Android Open Source - gatoloco Preview

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.grumpycat;
//www. j  av  a  2 s.  c o  m
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;

import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.hardware.Camera;
import android.hardware.Camera.PreviewCallback;
import android.os.Environment;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

class Preview extends SurfaceView implements SurfaceHolder.Callback {
  private static final String TAG = "Preview";

  SurfaceHolder mHolder;
  public Camera camera;
  public String filename;

  Preview(Context context) {
    super(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) {
    camera = Camera.open();
    try {
      camera.setPreviewDisplay(holder);
      Camera.Parameters parameters = camera.getParameters();
      if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
        parameters.set("orientation", "portrait");
        // For Android Version 2.2 and above
        camera.setDisplayOrientation(90);
        // For Android Version 2.0 and above
        parameters.setRotation(90);
      }
      
//      camera.setPreviewCallback(new PreviewCallback() {
//
//        public void onPreviewFrame(byte[] data, Camera arg1) {
//          FileOutputStream outStream = null;
//          try {
//            filename = String.format(Environment
//                .getExternalStorageDirectory().getPath()
//                + "/%d.jpg", System.currentTimeMillis());
//            outStream = new FileOutputStream(filename);
//            outStream.write(data);
//            outStream.close();
//            Log.d(TAG, "onPreviewFrame - wrote bytes: "
//                + data.length);
//          } catch (FileNotFoundException e) {
//            e.printStackTrace();
//          } catch (IOException e) {
//            e.printStackTrace();
//          } finally {
//          }
//          Preview.this.invalidate();
//        }
//      });
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

  public void surfaceDestroyed(SurfaceHolder holder) {
    camera.stopPreview();
    camera.release();
//    camera = null;
  }

  public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
//    Camera.Parameters parameters = camera.getParameters();
//    List<Camera.Size> previewSizes = parameters.getSupportedPreviewSizes();
//    Camera.Size previewSize = previewSizes.get(0);
//    parameters.setPreviewSize(previewSize.width, previewSize.height);
//    parameters.getHorizontalViewAngle();
//    
//    camera.setParameters(parameters);
    camera.startPreview();
  }

  @Override
  public void draw(Canvas canvas) {
    super.draw(canvas);
    Paint p = new Paint(Color.RED);
    Log.d(TAG, "draw");
    canvas.drawText("PREVIEW", canvas.getWidth() / 2,
        canvas.getHeight() / 2, p);
  }

  public int changeCamera() {
    return 1;
  }
}

Java Source Code List

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