BrightnessTest

A minimal legacy Android sample app (circa 2017) that demonstrates how to control screen brightness programmatically. It is a stock Android Studio "Basic Activity" template with a small brightness experiment added to MainActivity.

What It Does

On launch, MainActivity:

1. Writes the system-wide brightness setting to its maximum value (255) via Settings.System.putInt(..., SCREEN_BRIGHTNESS, ...) — this requires the WRITE_SETTINGS permission declared in the manifest.
2. Sets the current window's brightness to maximum through WindowManager.LayoutParams.screenBrightness.

The rest of the app (toolbar, FAB with a placeholder Snackbar, options menu, "Hello World!" layout) is unmodified template code.

Requirements

• Built against compileSdkVersion 23 / buildToolsVersion 23.0.1
• Android Gradle Plugin 1.3.0, Android Support Library 23.1.0 (appcompat-v7, design)
• minSdkVersion 10, targetSdkVersion 23

These toolchain versions are from the 2015–2017 era and will not build with a modern Android Studio setup without migration (AndroidX, current AGP, Maven Central instead of JCenter).

Project Structure

app/src/main/java/com/zyxw/myapplication/MainActivity.java  # Brightness logic
app/src/main/AndroidManifest.xml                            # WRITE_SETTINGS permission
app/src/main/res/                                           # Template layouts and resources

Status

This repository is a one-off test/sample and is not maintained. Note that on Android 6.0+ (API 23), writing Settings.System requires the user to grant the WRITE_SETTINGS special permission via Settings.ACTION_MANAGE_WRITE_SETTINGS, which this sample does not handle.