Android Open Source - camera Video Activity

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License

The source code is released under:

Apache License

Java Source Code

package com.marcodinacci.book.acb;
/*from  ww  w .  j  a va2s . com*/
import java.io.File;
import java.io.IOException;

import cn.bgxt.mediarecorderdemo.R;

import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.hardware.Camera;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ToggleButton;

public class VideoActivity extends Activity implements SurfaceHolder.Callback {
  private static final String VIDEO_PATH_NAME = "/mnt/emmc/DCIM/100MEDIA/test.3gp";
  private MediaRecorder mMediaRecorder;
  private Camera mCamera;
  private SurfaceView mSurfaceView;
  private SurfaceHolder mHolder;
  private View mToggleButton;
  private boolean mInitSuccesful = true;
  
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_video);
        
        // we shall take the video in landscape orientation
//        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        
        mSurfaceView = (SurfaceView) findViewById(R.id.surfaceView);
        mHolder = mSurfaceView.getHolder();
    mHolder.addCallback(this);
    mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    
    mToggleButton = (ToggleButton) findViewById(R.id.toggleRecordingButton);
    mToggleButton.setOnClickListener(new OnClickListener() {
      @Override
      // toggle video recording
      public void onClick(View v) {
        if (((ToggleButton)v).isChecked())
          mMediaRecorder.start();
        else {
//          shutdown();
          mMediaRecorder.stop();
          mMediaRecorder.reset();
          mMediaRecorder.release();
//          try {
//            initRecorder(mHolder.getSurface());
//          } catch (IOException e) {
//            e.printStackTrace();
//          }
          finish();
        }
      }
    });
    
    }

    /* Init the MediaRecorder, the order the methods are called is vital to
     * its correct functioning */
  private void initRecorder(Surface surface) throws IOException {
    // It is very important to unlock the camera before doing setCamera
    // or it will results in a black preview
    if(mCamera == null) {
      mCamera = Camera.open();
      mCamera.unlock();
    }

    if(mMediaRecorder == null)
      mMediaRecorder = new MediaRecorder();
    mMediaRecorder.setPreviewDisplay(surface);
    mMediaRecorder.setCamera(mCamera);
    
    mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
    mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
//    File file = new File(Environment.getExternalStorageDirectory(),VIDEO_PATH_NAME);
    File file = new File(VIDEO_PATH_NAME);
    // "touch" the file
    if(!file.exists()) {
      File parent = file.getParentFile();
      if(parent != null) 
        if(!parent.exists())
          if(!parent.mkdirs())
            throw new IOException("Cannot create " +
                "parent directories for file: " + file);
      
        file.createNewFile();
    }
    
    mMediaRecorder.setOutputFile(file.getAbsolutePath());
    
    // No limit. Check the space on disk!
    mMediaRecorder.setMaxDuration(-1);
    mMediaRecorder.setVideoFrameRate(15);
    
    mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
    
    try {
      mMediaRecorder.prepare();
    } catch (IllegalStateException e) {
      // This is thrown if the previous calls are not called with the 
      // proper order
      e.printStackTrace();
    }
    
    mInitSuccesful = true;
  }

  @Override
  public void surfaceCreated(SurfaceHolder holder) {
    try {
//      if(!mInitSuccesful)
        initRecorder(mHolder.getSurface());
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }
  
  @Override
  public void surfaceDestroyed(SurfaceHolder holder) {
    shutdown();
  }
  
  @Override
  public void surfaceChanged(SurfaceHolder holder, int format, int width,
      int height) {}

  
  private void shutdown() {
    // Release MediaRecorder and especially the Camera as it's a shared
    // object that can be used by other applications
    mMediaRecorder.reset();
    mMediaRecorder.release();
    mCamera.release();
    
    // once the objects have been released they can't be reused
    mMediaRecorder = null;
    mCamera = null;
  }
}

Java Source Code List

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