTestID()); objOutStream.writeObject(Long.toString(data.getExecuteAtTimeUTC())); } catch (Exception e) { throw new RuntimeException("writeService exception", e); } finally { objOutStream.close(); } } /** * Returns a {@link Service} object of the file content from the specified * filename in directory. * * @return {@link Service} * @param dir An object of the type {@link String} * @param name An object of the type {@link String} * @see File * @see FileReader * @see Environment */ public static Service readService(String dir, String name) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, name + Constants.SERVICE_FILE); Service service = new Service(); InputStream inputStream = new FileInputStream(file.toString()); ObjectInputStream objInputStream = new ObjectInputStream(new BufferedInputStream(inputStream)); try { service.setCheck((String) objInputStream.readObject()); service.setName((String) objInputStream.readObject()); service.setIp((String) objInputStream.readObject()); service.setPort((Integer) objInputStream.readObject()); service.setStatus((String) objInputStream.readObject()); service.setTestID((String) objInputStream.readObject()); service.setExecuteAtTimeUTC(Long.parseLong((String) objInputStream.readObject())); return service; } catch (Exception e) { throw new RuntimeException("readService exception", e); } finally { objInputStream.close(); } } /** * Writes a {@link List} of {@link Service} to the default filename in directory. * * @param data An object of the type {@link List} of {@link Service} * @param dir An object of the type {@link String} * @see File * @see FileWriter * @see Environment */ public static void writeServicesList(String dir, List<Service> data) throws IOException, RuntimeException { ObjectOutputStream objOutStream = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, Constants.SERVICES_LIST_FILE); if (!file.exists()) { file.createNewFile(); } try { objOutStream = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(file))); objOutStream.writeObject(data); } catch (Exception e) { throw new RuntimeException("write services list exception", e); } finally { objOutStream.close(); } } /** * Returns a {@link List} of {@link Service} object from the specified * filename in directory. * * @return {@link List} of {@link Service} * @param dir An object of the type {@link String} * @see File * @see FileReader * @see Environment */ @SuppressWarnings("unchecked") public static List<Service> readServicesList(String dir) throws IOException, RuntimeException { List<Service> services = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, Constants.SERVICES_LIST_FILE); InputStream inputStream = new FileInputStream(file.toString()); ObjectInputStream objInputStream = new ObjectInputStream(new BufferedInputStream(inputStream)); try { services = ((List<Service>) objInputStream.readObject()); return services; } catch (Exception e) { throw new RuntimeException("read services list exception", e); } finally { inputStream.close(); } } /** * Writes a {@link List} of {@link AgentData} to the default filename in directory. * * @param data An object of the type {@link List} of {@link AgentData} * @param dir An object of the type {@link String} * @see File * @see FileWriter * @see Environment */ public static void writePeersList(String dir, List<AgentData> data) throws IOException, RuntimeException { OutputStream outputStream = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, Constants.PEERS_FILE); if (!file.exists()) { file.createNewFile(); } ResponseHeader responseHeader = ResponseHeader.newBuilder().setCurrentTestVersionNo(21) .setCurrentVersionNo(21).build(); GetPeerListResponse getPeerListResponse = GetPeerListResponse.newBuilder().setHeader(responseHeader) .addAllKnownPeers(data).build(); try { outputStream = new FileOutputStream(file); getPeerListResponse.writeTo(outputStream); } catch (Exception e) { throw new RuntimeException("write peers list exception", e); } finally { outputStream.close(); } } /** * Returns a {@link List} of {@link AgentData} object from the specified * filename in directory. * * @return {@link List} of {@link AgentData} * @param dir An object of the type {@link String} * @see File * @see FileReader * @see Environment */ public static List<AgentData> readPeersList(String dir) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, Constants.PEERS_FILE); InputStream inputStream = new FileInputStream(file.toString()); try { GetPeerListResponse getPeerListResponse = GetPeerListResponse.parseFrom(inputStream); return getPeerListResponse.getKnownPeersList(); } catch (Exception e) { throw new RuntimeException("read peers list exception", e); } finally { inputStream.close(); } } /** * Writes a {@link List} of {@link AgentData} to the default filename in directory. * * @param data An object of the type {@link List} of {@link AgentData} * @param dir An object of the type {@link String} * @see File * @see FileWriter * @see