Capture Android Program crash log

Main classes:

Package Com.example.callstatus;import Java.io.file;import Java.io.fileoutputstream;import java.io.PrintWriter; Import Java.io.stringwriter;import Java.lang.thread.uncaughtexceptionhandler;import Java.lang.reflect.Field; Import Java.net.unknownhostexception;import Java.text.dateformat;import Java.text.simpledateformat;import Java.util.date;import Java.util.hashmap;import Java.util.map;import Android.annotation.suppresslint;import Android.content.context;import Android.content.pm.packageinfo;import Android.content.pm.packagemanager;import Android.content.pm.packagemanager.namenotfoundexception;import Android.os.build;import android.os.Environment; Import Android.os.looper;import Android.telephony.telephonymanager;import Android.text.textutils;import Android.util.log;import android.widget.toast;/** * Capture Android Program crash log <br> * Uncaughtexception processing class, This class takes over the program when a uncaught exception occurs. * * @author PMTOAM * * */@SuppressLint ("SimpleDateFormat") public class Crashhandler implements UncaughtexceptionhandLer{public static final String TAG = CrashHandler.class.getCanonicalName ();//system default Uncaughtexception processing class private Thread.uncaughtexceptionhandler mdefaulthandler;//Crashhandler Instance private static Crashhandler INSTANCE = new Crashhandler ();//Program Context object private context mcontext;//used to store device information and exception information private map<string, string> infos = new Hashmap<string, string> ();//used to format the date as part of the log file name private DateFormat formatter = new SimpleDateFormat ("Yyyymmdd_ Hhmmss ");/** * Guaranteed only one instance */private Crashhandler () {}/** * Get instance, Singleton mode */public static Crashhandler getinstance () {return INSTA NCE;} /** * Initialize * * @param context */public void init (context context) {Mcontext = context;//get system default Uncaughtexception processor Mdefaul Thandler = Thread.getdefaultuncaughtexceptionhandler ();// Set the Crashhandler as the program's default processor Thread.setdefaultuncaughtexceptionhandler (this);} /** * When uncaughtexception occurs, it is transferred to the function to process */@Overridepublic void uncaughtexception (thread thread, Throwable ex) {if (! HandleException (ex) && Mdefaulthandler! = null) {Let the system default exception handler handle mdefaulthandler.uncaughtexception (thread, ex) if the user does not handle it;} Else{try{thread.sleep (3000);} catch (Interruptedexception e) {log.e (TAG, "error:", e);} Exit Program Android.os.Process.killProcess (Android.os.Process.myPid ()); System.exit (1);}} /** * Custom error handling, collect error messages to send error reports, etc. are done here. * * @param ex * @return true: Returns False if the exception information is processed; */private boolean handleexception (Throwable ex) {if (ex = = null) {return false;} Use Toast to display exception information new Thread () {@Overridepublic void run () {looper.prepare (); Toast.maketext (Mcontext, "Sorry, the program has an exception.) ", Toast.length_long). Show (); Looper.loop ();}}. Start ();//Collect device parameter information collectdeviceinfo (mcontext);//save log file String str = Savecrashinfo2file (ex); LOG.E (TAG, str); return false;} /** * Collect device parameter information * * @param ctx */public void Collectdeviceinfo (Context ctx) {Try{packagemanager pm = Ctx.getpackagemanager ( ); PackageInfo pi = pm.getpackageinfo (Ctx.getpackagename (), packagemanager.get_activities); if (pi! = null) {String Versionname = Pi.versionname = = null? "NULL": Pi.versionname; String VersioncOde = Pi.versioncode + ""; Infos.put ("Versionname", Versionname); Infos.put ("Versioncode", Versioncode);}} catch (Namenotfoundexception e) {log.e (TAG, "An error occured if collect package info", e);} field[] fields = Build.class.getDeclaredFields (), for (Field field:fields) {try{field.setaccessible (true); Infos.put ( Field.getname (), Field.get (null). ToString ()); LOG.D (TAG, Field.getname () + ":" + field.get (null));} catch (Exception e) {log.e (TAG, "An error occured when collect crash info", e);}} /** * Save error message to file * * @param ex * @return return file name for easy Transfer of file to server */private String Savecrashinfo2file (Throwable ex) {Stringbuffe R sb = new StringBuffer (); for (map.entry<string, string> entry:infos.entrySet ()) {String key = Entry.getkey (); String value = Entry.getvalue (); Sb.append ("[" + Key + "," + Value + "]\n");} Sb.append ("\ n" + getstacktracestring (ex)), try{string time = Formatter.format (new Date ()); Telephonymanager mtelephonymgr = (telephonymanager) mcontext.getsystemservice (Context.telephony_serviCE); String IMEI = Mtelephonymgr.getdeviceid (), if (Textutils.isempty (IMEI)) {IMEI = "Unknownimei";} String fileName = "Crs_" + Time + "_" + IMEI + ". txt"; File Sddir = null;if (Environment.getexternalstoragestate (). Equals (Android.os.Environment.MEDIA_MOUNTED)) Sddir = Environment.getexternalstoragedirectory (); File Cachedir = new file (Sddir + file.separator + "Dphonelog"), if (!cachedir.exists ()) Cachedir.mkdir (); File FilePath = new file (Cachedir + file.separator + fileName); FileOutputStream fos = new FileOutputStream (FilePath); Fos.write (Sb.tostring (). GetBytes ()); Fos.close (); return FileName;} catch (Exception e) {log.e (TAG, "An error occured while writing file ...", e);} return null;} /** * Gets the string that catches the exception */public static string getstacktracestring (Throwable tr) {if (tr = = null) {return "";} Throwable t = tr;while (t! = null) {if (T instanceof unknownhostexception) {return "";} t = T.getcause ();} StringWriter SW = new StringWriter (); PrintWriter pw = new PrintWriter (SW); Tr.printstacktrace (PW); return Sw.tostriNg ();}} 

How to use:

Package Com.example.callstatus;import Android.app.application;public class MyApplication extends application{@ overridepublic void OnCreate () {super.oncreate (); Crashhandler Crashhandler = Crashhandler.getinstance (); Crashhandler.init (Getapplicationcontext ());}}

Required Permissions:

<uses-permission android:name= "Android.permission.READ_PHONE_STATE"/><uses-permission android:name= " Android.permission.WRITE_EXTERNAL_STORAGE "/><uses-permission android:name=" android.permission.MOUNT_ Unmount_filesystems "/>

Capture Android Program crash log