Android Video Capture Tutorial

Tutorial for Capture video in android device.

AndroidVideoCapture.java

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"
    >
    <RelativeLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        >
        <FrameLayout
            android:id="@+id/videoview"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"/>
        <Button
            android:id="@+id/mybutton"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_centerHorizontal="true"
            android:layout_alignParentBottom="true"
            android:text="REC"
            android:textSize="12dp"/>
    </RelativeLayout>
</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> 

 

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