public class CrashHandler implements ReportSender {
    @Override
    public void send(Context context, CrashReportData errorContent) throws ReportSenderException {
        Timber.i("闪退,检查是否需要清空数据");
        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";
    //不能通过App.getPackageName来获取包名，否则会有问题，只能默认为cn.campusapp.campus。所以对于debug或者运营版本，清数据会把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<>();  //该目录中的文件不会被删除

    static {
        FILES_DONTNEED_DELETE.add(ACCOUNT_FILE_NAME);  //目前账号信息文件不会被删除，但是会手动改变数据，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("已经在5分钟之内有三次闪退，需要清理数据");
            try {
                clearData();
            } catch (Exception e) {
                Timber.e(e, "清空所有数据失败");
            }
        } else {
            mCrashTimes.add(timeNow);
            storeCrashTimes(mCrashTimes);
            Timber.i("此次不需要清空数据, %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, "保存闪退时间失败");
        }

    }

    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, "读取闪退时间失败");
        }
        return null;
    }

    /**
     * 检查是否需要清空数据，目前的清空策略是在5分钟之内有三次闪退的就清空数据，也就是从后往前遍历，只要前两次闪退发生在5分钟之内，就清空数据
     *
     * @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分钟之内有三次闪退，这时候需要清空数据
            return true;
        } else {
            return false;
        }
    }

    /**
     * 清空数据，包括数据库中的和SharedPreferences中的
     *
     * @throws Exception
     */
    private void clearData() throws Exception {
        Timber.i("开始清理数据");
        Files.deleteFilesExceptSomeInDirectory(mFileDir, FILES_DONTNEED_DELETE);
    }


}

@ReportsCrashes(
		  //一些ACRA的设置，具体参考ACRA文档，因为我们使用自定义Sender，所以这里完全可以不用设置
        //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) {  //这里我判断只有在非DEBUG下才清除数据，主要是为了在开发过程中能够保留线程。
                ACRA.init(APPLICATION_CONTEXT);
                CrashHandler handler = new CrashHandler();
              	ACRA.getErrorReporter().setReportSender(handler);  //在闪退时检查是否要清空数据
        }

    }
}