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Android Kotlinmobile~10 mins

Android SDK and API levels in Android Kotlin - UI Render Trace

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Component - Android SDK and API levels

This UI component shows how Android SDK versions and API levels relate to app compatibility. It displays the current device API level and the minimum SDK version required by the app. This helps developers understand if their app can run on the device.

Widget Tree
LinearLayout (vertical)
├─ TextView (App Title)
├─ TextView (Device API Level)
├─ TextView (App Min SDK)
└─ Button (Check Compatibility)
A vertical layout with a title at the top, followed by two text lines showing device API level and app minimum SDK version, and a button at the bottom to check compatibility.
Render Trace - 5 Steps
Step 1: LinearLayout
Step 2: TextView (App Title)
Step 3: TextView (Device API Level)
Step 4: TextView (App Min SDK)
Step 5: Button (Check Compatibility)
State Change - Re-render
Trigger:User taps the 'Check Compatibility' button
Before
No compatibility message shown
After
A Toast message appears: 'Compatible: Yes' or 'Compatible: No' depending on API levels
Re-renders:Only the Toast message appears; main UI remains unchanged
UI Quiz - 3 Questions
Test your understanding
What does the 'Device API Level' text show?
AThe API level of the device's Android system
BThe Android version number of the device
CThe minimum SDK version the app supports
DThe maximum SDK version the app supports
Key Insight
Using clear labels and a simple vertical layout helps users quickly understand device compatibility with the app. Showing both device API level and app minimum SDK side by side makes the concept tangible and easy to grasp.