How to set screen brightness inside android application locally

Question

I want to set the brightness of my android application only and not my phone. How do I change the brightness of my android application such that it does not effect my mobile phone brightness?

You have to reset the brightness settings in onPause of your activity and apply again in onResume — Nadeem Iqbal, Sep 26 '14 at 11:06
I didn't understand, you are trying to **only** change your app brightness? — Lazy, Sep 26 '14 at 11:13
@Lazy: I have this feature in my camera application, because not all android devices have light sensors and during daytime outdoor photography one might need full-brightness while taking pictures. — Sagar Pilkhwal, Sep 26 '14 at 11:17
@Lazy : Yes, I want only change(adjust) my app brightness not my mobile. — Janak, Sep 26 '14 at 11:19
@janak: You mean change the phone's brightness when your app is running. :) — Sagar Pilkhwal, Sep 26 '14 at 11:19
@SagarPilkhwal : No. dont change phone brightness. only change Application brightness. Without any permission. — Janak, Sep 26 '14 at 11:22

score 7 · Accepted Answer · answered Sep 26 '14 at 11:25

7

No need to give any permission only set Following Params in your Seekbar's Method

public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
      // TODO Auto-generated method stub
      float BackLightValue = (float)arg1/100;
      BackLightSetting.setText(String.valueOf(BackLightValue)); // BackLignt is Textview to display value

      WindowManager.LayoutParams layoutParams = getWindow().getAttributes(); // Get Params
      layoutParams.screenBrightness = BackLightValue; // Set Value
      getWindow().setAttributes(layoutParams); // Set params


     }

answered Sep 26 '14 at 11:25

SANU

192
1
8

when I close application and open again brightness is 0 or what ever I change is there. – Janak Sep 26 '14 at 11:27
Its always Start by given Default not 0 and if u want to start it by system then get System's Brightness and set to params int systemvalue= android.provider.Settings.System.getInt(getContentResolver(), android.provider.Settings.System.SCREEN_BRIGHTNESS); – SANU Sep 26 '14 at 11:29
The code @SANU provided is Plagiarised from [http://android-er.blogspot.in/2011/02/change-system-screen-brightness-using.html](http://android-er.blogspot.in/2011/02/change-system-screen-brightness-using.html) and its manifest clearly has `` – Sagar Pilkhwal Sep 26 '14 at 11:44
@SANU: why do you think there is no permission required? Like android will just let you change the device's brightness? – Sagar Pilkhwal Sep 26 '14 at 11:45
1

@SagarPilkhwal If we want to change Whole System's brightness then we required permission otherwise not ...and this code is work for me – SANU Sep 29 '14 at 07:05

score 2 · Answer 2 · edited May 23 '17 at 10:26

Get and Save the current brightness of your device, then change the brightness of the device(when your app starts running), and when your application closes revert back to the original brightness using the saved brightness level.

To Get Screen Brightness Level:

int curBrightnessValue = android.provider.Settings.System.getInt(getContentResolver(), android.provider.Settings.System.SCREEN_BRIGHTNESS);

To Set Screen Brightness Level:

android.provider.Settings.System.putInt(getContext().getContentResolver(),
android.provider.Settings.System.SCREEN_BRIGHTNESS, value); //<-- 1-225

App manifest permissions:

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

or

WindowManager.LayoutParams layoutParams = getWindow().getAttributes();
layoutParams.screenBrightness = curBrightnessValue/100.0f; //<-- your value here
getWindow().setAttributes(layoutParams);

here is a tutorial link

Another SO Post Link

P.S: you will have to handle all events like onPause(), onResume(), onBackPressed() etc

How to set screen brightness inside android application locally

2 Answers2