Android程序捕获未处理异常，处理与第三方方法冲突时的异常传递

public class CrashHandler implements UncaughtExceptionHandler
{

    public static final String TAG = "CrashHandler";

    // CrashHandler 实例
    private static CrashHandler INSTANCE = new CrashHandler();

    // 程序的 Context 对象
    private Context mContext;

    // 系统默认的 UncaughtException 处理类
    private Thread.UncaughtExceptionHandler mDefaultHandler;

    // 用来存储设备信息和异常信息
    private Map<String, String> infos = new HashMap<String, String>();

    // 用于格式化日期,作为日志文件名的一部分
    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

    /** 保证只有一个 CrashHandler 实例 */
    private CrashHandler()
    {
    }

    /** 获取 CrashHandler 实例 ,单例模式 */
    public static CrashHandler getInstance()
    {
        return INSTANCE;
    }

    /**
     * 初始化
     * 
     * @param context
     */
    public void init(Context context)
    {
        mContext = context;
        // 获取系统默认的 UncaughtException 处理器
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        // 设置该 CrashHandler 为程序的默认处理器
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    /**
     * 当 UncaughtException 发生时会转入该函数来处理
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex)
    {
        if (!handleException(ex) && mDefaultHandler != null)
        {
            // 如果用户没有处理则让系统默认的异常处理器来处理
            LogUtil.i("wepa mDefaultHandler beg");
            mDefaultHandler.uncaughtException(thread, ex);
        } else
        {
            try
            {
                Thread.sleep(2000);
            } catch (InterruptedException e)
            {
                LogUtil.e("error : ", e);
            }
            LogUtil.i("wepa killProcess beg");
            // 退出程序
            // 清除栈
            List<Activity> openedActivity = ((WepaApplication) mContext)
                    .getOpenedActivity();
            for (Activity activity : openedActivity)
            {
                if (activity != null)
                {
                    LogUtil.d("activity getComponentName : "
                            + activity.getComponentName());
                    activity.finish();
                }
            }
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(1);

            /*
             * // 重新启动程序，注释上面的退出程序 Intent intent = new Intent();
             * intent.setClass(mContext, MainPageActivity.class);
             * intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
             * mContext.startActivity(intent);
             * android.os.Process.killProcess(android.os.Process.myPid());
             */
        }
    }

    /**
     * 自定义错误处理，收集错误信息，发送错误报告等操作均在此完成
     * 
     * @param ex
     * @return true：如果处理了该异常信息；否则返回 false
     */
    private boolean handleException(Throwable ex)
    {
        if (ex == null)
        {
            return false;
        }
        LogUtil.i("wepa handleException beg");
        new Thread()
        {
            @Override
            public void run()
            {
                Looper.prepare();
                Toast.makeText(mContext, "很抱歉，程序遇到异常，即将退出", Toast.LENGTH_SHORT)
                        .show();
                Looper.loop();
            }
        }.start();
        // 收集设备参数信息
        collectDeviceInfo(mContext);
        // 保存日志文件
        saveCrashInfo2File(ex);
        // 使用 Toast 来显示异常信息
        LogUtil.i("wepa saveCrashInfo2File OK");
        return true;
    }

    /**
     * 收集设备参数信息
     * 
     * @param ctx
     */
    public void collectDeviceInfo(Context ctx)
    {
        try
        {
            PackageManager pm = ctx.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(),
                    PackageManager.GET_ACTIVITIES);

            if (pi != null)
            {
                String versionName = pi.versionName == null ? "null"
                        : pi.versionName;
                String versionCode = pi.versionCode + "";
                infos.put("versionName", versionName);
                infos.put("versionCode", versionCode);
            }
        } catch (NameNotFoundException e)
        {
            LogUtil.e("an error occured when collect package info", e);
        }

        Field[] fields = Build.class.getDeclaredFields();
        for (Field field : fields)
        {
            try
            {
                field.setAccessible(true);
                infos.put(field.getName(), field.get(null).toString());
                LogUtil.d(field.getName() + " : " + field.get(null));
            } catch (Exception e)
            {
                LogUtil.e("an error occured when collect crash info", e);
            }
        }
    }

    /**
     * 保存错误信息到文件中 *
     * 
     * @param ex
     * @return 返回文件名称,便于将文件传送到服务器
     */
    private String saveCrashInfo2File(Throwable ex)
    {
        StringBuffer sb = new StringBuffer();
        for (Map.Entry<String, String> entry : infos.entrySet())
        {
            String key = entry.getKey();
            String value = entry.getValue();
            sb.append(key + "=" + value + "
");
        }

        Writer writer = new StringWriter();
        PrintWriter printWriter = new PrintWriter(writer);
        ex.printStackTrace(printWriter);
        Throwable cause = ex.getCause();
        while (cause != null)
        {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }
        printWriter.close();

        String result = writer.toString();
        sb.append(result);
        try
        {
            long timestamp = System.currentTimeMillis();
            String time = formatter.format(new Date());
            String fileName = "crash_" + time + "_" + timestamp + ".log";

            if (Environment.getExternalStorageState().equals(
                    Environment.MEDIA_MOUNTED))
            {
                String path = Environment.getExternalStorageDirectory()
                        + "/crash/";
                File dir = new File(path);
                if (!dir.exists())
                {
                    dir.mkdirs();
                }
                FileOutputStream fos = new FileOutputStream(path + fileName);
                fos.write(sb.toString().getBytes());
                fos.close();
            }

            return fileName;
        } catch (Exception e)
        {
            LogUtil.e("an error occured while writing file...", e);
        }

        return null;
    }
}