异常捕获

public class CrashHandler implements Thread.UncaughtExceptionHandler {    public static final String TAG = "TEST";    // 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>();    // 用来显示Toast中的信息    private static String error = "程序错误，额，不对，我应该说，服务器正在维护中，请稍后再试";    private static final Map<String, String> regexMap = 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",            Locale.CHINA);    /** 保证只有一个 CrashHandler 实例 */    private CrashHandler() {//    }    /** 获取 CrashHandler 实例 ,单例模式 */    public static CrashHandler getInstance() {        initMap();        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);        Log.d("TEST", "Crash:init");    }    /**     * 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            mDefaultHandler.uncaughtException(thread, ex);            Log.d("TEST", "defalut");        } else {            try {                Thread.sleep(3000);            } catch (InterruptedException e) {                Log.e(TAG, "error : ", e);            }// 退出程序            android.os.Process.killProcess(android.os.Process.myPid());// mDefaultHandler.uncaughtException(thread, ex);           // System.exit();        }    }    /**     * 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;        }// 收集设备参数信息// collectDeviceInfo(mContext);// 保存日志文件        saveCrashInfoFile(ex);// 使用 Toast 来显示异常信息        new Thread() {            @Override            public void run() {                Looper.prepare();                Toast.makeText(mContext, error, Toast.LENGTH_LONG).show();                Looper.loop();            }        }.start();        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 (Exception e) {            Log.e(TAG, "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());                Log.d(TAG, field.getName() + " : " + field.get(null));            } catch (Exception e) {                Log.e(TAG, "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 saveCrashInfoFile(Throwable ex) {        StringBuffer sb = getTraceInfo(ex);        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) {            Log.e(TAG, "an error occured while writing file...", e);        }        return null;    }    /**     * 整理异常信息     * @param e     * @return     */    public static StringBuffer getTraceInfo(Throwable e) {        StringBuffer sb = new StringBuffer();        Throwable ex = e.getCause() == null ? e : e.getCause();        StackTraceElement[] stacks = ex.getStackTrace();        for (int i = 0; i < stacks.length; i++) {            if (i == 0) {                setError(ex.toString());            }            sb.append("class: ").append(stacks[i].getClassName())                    .append("; method: ").append(stacks[i].getMethodName())                    .append("; line: ").append(stacks[i].getLineNumber())                    .append("; Exception: ").append(ex.toString() + "\n");        }        Log.d(TAG, sb.toString());        return sb;    }    /**     * 设置错误的提示语     * @param e     */    public static void setError(String e) {        Pattern pattern;        Matcher matcher;        for (Map.Entry<String, String> m : regexMap.entrySet()) {            Log.d(TAG, e+"key:" + m.getKey() + "; value:" + m.getValue());            pattern = Pattern.compile(m.getKey());            matcher = pattern.matcher(e);            if(matcher.matches()){                error = m.getValue();                break;            }        }    }    /**     * 初始化错误的提示语     */    private static void initMap() {// Java.lang.NullPointerException// java.lang.ClassNotFoundException// java.lang.ArithmeticException// java.lang.ArrayIndexOutOfBoundsException// java.lang.IllegalArgumentException// java.lang.IllegalAccessException// SecturityException// NumberFormatException// OutOfMemoryError// StackOverflowError// RuntimeException        regexMap.put(".*NullPointerException.*", "嘿，无中生有~Boom!");        regexMap.put(".*ClassNotFoundException.*", "你确定你能找得到它？");        regexMap.put(".*ArithmeticException.*", "我猜你的数学是体育老师教的，对吧？");        regexMap.put(".*ArrayIndexOutOfBoundsException.*", "恩，无下限=无节操，请不要跟我搭话");        regexMap.put(".*IllegalArgumentException.*", "你的出生就是一场错误。");        regexMap.put(".*IllegalAccessException.*", "很遗憾，你的信用卡账号被冻结了，无权支付");        regexMap.put(".*SecturityException.*", "死神马上降临");        regexMap.put(".*NumberFormatException.*", "想要改变一下自己形象？去泰国吧，包你满意");        regexMap.put(".*OutOfMemoryError.*", "或许你该减减肥了");        regexMap.put(".*StackOverflowError.*", "啊，啊，憋不住了！");        regexMap.put(".*RuntimeException.*", "你的人生走错了方向，重来吧");    }