異常類捕捉

/**
 * UncaughtException處理類,當(dāng)程序發(fā)生Uncaught異常的時候,由該類來接管程序,并記錄發(fā)送錯誤報(bào)告. 需要在Application中注冊，為了要在程序啟動器就監(jiān)控整個程序乳蛾。
 */
 
public class CrashHandler implements UncaughtExceptionHandler {
    /** TAG */
    public static final String TAG = "CrashHandler";
    /** 系統(tǒng)默認(rèn)的UncaughtException處理類 */
    private Thread.UncaughtExceptionHandler mDefaultHandler;
    /** CrashHandler實(shí)例 */
    privatestatic CrashHandler mCrashHandler;
    /** 程序的Context對象 */
    private Context mContext;
    /** 用來存儲設(shè)備信息和異常信息 */
    private Map<String, String> infos = new HashMap<String, String>();
    /** 用于格式化日期,作為日志文件名的一部分 */
    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

    /**
     * 私有構(gòu)造函數(shù)
     */private CrashHandler() {
    }

    /**
     * 獲取CrashHandler實(shí)例 ,單例模式
     * 
     * @return
     * @since V1.0
     */public static CrashHandler getInstance() {
        if (mCrashHandler == null)
            mCrashHandler = new CrashHandler();
        return mCrashHandler;
    }

    /**
     * 初始化
     * 
     * @param context
     * @since V1.0
     */public void init(Context context) {
        mContext = context;
        // 獲取系統(tǒng)默認(rèn)的UncaughtException處理器
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        // 設(shè)置該CrashHandler為程序的默認(rèn)處理器
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    /**
     * 當(dāng)UncaughtException發(fā)生時會轉(zhuǎn)入該函數(shù)來處理
     */
    @Override
    publicvoid uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {
            // 如果用戶沒有處理則讓系統(tǒng)默認(rèn)的異常處理器來處理     
            mDefaultHandler.uncaughtException(thread, ex);
        } else {
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                CLog.e(TAG, "uncaughtException() InterruptedException:" + e);
            }
            // 退出程序            
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(1);
        }
    }

    /**
     * 自定義錯誤處理,收集錯誤信息 發(fā)送錯誤報(bào)告等操作均在此完成.
     * 
     * @param ex
     * @return true:如果處理了該異常信息;否則返回false.
     * @since V1.0
     */privateboolean handleException(Throwable ex) {
        if (ex == null) {
            returnfalse;
        }

        // 收集設(shè)備參數(shù)信息        
        collectDeviceInfo(mContext);

        // 使用Toast來顯示異常信息new Thread() {
            @Override
            publicvoid run() {
                Looper.prepare();
                Toast.makeText(mContext, "很抱歉,程序出現(xiàn)異常,即將退出.",Toast.LENGTH_SHORT).show();
                Looper.loop();
            }
        }.start();
        // 保存日志文件        
        saveCatchInfo2File(ex);
        returntrue;
    }

    /**
     * 收集設(shè)備參數(shù)信息
     * 
     * @param ctx
     * @since V1.0
     */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) {
            CLog.e(TAG, "collectDeviceInfo() an error occured when collect package info NameNotFoundException:", e);
        }
        Field[] fields = Build.class.getDeclaredFields();
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                infos.put(field.getName(), field.get(null).toString());
                CLog.d(TAG, field.getName() + " : " + field.get(null));
            } catch (Exception e) {
                CLog.e(TAG, "collectDeviceInfo() an error occured when collect crash info Exception:", e);
            }
        }
    }

    /**
     * 保存錯誤信息到文件中
     * 
     * @param ex
     * @return 返回文件名稱,便于將文件傳送到服務(wù)器
     */private String saveCatchInfo2File(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 + "\n");
        }

        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 = FilePathUtil.getiVMSDirPath() + "/crash/";
                File dir = new File(path);
                if (!dir.exists()) {
                    dir.mkdirs();
                }
                FileOutputStream fos = new FileOutputStream(path + fileName);
                fos.write(sb.toString().getBytes());
                // 發(fā)送給開發(fā)人員
                sendCrashLog2PM(path + fileName);
                fos.close();
            }
            return fileName;
        } catch (Exception e) {
            CLog.e(TAG, "saveCatchInfo2File() an error occured while writing file... Exception:", e);
        }
        returnnull;
    }

    /**
     * 將捕獲的導(dǎo)致崩潰的錯誤信息發(fā)送給開發(fā)人員 目前只將log日志保存在sdcard 和輸出到LogCat中乘盖，并未發(fā)送給后臺卜朗。
     * 
     * @param fileName
     * @since V1.0
     */privatevoid sendCrashLog2PM(String fileName) {
        if (!new File(fileName).exists()) {
            CLog.e(TAG, "sendCrashLog2PM() 日志文件不存在");
            return;
        }
        FileInputStream fis = null;
        BufferedReader reader = null;
        String s = null;
        try {
            fis = new FileInputStream(fileName);
            reader = new BufferedReader(new InputStreamReader(fis, "GBK"));
            while (true) {
                s = reader.readLine();
                if (s == null)
                    break;
                // 由于目前尚未確定以何種方式發(fā)送阅虫，所以先打出log日志。                
                Log.e(TAG, s);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally { // 關(guān)閉流try {
                reader.close();
                fis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}