
- Android Basics
- Android - Home
- Android - Overview
- Android - Environment Setup
- Android - Architecture
- Android - Application Components
- Android - Hello World Example
- Android - Resources
- Android - Activities
- Android - Services
- Android - Broadcast Receivers
- Android - Content Providers
- Android - Fragments
- Android - Intents/Filters
- Android - User Interface
- Android - UI Layouts
- Android - UI Controls
- Android - Event Handling
- Android - Styles and Themes
- Android - Custom Components
- Android Advanced Concepts
- Android - Drag and Drop
- Android - Notifications
- Location Based Services
- Android - Sending Email
- Android - Sending SMS
- Android - Phone Calls
- Publishing Android Application
- Android Useful Examples
- Android - Alert Dialoges
- Android - Animations
- Android - Audio Capture
- Android - AudioManager
- Android - Auto Complete
- Android - Best Practices
- Android - Bluetooth
- Android - Camera
- Android - Clipboard
- Android - Custom Fonts
- Android - Data Backup
- Android - Developer Tools
- Android - Emulator
- Android - Facebook Integration
- Android - Gestures
- Android - Google Maps
- Android - Image Effects
- Android - ImageSwitcher
- Android - Internal Storage
- Android - JetPlayer
- Android - JSON Parser
- Android - Linkedin Integration
- Android - Loading Spinner
- Android - Localization
- Android - Login Screen
- Android - MediaPlayer
- Android - Multitouch
- Android - Navigation
- Android - Network Connection
- Android - NFC Guide
- Android - PHP/MySQL
- Android - Progress Circle
- Android - ProgressBar
- Android - Push Notification
- Android - RenderScript
- Android - RSS Reader
- Android - Screen Cast
- Android - SDK Manager
- Android - Sensors
- Android - Session Management
- Android - Shared Preferences
- Android - SIP Protocol
- Android - Spelling Checker
- Android - SQLite Database
- Android - Support Library
- Android - Testing
- Android - Text to Speech
- Android - TextureView
- Android - Twitter Integration
- Android - UI Design
- Android - UI Patterns
- Android - UI Testing
- Android - WebView Layout
- Android - Wi-Fi
- Android - Widgets
- Android - XML Parsers
- Android Useful Resources
- Android - Questions and Answers
- Android - Useful Resources
- Android - Discussion
How to change screen brightness programmatically in android?
This example demonstrates how do I change screen brightness programmatically in android.
Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.
Step 2 − Add the following code to res/layout/activity_main.xml.
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:padding="8dp" android:gravity="center" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Turn Off Screen"/> <SeekBar android:id="@+id/seekBar" android:layout_marginTop="10dp" android:layout_width="match_parent" android:layout_height="wrap_content" /> </LinearLayout>
Step 3 − Add the following code to src/MainActivity.java
import android.content.Context; import android.provider.Settings; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.SeekBar; public class MainActivity extends AppCompatActivity { SeekBar lightBar; Context context; int brightness; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); lightBar = findViewById(R.id.seekBar); context = getApplicationContext(); brightness = Settings.System.getInt(context.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, 0); lightBar.setProgress(brightness); lightBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { Settings.System.putInt(context.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, progress); } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onStopTrackingTouch(SeekBar seekBar) { } }); } }
Step 4 − Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" package="app.com.sample"> <uses-permission android:name="android.permission.WRITE_SETTINGS" tools:ignore="ProtectedPermissions" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −
- Related Articles
- How to change screen brightness programmatically in iOS?
- How to change Screen Orientation programmatically using a Button in Android?
- How to change Screen Orientation programmatically using a Button in Android Kotlin?
- How to get screen DPI programmatically in Android?
- How to get the screen DPI programmatically in Android using Kotlin?
- How to lock screen orientation on all android devices programmatically?
- How to turn Android device screen on and off programmatically?
- How to change the app language programmatically in android?
- How to change android overflow menu icon programmatically?
- How to turn Android device screen on and off programmatically using Kotlin?
- How to make an application ignore screen orientation change in Android?
- How to lock Screen Orientation programmatically in iOS?
- How to change the Android Overflow menu icon programmatically using Kotlin?
- How to change the position of the dialog on Screen android?
- How to create directory programmatically in Android?

Advertisements