A simple exercise of Video Capture using MediaRecorder, for Android 2.3 or higher

Refer to my old exercise "A simple exercise of Video Capture using MediaRecorder" for SDK Level 8 Android 2.2. But it fail to run on Android 2.3!!! So I re-write it for SDK Level 10, Android 2.3.3. Tested on Nexus One running Android 2.3.6.



Main Code:

package com.exercise.AndroidVideoCapture;

import java.io.IOException;

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

public class AndroidVideoCapture extends Activity{

private Camera myCamera;
  private MyCameraSurfaceView myCameraSurfaceView;
  private MediaRecorder mediaRecorder;

Button myButton;
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);
  }

  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 boolean prepareMediaRecorder(){
   myCamera = getCameraInstance();
   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"/>
<Button
android:id="@+id/mybutton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="REC"
android:textSize="12dp"/>
</LinearLayout>
</LinearLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.exercise.AndroidVideoCapture"
    android:versionCode="1"
    android:versionName="1.0">
  <uses-sdk android:minSdkVersion="10" />
  <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>
  <uses-permission android:name="android.permission.CAMERA"></uses-permission>
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
  <application android:icon="@drawable/icon" android:label="@string/app_name">
      <activity android:name=".AndroidVideoCapture"
                android:label="@string/app_name"
                android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
                android:screenOrientation="landscape">
          <intent-filter>
              <action android:name="android.intent.action.MAIN" />
              <category android:name="android.intent.category.LAUNCHER" />
          </intent-filter>
      </activity>

  </application>
</manifest>

Download the files.

next:
- Video Capture using MediaRecorder with Flash Light

Reference:
- Android Dev Guide: Camera