Android Open Source - iSlide Camera Preview

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Back to project page iSlide.

License

The source code is released under:

MIT License

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Java Source Code

package edu.csun.group2.islide;
/* w w w.  ja  v a2 s .c  om*/
import java.io.IOException;

import android.content.Context;
import android.hardware.Camera;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class CameraPreview extends SurfaceView implements
    SurfaceHolder.Callback {
  static final String TAG = "CameraPreview";
  private SurfaceHolder mHolder;
  private Camera mCamera;

  public CameraPreview(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);
  }

  public void surfaceCreated(SurfaceHolder holder) {
    // The Surface has been created, now tell the camera where to draw the
    // preview.
    try {
      if (!Utility.picTaken) {
        mCamera.setPreviewDisplay(holder);
        mCamera.startPreview();
      }
    } catch (IOException e) {
      Log.d(TAG, "Error setting camera preview: " + e.getMessage());
    }
  }

  public void surfaceDestroyed(SurfaceHolder holder) {
    // empty. Take care of releasing the Camera preview in your activity.
  }

  public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
    // 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
    }

    // set preview size and make any resize, rotate or
    // reformatting changes here

    // start preview with new settings
    try {
      mCamera.setPreviewDisplay(mHolder);
      mCamera.startPreview();

    } catch (Exception e) {
      Log.d(TAG, "Error starting camera preview: " + e.getMessage());
    }
  }
}

Java Source Code List