android camera 通过onPreviewFrame采集视频

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package com.example.camera;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.app.Activity;
import android.graphics.Rect;
import android.graphics.YuvImage;
import android.hardware.Camera;
import android.hardware.Camera.Size;
import android.os.Bundle;
import android.os.Environment;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class MainActivity extends Activity implements SurfaceHolder.Callback,
		Camera.PreviewCallback {

	private SurfaceView mSurfaceview = null; // SurfaceView对象：(视图组件)视频显示
	private SurfaceHolder mSurfaceHolder = null; // SurfaceHolder对象：(抽象接口)SurfaceView支持类
	private Camera mCamera = null; // Camera对象，相机预览

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		mSurfaceview = (SurfaceView) findViewById(R.id.surfaceview);
		mSurfaceHolder = mSurfaceview.getHolder(); // 绑定SurfaceView，取得SurfaceHolder对象
		mSurfaceHolder.addCallback(this); // SurfaceHolder加入回调接口
		// mSurfaceHolder.setFixedSize(176, 144); // 预览大小設置
		mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);// 設置顯示器類型，setType必须设置
	}

	@Override
	public void surfaceChanged(SurfaceHolder holder, int format, int width,
			int height) {
		if (mCamera == null) {
			return;
		}
		mCamera.stopPreview();
		mCamera.setPreviewCallback(this);
		mCamera.startPreview();
	}

	@Override
	protected void onResume() {
		super.onResume();
		mCamera = Camera.open();
	}

	@Override
	protected void onPause() {
		super.onPause();
		if (mCamera != null) {
			mCamera.release();
			mCamera = null;
		}
	}

	@Override
	public void surfaceCreated(SurfaceHolder holder) {
		try {
			if (mCamera != null) {
				mCamera.setPreviewDisplay(mSurfaceHolder);
				mCamera.startPreview();
			}
		} catch (IOException e) {
			e.printStackTrace();
		}

	}

	@Override
	public void surfaceDestroyed(SurfaceHolder holder) {

	}

	@Override
	public void onPreviewFrame(byte[] data, Camera camera) {

		// 刚刚拍照的文件名
		String fileName = "IMG_"
				+ new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date())
						.toString() + ".jpg";
		File sdRoot = Environment.getExternalStorageDirectory();
		String dir = "/Camera/";
		File mkDir = new File(sdRoot, dir);
		if (!mkDir.exists())
			mkDir.mkdirs();
		File pictureFile = new File(sdRoot, dir + fileName);
		if (!pictureFile.exists()) {
			try {
				pictureFile.createNewFile();
				Camera.Parameters parameters = camera.getParameters();
				Size size = parameters.getPreviewSize();
				YuvImage image = new YuvImage(data,
						parameters.getPreviewFormat(), size.width, size.height,
						null);
				FileOutputStream filecon = new FileOutputStream(pictureFile);
				image.compressToJpeg(
						new Rect(0, 0, image.getWidth(), image.getHeight()),
						90, filecon);
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
}

参考：

http://www.cnblogs.com/mengyan/archive/2012/09/01/2666641.html

http://www.cnblogs.com/sight/archive/2012/04/17/2453671.html

http://www.cnblogs.com/ice4c/archive/2010/10/18/1854756.html

转载于:https://my.oschina.net/eclipse88/blog/80115