安卓程序崩溃错误捕捉

public class CrashHandler implements Thread.UncaughtExceptionHandler {
    private static CrashHandler instance;

    public static CrashHandler getInstance() {
        if (instance == null) {
            instance = new CrashHandler();
        }
        return instance;
    }

    public void init(Context ctx) {
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    /**
     * 核心方法，当程序crash 会回调此方法， Throwable中存放这错误日志
     */
    @Override
    public void uncaughtException(Thread arg0, Throwable arg1) {

        String logPath;
        if (Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED)) {
            logPath = Environment.getExternalStorageDirectory()
                    .getAbsolutePath()
                    + File.separator
                    + File.separator
                    + "log";
            File file = new File(logPath);
            if (!file.exists()) {
                file.mkdirs();
            }
            try {
                FileWriter fw = new FileWriter(logPath + File.separator
                        + "E"+AppTimeUtils.formatDate(new Date(), "yyMMdd")+"log.log", true);
                fw.write(new Date() + "\r\n");
                fw.write("MedchCode："+AppInfoKeeper.getMedchCode()+ "\r\n");
                StackTraceElement[] stackTrace = arg1.getStackTrace();
                fw.write(arg1.getMessage() + "\r\n");
                for (int i = 0; i < stackTrace.length; i++) {
                    fw.write("file:" + stackTrace[i].getFileName() + " class:"
                            + stackTrace[i].getClassName() + " method:"
                            + stackTrace[i].getMethodName() + " line:"
                            + stackTrace[i].getLineNumber() + "\r\n");
                }
                fw.write("\r\n");
                fw.write("------------over_it-----------------");
                fw.close();
                ToastUtils.showToast("系统发生故障，请联系管理员。");
                //WriteLog.writeTxtToFile("File_url==>"+logPath + File.separator + "E"+AppTimeUtils.formatDate(new Date(), "yyMMdd")+"log.log");
                // 上传错误信息到服务器
                // uploadToServer();
            } catch (IOException e) {

                WriteLog.writeTxtToFile("load file failed..."+ e.getCause());
            }
        }
        arg1.printStackTrace();
        android.os.Process.killProcess(android.os.Process.myPid());
    }
}

CrashHandler crashHandler=CrashHandler.getInstance();
crashHandler.init(this);