Environment */ public static void writeSuperPeersList(String dir, List<AgentData> data) throws IOException, RuntimeException { OutputStream outputStream = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, Constants.SUPER_PEERS_FILE); if (!file.exists()) { file.createNewFile(); } ResponseHeader responseHeader = ResponseHeader.newBuilder().setCurrentTestVersionNo(21) .setCurrentVersionNo(21).build(); GetSuperPeerListResponse getSuperPeerListResponse = GetSuperPeerListResponse.newBuilder() .setHeader(responseHeader).addAllKnownSuperPeers(data).build(); try { outputStream = new FileOutputStream(file); getSuperPeerListResponse.writeTo(outputStream); } catch (Exception e) { throw new RuntimeException("write super peers list exception", e); } finally { outputStream.close(); } } /** * Returns a {@link List} of {@link AgentData} object from the specified * filename in directory. * * @return {@link List} of {@link AgentData} * @param dir An object of the type {@link String} * @see File * @see FileReader * @see Environment */ public static List<AgentData> readSuperPeersList(String dir) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, Constants.SUPER_PEERS_FILE); InputStream inputStream = new FileInputStream(file.toString()); try { GetSuperPeerListResponse getSuperPeerListResponse = GetSuperPeerListResponse.parseFrom(inputStream); return getSuperPeerListResponse.getKnownSuperPeersList(); } catch (Exception e) { throw new RuntimeException("read super peers list exception", e); } finally { inputStream.close(); } } /** * Writes a {@link List} of {@link Event} to the default filename in directory. * * @param data An object of the type {@link List} of {@link Event} * @param dir An object of the type {@link String} * @see File * @see ObjectOutputStream * @see Environment */ public static void writeEventsList(String dir, List<Event> data) throws IOException, RuntimeException { OutputStream outputStream = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, Constants.EVENTS_FILE); if (!file.exists()) { file.createNewFile(); } ResponseHeader responseHeader = ResponseHeader.newBuilder().setCurrentTestVersionNo(21) .setCurrentVersionNo(21).build(); GetEventsResponse getEventsResponse = GetEventsResponse.newBuilder().addAllEvents(data) .setHeader(responseHeader).build(); try { outputStream = new FileOutputStream(file); getEventsResponse.writeTo(outputStream); } catch (Exception e) { throw new RuntimeException("write events list exception", e); } finally { outputStream.close(); } } /** * Returns a {@link List} of {@link Event} object from the specified * filename in directory. * * @return {@link List} of {@link Event} * @param dir An object of the type {@link String} * @see File * @see ObjectInputStream * @see Environment */ public static List<Event> readEventsList(String dir) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, Constants.EVENTS_FILE); InputStream inputStream = new FileInputStream(file.toString()); try { GetEventsResponse getEventsResponse = GetEventsResponse.parseFrom(inputStream); return getEventsResponse.getEventsList(); } catch (Exception e) { throw new RuntimeException("read events list exception", e); } finally { inputStream.close(); } } /** * Writes a {@link List} of {@link Test} to the default filename in directory. * * @param data An object of the type {@link List} of {@link Test} * @param dir An object of the type {@link String} * @see File * @see ObjectOutputStream * @see Environment */ public static void writeTestsList(String dir, List<Test> data) throws IOException, RuntimeException { ObjectOutputStream objOutStream = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, Constants.TESTS_FILE); if (!file.exists()) { file.createNewFile(); } ResponseHeader responseHeader = ResponseHeader.newBuilder().setCurrentTestVersionNo(21) .setCurrentVersionNo(21).build(); NewTestsResponse newTestsResponse = NewTestsResponse.newBuilder().addAllTests(data).setTestVersionNo(10) .setHeader(responseHeader).build(); try { objOutStream = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(file))); newTestsResponse.writeTo(objOutStream); } catch (Exception e) { throw new RuntimeException("write tests list exception", e); } finally { objOutStream.close(); } } /** * Returns a {@link List} of {@link Test} object from the specified * filename in directory. * * @return {@link List} of {@link Test} * @param dir An object of the type {@link String} * @see File * @see ObjectInputStream * @see Environment */ public static List<Test> readTestsList(String dir) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, Constants.TESTS_FILE); InputStream inputStream = new FileInputStream(file.toString()); ObjectInputStream objInputStream = new ObjectInputStream(new BufferedInputStream(inputStream)); try { NewTestsResponse newTestsResponse = NewTestsResponse.parseFrom(objInputStream); return newTestsResponse.getTestsList(); } catch (Exception e) { throw new RuntimeException("read