Android Open Source - android-camera-api Camera Preview

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License

The source code is released under:

This is free and unencumbered software released into the public domain. Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a co...

Java Source Code

package com.tanukiteam.camera;
/*from w  ww .  j ava2  s  .com*/
import java.io.IOException;
import java.util.List;
import android.content.Context;
import android.hardware.Camera;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

/**
 * Camera Preview Auxiliary Class
 * @author ajuarez@tanukiteam.com
 */

public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
    private SurfaceHolder mHolder;
    private Camera mCamera;
    private List<Camera.Size> supportedSizes;
        
    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 {
            //Set the display:
          mCamera.setPreviewDisplay(holder);
           
            //Get the parameters:
            Camera.Parameters parameters = mCamera.getParameters();
            
            //Get the supported preview sizes and set them:
            supportedSizes = mCamera.getParameters().getSupportedPreviewSizes();
            parameters.setPreviewSize(supportedSizes.get(0).width,supportedSizes.get(0).height);            
            mCamera.setParameters(parameters);            
            //Start the preview:
            mCamera.startPreview();
        } catch (IOException e) {
            Log.d("ERROR", "Error setting camera preview: " + e.getMessage());
        }
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        //Empty, the camera release takes place in the 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("ERROR", "Error starting camera preview: " + e.getMessage());
        }
    }
    
    public SurfaceHolder getSurfaceHolder(){
      return this.mHolder;
    }
    
    
    
}

Java Source Code List

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