public class MyCameraDemo extends Activity {
private SurfaceView surface = null ;
private Button but = null ;
private SurfaceHolder holder = null ;
private Camera cam = null ;
private boolean previewRunning = true ;
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.main);
this.but = (Button) super.findViewById(R.id.but) ;
this.surface = (SurfaceView) super.findViewById(R.id.surface) ;
this.holder = this.surface.getHolder() ;
this.holder.addCallback(new MySurfaceViewCallback()) ;
//设置缓冲类型 this.holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS) ;
//设置分辨率 this.holder.setFixedSize(600, 350);
this.but.setOnClickListener(new OnClickListenerImpl()) ;
}
private class OnClickListenerImpl implements OnClickListener {
@Override public void onClick(View v) {
if(MyCameraDemo.this.cam != null) {
//自动对焦 MyCameraDemo.this.cam.autoFocus(new AutoFocusCallbackImpl()) ;
}
}
}
private class MySurfaceViewCallback implements SurfaceHolder.Callback {
//当预览界面格式大小改变时，调用 public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
//初次实例化界面调用 public void surfaceCreated(SurfaceHolder holder) {
MyCameraDemo.this.cam = Camera.open(0) ;
// 取得第一个摄像头 //窗口服务 WindowManager manager = (WindowManager) MyCameraDemo.this .getSystemService(Context.WINDOW_SERVICE);
//取得display显示对象 Display display = manager.getDefaultDisplay() ;
//照相机参数 Parameters param = MyCameraDemo.this.cam.getParameters() ;
//将照相机预览大小设置为display大小 param.setPreviewSize(display.getWidth(), display.getHeight()) ;
param.setPreviewFrameRate(5) ;
// 一秒5帧 param.setPictureFormat(PixelFormat.JPEG) ;
// 图片形式 param.set("jpen-quality", 80) ;
//图片质量，最高100 MyCameraDemo.this.cam.setParameters(param) ;
try {
MyCameraDemo.this.cam.setPreviewDisplay(MyCameraDemo.this.holder) ;
}
catch (IOException e) {
}
MyCameraDemo.this.cam.startPreview() ;
// 进行预览 MyCameraDemo.this.previewRunning = true ;
// 已经开始预览 }
@Override public void surfaceDestroyed(SurfaceHolder holder) {
if(MyCameraDemo.this.cam != null) {
if(MyCameraDemo.this.previewRunning) {
MyCameraDemo.this.cam.stopPreview() ;
// 停止预览 MyCameraDemo.this.previewRunning = false ;
}
MyCameraDemo.this.cam.release() ;
}
}
}
private class AutoFocusCallbackImpl implements AutoFocusCallback {
@Override public void onAutoFocus(boolean success, Camera camera) {
if(success) {
// 成功 MyCameraDemo.this.cam.takePicture(sc, pc, jpgcall) ;
}
}
}
private PictureCallback jpgcall = new PictureCallback() {
@Override public void onPictureTaken(byte[] data, Camera camera) {
// 保存图片的操作 Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
String fileName = Environment.getExternalStorageDirectory() .toString() + File.separator + "mldnphoto" + File.separator + "MLDN_" + System.currentTimeMillis() + ".jpg";
File file = new File(fileName) ;
if (!file.getParentFile().exists()) {
file.getParentFile().mkdirs() ;
// 创建文件夹 }
try {
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file)) ;
bmp.compress(Bitmap.CompressFormat.JPEG, 80, bos) ;
// 向缓冲区之中压缩图片 bos.flush() ;
bos.close() ;
Toast.makeText(MyCameraDemo.this, "拍照成功，照片已保存在" + fileName + "文件之中！", Toast.LENGTH_SHORT) .show();
}
catch (Exception e) {
Toast.makeText(MyCameraDemo.this, "拍照失败！", Toast.LENGTH_SHORT) .show();
}
MyCameraDemo.this.cam.stopPreview() ;
MyCameraDemo.this.cam.startPreview() ;
}
}
;
private ShutterCallback sc = new ShutterCallback(){
@Override public void onShutter() {
// 按下快门之后进行的操作 }
}
;
private PictureCallback pc = new PictureCallback() {
@Override public void onPictureTaken(byte[] data, Camera camera) {
}
}
;
}

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <Button android:id="@+id/but" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="照相" /> <SurfaceView android:id="@+id/surface" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout>