Java tutorial
/** * This file is licensed under MIT * * The MIT License (MIT) * * Copyright (c) 2014 Jonas Gehring * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.jjoe64.graphview_demos.fragments; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.SharedPreferences; import android.graphics.Typeface; import android.hardware.usb.UsbManager; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.os.CountDownTimer; import android.os.Handler; import android.os.SystemClock; import android.preference.PreferenceManager; import android.support.v4.app.Fragment; import android.util.Log; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.CheckBox; import android.widget.EditText; import android.widget.ImageButton; import android.widget.LinearLayout; import android.widget.ProgressBar; import android.widget.ScrollView; import android.widget.TextView; import android.widget.Toast; import com.jjoe64.graphview.GraphView; import com.jjoe64.graphview.LegendRenderer; import com.jjoe64.graphview.series.DataPoint; import com.jjoe64.graphview.series.LineGraphSeries; import com.jjoe64.graphview_demos.MainActivity; import com.jjoe64.graphview_demos.R; import com.physicaloid.lib.Physicaloid; import com.physicaloid.lib.usb.driver.uart.UartConfig; import java.io.IOException; import java.util.Arrays; import java.util.Random; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * Created by jonas on 28.08.14. */ public class CollectData extends Fragment { static final int PREFERENCE_REV_NUM = 1; // debug settings private static final boolean SHOW_DEBUG = true; private static final boolean USE_WRITE_BUTTON_FOR_DEBUG = false; public static final boolean isICSorHigher = (Build.VERSION.SDK_INT > Build.VERSION_CODES.HONEYCOMB_MR2); // occurs USB packet loss if TEXT_MAX_SIZE is over 6000 private static final int TEXT_MAX_SIZE = 15000; private static final int MENU_ID_SETTING = 0; private static final int MENU_ID_CLEARTEXT = 1; private static final int MENU_ID_SENDTOEMAIL = 2; private static final int MENU_ID_OPENDEVICE = 3; private static final int MENU_ID_CLOSEDEVICE = 4; private static final int MENU_ID_WORDLIST = 5; private static final int REQUEST_PREFERENCE = 0; private static final int REQUEST_WORD_LIST_ACTIVITY = 1; // Defines of Display Settings private static final int DISP_CHAR = 0; private static final int DISP_DEC = 1; private static final int DISP_HEX = 2; // Linefeed Code Settings private static final int LINEFEED_CODE_CR = 0; private static final int LINEFEED_CODE_CRLF = 1; private static final int LINEFEED_CODE_LF = 2; // Load Bundle Key (for view switching) private static final String BUNDLEKEY_LOADTEXTVIEW = "bundlekey.LoadTextView"; Physicaloid mSerial = null; public static boolean collectData = false; private ScrollView mSvText; private TextView mTvSerial; private StringBuilder mText = new StringBuilder(); private boolean mStop = false; String TAG = "AndroidSerialTerminal"; Handler mHandler = new Handler(); private Button btWriteFile; private Button startCollect; private EditText etWrite; private ProgressBar mProgressBar; //File parameters private String[] names = { "Alice", "Bob", "Chris", "Dave", "Eliza", "Fred", "George", "Helen", "Ivan", "Jack", "Kelly", "Linda", "Meg" }; private int networkSize = 13; private int currDeviceID = 0; private int[] dataReceived = new int[networkSize]; // Default settings private int mTextFontSize = 12; private Typeface mTextTypeface = Typeface.MONOSPACE; private int mDisplayType = DISP_CHAR; private int mReadLinefeedCode = LINEFEED_CODE_LF; private int mWriteLinefeedCode = LINEFEED_CODE_LF; private int mBaudrate = 57600; private int mDataBits = UartConfig.DATA_BITS8; private int mParity = UartConfig.PARITY_NONE; private int mStopBits = UartConfig.STOP_BITS1; private int mFlowControl = UartConfig.FLOW_CONTROL_OFF; private String mEmailAddress = "@gmail.com"; private boolean mRunningMainLoop = false; private static final String ACTION_USB_PERMISSION = "jp.ksksue.app.terminal.USB_PERMISSION"; // Linefeed private final static String BR = System.getProperty("line.separator"); public CheckBox[] devicesOnline = new CheckBox[networkSize]; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_collect_data_3, container, false); mSvText = (ScrollView) rootView.findViewById(R.id.svText); mTvSerial = (TextView) rootView.findViewById(R.id.tvSerial); startCollect = (Button) rootView.findViewById(R.id.startCollect); startCollect.setEnabled(true); mProgressBar=(ProgressBar) rootView.findViewById(R.id.progressBar); mProgressBar.setMax(15); //btWriteFile = (Button) rootView.findViewById(R.id.btWriteFile); //btWriteFile.setEnabled(false); //etWrite = (EditText) rootView.findViewById(R.id.etWrite); //etWrite.setEnabled(false); //etWrite.setHint("CR : \\r, LF : \\n, bin : \\u0000"); LinearLayout checkboxList = (LinearLayout) rootView.findViewById(R.id.checkboxList); LinearLayout checkboxList2 = (LinearLayout) rootView.findViewById(R.id.checkboxList2); for (int i = 0; i < networkSize; i++) { devicesOnline[i] = new CheckBox(getActivity()); devicesOnline[i].setText(names[i]); devicesOnline[i].setId(i); devicesOnline[i].setHeight(75); devicesOnline[i].setTextSize(25); devicesOnline[i].setTextAppearance(getActivity(), android.R.style.TextAppearance_Medium); if (i <= 6) checkboxList.addView(devicesOnline[i]); else checkboxList2.addView(devicesOnline[i]); } if (SHOW_DEBUG) { Log.d(TAG, "New FTDriver"); } // get service mSerial = new Physicaloid(getActivity()); if (SHOW_DEBUG) { Log.d(TAG, "New instance : " + mSerial); } // listen for new devices IntentFilter filter = new IntentFilter(); filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED); filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED); getActivity().registerReceiver(mUsbReceiver, filter); if (SHOW_DEBUG) { Log.d(TAG, "FTDriver beginning"); } closeUsbSerial(); openUsbSerial(); Arrays.fill(dataReceived,1); // --------------------------------------------------------------------------------------- // Collect Button // --------------------------------------------------------------------------------------- startCollect.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //if (mSerial != null) { String toSend = "D"; for (int i = 0; i < networkSize; i++) { toSend = toSend.concat(Integer.toString(dataReceived[i])); } byte[] start_code = toSend.getBytes(); //mSerial.write(start_code, start_code.length); //startCollect.setEnabled(false); //collectData = true; Log.d(TAG, "Should be collecting data now"); //TEMP // new CountDownTimer(300000, 10000) { // int device_counter = 0; // public void onTick(long millisUntilFinished) { // if (device_counter < networkSize) { // Random rand = new Random(); // int n = rand.nextInt(20) + 0; // n = n * 1000; // SystemClock.sleep(n); // devicesOnline[device_counter].setChecked(true); // device_counter = device_counter + 1; // mProgressBar.setProgress(device_counter); // } // else{ // mProgressBar.setProgress(mProgressBar.getMax()); // } // } // // public void onFinish() { // device_counter = device_counter + 1; // mProgressBar.setProgress(mProgressBar.getMax()); // } // }.start(); } // --------------------------------------------------------------------------------------- // Write Button // --------------------------------------------------------------------------------------- /*btWriteFile.