由于電腦的原因，搞 了幾天，今天才能學(xué)習(xí)~唉！

相機(jī)，在Android中，有一個(gè)類Camera，我們只要了解其中的方法就可以很快會(huì)用，個(gè)中方法請參照官方文檔！

以下為本人打的代碼：

MainActivity.java:

View Code package com.chiefcto.camera;

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Window;
import android.view.WindowManager;

public class MainActivity extends Activity {
//Properties
private Preview mPreview;


/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);

mPreview = new Preview(MainActivity.this);
setContentView(mPreview);
}

@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
switch (keyCode) {
case KeyEvent.KEYCODE_DPAD_CENTER:
mPreview.takePicture();
break;
}
return true;
}


}

Preview.java:

View Code package com.chiefcto.camera;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class Preview extends SurfaceView implements SurfaceHolder.Callback{
//Properties
SurfaceHolder mHolder;
Camera mCamera;
Bitmap cameraBitmap;

public Preview(Context context) {
super(context);
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
Camera.Parameters parameters = mCamera.getParameters();
parameters.setPictureFormat(PixelFormat.JPEG);
parameters.setPictureSize(320, 480);
mCamera.setParameters(parameters);
mCamera.startPreview();
}

@Override
public void surfaceCreated(SurfaceHolder holder) {
mCamera = Camera.open();
try {
mCamera.setPreviewDisplay(holder);
}
catch (IOException e) {
mCamera.release();
mCamera = null;
}
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
mCamera.stopPreview();
mCamera = null;
}

public void takePicture() {
if(mCamera != null) {
mCamera.takePicture(null, null, jpegCallback);
}
}

private PictureCallback jpegCallback = new PictureCallback() {

@Override
public void onPictureTaken(byte[] data, Camera camera) {
cameraBitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
File myCaptureFile = new File("/sdcard/camera/camera1.jpg");
try {
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(myCaptureFile));
cameraBitmap.compress(Bitmap.CompressFormat.JPEG, 80, bos);
bos.flush();
bos.close();
Canvas canvas = mHolder.lockCanvas();
canvas.drawBitmap(cameraBitmap, 0, 0, null);
mHolder.unlockCanvasAndPost(canvas);
}
catch (Exception e) {
e.getStackTrace();
}
}
};

}

PS:在虛擬機(jī)中是運(yùn)行不了的，因?yàn)槠錄]有攝相頭，所以得用真機(jī)。當(dāng)然，也可以調(diào)用電腦的攝相頭代替。

轉(zhuǎn)載于:https://www.cnblogs.com/chiefCTO/archive/2011/09/27/2193637.html

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