public class CrashHandler implements ReportSender {
  @Override
  public void send(Context context, CrashReportData errorContent) throws ReportSenderException {
    Timber.i("閃退,檢查是否需要清空數(shù)據(jù)");
    new CrashModel().checkAndClearData();
  }
}

public class CrashModel {

  private static final String KEY_CRASH_TIMES = "crash_times";
  private static final String CRASH_TIME_FILE_NAME = "crash_time";
  //不能通過App.getPackageName來獲取包名，否則會有問題，只能默認(rèn)為cn.campusapp.campus。所以對于debug或者運營版本，清數(shù)據(jù)會把release的清掉
  private static final String FILE_DIR = String.format("/data/data/%s/", BuildConfig.APPLICATION_ID);
  private static final String ACCOUNT_FILE_NAME = String.format("%s%s", FILE_DIR, "shared_prefs/account_pref.xml");
  private static ArrayList<String> FILES_DONTNEED_DELETE = new ArrayList<>(); //該目錄中的文件不會被刪除

  static {
    FILES_DONTNEED_DELETE.add(ACCOUNT_FILE_NAME); //目前賬號信息文件不會被刪除，但是會手動改變數(shù)據(jù)，只保留userId accessToken 和school
  }

  protected ArrayList<Long> mCrashTimes;
  Gson gson = new Gson();
  private File mFileDir;

  public CrashModel() {
    mFileDir = new File(FILE_DIR);
    mCrashTimes = readCrashTimes();
    if (mCrashTimes == null) {
      mCrashTimes = new ArrayList<>();
      storeCrashTimes(mCrashTimes);
    }
  }


  public void checkAndClearData() {
    long timeNow = System.currentTimeMillis();

    if (checkClearData(timeNow, new ArrayList<>(mCrashTimes))) {
      Timber.i("已經(jīng)在5分鐘之內(nèi)有三次閃退，需要清理數(shù)據(jù)");
      try {
        clearData();
      } catch (Exception e) {
        Timber.e(e, "清空所有數(shù)據(jù)失敗");
      }
    } else {
      mCrashTimes.add(timeNow);
      storeCrashTimes(mCrashTimes);
      Timber.i("此次不需要清空數(shù)據(jù), %s", gson.toJson(mCrashTimes));
    }
  }

  private void storeCrashTimes(ArrayList<Long> crashTimes) {
    try {
      String str = gson.toJson(crashTimes);
      Files.writeToFile(mFileDir, CRASH_TIME_FILE_NAME, str);
    } catch (Exception e) {
      Timber.e(e, "保存閃退時間失敗");
    }

  }

  private ArrayList<Long> readCrashTimes() {
    try {
      String timeStr = Files.readFileContent(mFileDir, CRASH_TIME_FILE_NAME);
      return gson.fromJson(timeStr, new TypeToken<ArrayList<Long>>() {
      }.getType());
    } catch (Exception e) {
      Timber.e(e, "讀取閃退時間失敗");
    }
    return null;
  }

  /**
   * 檢查是否需要清空數(shù)據(jù)，目前的清空策略是在5分鐘之內(nèi)有三次閃退的就清空數(shù)據(jù)，也就是從后往前遍歷，只要前兩次閃退發(fā)生在5分鐘之內(nèi)，就清空數(shù)據(jù)
   *
   * @return
   */
  private boolean checkClearData(long time, ArrayList<Long> crashTimes) {
    Timber.i(gson.toJson(crashTimes));
    int count = 0;
    for (int i = crashTimes.size() - 1; i >= 0; i--) {
      long crashTime = crashTimes.get(i);
      if (time - crashTime <= 5 * 60 * 1000) {
        count++;
        if (count >= 2) {
          break;
        }
      }
    }
    if (count >= 2) {
      //在5分鐘之內(nèi)有三次閃退，這時候需要清空數(shù)據(jù)
      return true;
    } else {
      return false;
    }
  }

  /**
   * 清空數(shù)據(jù)，包括數(shù)據(jù)庫中的和SharedPreferences中的
   *
   * @throws Exception
   */
  private void clearData() throws Exception {
    Timber.i("開始清理數(shù)據(jù)");
    Files.deleteFilesExceptSomeInDirectory(mFileDir, FILES_DONTNEED_DELETE);
  }


}

@ReportsCrashes(
  //一些ACRA的設(shè)置，具體參考ACRA文檔，因為我們使用自定義Sender，所以這里完全可以不用設(shè)置
    //mailTo = "bugs@treeholeapp.cn",
    //mode = ReportingInteractionMode.TOAST,
    //resToastText = R.string.crash_toast_text
)
public class App extends Application {

  @Override
  public void onCreate() {
   if (!BuildConfig.DEBUG) { //這里我判斷只有在非DEBUG下才清除數(shù)據(jù)，主要是為了在開發(fā)過程中能夠保留線程。
        ACRA.init(APPLICATION_CONTEXT);
        CrashHandler handler = new CrashHandler();
        ACRA.getErrorReporter().setReportSender(handler); //在閃退時檢查是否要清空數(shù)據(jù)
    }

  }
}