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (mTvSerial.getText().toString().length() != 0) { FileManager fm = new FileManager(); String filename = mTvSerial.getText().toString().substring(0, 1) + ".txt"; fm.writeToFile(filename, mTvSerial.getText().toString()); btWriteFile.setEnabled(false); } } });*/ return rootView; } private String changeEscapeSequence(String in) { String out = new String(); try { out = unescapeJava(in); } catch (IOException e) { return ""; } switch (mWriteLinefeedCode) { case LINEFEED_CODE_CR: out = out + "\r"; break; case LINEFEED_CODE_CRLF: out = out + "\r\n"; break; case LINEFEED_CODE_LF: out = out + "\n"; break; default: } return out; } // public void setWriteTextString(String str) { // etWrite.setText(str); // } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == REQUEST_WORD_LIST_ACTIVITY) { if (resultCode == getActivity().RESULT_OK) { try { String strWord = data.getStringExtra("word"); //etWrite.setText(strWord); // Set a cursor position last //etWrite.setSelection(etWrite.getText().length()); } catch (Exception e) { Toast.makeText(getActivity(), e.getMessage(), Toast.LENGTH_LONG).show(); } } } else if (requestCode == REQUEST_PREFERENCE) { SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(getActivity()); String res = pref.getString("display_list", Integer.toString(DISP_CHAR)); mDisplayType = Integer.valueOf(res); res = pref.getString("fontsize_list", Integer.toString(12)); mTextFontSize = Integer.valueOf(res); mTvSerial.setTextSize(mTextFontSize); res = pref.getString("typeface_list", Integer.toString(3)); switch (Integer.valueOf(res)) { case 0: mTextTypeface = Typeface.DEFAULT; break; case 1: mTextTypeface = Typeface.SANS_SERIF; break; case 2: mTextTypeface = Typeface.SERIF; break; case 3: mTextTypeface = Typeface.MONOSPACE; break; } mTvSerial.setTypeface(mTextTypeface); // etWrite.setTypeface(mTextTypeface); res = pref.getString("readlinefeedcode_list", Integer.toString(LINEFEED_CODE_CRLF)); mReadLinefeedCode = Integer.valueOf(res); res = pref.getString("writelinefeedcode_list", Integer.toString(LINEFEED_CODE_CRLF)); mWriteLinefeedCode = Integer.valueOf(res); res = pref.getString("email_edittext", "@gmail.com"); mEmailAddress = res; int intRes; res = pref.getString("baudrate_list", Integer.toString(57600)); intRes = Integer.valueOf(res); if (mBaudrate != intRes) { mBaudrate = intRes; mSerial.setBaudrate(mBaudrate); } res = pref.getString("databits_list", Integer.toString(UartConfig.DATA_BITS8)); intRes = Integer.valueOf(res); if (mDataBits != intRes) { mDataBits = Integer.valueOf(res); mSerial.setDataBits(mDataBits); } res = pref.getString("parity_list", Integer.toString(UartConfig.PARITY_NONE)); intRes = Integer.valueOf(res); if (mParity != intRes) { mParity = intRes; mSerial.setParity(mParity); } res = pref.getString("stopbits_list", Integer.toString(UartConfig.STOP_BITS1)); intRes = Integer.valueOf(res); if (mStopBits != intRes) { mStopBits = intRes; mSerial.setStopBits(mStopBits); } res = pref.getString("flowcontrol_list", Integer.toString(UartConfig.FLOW_CONTROL_OFF)); intRes = Integer.valueOf(res); if (mFlowControl != intRes) { mFlowControl = intRes; if (mFlowControl == UartConfig.FLOW_CONTROL_ON) { mSerial.setDtrRts(true, true); } else { mSerial.setDtrRts(false, false); } } /* res = pref.getString("break_list", Integer.toString(FTDriver.FTDI_SET_NOBREAK)); intRes = Integer.valueOf(res) << 14; if (mBreak != intRes) { mBreak = intRes; mSerial.setSerialPropertyBreak(mBreak, FTDriver.CH_A); mSerial.setSerialPropertyToChip(FTDriver.CH_A); } */ } } // --------------------------------------------------------------------------------------- // End of Menu button // --------------------------------------------------------------------------------------- /** * Saves