Error Reporter : UncaughtExceptionHandler « Development « Android






Error Reporter

    
/*
    This file is part of Brewzor.

    Copyright (C) 2010 James Whiddon

    Brewzor 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 3 of the License, or
    (at your option) any later version.

    Brewzor 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 Brewzor.  If not, see <http://www.gnu.org/licenses/>.

*/
//package com.brewzor.utils;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.util.Date;
import java.util.Random;

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Environment;
import android.os.StatFs;

// based on code from http://androidblogger.blogspot.com/2009/12/how-to-improve-your-application-crash.html
class ErrorReporter implements Thread.UncaughtExceptionHandler {

  static private final String EOL = "\n";
  
  String VersionName;
  String PackageName;
  String FilePath;
  String PhoneModel;
  String AndroidVersion;
  String Board;
  String Brand;
  String Device;
  String Display;
  String FingerPrint;
  String Host; 
  String ID;
  String Manufacturer;
  String Model;
  String Product;
  String Tags;
  long Time;
  String Type;
  String User; 

  private Thread.UncaughtExceptionHandler PreviousHandler;
  private static ErrorReporter S_mInstance;
  private Context CurContext;

  public void Init(Context context) {
    PreviousHandler = Thread.getDefaultUncaughtExceptionHandler();
    Thread.setDefaultUncaughtExceptionHandler(this);  
    getEnvironmentInfo(context);
    CurContext = context;
  }

  public long getAvailableInternalMemorySize() { 
    File path = Environment.getDataDirectory(); 
    StatFs stat = new StatFs(path.getPath()); 
    long blockSize = stat.getBlockSize(); 
    long availableBlocks = stat.getAvailableBlocks(); 
    return availableBlocks * blockSize; 
  } 

  public long getTotalInternalMemorySize() { 
    File path = Environment.getDataDirectory(); 
    StatFs stat = new StatFs(path.getPath()); 
    long blockSize = stat.getBlockSize(); 
    long totalBlocks = stat.getBlockCount(); 
    return totalBlocks * blockSize; 
  } 

  void getEnvironmentInfo(Context context)
  {
    PackageManager pm = context.getPackageManager();
    try
    {
      PackageInfo pi;

      // populate environment info variables
      pi = pm.getPackageInfo(context.getPackageName(), 0);
      VersionName = pi.versionName;
      PackageName = pi.packageName;
      FilePath = context.getFilesDir().getAbsolutePath();
      PhoneModel = android.os.Build.MODEL;
      AndroidVersion = android.os.Build.VERSION.RELEASE;
      Board = android.os.Build.BOARD;      
      Brand  = android.os.Build.BRAND;
      Device  = android.os.Build.DEVICE;
      Display = android.os.Build.DISPLAY;
      FingerPrint = android.os.Build.FINGERPRINT;
      Host = android.os.Build.HOST;
      ID = android.os.Build.ID;
      Model = android.os.Build.MODEL;
      Product = android.os.Build.PRODUCT;
      Tags = android.os.Build.TAGS;
      Time = android.os.Build.TIME;
      Type = android.os.Build.TYPE;
      User = android.os.Build.USER;

    }
    catch (NameNotFoundException e)
    {
      e.printStackTrace();
    }
  }

  public String CreateInformationString()
  {
    String ReturnVal = "";
    ReturnVal += "Version : " + VersionName + EOL;
    ReturnVal += "Package : " + PackageName + EOL;
    ReturnVal += "FilePath : " + FilePath + EOL;
    ReturnVal += "Phone Model" + PhoneModel + EOL;
    ReturnVal += "Android Version : " + AndroidVersion + EOL;
    ReturnVal += "Board : " + Board + EOL;
    ReturnVal += "Brand : " + Brand + EOL;
    ReturnVal += "Device : " + Device + EOL;
    ReturnVal += "Display : " + Display + EOL;
    ReturnVal += "Finger Print : " + FingerPrint + EOL;
    ReturnVal += "Host : " + Host + EOL;
    ReturnVal += "ID : " + ID + EOL;
    ReturnVal += "Model : " + Model + EOL;
    ReturnVal += "Product : " + Product + EOL;
    ReturnVal += "Tags : " + Tags + EOL;
    ReturnVal += "Time : " + Time + EOL;
    ReturnVal += "Type : " + Type + EOL;
    ReturnVal += "User : " + User + EOL;
    ReturnVal += "Total Internal memory : " + getTotalInternalMemorySize() + EOL;
    ReturnVal += "Available Internal memory : " + getAvailableInternalMemorySize() + EOL;

