Android UI How to - Create a Video recorder

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The following code shows how to Create a Video recorder.

Example

Setup permission in manifest xml file

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.java2s.myapplication3.app" >
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="java2s.com"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.java2s.myapplication3.app.MainActivity"
            android:label="java2s.com" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Main layout xml file

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <Button
        android:id="@+id/button_record"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:onClick="onRecordClick" />
    
    <SurfaceView
        android:id="@+id/surface_video"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@id/button_record" />

</RelativeLayout>

Main activity Java code

package com.java2s.myapplication3.app;
//from  w w  w  . j  a v a2s.  com
import java.io.File;
import java.io.IOException;

import android.app.Activity;
import android.hardware.Camera;
import android.media.CamcorderProfile;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity implements SurfaceHolder.Callback {

    private Camera mCamera;
    private MediaRecorder mRecorder;

    private SurfaceView mPreview;
    private Button mRecordButton;

    private boolean mRecording = false;

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

        mRecordButton = (Button) findViewById(R.id.button_record);
        mRecordButton.setText("Start Recording");

        mPreview = (SurfaceView) findViewById(R.id.surface_video);
        mPreview.getHolder().addCallback(this);
        mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

        mCamera = Camera.open();
        //Rotate the preview display to match portrait
        mCamera.setDisplayOrientation(90);
        mRecorder = new MediaRecorder();
    }

    @Override
    protected void onDestroy() {
        mCamera.release();
        mCamera = null;
        super.onDestroy();
    }

    public void onRecordClick(View v) {
        updateRecordingState();
    }

    /*
     * The order of these methods are important.
     */
    private void initializeRecorder() throws IllegalStateException, IOException   {
        mCamera.unlock();
        mRecorder.setCamera(mCamera);

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

        File recordOutput = new File(Environment.getExternalStorageDirectory(), "recorded_video.mp4");
        if (recordOutput.exists()) {
            recordOutput.delete();
        }
        CamcorderProfile cpHigh = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);
        mRecorder.setProfile(cpHigh);
        mRecorder.setOutputFile(recordOutput.getAbsolutePath());

        mRecorder.setPreviewDisplay(mPreview.getHolder().getSurface());

        mRecorder.setMaxDuration(50000); // 50 seconds
        mRecorder.setMaxFileSize(5000000); // Approximately 5 megabytes

        mRecorder.prepare();
    }

    private void updateRecordingState() {
        if (mRecording) {
            mRecording = false;
            mRecorder.stop();
            mRecorder.reset();
            mCamera.lock();
            mRecordButton.setText("Start Recording");
        } else {
            try {
                initializeRecorder();
                mRecording = true;
                mRecorder.start();
                mRecordButton.setText("Stop Recording");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        try {
            mCamera.setPreviewDisplay(holder);
            mCamera.startPreview();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
                               int height) { }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) { }
}

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