Android SurfaceView摄像头预览代码在棒棒糖制作前运行良好,但在棒棒糖设备上崩溃
我实现了一个定制的SurfaceView来绘制相机预览,并对其进行了所有的捕获和手动对焦操作。它在Lolipop之前的设备上运行得很好,但问题是它在Lolipop设备上崩溃了。 发生的最奇怪的事情是,应用程序抛出一个ANR,当我单击“确定”时,应用程序从我离开它的那一点开始运行。Android SurfaceView摄像头预览代码在棒棒糖制作前运行良好,但在棒棒糖设备上崩溃,android,android-camera,android-5.0-lollipop,Android,Android Camera,Android 5.0 Lollipop,我实现了一个定制的SurfaceView来绘制相机预览,并对其进行了所有的捕获和手动对焦操作。它在Lolipop之前的设备上运行得很好,但问题是它在Lolipop设备上崩溃了。 发生的最奇怪的事情是,应用程序抛出一个ANR,当我单击“确定”时,应用程序从我离开它的那一点开始运行。 LogCat显示“未能连接到相机错误,跳过ANR后,我可以轻松连接甚至操作我的相机”。是因为我使用了不推荐的CameraAPI,而不是Camera2和棒棒糖设备吗 我的代码是这样的: public class Came
LogCat显示“未能连接到相机错误,跳过ANR后,我可以轻松连接甚至操作我的相机”。是因为我使用了不推荐的CameraAPI,而不是Camera2和棒棒糖设备吗 我的代码是这样的:
public class CameraPreview
implements
SurfaceHolder.Callback {
private int cameratype=Camera.CameraInfo.CAMERA_FACING_BACK;
private Camera mCamera = null;
public Camera.Parameters params;
private SurfaceHolder sHolder;
private String TAG="CameraPreview";
public List<Camera.Size> supportedSizes;
public int isCamOpen = 0;
public boolean isSizeSupported = false;
private int previewWidth, previewHeight;
private List<String> mSupportedFlashModes;
private boolean flashon=false;
private final static String MYTAG = "CameraPreview";
private ProgressDialog loading;
public CameraPreview(int width, int height) {
Log.i("campreview", "Width = " + String.valueOf(width));
Log.i("campreview", "Height = " + String.valueOf(height));
previewWidth = width;
previewHeight = height;
}
private int openCamera() {
if (isCamOpen == 1) {
releaseCamera();
}
mCamera = Camera.open(cameratype);
if (mCamera == null) {
return -1;
}
if (TouchActivity.reference.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
mCamera.setDisplayOrientation(90);
} else {
mCamera.setDisplayOrientation(0);
}
params = mCamera.getParameters();
params.setPreviewSize(previewWidth, previewHeight);
try {
mCamera.setParameters(params);
} catch (RuntimeException e) {
e.printStackTrace();
}
mCamera.startPreview();
try {
mCamera.setPreviewDisplay(sHolder);
} catch (IOException e) {
mCamera.release();
mCamera = null;
return -1;
}
isCamOpen = 1;
return isCamOpen;
}
public int isCamOpen() {
return isCamOpen;
}
public void releaseCamera() {
if (mCamera != null) {
mCamera.stopPreview();
mCamera.setPreviewCallback(null);
mCamera.release();
mCamera = null;
}
isCamOpen = 0;
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
sHolder = holder;
isCamOpen = openCamera();
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
releaseCamera();
}
/**
* Called from PreviewSurfaceView to set touch focus.
