Video Capture using MediaRecorder with Flash Light

During video recording using MediaRecorder, we can control the build-in flash light via Camera.setParameters().



Modify from the article "A simple exercise of Video Capture using MediaRecorder, for Android 2.3 or higher":

package com.exercise.AndroidVideoCapture;

import java.io.IOException;

import android.app.Activity;
import android.content.Context;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.media.CamcorderProfile;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.RadioButton;
import android.widget.Toast;

public class AndroidVideoCapture extends Activity{
 
 private Camera myCamera;
   private MyCameraSurfaceView myCameraSurfaceView;
   private MediaRecorder mediaRecorder;

 Button myButton;
 RadioButton flashOff, flashTorch;
 SurfaceHolder surfaceHolder;
 boolean recording;
 
   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
      
       recording = false;
      
       setContentView(R.layout.main);
      
       //Get Camera for preview
       myCamera = getCameraInstance();
       if(myCamera == null){
        Toast.makeText(AndroidVideoCapture.this,
          "Fail to get Camera",
          Toast.LENGTH_LONG).show();
       }

       myCameraSurfaceView = new MyCameraSurfaceView(this, myCamera);
       FrameLayout myCameraPreview = (FrameLayout)findViewById(R.id.videoview);
       myCameraPreview.addView(myCameraSurfaceView);
      
       myButton = (Button)findViewById(R.id.mybutton);
       myButton.setOnClickListener(myButtonOnClickListener);

       flashOff = (RadioButton)findViewById(R.id.flashoff);
       flashTorch = (RadioButton)findViewById(R.id.flashtorch);
   }
  
   Button.OnTouchListener flashButtonOnTouchListener
   = new Button.OnTouchListener(){

  @Override
  public boolean onTouch(View arg0, MotionEvent arg1) {
   // TODO Auto-generated method stub
   
   if(myCamera != null){
    Parameters parameters = myCamera.getParameters();
    
    switch (arg1.getAction()){
    case MotionEvent.ACTION_DOWN:
     parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);
     myCamera.setParameters(parameters);
     break;
    case MotionEvent.ACTION_UP:
     parameters.setFlashMode(Parameters.FLASH_MODE_OFF);
     myCamera.setParameters(parameters);
     break;
          };
   }
   
   return true;
  }};
  
 Button.OnClickListener flashModeButtonOnClickListener
 = new Button.OnClickListener(){

  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   
  }
 };
 
   Button.OnClickListener myButtonOnClickListener
   = new Button.OnClickListener(){

  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   if(recording){
               // stop recording and release camera
               mediaRecorder.stop();  // stop the recording
               releaseMediaRecorder(); // release the MediaRecorder object
              
               //Exit after saved
               finish();
   }else{
    
    //Release Camera before MediaRecorder start
    releaseCamera();
    
          if(!prepareMediaRecorder()){
           Toast.makeText(AndroidVideoCapture.this,
             "Fail in prepareMediaRecorder()!\n - Ended -",
             Toast.LENGTH_LONG).show();
           finish();
          }
    
    mediaRecorder.start();
    recording = true;
    myButton.setText("STOP");
   }
  }};
  
   private Camera getCameraInstance(){
  // TODO Auto-generated method stub
       Camera c = null;
       try {
           c = Camera.open(); // attempt to get a Camera instance
       }
       catch (Exception e){
           // Camera is not available (in use or does not exist)
       }
       return c; // returns null if camera is unavailable
 }
 
  
   private String getFlashModeSetting(){
    if(flashTorch.isChecked()){
     return Parameters.FLASH_MODE_TORCH;
    }else {
     return Parameters.FLASH_MODE_OFF;
    }
   }
  
 private boolean prepareMediaRecorder(){
     myCamera = getCameraInstance();
    
     Parameters parameters = myCamera.getParameters();
  parameters.setFlashMode(getFlashModeSetting());
  myCamera.setParameters(parameters);
    
     mediaRecorder = new MediaRecorder();

     myCamera.unlock();
     mediaRecorder.setCamera(myCamera);

     mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
     mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

     mediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));

     mediaRecorder.setOutputFile("/sdcard/myvideo.mp4");
       mediaRecorder.setMaxDuration(60000); // Set max duration 60 sec.
       mediaRecorder.setMaxFileSize(5000000); // Set max file size 5M

     mediaRecorder.setPreviewDisplay(myCameraSurfaceView.getHolder().getSurface());

     try {
         mediaRecorder.prepare();
     } catch (IllegalStateException e) {
         releaseMediaRecorder();
         return false;
     } catch (IOException e) {
         releaseMediaRecorder();
         return false;
     }
     return true;
  
 }
 
   @Override
   protected void onPause() {
       super.onPause();
       releaseMediaRecorder();       // if you are using MediaRecorder, release it first
       releaseCamera();              // release the camera immediately on pause event
   }

   private void releaseMediaRecorder(){
       if (mediaRecorder != null) {
           mediaRecorder.reset();   // clear recorder configuration
           mediaRecorder.release(); // release the recorder object
           mediaRecorder = null;
           myCamera.lock();           // lock camera for later use
       }
   }

   private void releaseCamera(){
       if (myCamera != null){
           myCamera.release();        // release the camera for other applications
           myCamera = null;
       }
   }
 
 public class MyCameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback{

  private SurfaceHolder mHolder;
     private Camera mCamera;
  
  public MyCameraSurfaceView(Context context, Camera camera) {
         super(context);
         mCamera = camera;

         // Install a SurfaceHolder.Callback so we get notified when the
         // underlying surface is created and destroyed.
         mHolder = getHolder();
         mHolder.addCallback(this);
         // deprecated setting, but required on Android versions prior to 3.0
         mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
     }

  @Override
  public void surfaceChanged(SurfaceHolder holder, int format, int weight,
    int height) {
         // If your preview can change or rotate, take care of those events here.
         // Make sure to stop the preview before resizing or reformatting it.

         if (mHolder.getSurface() == null){
           // preview surface does not exist
           return;
         }

         // stop preview before making changes
         try {
             mCamera.stopPreview();
         } catch (Exception e){
           // ignore: tried to stop a non-existent preview
         }

         // make any resize, rotate or reformatting changes here

         // start preview with new settings
         try {
             mCamera.setPreviewDisplay(mHolder);
             mCamera.startPreview();

         } catch (Exception e){
         }
  }

  @Override
  public void surfaceCreated(SurfaceHolder holder) {
   // TODO Auto-generated method stub
   // The Surface has been created, now tell the camera where to draw the preview.
         try {
             mCamera.setPreviewDisplay(holder);
             mCamera.startPreview();
         } catch (IOException e) {
         }
  }

  @Override
  public void surfaceDestroyed(SurfaceHolder holder) {
   // TODO Auto-generated method stub
   
  }
 }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   >
<LinearLayout
   android:orientation="horizontal"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   >
<FrameLayout
 android:id="@+id/videoview"
 android:layout_width="720px"
 android:layout_height="480px"/>
<LinearLayout
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent">
<Button
 android:id="@+id/mybutton"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="REC"
 android:textSize="12dp"/>
<RadioGroup
 android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:orientation="vertical">
  <RadioButton
   android:id="@+id/flashoff"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="OFF"
   android:textSize="8dp"
   android:checked="true"/>
  <RadioButton
   android:id="@+id/flashtorch"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="Torch"
   android:textSize="8dp"/>
</RadioGroup>
</LinearLayout>
</LinearLayout>
</LinearLayout>

Refer to the article "A simple exercise of Video Capture using MediaRecorder, for Android 2.3 or higher" for AndroidManifest.xml.

Download the files.