Android İçin El Feneri Yapma

import android.R.layout;

import android.graphics.drawable.Drawable;

import android.hardware.Camera;

import android.hardware.Camera.Parameters;

import android.media.MediaPlayer;

import android.os.Bundle;

import android.app.Activity;

import android.content.pm.PackageManager;

import android.content.res.Resources;

import android.view.Menu;

import android.view.View;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.RelativeLayout;

import android.widget.Toast;

protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        light.setOnClickListener(new View.OnClickListener() {    

            @Override

            public void onClick(View v) {

                if(a==0){

        

                    isikac();

                    

                }

                else if(a==1){

                    

                    isikkapat();

                }

            }

        });

    }

int a=0;

    Camera cam = null;

     public void isikkapat() {

        try {

            sescal();

            if (getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)) {

                cam.stopPreview();

                cam.release();

                cam = null;    

                a = 0;

            }

        } catch (Exception e) {

            e.printStackTrace();

            Toast.makeText("Işığı kapatırken problem oluştu", Toast.LENGTH_SHORT).show();

        }

    }

    public void isikac() {

        ImageView arka = (ImageView)findViewById(R.id.imageView2); 

        try {

            arka.setImageResource(R.raw.shine);

            sescal();

            if (getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)) {

                cam = Camera.open();

                cam.cancelAutoFocus();

                Parameters p = cam.getParameters();

                p.setFlashMode(Parameters.FLASH_MODE_TORCH);

                cam.setParameters(p);

                cam.startPreview();

                a=1;

             

            }

        } catch (Exception e) {

            e.printStackTrace();

            Toast.makeText("Işığı açarken problem oluştu.", Toast.LENGTH_SHORT).show();

        }

    }