tests list exception", e); } finally { inputStream.close(); } } /** * Writes a {@link WebsiteReport} to the default filename in directory. * * @param data An object of the type {@link WebsiteReport} * @param dir An object of the type {@link String} * @see File * @see FileWriter * @see FileOutputStream */ public static void writeServiceReport(String dir, ServiceReport data) throws IOException, RuntimeException { OutputStream outputStream = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, data.getReport().getServiceName() + Constants.SERVICE_FILE); if (!file.exists()) { file.createNewFile(); } try { outputStream = new FileOutputStream(file); data.writeTo(outputStream); } catch (Exception e) { throw new RuntimeException("write service report exception", e); } finally { outputStream.close(); } } /** * Returns a {@link WebsiteReport} object of the file content from the specified * filename in directory. * * @return {@link WebsiteReport} * @param dir An object of the type {@link String} * @param url An object of the type {@link String} * @see File * @see FileReader * @see Environment */ public static ServiceReport readServiceReport(String dir, String url) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, url + Constants.SERVICE_FILE); InputStream inputStream = new FileInputStream(file.toString()); try { ServiceReport serviceReport = ServiceReport.parseFrom(inputStream); return serviceReport; } catch (Exception e) { throw new RuntimeException("read service report exception", e); } finally { inputStream.close(); } } /** * Writes a {@link AccessToken} object to the default * filename in directory. * * @param dir An object of the type {@link String} * @param data An object of the type {@link AccessToken} * @see File * @see FileWriter * @see Environment */ public static void writeAccessToken(String dir, AccessToken data) throws IOException, RuntimeException { ObjectOutputStream objOutStream = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, Constants.ACCESS_TOKEN_FILE); if (!file.exists()) { file.createNewFile(); } try { objOutStream = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(file))); objOutStream.writeObject(data.getToken()); objOutStream.writeObject(data.getTokenSecret()); } catch (Exception e) { throw new RuntimeException("writeAccessToken exception", e); } finally { objOutStream.close(); } } /** * Returns a {@link AccessToken} object of the file content from the specified * filename in directory. * * @return {@link AccessToken} * @param dir An object of the type {@link String} * @see File * @see FileReader * @see Environment */ public static AccessToken readAccessToken(String dir) throws IOException, RuntimeException { sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, Constants.ACCESS_TOKEN_FILE); InputStream inputStream = new FileInputStream(file.toString()); ObjectInputStream objInputStream = new ObjectInputStream(new BufferedInputStream(inputStream)); try { String token = ((String) objInputStream.readObject()); String tokenSecret = ((String) objInputStream.readObject()); return new AccessToken(token, tokenSecret); } catch (Exception e) { throw new RuntimeException("readToken exception", e); } finally { objInputStream.close(); } } /** * Writes a {@link List} of {@link String} to the given filename in directory. * * @param data An object of the type {@link List} of {@link String} * @param dir An object of the type {@link String} * @see File * @see ObjectOutputStream * @see Environment */ public static void writeStringList(String dir, String filename, List<String> data) throws IOException, RuntimeException { ObjectOutputStream objOutStream = null; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); keyDir.mkdirs(); File file = new File(keyDir, filename); if (!file.exists()) { file.createNewFile(); } try { objOutStream = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(file))); objOutStream.writeObject(data); } catch (Exception e) { throw new RuntimeException("write string list exception", e); } finally { objOutStream.close(); } } /** * Returns a {@link List} of {@link String} object from the specified * filename in directory. * * @return {@link List} of {@link String} * @param dir An object of the type {@link String} * @see File * @see ObjectInputStream * @see Environment */ @SuppressWarnings("unchecked") public static List<String> readStringList(String dir, String filename) throws IOException, RuntimeException { List<String> list; sdCard = Environment.getExternalStorageDirectory(); File keyDir = new File(sdCard.getAbsolutePath() + dir); File file = new File(keyDir, filename); InputStream inputStream = new FileInputStream(file.toString()); ObjectInputStream objInputStream = new ObjectInputStream(new BufferedInputStream(inputStream)); try { list = ((List<String>) objInputStream.readObject()); return list; } catch (Exception e) { throw new RuntimeException("read String list exception", e); } finally { inputStream.close(); } } }