Android Enregistrement de votre propre gestionnaire pour des exceptions inattendues


Exemple

Voici comment vous pouvez réagir aux exceptions qui n'ont pas été détectées, comme le système standard "Application XYZ a planté"

import android.app.Application;
import android.util.Log;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

/**
 * Application class writing unexpected exceptions to a crash file before crashing.
 */
public class MyApplication extends Application {
    private static final String TAG = "ExceptionHandler";

    @Override
    public void onCreate() {
        super.onCreate();

        // Setup handler for uncaught exceptions.
        final Thread.UncaughtExceptionHandler defaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
            @Override
            public void uncaughtException(Thread thread, Throwable e) {
                try {
                    handleUncaughtException(e);
                    System.exit(1);
                } catch (Throwable e2) {
                    Log.e(TAG, "Exception in custom exception handler", e2);
                    defaultHandler.uncaughtException(thread, e);
                }
            }
        });
    }

    private void handleUncaughtException(Throwable e) throws IOException {
        Log.e(TAG, "Uncaught exception logged to local file", e);

        // Create a new unique file
        final DateFormat dateFormat =  new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss", Locale.US);
        String timestamp;
        File file = null;
        while (file == null || file.exists()) {
            timestamp = dateFormat.format(new Date());
            file = new File(getFilesDir(), "crashLog_" + timestamp + ".txt");
        }
        Log.i(TAG, "Trying to create log file " + file.getPath());
        file.createNewFile();

        // Write the stacktrace to the file
        FileWriter writer = null;
        try {
            writer = new FileWriter(file, true);
            for (StackTraceElement element : e.getStackTrace()) {
                writer.write(element.toString());
            }
        } finally {
            if (writer != null) writer.close();
        }

        // You can (and probably should) also display a dialog to notify the user
    }
}

Enregistrez ensuite cette classe d'application dans votre fichier AndroidManifest.xml:

<application android:name="de.ioxp.arkmobile.MyApplication" >