android 捕捉異常并上傳至服務器的簡單實現(xiàn)

更新時間：2017年04月18日 10:05:33 作者：紋羽卿

本篇文章主要介紹了android 捕捉異常并上傳至服務器的簡單實現(xiàn)，具有一定的參考價值，有興趣的可以了解一下。

在項目中，我們的應用經(jīng)常會遇到崩潰的情況，如果你的項目已經(jīng)發(fā)送到了應用市場上，那么應用發(fā)生的崩潰開發(fā)人員是開不到的，所以我們要想辦法將異常信息傳到服務器上，便于開發(fā)人員查看并作出修改。Google考慮到這一點，也提供了Thread.UncaughtExceptionHandler接口來實現(xiàn)這一問題。

創(chuàng)建Crash異常捕獲很簡單，主要的步驟有：

1.創(chuàng)建BaseApplication繼承Application并實現(xiàn)Thread.UncaughtExceptionHandler

2.通過Thread.setDefaultUncaughtExceptionHandler(this)設置默認的異常捕獲

3.最后在manifests中注冊創(chuàng)建的BaseApplication

一、異常捕捉的簡單實用

public class BaseApplication extends Application implements Thread.UncaughtExceptionHandler {

  @Override
  public void onCreate() {
    super.onCreate();
    //設置異常捕獲
    CrashHandler catchHandler = CrashHandler.getInstance();
    catchHandler.init(this);
  }
}

二、CrashHandler（主要是實現(xiàn)uncaughtException方法）

public class CrashHandler implements UncaughtExceptionHandler {

  public static final String TAG = "CrashHandler";

  // 系統(tǒng)默認的UncaughtException處理類
  private Thread.UncaughtExceptionHandler mDefaultHandler;
  // CrashHandler實例
  private static CrashHandler instance;
  // 程序的Context對象
  private Context mContext;
  // 用來存儲設備信息和異常信息
  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");
  MyActivityLifecycleCallbacks mMyActivityLifecycleCallbacks = new MyActivityLifecycleCallbacks();

  /** 保證只有一個CrashHandler實例 */
  private CrashHandler() {
  }

  /** 獲取CrashHandler實例 ,單例模式 */
  public static CrashHandler getInstance() {
    if (instance == null)
      instance = new CrashHandler();
    return instance;
  }

  /**
   * 初始化
   */
  public void init(SspApplication context) {
    mContext = context;
    context.registerActivityLifecycleCallbacks(mMyActivityLifecycleCallbacks);
    // 獲取系統(tǒng)默認的UncaughtException處理器
    mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
    // 設置該CrashHandler為程序的默認處理器
    Thread.setDefaultUncaughtExceptionHandler(this);
  }

  /**
   * 當UncaughtException發(fā)生時會轉(zhuǎn)入該函數(shù)來處理
   */
  @Override
  public void uncaughtException(Thread thread, Throwable ex) {
    if (!handleException(ex) && mDefaultHandler != null) {
      // 如果用戶沒有處理則讓系統(tǒng)默認的異常處理器來處理
      mDefaultHandler.uncaughtException(thread, ex);
    } else {
    //  try {
    //    Thread.sleep(3000);
    //  } catch (InterruptedException e) {
    //    Log.e(TAG, "error : ", e);
    //  }
    // 注意Thread.sleep(3000)和 SystemClock.sleep(3000)的區(qū)別
      SystemClock.sleep(3000);
      // 退出程序
      Log.i("=====killProcess======","=====killProcess======");
      mMyActivityLifecycleCallbacks.removeAllActivities();
      android.os.Process.killProcess(android.os.Process.myPid());
      System.exit(0);
    }
  }

  /**
   * 自定義錯誤處理,收集錯誤信息 發(fā)送錯誤報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.
   */
  private boolean handleException(Throwable ex) {
    Log.i("=====handleException======","=====handleException======");
    if (ex == null) {
      return false;
    }
    // 收集設備參數(shù)信息
    collectDeviceInfo(mContext);