values for view switching */ @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putString(BUNDLEKEY_LOADTEXTVIEW, mTvSerial.getText().toString()); } /** * Loads values for view switching */ // @Override // protected void onRestoreInstanceState(Bundle savedInstanceState) { // super.onRestoreInstanceState(savedInstanceState); // mTvSerial.setText(savedInstanceState.getString(BUNDLEKEY_LOADTEXTVIEW)); // } @Override public void onDestroy() { mSerial.close(); mStop = true; getActivity().unregisterReceiver(mUsbReceiver); super.onDestroy(); } private void mainloop() { mStop = false; mRunningMainLoop = true; startCollect.setEnabled(true); //btWriteFile.setEnabled(true); //etWrite.setEnabled(true); Toast.makeText(getActivity(), "connected", Toast.LENGTH_SHORT).show(); if (SHOW_DEBUG) { Log.d(TAG, "start mainloop"); } new Thread(mLoop).start(); } private Runnable mLoop=new Runnable(){@Override public void run(){int len;byte[]rbuf=new byte[4096]; for(;;){// this is the main loop for transferring // //////////////////////////////////////////////////////// // Read and Display to Terminal // //////////////////////////////////////////////////////// len=mSerial.read(rbuf);rbuf[len]=0; if(len>0){if(SHOW_DEBUG){Log.d(TAG,"Read Length : "+len);} switch(mDisplayType){case DISP_CHAR:setSerialDataToTextView(mDisplayType,rbuf,len,"","");break;case DISP_DEC:setSerialDataToTextView(mDisplayType,rbuf,len,"013","010");break;case DISP_HEX:setSerialDataToTextView(mDisplayType,rbuf,len,"0d","0a");break;} mHandler.post(new Runnable(){public void run(){if(mTvSerial.length()>TEXT_MAX_SIZE){StringBuilder sb=new StringBuilder();sb.append(mTvSerial.getText());sb.delete(0,TEXT_MAX_SIZE/2);mTvSerial.setText(sb);}mTvSerial.append(mText);if(mText.toString().length()>1){Log.d(TAG,"Passed this");Log.d(TAG,mText.toString());Pattern pattern=Pattern.compile(".*,.*,.*");Matcher matcher=pattern.matcher(mText.toString());if(matcher.find()){Log.d(TAG,"Should have found a device");String[]deviceInfo=matcher.group(0).toString().split(",");Log.d(TAG,deviceInfo[1]);currDeviceID=Integer.parseInt(deviceInfo[1]);int success=Integer.parseInt(deviceInfo[2].substring(0,1));dataReceived[currDeviceID]=success;Log.d(TAG,Integer.toString(success));if(success==0){Log.d(TAG,"Should be writing a file");FileManager fm=new FileManager();String filename=deviceInfo[1]+".txt";fm.writeToFile(filename,mTvSerial.getText().toString());mTvSerial.setText("");devicesOnline[Integer.parseInt(deviceInfo[1])].setChecked(true);}}}mText.setLength(0);mSvText.fullScroll(ScrollView.FOCUS_DOWN);}});} try{Thread.sleep(50);}catch(InterruptedException e){e.printStackTrace();} if(mStop){mRunningMainLoop=false;return;}}}}; private String IntToHex2(int Value) { char HEX2[] = { Character.forDigit((Value >> 4) & 0x0F, 16), Character.forDigit(Value & 0x0F, 16) }; String Hex2Str = new String(HEX2); return Hex2Str; } boolean lastDataIs0x0D = false; void setSerialDataToTextView(int disp, byte[] rbuf, int len, String sCr, String sLf) { int tmpbuf; for (int i = 0; i < len; ++i) { if (SHOW_DEBUG) { //Log.d(TAG, "Read Data[" + i + "] : " + rbuf[i]); } // "\r":CR(0x0D) "\n":LF(0x0A) if ((mReadLinefeedCode == LINEFEED_CODE_CR) && (rbuf[i] == 0x0D)) { mText.append(sCr); mText.append(BR); } else if ((mReadLinefeedCode == LINEFEED_CODE_LF) && (rbuf[i] == 0x0A)) { mText.append(sLf); mText.append(BR); } else if ((mReadLinefeedCode == LINEFEED_CODE_CRLF) && (rbuf[i] == 0x0D) && (rbuf[i + 1] == 0x0A)) { mText.append(sCr); if (disp != DISP_CHAR) { mText.append(" "); } mText.append(sLf); mText.append(BR); ++i; } else if ((mReadLinefeedCode == LINEFEED_CODE_CRLF) && (rbuf[i] == 0x0D)) { // case of