Application Lifecycle and Note Management

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Questions and Answers

What indicates that the application is likely not to be cleaned up from memory?

  • The application has fewer than 5 processes running.
  • User information is set to true.
  • The application has been recently opened.
  • It has a level of 40 in the LRU cache. (correct)

What percentage of dirty notes were recorded at the time of processing?

  • 50%
  • 75%
  • 0% (correct)
  • 100%

What does the log message about 'DirtyStrokeHandler' imply?

  • The application has run out of storage.
  • All dirty notes have been successfully processed. (correct)
  • There are unresolved notes that need to be imported.
  • The user has deleted all imported notes.

Which of the following statements regarding the UpgradeManager is true?

<p>It initiates the app on first install. (C)</p> Signup and view all the answers

What is indicated by the 'IS_FIRST_PRIVACY' message being true?

<p>The application is in its initial setup phase. (D)</p> Signup and view all the answers

What does the log message 'BaseActivity.onCreate: isTablet = true' indicate?

<p>The app is currently running on a tablet device. (A)</p> Signup and view all the answers

What does the 'pdf初始化成功version:9.0.0.1127' log message mean?

<p>The PDF was successfully initialized with the specified version. (A)</p> Signup and view all the answers

What is referenced when the log shows 'getExternalFilesDirs' followed by a specific file path?

<p>The location for external storage for app data. (B)</p> Signup and view all the answers

What does '脏笔记数量:0' suggest about the application state?

<p>All notes have been processed successfully. (C)</p> Signup and view all the answers

What could the 'mmkv init' message signify?

<p>The memory key-value storage has been initialized. (C)</p> Signup and view all the answers

During which lifecycle method does the hashCode indicate the creation of the SubscribeVipActivity?

<p>onCreate (A)</p> Signup and view all the answers

The message '查询所有耗时:0' implies what about the query processing time?

<p>The query was executed without any delays. (D)</p> Signup and view all the answers

What does the term '反射获取失败,走遍历查询' imply?

<p>Reflection access failed, and alternative querying will be performed. (B)</p> Signup and view all the answers

What does the message '未导入完笔记处理完' suggest?

<p>There are still notes pending import processing. (A)</p> Signup and view all the answers

Why might 'user_info:false' be significant in the log?

<p>No user data has been entered yet. (D)</p> Signup and view all the answers

Which of the following activities does not display as a tablet in the log?

<p>PhoneNoteListActivity (C)</p> Signup and view all the answers

What is indicated by the log entry labeled '全部笔画数量'?

<p>Total stroke count (C)</p> Signup and view all the answers

What can be inferred about the app's lifecycle state in the log entries?

<p>The application is currently in the foreground and not likely to be cleared. (B)</p> Signup and view all the answers

What does the log entry 'mmkv init' likely refer to?

<p>Initialization of memory management key-value storage. (C)</p> Signup and view all the answers

In the logs, what does '脏笔记处理完' translate to in English?

<p>Dirty notes processing completed (B)</p> Signup and view all the answers

Which of the following is indicated by the entry '查询所有耗时'?

<p>Time taken for all queries (A)</p> Signup and view all the answers

What does the log entry '反射获取失败,走遍历查询' imply?

<p>Reflection retrieval has failed, leading to a fallback to traversal queries. (D)</p> Signup and view all the answers

What does the log entry indicating 'version: 9.0.0.1127' likely refer to?

<p>Version number of the PDF initialization (D)</p> Signup and view all the answers

What does '未升级笔画数量' indicate?

<p>Number of strokes that have not been upgraded (B)</p> Signup and view all the answers

Flashcards

MMKV init

The process of initializing the MMKV library for storing app data.

user_info:false

A check to see if the user's profile information is already stored.

IS_FIRST_PRIVACY:true

Indicates whether this is the first time the user is being asked to interact with privacy settings.

userToken:false

A check to see if the user's authentication token is available.

