FlashLight Example

Screenshots :

activity_main.xml :

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity">

    <ToggleButton

        android:layout_width="100dp"

        android:layout_height="100dp"

        android:textSize="20dp"

        android:text="New ToggleButton"

        android:id="@+id/toggleButton"

        android:textColor="#ffffff"

        android:background="#057CA6"

        android:layout_centerVertical="true"

        android:layout_centerHorizontal="true" />

</RelativeLayout>

colors.xml :

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <color name="colorPrimary">#047AA0</color>

    <color name="colorPrimaryDark">#03597A</color>

    <color name="colorAccent">#FF4081</color>

    <color name="red">#FF5500</color>

    <color name="white">#FFffff</color>

</resources>

MainActivity.java :

package com.chantisandroid.flashlight;

import android.content.Intent;

import android.hardware.Camera;

import android.hardware.Camera.Parameters;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.widget.CompoundButton;

import android.widget.Toast;

import android.widget.ToggleButton;

public class MainActivity extends AppCompatActivity implements CompoundButton.OnCheckedChangeListener {

    ToggleButton toggleButton;

    Camera camera;

    Parameters parameters;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        toggleButton = (ToggleButton) findViewById(R.id.toggleButton);

        toggleButton.setOnCheckedChangeListener(this);

    }

    @Override

    public void onCheckedChanged(CompoundButton compoundButton, boolean b) {

        if (toggleButton.isChecked()) {

            camera = Camera.open();

            parameters = camera.getParameters();

            parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);

            camera.setParameters(parameters);

            Toast.makeText(this,"FlashLight is On",Toast.LENGTH_LONG).show();

            toggleButton.setTextColor(getResources().getColor(R.color.red));

        } else {

            parameters.setFlashMode(Parameters.FLASH_MODE_OFF);

            camera.setParameters(parameters);

            camera.release();

            camera = null;

            Toast.makeText(this, "FlashLight is Off", Toast.LENGTH_LONG).show();

            toggleButton.setTextColor(getResources().getColor(R.color.white));

        }

    }

    @Override

    public void onBackPressed() {

        Intent intent = new Intent(Intent.ACTION_MAIN);

        intent.addCategory(Intent.CATEGORY_HOME);

        startActivity(intent);

    }

}