rbuf[last] == 0x0D and rbuf[0] == 0x0A mText.append(sCr); lastDataIs0x0D = true; } else if (lastDataIs0x0D && (rbuf[0] == 0x0A)) { if (disp != DISP_CHAR) { mText.append(" "); } mText.append(sLf); mText.append(BR); lastDataIs0x0D = false; } else if (lastDataIs0x0D && (i != 0)) { // only disable flag lastDataIs0x0D = false; --i; } else { switch (disp) { case DISP_CHAR: mText.append((char) rbuf[i]); break; case DISP_DEC: tmpbuf = rbuf[i]; if (tmpbuf < 0) { tmpbuf += 256; } mText.append(String.format("%1$03d", tmpbuf)); mText.append(" "); break; case DISP_HEX: mText.append(IntToHex2((int) rbuf[i])); mText.append(" "); break; default: break; } } } } void loadDefaultSettingValues() { SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(getActivity()); String res = pref.getString("display_list", Integer.toString(DISP_CHAR)); mDisplayType = Integer.valueOf(res); res = pref.getString("fontsize_list", Integer.toString(12)); mTextFontSize = Integer.valueOf(res); res = pref.getString("typeface_list", Integer.toString(3)); switch (Integer.valueOf(res)) { case 0: mTextTypeface = Typeface.DEFAULT; break; case 1: mTextTypeface = Typeface.SANS_SERIF; break; case 2: mTextTypeface = Typeface.SERIF; break; case 3: mTextTypeface = Typeface.MONOSPACE; break; } mTvSerial.setTypeface(mTextTypeface); //etWrite.setTypeface(mTextTypeface); res = pref.getString("readlinefeedcode_list", Integer.toString(LINEFEED_CODE_CRLF)); mReadLinefeedCode = Integer.valueOf(res); res = pref.getString("writelinefeedcode_list", Integer.toString(LINEFEED_CODE_CRLF)); mWriteLinefeedCode = Integer.valueOf(res); res = pref.getString("email_edittext", "@gmail.com"); mEmailAddress = res; res = pref.getString("baudrate_list", Integer.toString(57600)); mBaudrate = Integer.valueOf(res); res = pref.getString("databits_list", Integer.toString(UartConfig.DATA_BITS8)); mDataBits = Integer.valueOf(res); res = pref.getString("parity_list", Integer.toString(UartConfig.PARITY_NONE)); mParity = Integer.valueOf(res); res = pref.getString("stopbits_list", Integer.toString(UartConfig.STOP_BITS1)); mStopBits = Integer.valueOf(res); res = pref.getString("flowcontrol_list", Integer.toString(UartConfig.FLOW_CONTROL_OFF)); mFlowControl = Integer.valueOf(res); } private void sendTextToEmail() { Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.parse("mailto:" + mEmailAddress)); intent.putExtra("subject", "Result of " + getString(R.string.app_name)); intent.putExtra("body", mTvSerial.getText().toString().trim()); startActivity(intent); } // Load default baud rate int loadDefaultBaudrate() { SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(getActivity()); String res = pref.getString("baudrate_list", Integer.toString(9600)); return Integer.valueOf(res); } private void openUsbSerial() { if (mSerial == null) { //Toast.makeText(getActivity(), "cannot open", Toast.LENGTH_SHORT).show(); return; } if (!mSerial.isOpened()) { if (SHOW_DEBUG) { Log.d(TAG, "onNewIntent begin"); } if (!mSerial.open()) { //Toast.makeText(getActivity(), "cannot open", Toast.LENGTH_SHORT).show(); return; } else { loadDefaultSettingValues(); boolean dtrOn = false; boolean rtsOn = false; if (mFlowControl == UartConfig.FLOW_CONTROL_ON) { dtrOn = true; rtsOn = true; } mSerial.setConfig(new UartConfig(mBaudrate, mDataBits, mStopBits, mParity, dtrOn, rtsOn)); if (SHOW_DEBUG) { Log.d(TAG, "setConfig : baud : " + mBaudrate + ", DataBits : " + mDataBits + ", StopBits : " + mStopBits + ", Parity : " + mParity + ", dtr : " + dtrOn + ", rts : " + rtsOn); } mTvSerial.setTextSize(mTextFontSize); Toast.makeText(getActivity(), "connected", Toast.LENGTH_SHORT).show(); } } if (!mRunningMainLoop) { mainloop(); } } private void