Android Open Source - Look Preview

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License

The source code is released under:

====================== LOOK! LICENSING TERMS ====================== look! is licensed under the BSD 3-Clause (also known as "BSD New" or "BSD Simplified"), as follows: Copyright (c) 2010-2012, Look...

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Java Source Code

/**
*-----------------------------------------------------------------------------
* Copyright (c) 2012, Look! Development Team
* All rights reserved.//from   w w w .j  a v  a2s. c o m
*
* Distributed under the terms of the BSD Simplified License.
*
* The full license is in the LICENSE file, distributed with this software.
*-----------------------------------------------------------------------------
*/
package es.ucm.look.ar;

import java.io.IOException;

import android.app.Activity;
import android.hardware.Camera;
import android.util.Log;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import es.ucm.look.ar.util.CameraParametersHelper;

public class Preview extends SurfaceView implements SurfaceHolder.Callback {
  private SurfaceHolder mHolder;
  private Camera mCamera;
  private Activity activity;

  Preview(Activity context) {
    super(context);
    this.activity = context;

    // Install a SurfaceHolder.Callback so we get notified when the
    // underlying surface is created and destroyed.
    mHolder = getHolder();
    mHolder.addCallback(this);
    mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
  }

  public void surfaceCreated(SurfaceHolder holder) {
    // The Surface has been created, acquire the camera and tell it where
    // to draw.
    mCamera = Camera.open();
    try {
      mCamera.setPreviewDisplay(holder);
    } catch (IOException exception) {
      mCamera.release();
      mCamera = null;
      // TODO: add more exception handling logic here
    }
  }

  public void surfaceDestroyed(SurfaceHolder holder) {
    // Surface will be destroyed when we return, so stop the preview.
    // Because the CameraDevice object is not a shared resource, it's very
    // important to release it when the activity is paused.
    mCamera.stopPreview();
    mCamera.release();
    mCamera = null;
    Log.i("activity", "camera surfaceDestroyed");
  }

  public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
    // Now that the size is known, set up the camera parameters and begin
    // the preview.

    Camera.Parameters parameters = mCamera.getParameters();

    parameters.setPreviewSize(w, h);

    int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
    int degrees = 0;
    switch (rotation) {
    case Surface.ROTATION_0:
      degrees = 0;
      break;
    case Surface.ROTATION_90:
      degrees = 270;
      break;
    case Surface.ROTATION_180:
      degrees = 180;
      break;
    case Surface.ROTATION_270:
      degrees = 90;
      break;
    }

    CameraParametersHelper.setCameraParameters(mCamera, w, h);
    mCamera.setDisplayOrientation((degrees + 90) % 360);
    mCamera.startPreview();
    Log.i("activity", "camera surfaceChanged");
  }
  
}

Java Source Code List