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pdf初始化成功version:9.0.0.1127

The process of setting up and initializing the PDF library for viewing and interacting with documents.

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getReflectRootInPath

A method to fetch the root directory for storage.

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getExternalFilesDirs

The process of identifying where to store files on the user's device.

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Thread:653未导入完笔记处理完

A process of handling notes that haven't been completely imported yet, ensuring they are processed.

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Thread:970未导入完笔记处理完

The process of handling notes that haven't been fully imported to ensure they are processed and ready for use.

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isTablet

The process of determining if a device is a tablet or a phone. Devices with larger screens are typically considered tablets.

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BaseActivity.onCreate

The process of loading and setting up a class, often used for user interfaces, to be ready for use.

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BaseActivity.onResume

The process of updating the state of a class when it becomes active, often used for data updates or user interactions.

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UpgradeManager

The process of upgrading notes to a newer version, ensuring compatibility and feature updates.

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DirtyStrokeHandler

A process of finding and applying changes to notes that need to be updated or fixed, ensuring consistent data across devices.

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StorageUtils.getVolume

A process of identifying and removing the most recent versions of notes, ensuring consistent data across devices.

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What does "Dirty Stroke Handler" do?

The process of checking and updating notes that haven't been fully imported into the app.

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What does "LifeCycle" do?

A system that monitors and manages the app's lifecycle, ensuring it runs smoothly and efficiently.

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What does "StrokeUpgradeHandler" do?

The component responsible for handling and upgrading strokes (like handwriting) in the app.

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What is the purpose of "预处理笔画数"?

This process calculates and compares the number of strokes in notes before and after upgrades. It helps identify any inconsistencies or issues.

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What is "MMkvSPUtils"?

A feature that stores and manages application settings and user data, providing a quick and efficient method for access.

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What is "PDF" used for in the app?

Used to initialize and manage the PDF library, allowing users to interact with and view PDF documents within the app.

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What does "getReflectRootInPath" do?

The method checks if a file is already stored using reflection. If not, it then searches for the file using a directory traversal method.

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What does "getExternalFilesDirs" do?

The method identifies the directory on the user's device that is suitable for storing files.

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Study Notes

Application Lifecycle Events

  • Application initialization (onCreate)
  • Maintaining user information (userInfo:false, IS_FIRST_PRIVACY:true, userToken:false)
  • Loading PDF documents (PDF pdf 初始化成功 version:9.0.0.1127) and potential reflection errors in accessing storage (StorageUtils, getReflectRootInPath: 反射获取失败)
  • Utilizing file paths (getExternalFilesDirs)
  • Managing and updating notes data
  • Optimization measures (using LRU cache and handling potential cleanup (LifeCycle level=40))
  • Handling various events and thread activity

Note Management

  • DirtyStrokeHandler threads manage note data (initial count, handling, and completion).
  • StrokeUpgradeHandler processes note updates and upgrade status.
  • UpgradeManager oversees note upgrade operations (pre-processing and counts).

Library Interactions

  • MMkvSPUtils manages key-value storage (mmkv init, user info, IS_FIRST_PRIVACY, userToken).
  • StorageUtils handles file system interactions, potentially using reflection (getReflectRootInPath).

System Activities

  • Application startup sequence, possibly across different devices based on tablet status (isTablet).

UI Interactions

  • BaseActivity and SubscribeVipActivity handling lifecycle events.
  • Operations like onResume and onCreate are observed within these activities (BaseActivity.onCreate, BaseActivity.onResume).
  • PhoneNoteListActivity manages list views and note details, demonstrating activity lifecycle and background operations.

Other Observations

  • Specific error messages or warnings related to processing or system interactions are noted.
  • LifeCycle levels provide insight into application status and related memory management.
  • Application state changes (e.g., foreground/background transitions and corresponding actions).
  • Version information(PDF version:9.0.0.1127) is documented.

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