Capture android program crash logs

Capture android program crash logs

Main categories:

 

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. logoff; import android. telephony. telephonyManager; import android. text. textUtils; import android. util. log; import android. widget. toast;/*** capture android program crash logs * UncaughtException processing class. When the program encounters an Uncaught exception, this class is used to take over the program. ** @ author PMTOAM **/@ SuppressLint (SimpleDateFormat) public class CrashHandler implements UncaughtExceptionHandler {public static final String TAG = CrashHandler. class. getCanonicalName (); // The default UncaughtException class private Thread. uncaughtExceptionHandler mDefaultHandler; // CrashHandler INSTANCE private static CrashHandler INSTANCE = new CrashHandler (); // The Context object private Context mContext of the program; // private Map used to store device information and exception information
 
  
Infos = new HashMap
  
   
(); // Used to format the date. As part of the log file name, private DateFormat formatter = new SimpleDateFormat (yyyyMMdd_HHmmss);/*** ensure that there is only one instance */private CrashHandler () {}/*** get INSTANCE, Singleton mode */public static CrashHandler getInstance () {return INSTANCE ;} /*** initialize ** @ param context */public void init (Context context) {mContext = context; // obtain the default UncaughtException processor mDefaultHandler = Thread. getDefaultUncaughtExceptionHandler (); // set the CrashHa Ndler is the default processor Thread of the program. setDefaultUncaughtExceptionHandler (this);}/*** when UncaughtException occurs, it will be transferred to this function for processing */@ Overridepublic void uncaughtException (Thread thread, Throwable ex) {if (! HandleException (ex) & mDefaultHandler! = Null) {// if the user does not process the mDefaultHandler, the system's default exception processor is used to process the mDefaultHandler. uncaughtException (thread, ex);} else {try {Thread. sleep (3000);} catch (InterruptedException e) {Log. e (TAG, error:, e) ;}// exit the android program. OS. process. killProcess (android. OS. process. myPid (); System. exit (1) ;}/ *** custom error handling, collecting error information, and sending error reports are all completed here. ** @ param ex * @ return true: If the exception information is processed, false is returned. */private boolean handleException (Throwable ex) {if (ex = null ){ Return false;} // use Toast to display the exception information new Thread () {@ Overridepublic void run () {loid. prepare (); Toast. makeText (mContext, sorry, the program encountered an exception ., Toast. LENGTH_LONG ). show (); logoff. loop ();}}. start (); // collect the device parameter information collectDeviceInfo (mContext); // Save the 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 when 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 the error message to the file ** @ param ex * @ return returns the file name, transfers files to the server */private String saveCrashInfo2File (Throwable ex) {StringBuffer sb = new StringBuffer (); for (Map. entry
   
    
Entry: infos. entrySet () {String key = entry. getKey (); String value = entry. getValue (); sb. append ([+ key +, + value +]);} sb. append (+ 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;}/*** get the caught exception String */public static String getStackTraceString (Throwable tr) {if (tr = null) {retu Rn;} 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 ();}}
   
  
 

 

Usage:

 

 

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());}}