699. (Android/Java) Thread.UncaughtExceptionHandler 사용해 앱 사용 중 알 수 없는 에러 이벤트 감지 - App Used Error

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[개발 환경 설정]

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개발 툴 : AndroidStudio

 

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[소스 코드]

 

package com.example.javaproject;

import android.app.Activity;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

public class S_Crash implements Thread.UncaughtExceptionHandler {


    /**
     * // --------------------------------------------------------------------------------------
     * TODO [클래스 설명]
     * // --------------------------------------------------------------------------------------
     * 1. 앱 사용 중 발생한 Crash 크래시 리포트 저장 클래스
     * // --------------------------------------------------------------------------------------
     * 2. 호출 방법 : 각 액티비티 onCreate 에 선언 필요
     *
     * @Override
     * protected void onCreate(Bundle savedInstanceState) {
     *     super.onCreate(savedInstanceState);
     *
     *     // TODO [앱 크래시 리포트 저장]
     *     Thread.setDefaultUncaughtExceptionHandler(new S_Crash(this));
     * }
     *
     * // --------------------------------------------------------------------------------------
     * 3. 로그 저장 예시 :
     *
     * ----------------------------------------------------
     * [FILE SAVE TIME] : 2023-11-24 14:31:27 금요일
     * ----------------------------------------------------
     * [SAVE EXPLAIN] : uncaughtException : 예기치 못한 Exception 크래시 로그 저장
     * ----------------------------------------------------
     *
     * java.lang.NumberFormatException: For input string: "h"
     *
     *     java.lang.Integer.parseInt(Integer.java:747)
     *     java.lang.Integer.parseInt(Integer.java:865)
     *     com.example.javaproject.A_Intro.onCreate(A_Intro.java:364)
     *     android.app.Activity.performCreate(Activity.java:8591)
     *     android.app.Activity.performCreate(Activity.java:8570)
     *     android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1384)
     *     android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4150)
     *     android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4325)
     *     android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101)
     *     android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
     *     android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
     *     android.app.ActivityThread$H.handleMessage(ActivityThread.java:2574)
     *     android.os.Handler.dispatchMessage(Handler.java:106)
     *     android.os.Looper.loopOnce(Looper.java:226)
     *     android.os.Looper.loop(Looper.java:313)
     *     android.app.ActivityThread.main(ActivityThread.java:8762)
     *     java.lang.reflect.Method.invoke(Native Method)
     *     com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:604)
     *     com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067)
     *
     * ----------------------------------------------------
     *
     * // --------------------------------------------------------------------------------------
     * */





    /**
     * // --------------------------------------------------------------------------------------
     * // TODO [빠른 로직 찾기 : 주석 로직 찾기]
     * // --------------------------------------------------------------------------------------
     *
     * // --------------------------------------------------------------------------------------
     *
     * // --------------------------------------------------------------------------------------
     *
     * // --------------------------------------------------------------------------------------
     * */







    // -----------------------------------------------------------------------------------------
    // TODO [전역 변수 선언 실시]
    // -----------------------------------------------------------------------------------------
    private Thread.UncaughtExceptionHandler crashHandler;
    private Activity activity = null;






    // -----------------------------------------------------------------------------------------
    // TODO [클래스 생성자 초기화]
    // -----------------------------------------------------------------------------------------
    public S_Crash(Activity app) {
        this.crashHandler = Thread.getDefaultUncaughtExceptionHandler();
        this.activity = app;
    }





    // -----------------------------------------------------------------------------------------
    // TODO [예기치 못한 Exception 이벤트 감지 부분]
    // -----------------------------------------------------------------------------------------
    public void uncaughtException(Thread t, Throwable e) {

        if (this.activity != null){

            // [변수 선언 실시]
            String content = "";


            // [로직 처리 실시]
            try {

                // [날짜 데이터 확인 실시]
                String saveTime = "";
                long time = 0;
                try {
                    time = System.currentTimeMillis();
                    SimpleDateFormat dayTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss E요일", Locale.KOREA);
                    saveTime = dayTime.format(new Date(time));
                }
                catch (Exception ej){}

                
                // [Exception 예외 상황 로그 확인]

                // -----------------------------------------

                //*
                StringWriter err = new StringWriter();
                e.printStackTrace(new PrintWriter(err));

                String report = "\n" + err.toString() + "\n\n";
                // */

                // -----------------------------------------

                //*
                StackTraceElement[] arr = e.getStackTrace();
                report = report + "\n\n";

                Throwable cause = e.getCause();
                if(cause != null) {
                    report += cause.toString() + "\n\n";
                    arr = cause.getStackTrace();
                    for (int i=0; i<arr.length; i++) {
                        report += "    "+arr[i].toString()+"\n";
                    }
                }
                // */

                // -----------------------------------------


                // [로그 출력 형식 포맷]
                content = content + "\n" + "\n" + "\n";
                content = content + "----------------------------------------------------" + "\n";
                content = content + "[FILE SAVE TIME] : " + String.valueOf(saveTime) + "\n";
                content = content + "----------------------------------------------------" + "\n";
                content = content + "[SAVE EXPLAIN] : uncaughtException : 예기치 못한 Exception 크래시 로그 저장" + "\n";
                content = content + "----------------------------------------------------" + "\n";
                content = content + report + "\n";
                content = content + "----------------------------------------------------" + "\n";
                content = content + "\n" + "\n" + "\n";


                // [로그 출력]

            }
            catch (Exception eh){
            }

        }

        if (this.crashHandler != null){
            this.crashHandler.uncaughtException(t, e);
        }

    }


} // TODO [클래스 종료]

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