[안드로이드]임시로 화면 밝게 하기 안드로이드 화면 밝기 조절

//화면을 임시로 밝게 하기 위함.

package com.example.myapplication;

import android.annotation.TargetApi;
import android.content.ContentResolver;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.provider.Settings;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
    private WindowManager.LayoutParams params;
    private float brightness; 



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

        // 화면 정보
        params = getWindow().getAttributes();



       Button mcardButton = (Button)findViewById(R.id.button);
        mcardButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                changeBrightness();
            }
        });

    }

    @Override
    protected void onResume() {
        super.onResume();
     }

     protected void changeBrightness(){
         // 기존 밝기 저장

         brightness = params.screenBrightness;

         // 밝게 설정

         params.screenBrightness = 1f;

         // 밝기 설정 적용

         getWindow().setAttributes(params);
     }

    @Override
    protected void onPause() {
        super.onPause();
       
//        시스템밝기
        params.screenBrightness = brightness;

        getWindow().setAttributes(params);

    }

    
}