"Android Live" processing crash exception in Android

public class Mainactivity extends Actionbaractivity {public crashapplication application; @Overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main); Application = (crashapplication) getapplication (); Application.addact (this); Button button = Null;button.setonclicklistener (new Onclicklistener () {@Overridepublic void OnClick (View v) {//TODO auto- Generated method stub}}); @Overridepublic boolean Oncreateoptionsmenu (Menu menu) {//Inflate the menu; This adds items to the action bar if it is PR Esent.getmenuinflater (). Inflate (R.menu.main, menu); return true;} @Overridepublic boolean onoptionsitemselected (MenuItem Item) {//Handle Action Bar item clicks here. The action bar will//automatically handle clicks on the Home/up button so long//as you specify a parent activity in and RoidManifest.xml.int id = item.getitemid (); if (id = = r.id.action_settings) {return true;} return super.onoptionsitemselected (item);}}

public class Crashapplication extends application {list<activity> activitylist = new arraylist<activity> (); @Overridepublic void OnCreate () {super.oncreate (); Crashhandler Crashhandler = Crashhandler.getinstance (); Crashhandler.init (Getapplicationcontext ());} public void Addact (Activity a) {Activitylist.add (a);} public void Delact (Activity a) {activitylist.remove (a);} public void Finishacts () {(Activity a:activitylist) {if (null! = a) {a.finish ();}} Android.os.Process.killProcess (Android.os.Process.myPid ());}}

public class Crashhandler implements Uncaughtexceptionhandler {public static final String TAG = "Crashhandler";//system default UNC Aughtexception 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> ();//For formatting dates, as part of the log file name private SimpleDateFormat Formatter = new SimpleDateFormat ("Yyyy-mm-dd-hh-mm-ss");/** guarantees that there is only one Crashhandler instance */private Crashhandler () {}/** Get Crashhandler instance, Singleton mode */public static Crashhandler getinstance () {return INSTANCE;} /** * Initialize * * @param context */public void init (context context) {Mcontext = context;//get system default Uncaughtexception processor Mdefau Lthandler = 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) {// Assume that the user does not handle the system by letting the default exception handler handle mdefaulthandler.uncaughtexception (thread, ex); try {thread.sleep);} catch ( Interruptedexception e) {log.e (TAG, "error:", e);} Exit Program Android.os.Process.killProcess (Android.os.Process.myPid ()); System.exit (1);} else {try {thread.sleep,} catch (Interruptedexception e) {log.e (TAG, "error:", e);} Exit program ((crashapplication) mcontext). Finishacts ();};} /** * self-defined error handling, collect error messages to send error reports and other operations are complete here. * * @param ex * @return true: It is assumed that the exception information was processed; otherwise, false is returned. */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, "very sorry, the program is abnormal, is about to exit.", Toast.length_long). Show (); Looper.loop ();}}. Start ();//Collection Device parameter information collectdeviceinfo (mcontext);//Save log file Savecrashinfo2file (ex); return true;} /** * Collection Device reference 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, convenient to transfer file to server */private string Savecrashinfo2file (Throwable ex) {string Buffer sb = new StringBuffer (); for (map.entry<string, string> entry:infos.entrySet ()) {String key = Entry.getkey () ; String value = Entry.getvalue (); Sb.append (key + "=" + value + "\ n");} Writer writer = new StringWriter (); PrintWriter printwriter = new PrintWriter (writer); Ex.printstacktrace (PrintWriter); Throwable cause = Ex.getcause (); while (cause! = null) {cause.printstacktrace (printwriter); cause = Cause.getcause ();} Printwriter.close (); String result = Writer.tostring (); Sb.append (result); try {long timestamp = System.currenttimemillis (); String time = Formatter.format (new Date ()); String fileName = "crash-" + Time + "-" + timestamp + ". Log"; if (Environment.getexternalstoragestate (). Equals (Environment. media_mounted) {String path = "/sdcard/crash/"; File dir = new file (path), if (!dir.exists ()) {dir.mkdirs ();} FileOutputStream fos = new FileOutputStream (path + fileName), Fos.write (Sb.tostring (). GetBytes ()); Fos.close (); return fileName;} catch (Exception e) {log.e (TAG, "An error occured while writing file ...", e);} return null;}}

"Android Live" processing crash exception in Android