Android Open Source - OpenGLAndroid-Camera Camera Preview

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Back to project page OpenGLAndroid-Camera.

License

The source code is released under:

Apache License

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Java Source Code

package com.andrewtremblay.openglandroidcamera;
/*from ww  w.j  a  va 2s  .com*/
import java.io.IOException;

import com.andrewtremblay.openglandroidcamera.helpers.DebugHelpers;

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

public class CameraPreview extends SurfaceView implements Callback {
  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);
    }


  @Override
  public void surfaceCreated(SurfaceHolder holder) {
        // The Surface has been created, now tell the camera where to draw the preview.
        try {
            mCamera.setPreviewDisplay(holder);
            mCamera.startPreview();
        } catch (IOException e) {
            Log.d(DebugHelpers.TAG, "Error setting camera preview: " + e.getMessage());
        }
  }
  
  @Override
  public void surfaceChanged(SurfaceHolder holder, int format, int width,
      int height) {
        // 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(DebugHelpers.TAG, "Error starting camera preview: " + e.getMessage());
        }
    }


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

}

Java Source Code List