Java tutorial
/* Copyright (c) 2009 nullwire aps 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. Contributors: Mads Kristiansen, mads.kristiansen@nullwire.com Glen Humphrey Evan Charlton Peter Hewitt */ package com.jeffthefate.stacktrace; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.FilenameFilter; import java.util.ArrayList; import java.util.List; import org.apache.http.NameValuePair; 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 org.apache.http.protocol.HTTP; import android.app.Application; import android.content.Context; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.content.pm.PackageManager.NameNotFoundException; import android.util.Log; public class ExceptionHandler { public static String TAG = "ExceptionsHandler"; private static String[] stackTraceFileList = null; public static OnStacktraceListener mCallback; public interface OnStacktraceListener { public void onStacktrace(String appPackage, String packageVersion, String phoneModel, String androidVersion, String stacktrace); } /** * Register handler for unhandled exceptions. * @param context */ public static boolean register(Application app) { mCallback = (OnStacktraceListener) app; Log.i(TAG, "Registering default exceptions handler"); // Get information about the Package PackageManager pm = app.getPackageManager(); try { PackageInfo pi; // Version pi = pm.getPackageInfo(app.getPackageName(), 0); G.APP_VERSION = pi.versionName; // Package name G.APP_PACKAGE = pi.packageName; // Files dir for storing the stack traces G.FILES_PATH = app.getFilesDir().getAbsolutePath(); // Device model G.PHONE_MODEL = android.os.Build.MODEL; // Android version G.ANDROID_VERSION = android.os.Build.VERSION.RELEASE; } catch (NameNotFoundException e) { e.printStackTrace(); } Log.d(TAG, "APP_VERSION: " + G.APP_VERSION); Log.d(TAG, "APP_PACKAGE: " + G.APP_PACKAGE); Log.d(TAG, "FILES_PATH: " + G.FILES_PATH); boolean stackTracesFound = false; // We'll return true if any stack traces were found if (searchForStackTraces().length > 0) stackTracesFound = true; new Thread() { @Override public void run() { // First of all transmit any stack traces that may be lying around submitStackTraces(); UncaughtExceptionHandler currentHandler = Thread.getDefaultUncaughtExceptionHandler(); if (currentHandler != null) { Log.d(TAG, "current handler class=" + currentHandler.getClass().getName()); } // don't register again if already registered if (!(currentHandler instanceof DefaultExceptionHandler)) { // Register default exceptions handler Thread.setDefaultUncaughtExceptionHandler(new DefaultExceptionHandler(currentHandler)); } } }.start(); return stackTracesFound; } /** * Search for stack trace files. * @return */ private static String[] searchForStackTraces() { if (stackTraceFileList != null) return stackTraceFileList; File dir = new File(G.FILES_PATH + "/"); // 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 (stackTraceFileList = dir.list(filter)); } /** * Look into the files folder to see if there are any "*.stacktrace" files. * If any are present, submit them to the trace server. */ public static void submitStackTraces() { try { Log.d(TAG, "Looking for exceptions in: " + G.FILES_PATH); String[] list = searchForStackTraces(); if (list != null && list.length > 0) { Log.d(TAG, "Found " + list.length + " stacktrace(s)"); for (int i = 0; i < list.length; i++) { String filePath = G.FILES_PATH + File.separator + list[i]; // Extract the version from the filename: // "packagename-version-...." String version = list[i].split("-")[0]; Log.d(TAG, "Stacktrace in file '" + filePath + "' belongs to version " + version); // Read contents of stacktrace StringBuilder contents = new StringBuilder(); BufferedReader input = new BufferedReader(new FileReader(filePath)); String line = null; String androidVersion = null; String phoneModel = null; while ((line = input.readLine()) != null) { if (androidVersion == null) { androidVersion = line; continue; } else if (phoneModel == null) { phoneModel = line; continue; } contents.append(line); contents.append(System.getProperty("line.separator")); } input.close(); String stacktrace = contents.toString(); mCallback.onStacktrace(G.APP_PACKAGE, version, phoneModel, androidVersion, stacktrace); } } } catch (Exception e) { e.printStackTrace(); } finally { try { String[] list = searchForStackTraces(); for (int i = 0; i < list.length; i++) { File file = new File(G.FILES_PATH + "/" + list[i]); file.delete(); } } catch (Exception e) { e.printStackTrace(); } } } }