Android/ErrorLogStack

エラーリストが取得用途

エラーレポーティング用途などで・・stacktraceエラーリストが取得できる

以下コードはfirebase-crashlyticsなどと併用可能だった。

CustomUncaughtExceptionHandler.java

import android.content.Context;
import android.content.SharedPreferences;
import java.io.PrintWriter;
import java.io.StringWriter;
public class CustomUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {
    private Context mContext;
    private Thread.UncaughtExceptionHandler mDefaultUncaughtExceptionHandler;
    public CustomUncaughtExceptionHandler(Context context) {
        mContext = context;
        mDefaultUncaughtExceptionHandler = Thread.getDefaultUncaughtExceptionHandler(); // 既に登録されてるものを退避
    }
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        StringWriter stringWriter = new StringWriter();
        ex.printStackTrace(new PrintWriter(stringWriter));
        String stackTrace = stringWriter.toString();
        Log.d("error", "stackTrace=" + stackTrace);  // stackTraceこれがstacktraceエラーリスト
        mDefaultUncaughtExceptionHandler.uncaughtException(thread, ex);
    }
}

ExampleClass.java

public class ExampleClass {
    public static void test() {
        new ArrayList<String>().get(0); //  エラーを起こす
    }
}

MainActivity.java

import android.content.Context;
import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        CustomUncaughtExceptionHandler customUncaughtExceptionHandler = new CustomUncaughtExceptionHandler(
                getApplicationContext());
        Thread.setDefaultUncaughtExceptionHandler(customUncaughtExceptionHandler);
        ExampleClass.test();
    }
}

stacktraceエラーリストサンプル

java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
at java.util.ArrayList.get(ArrayList.java:308)
at com.example.mycrashapplication.ExampleClass.test(GNSHogehoge.java:8)
at com.example.mycrashapplication.MainActivity$1.onClick(MainActivity.java:33)
at android.view.View.performClick(View.java:5231)
at android.view.View$PerformClick.run(View.java:21190)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5554)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:746)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:636)

参考

https://dev.classmethod.jp/smartphone/android/android-app-exception/

https://kokufu.blogspot.com/2013/01/android-uncaughtexceptionhandler-anr.html