Flash Light Example

                     

                       Android Flash Light Example

1. The Application First Step Create a New Project Start project

2. Rename Application Name Ex: Flash Light Below Screen
Click Next

3. After Spacific Minium sdk API 23 Select Lolipop 5.0
Click Next

4. Final Select Blank Activity And
Click Next

5. Then Select MainActivity Click Finish

Note:  Flash Light Application is Your Android Device hardwear of Flash

suppose from Not sure support any device

1. MainActivity.Java

  
package com.example.flash;

import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.WindowManager;
import android.widget.ImageBut

public class MainActivity extends ActionBarActivity {

    private ImageButton flashLight;
    private Camera camera;
    private Parameters parameter;
    private boolean deviceHasFlash;
    private boolean isFlashLightOn = false;
   

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


        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

        flashLight = (ImageButton)findViewById(R.id.flash_light);
        deviceHasFlash = getApplication().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
        if(!deviceHasFlash){
            Toast.makeText(MainActivity.this, "Sorry, you device does not have any camera", Toast.LENGTH_LONG).show();
            return;
        }
        else{
            this.camera = Camera.open(0);
            parameter = this.camera.getParameters();
        }

        flashLight.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(!isFlashLightOn){
                    turnOnTheFlash();
                }else{
                    turnOffTheFlash();
                }
            }
        });
    }

    private void turnOffTheFlash() {
        parameter.setFlashMode(Parameters.FLASH_MODE_OFF);
        this.camera.setParameters(parameter);
        this.camera.stopPreview();
        isFlashLightOn = false;
        flashLight.setImageResource(R.drawable.buttonoff);
    }

    private void turnOnTheFlash() {
        if(this.camera != null){
            parameter = this.camera.getParameters();
            parameter.setFlashMode(Parameters.FLASH_MODE_TORCH);
            this.camera.setParameters(parameter);
            this.camera.startPreview();
            isFlashLightOn = true;
            flashLight.setImageResource(R.drawable.buttonon);
        }
    }

    private void getCamera() {
        if (camera == null) {
            try {
                camera = Camera.open();
                parameter = camera.getParameters();
            } catch (RuntimeException e) {
                System.out.println("Error: Failed to Open: " + e.getMessage());
            }
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    protected void onStop() {
        super.onStop();
        if(this.camera != null){
            this.camera.release();
            this.camera = null;
        }
    }
    @Override
    protected void onPause() {
        super.onPause();
        turnOffTheFlash();
    }
    @Override
    protected void onResume() {
        super.onResume();
        if(deviceHasFlash){
            turnOffTheFlash();
        }
    }

    @Override
    protected void onStart() {
        super.onStart();
        getCamera();
  }

2.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:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="taskreminderapp.techsect.com.techlock.MainActivity">


      
      <ImageButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/flash_light"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:src="@drawable/buttonoff"
        android:background="@android:color/transparent"
        android:contentDescription="@null"
        android:layout_marginTop="140dp"/>
  
  
 </RelativeLayout>

3.Activity Mainifests.xml

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

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.flash" />


  <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      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>
     

4.save images of drawable folder

5.String.xml

<resources>
   <string name="app_name">Spaceo FlashLight</string>
   <string name="hello_world">Hello world!</string>
   <string name="menu_settings">Settings</string>
   <string name="title_activity_main">MainActivity</string>
</resources>

6.Output

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