How to Control Screen Brightness Level in Android App Using Android Studio in Java Full Project For Beginners

 

 

package com.example.mybrightnesscontrol;

import androidx.appcompat.app.AppCompatActivity;
import android.content.ContentResolver;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Settings;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {
private EditText editText;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

if(!Settings.System.canWrite(this)){
Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS);
intent.setData(Uri.parse(“package:” + this.getPackageName()));
startActivity(intent);
}
editText = findViewById(R.id.editText);
}

public void setButton(View view){
ContentResolver contentResolver = this.getApplicationContext().getContentResolver();
Settings.System.putInt(contentResolver, Settings.System.SCREEN_BRIGHTNESS, Integer.parseInt(editText.getText().toString()));
}
}

 

 

 

<?xml version=”1.0″ encoding=”utf-8″?>
<manifest xmlns:android=”http://schemas.android.com/apk/res/android”
package=”com.example.mybrightnesscontrol”>

<uses-permission android:name=”android.permission.WRITE_SETTINGS”/>

<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>

 

 

 

<?xml version=”1.0″ encoding=”utf-8″?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android=”http://schemas.android.com/apk/res/android”
xmlns:app=”http://schemas.android.com/apk/res-auto”
xmlns:tools=”http://schemas.android.com/tools”
android:layout_width=”match_parent”
android:layout_height=”match_parent”
tools:context=”.MainActivity”>

<EditText
android:id=”@+id/editText”
android:layout_width=”wrap_content”
android:layout_height=”wrap_content”
android:layout_marginStart=”108dp”
android:layout_marginTop=”99dp”
android:layout_marginEnd=”90dp”
android:layout_marginBottom=”301dp”
android:ems=”10″
android:hint=”@string/enter_the_brightness_level”
android:inputType=”textPersonName”
app:layout_constraintBottom_toBottomOf=”parent”
app:layout_constraintEnd_toEndOf=”parent”
app:layout_constraintStart_toStartOf=”parent”
app:layout_constraintTop_toBottomOf=”@+id/button”
android:autofillHints=”” />

<Button
android:id=”@+id/button”
android:layout_width=”wrap_content”
android:layout_height=”wrap_content”
android:layout_marginStart=”158dp”
android:layout_marginTop=”239dp”
android:layout_marginEnd=”165dp”
android:layout_marginBottom=”98dp”
android:onClick=”setButton”
android:text=”@string/set”
app:layout_constraintBottom_toTopOf=”@+id/editText”
app:layout_constraintEnd_toEndOf=”parent”
app:layout_constraintStart_toStartOf=”parent”
app:layout_constraintTop_toTopOf=”parent” />

</androidx.constraintlayout.widget.ConstraintLayout>

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