    // 使用Toast來顯示異常信息
    new Thread() {
      @Override
      public void run() {
        Looper.prepare();
        Toast.makeText(mContext, "哎呀，出問題了，我要暫時離開了", Toast.LENGTH_SHORT).show();
        Looper.loop();
      }
    }.start();
    // 保存日志文件
    saveCatchInfo2File(ex);
    return true;
  }

  /**
   * 收集設備參數(shù)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) {
      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());
      SharedPreferences userInfo = mContext.getSharedPreferences(
          Constants.USER_SETTING_INFOS, 0);
      String loginName = userInfo.getString(Constants.USERNAME, "");
      String fileName = "crash-" + time +"-"+loginName+ ".log";
      if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
        String path = "/mnt/sdcard/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) {
      Log.e(TAG, "an error occured while writing file...", e);
    }
    return null;
  }

  /**
   * 將捕獲的導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，并未發(fā)送給后臺。
   */
  private void sendCrashLog2PM(final String fileName) {
    if (!new File(fileName).exists()) {
      Toast.makeText(mContext, "日志文件不存在！", Toast.LENGTH_SHORT).show();
      return;
    } else {  
      new Thread(new Runnable() {
        @Override
        public void run() {
          Looper.prepare();
          ArrayList<String> picList = new ArrayList<String>();
          picList.add(fileName);
          SendEventPic sFile = new SendEventPic(mContext);
          UUIDGenerator generator = new UUIDGenerator();
          String linkId = generator.generate().toString();
          SharedPreferences userInfo = mContext.getSharedPreferences(
              Constants.USER_SETTING_INFOS, 0);
          String loginName = userInfo.getString(Constants.USERNAME, "");
          String userId = userInfo.getString(Constants.USER_USERID_INFOS, "");
          boolean isproblempic = sFile.isSendSuccess(picList, linkId,
              "crash_tng", "crash_tng", loginName, userId);
          Looper.loop();
        }
      }).start();
    }
    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，所以先打出log日志。
        Log.i("info", s.toString());
      }
    } 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();
      }
    }
  }
}

三、開發(fā)過程中遇到的坑

如果在activity創(chuàng)建的時候崩潰的話，系統(tǒng)有時候（目前不確定什么情況下會重啟）會重啟當前的activity，造成第二次的崩潰，如此循環(huán)……

所以，在應用崩潰時要完全退出應用。

public class MyActivityLifecycleCallbacks implements ActivityLifecycleCallbacks {

  private List<Activity> activities = new LinkedList<>();
  public static int sAnimationId = 0;

  @Override
  public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
    addActivity(activity);
  }

  @Override
  public void onActivityStarted(Activity activity) {

  }

  @Override
  public void onActivityResumed(Activity activity) {

  }

  @Override
  public void onActivityPaused(Activity activity) {

  }

  @Override
  public void onActivityStopped(Activity activity) {

  }

  @Override
  public void onActivitySaveInstanceState(Activity activity, Bundle outState) {

  }

  @Override
  public void onActivityDestroyed(Activity activity) {
    removeActivity(activity);
  }

  /**
   * 添加Activity
   */
  public void addActivity(Activity activity) {
    if (activities == null) {
      activities = new LinkedList<>();
    }

    if (!activities.contains(activity)) {
      activities.add(activity);// 把當前Activity添加到集合中
    }
  }

  /**
   * 移除Activity
   */
  public void removeActivity(Activity activity) {
    if (activities.contains(activity)) {
      activities.remove(activity);
    }

    if (activities.size() == 0) {
      activities = null;
    }
  }

  /**
   * 銷毀所有activity
   */
  public void removeAllActivities() {
    for (Activity activity : activities) {
      if (null != activity) {
        activity.finish();
        activity.overridePendingTransition(0, sAnimationId);
      }
    }
  }
}

以上就是本文的全部內(nèi)容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。

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