implements UncaughtExceptionHandler : UncaughtExceptionHandler « Development « Android

1. Android
2. Development
3. UncaughtExceptionHandler

implements UncaughtExceptionHandler

    
/**
 * Copyright (C) 2010 Christian Meyer
 * This file is part of Drupal Editor.
 *
 * Drupal Editor 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.
 *
 * Drupal Editor 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 Drupal Editor. If not, see <http://www.gnu.org/licenses/>.
 */
//package ch.dissem.android.utils;

import java.io.File;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.util.Date;
import java.util.Locale;

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


/**
 * {@link UncaughtExceptionHandler} that asks the user to send an e-mail with
 * some debug information to the developer.
 * 
 * @author christian
 */
public class CustomExceptionHandler implements UncaughtExceptionHandler {
  private static final String RECIPIENT = "chrigu.meyer@gmail.com";

  private Thread.UncaughtExceptionHandler previousHandler;
  private Context context;

  public CustomExceptionHandler(Context ctx, UncaughtExceptionHandler previous) {
    previousHandler = previous;
    context = ctx;
  }

  private StatFs getStatFs() {
    File path = Environment.getDataDirectory();
    return new StatFs(path.getPath());
  }

  private long getAvailableInternalMemorySize(StatFs stat) {
    long blockSize = stat.getBlockSize();
    long availableBlocks = stat.getAvailableBlocks();
    return availableBlocks * blockSize;
  }

  private long getTotalInternalMemorySize(StatFs stat) {
    long blockSize = stat.getBlockSize();
    long totalBlocks = stat.getBlockCount();
    return totalBlocks * blockSize;
  }

  private void addInformation(StringBuilder message) {
    message.append("Locale: ").append(Locale.getDefault()).append('\n');
    try {
      PackageManager pm = context.getPackageManager();
      PackageInfo pi;
      pi = pm.getPackageInfo(context.getPackageName(), 0);
      message.append("Version: ").append(pi.versionName).append('\n');
      message.append("Package: ").append(pi.packageName).append('\n');
    } catch (Exception e) {
      Log.e("CustomExceptionHandler", "Error", e);
      message.append("Could not get Version information for ").append(
          context.getPackageName());
    }
    message.append("Phone Model: ").append(android.os.Build.MODEL).append(
        '\n');
    message.append("Android Version: ").append(
        android.os.Build.VERSION.RELEASE).append('\n');
    message.append("Board: ").append(android.os.Build.BOARD).append('\n');
    message.append("Brand: ").append(android.os.Build.BRAND).append('\n');
    message.append("Device: ").append(android.os.Build.DEVICE).append('\n');
    message.append("Host: ").append(android.os.Build.HOST).append('\n');
    message.append("ID: ").append(android.os.Build.ID).append('\n');
    message.append("Model: ").append(android.os.Build.MODEL).append('\n');
    message.append("Product: ").append(android.os.Build.PRODUCT).append(
        '\n');
    message.append("Type: ").append(android.os.Build.TYPE).append('\n');
    StatFs stat = getStatFs();
    message.append("Total Internal memory: ").append(
        getTotalInternalMemorySize(stat)).append('\n');
    message.append("Available Internal memory: ").append(
        getAvailableInternalMemorySize(stat)).append('\n');
  }

  public void uncaughtException(Thread t, Throwable e) {
    try {
      StringBuilder report = new StringBuilder();
      Date curDate = new Date();
      report.append("Error Report collected on : ").append(
          curDate.toString()).append('\n').append('\n');

      report.append("Informations :").append('\n');

      addInformation(report);

      report.append('\n').append('\n');
      report.append("Stack:\n");
      final Writer result = new StringWriter();
      final PrintWriter printWriter = new PrintWriter(result);
      e.printStackTrace(printWriter);
      report.append(result.toString());
      printWriter.close();
      report.append('\n');
      report.append("****  End of current Report ***");
      sendErrorMail(report);
    } catch (Throwable ignore) {
      Log.e(CustomExceptionHandler.class.getName(),
          "Error while sending error e-mail", ignore);
    }
    previousHandler.uncaughtException(t, e);
  }

  private void sendErrorMail(StringBuilder errorContent) {
    Intent sendIntent = new Intent(Intent.ACTION_SEND);
    String subject = "app_name crashed! Fix it!";
    StringBuilder body = new StringBuilder("app_name");
    body.append('\n').append('\n');
    body.append(errorContent).append('\n').append('\n');
    sendIntent.putExtra(Intent.EXTRA_EMAIL, new String[] { RECIPIENT });
    sendIntent.putExtra(Intent.EXTRA_TEXT, body.toString());
    sendIntent.putExtra(Intent.EXTRA_SUBJECT, subject);
    sendIntent.setType("message/rfc822");
    context.startActivity(Intent.createChooser(sendIntent, "Error Report"));
  }
}

   
    
    
    
  

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