Jideos App Lifecycle Events

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Questions and Answers

Which LifeCycle method is called when an application transitions to the foreground?

  • `onDestroy`
  • `onActivityStopped`
  • `onRestart`
  • `onActivityStarted` (correct)

What is the significance of level=20 in the application logs?

  • Indicates the application resides in the LRU cache at level 20.
  • Represents the application being in the background, with all UI invisible. (correct)
  • Denotes that the application is running with limited system resources.
  • Specifies the minimum API level supported by the application.

When does the system typically execute the onActivityStopped lifecycle method?

  • When the activity is first created.
  • When the user rotates the device.
  • When the activity is no longer visible, such as when the user presses the Home button. (correct)
  • When the activity is brought back to the foreground.

In the context of UI-related resources, what action should be taken when the level is 20?

<p>Release UI-related resources to optimize memory usage. (D)</p>
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What is the likely purpose of checking isFeatureEnable for Xiaomi devices?

<p>To assess whether the device supports reporting point prediction. (C)</p>
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What does isTablet = true indicate in the logs?

<p>The application is running on a device identified as a tablet. (D)</p>
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What action is taken when the user presses the 'Home' or 'Back' key?

<p>UI-related resources are released to free up memory. (A)</p>
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What does the log entry NBFocus replaceFragment likely signify?

<p>A fragment within the UI is being replaced. (A)</p>
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What do the log entries related to NBFocus 焦点改变 indicate?

<p>Events related to changes in UI focus. (D)</p>
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What is the primary purpose of checking isExceSwitch = false and isTabletUI = true?

<p>Determine which layout configuration to load based on the device. (B)</p>
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Which activity lifecycle method is directly related to the application becoming visible to the user?

<p><code>onResume</code> (D)</p>
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What does the sequence BaseActivity.onRestart --> NoteDetailActivity.onSwitchPadPhoneUI --> BaseActivity.onResume suggest about an application's navigation?

<p>The user is navigating back to a previously opened screen. (D)</p>
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What can be inferred from repeated log entries showing isFeatureEnable checks?

<p>The application is periodically verifying device capabilities for a specific feature. (B)</p>
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What does the presence of onDestroy, hashCode= 83266395 followed by NoteDetailActivity in the logs indicate?

<p>The NoteDetailActivity is being destroyed. (B)</p>
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What does level=40,该程序位于LRU 缓存 列表的头部位置,不太可能被清理掉的 (level=40, This program is located at the head position of the LRU cache list, and it is unlikely to be cleared) suggest about process priority?

<p>This process is running at high priority and is unlikely to be killed by the OS. (A)</p>
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Based on the lifecycle event logs (e.g., onActivityStopped,onActivityStarted, etc), what UI change caused these calls?

<p>User pressing a button to navigate to another activity of switching apps. (D)</p>
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Based on available extracted logs, how likely is the Application to support different user interface on Tablet vs phone?

<p>Likely since <code>isTablet</code> variable is checked frequently during the log. (D)</p>
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What do the log events related to isExceSwitch represent?

<p>Device specific UI switching. (D)</p>
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The system calls onActivityStopped activity life cycle when the activity:

<p>Is no longer visible. (C)</p>
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When does the system release some UI related resources to free up memory?

<p>Pressing back key or Home key. (C)</p>
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Based on the OCR data, what's true about isFeatureEnable?

<p>It checks if a Xiaomi device supports reporting point prediction. (A)</p>
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Which of the following event is most likely to cause a transition into level=5 states?

<p>Thread running in the background. (D)</p>
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Which activity state represents running processes while having tight memory conditions?

<p>level =5 (D)</p>
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What can you infer from the statement lists will not get destroyed?

<p>The location of the header of the list. (A)</p>
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A screen rotation does what to the UI?

<p>Change system. (B)</p>
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What is the best way to maintain code quality?

<p>To release UI related resources to free up memory. (A)</p>
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The log mentions Home key or Back key, what do they do?

<p>Release UI. (A)</p>
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When do all UI components will not be visable?

<p>level=20. (C)</p>
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What is the function of isHadSwitched?

<p>Determine UI. (B)</p>
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What does NBFocus do?

<p>Changes fragment. (C)</p>
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What function does replaceFragment have

<p>Change fragment to another. (D)</p>
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What does Hash Code do?

<p>Identifies the object. (A)</p>
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When does onActivityStarted activity begin when.

<p>Application visible. (D)</p>
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Based on the OCR data what is important?

<p>isFeatureEnable (B)</p>
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What is the use isTablet.

<p>Checking running device. (B)</p>
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BaseActivity is the foundation for several of the activities. What happens with it.

<p>Restart to original. (B)</p>
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Flashcards

onActivityStarted

Occurs when an application comes to the foreground.

BaseActivity.onResume

Occurs when the application becomes visible on screen.

onActivityStopped

Occurs when the application's UI is no longer visible.

NoteDetailActivity onDestroy

Occurs before an activity is destroyed.

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BaseActivity.onRestart

Called when the app restarts after being stopped.

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isFeatureEnable

Determines if the application supports reporting.

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replaceFragment

Used for changing application views during the activity.

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BaseActivity.onCreate

Method called to create the activity.

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Study Notes

  • The log data provides information related to the execution and state changes of a Jideos application, specifically focusing on UI activities, tablet mode, Xiaomi device feature support, and lifecycle events.

Activity Lifecycle and State

  • onRestart indicates an activity is being brought back to the foreground.
  • onActivityStarted signals the start of an activity, indicating it's moving to the foreground.
  • onResume shows the activity is now in the foreground and interactive.
  • onActivityStopped shows the activity is no longer visible, typically moved to the background.
  • onDestroy indicates an activity instance is being destroyed and UI-related resources should be released
  • UI-related resources are generally released when the user presses the Home or Back key.
  • The log level "level=20" means that all UI interfaces are invisible.
  • The log level "level=40" indicates the program is located in the LRU cache.
  • "level=5, 进程前台或可见, 正常运行,但内存有些吃紧" indicates the process is in the foreground or visible, running normally, but memory usage is tight.

Tablet Mode and UI Switching

  • isTablet = true indicates the application is in tablet mode.
  • isHadSwitched indicates the the switch has been made
  • NoteDetailActivity.onSwitchPadPhoneUI 2: isExceSwitch = false, isTabletUI = true indicates UI is switching between phone and pad mode.

Xiaomi Feature Support

  • isFeatureEnable logs indicate whether Xiaomi devices support specific point prediction features.
  • A value of "false" indicates that the feature is not supported on Xiaomi devices, specifically the the point prediction feature.

UI Focus

  • NBFocus replaceFragment indicates replacing the fragment.
  • NBFocus 焦点改变 signals a focus change in the UI.
  • NBFocus 焦点改变:3 specifies a particular focus change event, potentially involving a component marked as "3".

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