안드로이드 Thread.UncaughtExceptionHandler 사용하여 앱 비정상 종료시 로그출력 예제

Thread.UncaughtExceptionHandler 사용하여  앱 비정상 종료시 로그출력 예제

java)

package com.wnet.uncaughtex;
 
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
 
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
 
public class MainActivity extends AppCompatActivity {
 
    Thread.UncaughtExceptionHandler mUncaughtExceptionHandler;
 
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        mUncaughtExceptionHandler = Thread.getDefaultUncaughtExceptionHandler();
        Thread.setDefaultUncaughtExceptionHandler(new UncaughtExceptionHandlerApplication());
 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
 
        Button btnError1 = (Button)findViewById(R.id.btnError1);
        btnError1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                try{
                    Thread.sleep(1000);
                }catch (InterruptedException e){
                    e.printStackTrace();
                }
 
                int test = 1/0;
            }
        });
    }
 
 
    class UncaughtExceptionHandlerApplication implements Thread.UncaughtExceptionHandler {
        @Override
        public void uncaughtException(Thread t, Throwable e) {
            Log.d("error", t.getName()+" : "+getStackTrace(e));
        }
 
 
        private String getStackTrace(Throwable th){
            final Writer result = new StringWriter();
            final PrintWriter printWriter = new PrintWriter(result);
 
            Throwable cause = th;
            while(cause!=null){
                cause.printStackTrace(printWriter);
                cause = cause.getCause();
            }
 
            final String stacktraceAsString = result.toString();
            printWriter.close();
 
            return stacktraceAsString;
        }
    }
}
 

결과

버튼 클릭시 0으로 나눌려고 했기 때문에 에러가 나오고 그 에러를 캐치하여 로그로 출력해준다

01-31 16:25:23.610 31066-31066/com.wnet.uncaughtex D/AndroidRuntime: Shutting down VM
01-31 16:25:23.610 31066-31066/com.wnet.uncaughtex D/error: main : java.lang.ArithmeticException: divide by zero
                                                                at com.wnet.uncaughtex.MainActivity$1.onClick(MainActivity.java:37)
                                                                at android.view.View.performClick(View.java:5697)
                                                                at android.widget.TextView.performClick(TextView.java:10814)
                                                                at android.view.View$PerformClick.run(View.java:22526)
                                                                at android.os.Handler.handleCallback(Handler.java:739)
                                                                at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                at android.os.Looper.loop(Looper.java:158)
                                                                at android.app.ActivityThread.main(ActivityThread.java:7224)
                                                                at java.lang.reflect.Method.invoke(Native Method)
                                                                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
                                                                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)