CameraPreview.java :  » Location » fflocation » com » camera » Android Open Source

package com.camera;

import java.io.IOException;

import android.content.Context;
import android.hardware.Camera;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.Toast;


/**
 * Provides a dedicated drawing surface embedded inside of a view hierarchy and
 * implements SurfaceHolder.Callback to receive information about changes to the surface
 * @author Juan Javier Garca, Aitor Martin, Andreas Kapouranis
 * 
 */
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback{

  private SurfaceHolder mHolder;
  private Camera camera;
  private Context context;
  
  
  /**
   * Constructor
   * @param context The context where the preview appears
   */
  public CameraPreview(Context context) {
    super(context);
    this.context = context;
    
    // Install a SurfaceHolder.Callback so we get notified when the surface is created and destroyed.
    mHolder = getHolder();
    mHolder.addCallback(this);
    mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

  }

  
  public void surfaceCreated(SurfaceHolder holder){
  
    //Activate the camera
    camera = Camera.open();
      try {
        //Sets the surface holder to be used for a picture preview.
        camera.setPreviewDisplay(holder);
      } catch (IOException e) {
         Toast.makeText(context, "Error while trying to sets the surface holder: " + e.getMessage(), Toast.LENGTH_LONG).show();
      }

  }

  public void surfaceDestroyed(SurfaceHolder holder) {
    //Surface will be destroyed, We stop the preview
    camera.stopPreview();
    
    //Release the camera
    camera.release();
    
  }


  public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
    
    //Set up the camara parameters.
    Camera.Parameters parameters = camera.getParameters();
    parameters.setPreviewSize(w, h);
    camera.setParameters(parameters);
    
    //Start the preview
    camera.startPreview();
  }
  

  /**
   * Get the camera
   * @return the camera
   */
  public Camera getCamera() {
  
    return camera;
  }

}