closeUsbSerial() { detachedUi(); mStop = true; mSerial.close(); } protected void onNewIntent(Intent intent) { if (SHOW_DEBUG) { Log.d(TAG, "onNewIntent"); } openUsbSerial(); }; private void detachedUi() { //etWrite.setEnabled(false); //Toast.makeText(getActivity(), "disconnect", Toast.LENGTH_SHORT).show(); } // BroadcastReceiver when insert/remove the device USB plug into/from a USB // port BroadcastReceiver mUsbReceiver = new BroadcastReceiver() { public void onReceive(Context context,Intent intent){String action=intent.getAction(); if(UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(action)){if(SHOW_DEBUG){Log.d(TAG,"Device attached");}if(!mSerial.isOpened()){if(SHOW_DEBUG){Log.d(TAG,"Device attached begin");}openUsbSerial();}if(!mRunningMainLoop){if(SHOW_DEBUG){Log.d(TAG,"Device attached mainloop");}mainloop();}}else if(UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action)){if(SHOW_DEBUG){Log.d(TAG,"Device detached");}mStop=true;detachedUi(); //mSerial.usbDetached(intent); mSerial.close();}else if(ACTION_USB_PERMISSION.equals(action)){if(SHOW_DEBUG){Log.d(TAG,"Request permission");}synchronized(this){if(!mSerial.isOpened()){if(SHOW_DEBUG){Log.d(TAG,"Request permission begin");}openUsbSerial();}}if(!mRunningMainLoop){if(SHOW_DEBUG){Log.d(TAG,"Request permission mainloop");}mainloop();}}}}; /** * <p>Unescapes any Java literals found in the <code>String</code> to a * <code>Writer</code>.</p> * * <p>For example, it will turn a sequence of <code>'\'</code> and * <code>'n'</code> into a newline character, unless the <code>'\'</code> * is preceded by another <code>'\'</code>.</p> * * <p>A <code>null</code> string input has no effect.</p> * * @param str the <code>String</code> to unescape, may be null * @throws IllegalArgumentException if the Writer is <code>null</code> * @throws IOException if error occurs on underlying Writer */ private String unescapeJava(String str) throws IOException { if (str == null) { return ""; } int sz = str.length(); StringBuffer unicode = new StringBuffer(4); StringBuilder strout = new StringBuilder(); boolean hadSlash = false; boolean inUnicode = false; for (int i = 0; i < sz; i++) { char ch = str.charAt(i); if (inUnicode) { // if in unicode, then we're reading unicode // values in somehow unicode.append(ch); if (unicode.length() == 4) { // unicode now contains the four hex digits // which represents our unicode character try { int value = Integer.parseInt(unicode.toString(), 16); strout.append((char) value); unicode.setLength(0); inUnicode = false; hadSlash = false; } catch (NumberFormatException nfe) { // throw new NestableRuntimeException("Unable to parse unicode value: " + unicode, nfe); throw new IOException("Unable to parse unicode value: " + unicode, nfe); } } continue; } if (hadSlash) { // handle an escaped value hadSlash = false; switch (ch) { case '\\': strout.append('\\'); break; case '\'': strout.append('\''); break; case '\"': strout.append('"'); break; case 'r': strout.append('\r'); break; case 'f': strout.append('\f'); break; case 't': strout.append('\t'); break; case 'n': strout.append('\n'); break; case 'b': strout.append('\b'); break; case 'u': { // uh-oh, we're in unicode country.... inUnicode = true; break; } default: strout.append(ch); break; } continue; } else if (ch == '\\') { hadSlash = true; continue; } strout.append(ch); } if (hadSlash) { // then we're in the weird case of a \ at the end of the // string, let's output it anyway. strout.append('\\'); } return new String(strout.toString()); } @Override public void onAttach(Activity activity) { super.onAttach(activity); ((MainActivity) activity).onSectionAttached(getArguments().getInt(MainActivity.ARG_SECTION_NUMBER)); } }