我在我的应用中使用自定义相机创建了一个多图像捕捉功能。但是自定义相机存在问题。自定义相机拍摄的图像不像默认相机那样清晰（使用Intent打开相机） 请帮帮我。我已经尝试了很多建议的解决方案。
CameraActivity.java
public class CameraActivity extends Activity {
private Camera mCamera;
private SharedPreferences prefs;
private String clickedMenuItem;
Button captureButton;
private LayoutInflater controlInflater = null;
private View viewControl;
private CircularImageView imgview;
private ArrayList<Bitmap> bitmapArray = new ArrayList<Bitmap>();;
private ImageView cancleimg;
private FrameLayout imgLayout;
int RESULT_IMG = 200;
int NO_IMG = 204;
FrameLayout preview;
private CameraPreview mCameraPreview;
ArrayList<CharSequence> imgarrayList = new ArrayList<CharSequence>();
Intent intent = new Intent( );
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera_preview);
clickedMenuItem = Attributes.Another_Item;
if(getIntent().hasExtra(Attributes.ClickedMenuItem)){
clickedMenuItem = getIntent().getExtras().getString(Attributes.ClickedMenuItem);
}
mCamera = getCameraInstance();
mCameraPreview = new CameraPreview(this, mCamera);
preview = (FrameLayout) findViewById(R.id.camera_preview);
preview.addView(mCameraPreview);
try{
controlInflater = LayoutInflater.from(getBaseContext());
viewControl = controlInflater.inflate(R.layout.control, null);
LayoutParams layoutParamsControl
= new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.FILL_PARENT);
this.addContentView(viewControl, layoutParamsControl);
}catch(Exception e)
{e.printStackTrace();}
captureButton = (Button)viewControl.findViewById(R.id.button_capture);
Button doneBtn = (Button)viewControl.findViewById(R.id.done);
imgview = (CircularImageView)viewControl.findViewById(R.id.captureimg);
cancleimg = (ImageView)viewControl.findViewById(R.id.cancleimg);
imgLayout = (FrameLayout)viewControl.findViewById(R.id.imglayout);
imgLayout.setVisibility(View.INVISIBLE);
if (isDIYUSer() && clickedMenuItem != null && !clickedMenuItem.equals(Attributes.Kagazz_Scanner)) {
captureButton.setBackgroundResource(R.drawable.cam);
}
cancleBtnClick();
captureButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mCamera.takePicture(null, null, mPicture);
}
});
doneBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
setResult(RESULT_IMG,intent);
bitmapArray = null;
finish();
}
});
}
@Override
public void onPause() {
try{
super.onPause();
releaseCamera();
}catch(Exception e)
{}// release the camera immediately on pause event
}
private void releaseCamera(){
try{
if (mCamera != null){
mCamera.stopPreview();
mCamera.setPreviewCallback(null);// stop the preview
mCamera.release();
preview.removeView(mCameraPreview);
mCamera = null;
// release the camera for other applicationsCODE_IMG
}
}
catch(Exception e)
{}
}
@Override
public void onBackPressed() {
imgarrayList.clear();
intent.putCharSequenceArrayListExtra("List",imgarrayList);
setResult(RESULT_IMG,intent);
finish();
}
void cancleImg()
{}
public void deleteTempImg(Uri uri)
{
try {
File file = new File(uri.getPath());
boolean isdeleted = file.delete();
if(file.exists()){
boolean deleted = file.getCanonicalFile().delete();
if(deleted)
{Log.d("tag", "file deleted.");}
}
if(file.exists()){
this.getApplicationContext().deleteFile(file.getName());
}
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public void onResume() {
super.onResume();
try{
if (mCamera == null)
{
mCamera = getCameraInstance();
// three new lines, creating a new CameraPreview, then adding it to the FrameLayout
mCameraPreview = new CameraPreview(this, mCamera);
preview = (FrameLayout) findViewById(R.id.camera_preview);
preview.addView(mCameraPreview);
}
}catch(Exception e)
{
e.printStackTrace();
}
}
/**
* Helper method to access the camera returns null if it cannot get the
* camera or does not exist
*
* @return
*/
private Camera getCameraInstance() {
mCamera = null;
try {
mCamera = Camera.open();
//STEP #1: Get rotation degrees
// Camera.CameraInfo info = new Camera.CameraInfo();
// Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_BACK, info);
// int rotation = this.getWindowManager().getDefaultDisplay().getRotation();
// int degrees = 0;
// switch (rotation) {
// case Surface.ROTATION_0: degrees = 0; break; //Natural orientation
// case Surface.ROTATION_90: degrees = 90; break; //Landscape left
// case Surface.ROTATION_180: degrees = 180; break;//Upside down
// case Surface.ROTATION_270: degrees = 270; break;//Landscape right
// }
// int rotate = (info.orientation - degrees + 360) % 360;
//STEP #2: Set the 'rotation' parameter
Camera.Parameters params = mCamera.getParameters();
// params.setRotation(rotate);
/* Set Auto focus */
List<String> focusModes = params.getSupportedFocusModes();
if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
// set the focus mode
params.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
// set Camera parameters
}
else{
if (focusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE))
params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
}
mCamera.setParameters(params);
} catch (Exception e) {
// cannot get camera or does not exist
}
return mCamera;
}
private static File getOutputMediaFile() {
File mediaStorageDir = new File(
Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
"MyCameraApp");
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d("MyCameraApp", "failed to create directory");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
.format(new Date());
File mediaFile;
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ "IMG_" + timeStamp + ".jpg");
return mediaFile;
}
public static Bitmap rotate(Bitmap bitmap, int degree) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix mtx = new Matrix();
// mtx.postRotate(degree);
mtx.setRotate(degree);
return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
}
@Override
protected void onStop() {
super.onStop();
}
}
CameraPreview.java
public class CameraPreview extends SurfaceView implements
SurfaceHolder.Callback {
private SurfaceHolder mSurfaceHolder;
private Camera mCamera;
private LayoutInflater controlInflater = null;
// Constructor that obtains context and camera
@SuppressWarnings("deprecation")
public CameraPreview(Context context, Camera camera) {
super(context);
this.mCamera = camera;
this.mSurfaceHolder = this.getHolder();
this.mSurfaceHolder.addCallback(this);
this.mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
try {
@SuppressWarnings("deprecation")
Camera.Parameters parameters = mCamera.getParameters();
if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
parameters.set("orientation", "portrait");
mCamera.setDisplayOrientation(90);
parameters.setRotation(90);
}
else {
// This is an undocumented although widely known feature
parameters.set("orientation", "landscape");
// For Android 2.2 and above
mCamera.setDisplayOrientation(0);
// Uncomment for Android 2.0 and above
parameters.setRotation(0);
}
mCamera.setPreviewDisplay(surfaceHolder);
mCamera.startPreview();
} catch (IOException e) {
}
}
@SuppressWarnings("deprecation")
@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
try{
surfaceHolder.removeCallback(this);
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}catch(Exception e)
{
if(e!=null)
e.printStackTrace();}
}
@SuppressWarnings("deprecation")
@Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int format,
int width, int height) {
// start preview with new settings
try {
mCamera.setPreviewDisplay(surfaceHolder);
mCamera.startPreview();
} catch (Exception e) {
// intentionally left blank for a test
}
}
}