    return ReturnVal;
  }

  public void uncaughtException(Thread t, Throwable e)
  {
    String Report = "";
    Date CurDate = new Date();
    Report += "Error Report collected on : " + CurDate.toString() + EOL + EOL;
    Report += "Information :" + EOL;
    Report += "" + EOL + EOL;
    Report += CreateInformationString() + EOL + EOL;
    Report += "Stack :" + EOL;
    Report += "" + EOL;
    
    final Writer result = new StringWriter();
    final PrintWriter printWriter = new PrintWriter(result);
    e.printStackTrace(printWriter);
    String stacktrace = result.toString();
    Report += stacktrace + EOL;

    // If the exception was thrown in a background thread inside
    // AsyncTask, then the actual exception can be found with getCause
    Throwable cause = e.getCause();
    if (cause != null) {
      Report += "Cause :" + EOL;
      Report += "" + EOL;
      while (cause != null)
      {
        cause.printStackTrace(printWriter);
        Report += result.toString();
        cause = cause.getCause();
      }
    }
    printWriter.close();
    Report += "****  End of current Report ***" + EOL;
    SaveAsFile(Report);
    PreviousHandler.uncaughtException(t, e);
  }

  public void deleteAllReports() {
    String[] ErrorFileList = GetErrorFileList();
    for (String curString : ErrorFileList) {
      File curFile = new File(FilePath + "/" + curString);
      curFile.delete();
    }
  }
  
  public static ErrorReporter getInstance()
  {
    if (S_mInstance == null)
      S_mInstance = new ErrorReporter();
    return S_mInstance;
  }

  private void SendErrorMail(Context _context, String ErrorContent)
  {
    Intent sendIntent = new Intent(Intent.ACTION_SEND);
    String subject =  "crash_report_mail_subject";
    String body = "crash_report_mail_body" + EOL + EOL +
    ErrorContent +
    EOL + EOL;
    sendIntent.putExtra(Intent.EXTRA_EMAIL, new String[] {"james@brewzor.com"});
    sendIntent.putExtra(Intent.EXTRA_TEXT, body);
    sendIntent.putExtra(Intent.EXTRA_SUBJECT, subject);
    sendIntent.setType("message/rfc822");
    _context.startActivity(Intent.createChooser(sendIntent, "Send Email Via:"));
  }
  
  private void SaveAsFile(String ErrorContent)
  {
    try
    {
      Random generator = new Random();
      int random = generator.nextInt(99999);
      String FileName = "stack-" + random + ".stacktrace";
      FileOutputStream trace = CurContext.openFileOutput( FileName, Context.MODE_PRIVATE);
      trace.write(ErrorContent.getBytes());
      trace.close();
    }
    catch(IOException ioe) {
      // ...
    }
  }

  private String[] GetErrorFileList()
  {
    File dir = new File(FilePath + "/");
    // Try to create the files folder if it doesn't exist
    dir.mkdir();
    // Filter for ".stacktrace" files
    FilenameFilter filter = new FilenameFilter() {
      public boolean accept(File dir, String name) {
        return name.endsWith(".stacktrace");
      }
    };
    return dir.list(filter);
  }
  
  public boolean bIsThereAnyErrorFile()
  {
    return GetErrorFileList().length > 0;
  }
  
  public void CheckErrorAndSendMail(Context _context)
  {
    try
    {
      if (bIsThereAnyErrorFile())
      {
        String WholeErrorText = "";
        String[] ErrorFileList = GetErrorFileList();
        int curIndex = 0;
        // We limit the number of crash reports to send ( in order not to be too slow )
        final int MaxSendMail = 2;
        for (String curString : ErrorFileList)
        {
          if (curIndex++ <= MaxSendMail)
          {
            WholeErrorText+="New Trace collected :" + EOL;
            WholeErrorText+="" + EOL;
            String filePath = FilePath + "/" + curString;
            BufferedReader input =  new BufferedReader(new FileReader(filePath));
            String line;
            while ((line = input.readLine()) != null)
            {
              WholeErrorText += line + EOL;
            }
            input.close();
          }

          // DELETE FILES !!!!
          File curFile = new File( FilePath + "/" + curString);
          curFile.delete();
        }

        SendErrorMail(_context , WholeErrorText);
      
        if (bIsThereAnyErrorFile())
        {
          // clear up any remaining reports
          deleteAllReports();
        }      

      }

    }
    catch(Exception e)
    {
      e.printStackTrace();
    }
  }
}

   
    
    
    
  








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