Android(安卓)全局异常捕捉 + 本地异常日志

public class CrashHandler implements Thread.UncaughtExceptionHandler {    private static final Format FORMAT = new SimpleDateFormat("yy-MM-dd HH-mm-ss",Locale.getDefault());                             private static CrashHandler instance = null;    private Thread.UncaughtExceptionHandler defaultHandler;    private Context context;    public static CrashHandler getInstance() {        if (instance == null) {            synchronized (CrashHandler.class) {                if (instance == null) {                    synchronized (CrashHandler.class) {                        instance = new CrashHandler();                    }                }            }        }        return instance;    }    private CrashHandler() {    }    public void init(Context context) {        this.context = context;        defaultHandler = Thread.getDefaultUncaughtExceptionHandler();        Thread.setDefaultUncaughtExceptionHandler(this);    }    @Override    public void uncaughtException(final Thread t, final Throwable e) {        if (e == null) {            android.os.Process.killProcess(android.os.Process.myPid());            System.exit(0);            return;        }        new Thread(new Runnable() {            @Override            public void run() {                saveCrashToLocal(t,e);            }        }).start();    }    private void saveCrashToLocal(Thread t,final Throwable e){        Date now = new Date(System.currentTimeMillis());        String fileName = "crash_" + FORMAT.format(now) + ".log";        final String fullPath = FileUtil.getInstance().getCrashPath() + "/" + fileName;        FileUtil.getInstance().createNewFile(fullPath);        PrintWriter pw = null;        try {            pw = new PrintWriter(new FileWriter(fullPath, false));            e.printStackTrace(pw);            Throwable cause = e.getCause();            while (cause != null) {                cause.printStackTrace(pw);                cause = cause.getCause();            }        } catch (IOException exc) {            exc.printStackTrace();        } finally {            if (pw != null) {                pw.close();            }        }        if (defaultHandler != null) {            defaultHandler.uncaughtException(t, e);        }    }}
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