我尝试捕捉图像，在Surfaceview中进行预览，并且有一个按钮，通过该按钮拍摄照片并保存到存储卡中。预览和捕捉效果很好，但无法存储在存储卡上。 有创建的文件，但图片不是一个一个地存储... 请帮我... 我的尝试就在这里......
public class MainActivity extends Activity {
int TAKE_PHOTO_CODE = 0;
public static int count=0;
Camera mCamera;
private CameraView cameraview;
RelativeLayout mainlayout;
ImageView capture;
ImageView image;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
cameraview = new CameraView(this, CameraInfo.CAMERA_FACING_BACK);
setContentView(R.layout.activity_main);
mainlayout = (RelativeLayout) findViewById(R.id.mainlayout);
mainlayout.addView(cameraview);
capture=(ImageView)findViewById(R.id.capture);
/////////////////////////////////////////////////////////
final String dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/picFolder/";
File newdir = new File(dir);
newdir.mkdirs();
capture.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
//if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB) {
// getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);
cameraview.mCamera.takePicture(shutterCallback, rawCallback,
jpegCallback);
Toast.makeText(getApplicationContext(), "Captured", 2000).show();
}
});
}
ShutterCallback shutterCallback = new ShutterCallback() {
public void onShutter() {
// Log.d(TAG, "onShutter'd");
}
};
/** Handles data for raw picture */
PictureCallback rawCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
//Log.d(TAG, "onPictureTaken - raw");
}
};
/** Handles data for jpeg picture */
PictureCallback jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format(
"/sdcard/Demo%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
};
}
我的CameraView类就在这里..
public class CameraView extends SurfaceView implements SurfaceHolder.Callback {
SurfaceHolder mHolder;
Camera mCamera;
int mCameraFacingInfo;
Context m_context;
public CameraView(Context context, int camereface) {
super(context);
// TODO Auto-generated constructor stub
m_context = context;
mCameraFacingInfo = camereface;
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
if (mCamera != null) {
int rotation = ((Activity) m_context).getWindowManager()
.getDefaultDisplay().getRotation();
if (rotation == Surface.ROTATION_0
|| rotation == Surface.ROTATION_180) {
mCamera.setDisplayOrientation(90);
} else if (rotation == Surface.ROTATION_90) {
mCamera.setDisplayOrientation(0);
} else if (rotation == Surface.ROTATION_270) {
mCamera.setDisplayOrientation(180);
}
Camera.Parameters parameters = mCamera.getParameters();
parameters.setPreviewSize(width, height);
// mCamera.setParameters(parameters);
mCamera.startPreview();
}
}
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
@SuppressLint("NewApi")
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
// ////////////////////////////////////////////////////
/*mCamera.setCameraViewDisplay(holder);
mCamera.setCameraViewCallback(new CameraViewCallback() {
public void onPreviewFrame(byte[] data, Camera arg1) {
//
CameraView.this.invalidate();
}
});
*/
// //////////////////////////////////////////
synchronized (this) {
int cameraFacingInfo = -1;
boolean errorFound = false;
boolean hasFeatCamera = m_context.getPackageManager()
.hasSystemFeature(PackageManager.FEATURE_CAMERA);
if (hasFeatCamera) {
try {
cameraFacingInfo = mCameraFacingInfo;
mCamera = Camera.open(cameraFacingInfo);
} catch (Exception e) {
mCamera = Camera.open(0);
}
} else if (CameraInfo.CAMERA_FACING_FRONT > -1) {
try {
cameraFacingInfo = CameraInfo.CAMERA_FACING_FRONT;
mCamera = Camera.open(cameraFacingInfo);
} catch (Exception e) {
errorFound = true;
}
if (errorFound == true) {
try {
mCamera = Camera.open(0);
cameraFacingInfo = 0;
} catch (Exception e) {
cameraFacingInfo = -1;
}
}
}
if (cameraFacingInfo < 0) {
Toast.makeText(m_context, "No camera found.", Toast.LENGTH_LONG)
.show();
}
if (mCamera != null) {
try {
mCamera.setPreviewDisplay(holder);
int rotation = ((Activity) m_context).getWindowManager()
.getDefaultDisplay().getRotation();
if (rotation == Surface.ROTATION_0
|| rotation == Surface.ROTATION_180) {
// Log.i(TAG, "0");
mCamera.setDisplayOrientation(90);
} else if (rotation == Surface.ROTATION_90) {
// Log.i(TAG, "90");
mCamera.setDisplayOrientation(0);
} else if (rotation == Surface.ROTATION_270) {
// Log.i(TAG, "270");
mCamera.setDisplayOrientation(180);
}
} catch (IOException exception) {
mCamera.release();
mCamera = null;
// TODO: add more exception handling logic here
}
}
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
if (mCamera != null) {
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
}
public void setCameraFacingInfo(int cameraFacingInfo) {
mCameraFacingInfo = cameraFacingInfo;
}
}
答案 0 :(得分：0)
尝试将您的jpegCallback类更改为：
PictureCallback jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
//Creating empty file in sdcard
File pictureFile = new File(String.format("/sdcard/Demo%d.jpg", System.currentTimeMillis()));
if (pictureFile == null) {
Log.e("IMAGE CAPTURE", "Error creating media file, check storage permissions: ");
return;
}
if (data != null) {
BitmapFactory.Options opts = new BitmapFactory.Options();
ActivityManager activityManager = (ActivityManager) MainActivity.this.getSystemService(Activity.ACTIVITY_SERVICE);
int memoryLimit = 100;
if (activityManager != null) {
memoryLimit = activityManager.getMemoryClass();
}
// Considering memory limitation of device we will resize image to prevent OutOfMemory
if (memoryLimit < 20) {
opts.inSampleSize = 6;
} else if (memoryLimit < 40) {
opts.inSampleSize = 4;
} else if (memoryLimit < 64) {
opts.inSampleSize = 2;
}
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length, opts);
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
if (bitmap.compress(Bitmap.CompressFormat.JPEG, 90, fos)) {
fos.close();
}
bitmap.recycle();
} catch (FileNotFoundException e) {
} catch (IOException e) {
}
}
}