*
* @param - Rect - new area for auto focus
*/
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
public void doTouchFocus(final Rect tfocusRect) {
Log.i(TAG, "TouchFocus");
try {
final List<Camera.Area> focusList = new ArrayList<Camera.Area>();
Camera.Area focusArea = new Camera.Area(tfocusRect, 1000);
focusList.add(focusArea);
Camera.Parameters para = mCamera.getParameters();
para.setFocusAreas(focusList);
para.setMeteringAreas(focusList);
mCamera.setParameters(para);
mCamera.autoFocus(myAutoFocusCallback);
} catch (Exception e) {
e.printStackTrace();
Log.i(TAG, "Unable to autofocus");
}
}
/**
* AutoFocus callback
*/
AutoFocusCallback myAutoFocusCallback = new AutoFocusCallback(){
@Override
public void onAutoFocus(boolean arg0, Camera arg1) {
if (arg0){
mCamera.cancelAutoFocus();
}
}
};
public void capturePicture(){
mCamera.takePicture(null, null, mPicture);
}
private File getOutputMediaFile(){
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), "UltimateCameraGuideApp");
if (! mediaStorageDir.exists()){
if (! mediaStorageDir.mkdirs()){
Log.d("Camera Guide", "Required media storage does not exist");
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");
//DialogHelper.showDialog("Success!", "Your picture has been saved!", TouchActivity.reference.getActivity());
return mediaFile;
}
private Camera.PictureCallback mPicture = new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
//This One is Just for Getting a File Named after it
loading=new ProgressDialog(BaseImagesContainer.reference);
loading.setMessage("Getting Image Ready");
loading.show();
File pictureFile =getOutputMediaFile();
if (pictureFile == null){
Toast.makeText(TouchActivity.reference.getActivity(), "Image retrieval failed.", Toast.LENGTH_SHORT)
.show();
return;
}
Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
if(cameratype==Camera.CameraInfo.CAMERA_FACING_BACK){
bmp=rotateImage(90,bmp);
}else{
bmp=rotateImage(270,bmp);
}
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG,1, stream);
byte[] flippedImageByteArray = stream.toByteArray();
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(flippedImageByteArray);
fos.close();
// Restart the camera preview.
//safeCameraOpenInView(mCameraView);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Uri destination = Uri.fromFile(new File(TouchActivity.reference.getActivity().getCacheDir(), "cropped"));
Uri source = Uri.fromFile(new File(pictureFile.getPath()));
Crop.of(source, destination).withMaxSize(800,800).start(TouchActivity.reference.getActivity());
}
};
public Bitmap rotateImage(int angle, Bitmap bitmapSrc) {
Matrix matrix = new Matrix();
matrix.postRotate(angle);
return Bitmap.createBitmap(bitmapSrc, 0, 0,
bitmapSrc.getWidth(), bitmapSrc.getHeight(), matrix, true);
}
public void switchCamera(){
mCamera.stopPreview();
//NB: if you don't release the current camera before switching, you app will crash
mCamera.release();
//swap the id of the camera to be used
if(cameratype==Camera.CameraInfo.CAMERA_FACING_BACK){
cameratype=Camera.CameraInfo.CAMERA_FACING_FRONT;
}else{
cameratype=Camera.CameraInfo.CAMERA_FACING_BACK;
}
try{
mCamera = Camera.open(cameratype);
}catch (Exception e){
e.printStackTrace();
Toast.makeText(TouchActivity.reference.getActivity(),"Can't Open the Camera",Toast.LENGTH_LONG).show();
}
if (TouchActivity.reference.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
mCamera.setDisplayOrientation(90);
} else {
mCamera.setDisplayOrientation(0);
}
try{
mCamera.setPreviewDisplay(sHolder);
mCamera.startPreview();
}
catch(Exception e){
e.printStackTrace();
}
}
public void switchflash(){
//Do the On Flash for now
if(!flashon){
mSupportedFlashModes = mCamera.getParameters().getSupportedFlashModes();
if (mSupportedFlashModes != null && mSupportedFlashModes.contains(Camera.Parameters.FLASH_MODE_AUTO)){
Camera.Parameters parameters = mCamera.getParameters();
parameters.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
mCamera.setParameters(parameters);
}
}else{
//flash on
//do teh off now
Camera.Parameters parameters = mCamera.getParameters();
parameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
mCamera.setParameters(parameters);
}
flashon=!flashon;
}
public void stopLoading(){
loading.dismiss();
//DialogHelper.showDialog("Oops!", "Your crop had been cancelled !", TouchActivity.reference.getActivity());
}
public类CameraPreview
工具
SurfaceHolder,回拨{
private int cameratype=Camera.CameraInfo.Camera\u面朝后;
专用摄像机mCamera=null;
公共摄像机。参数参数;
私人地面商;
私有字符串TAG=“CameraPreview”;
支持的公共列表大小;
public int isCamOpen=0;
支持的公共布尔值=false;
私有int previewWidth,PreviewWight;
私有列表MSSupportedFlashModes;
私有布尔flashon=false;
私有最终静态字符串MYTAG=“CameraPreview”;
私有对话框加载;
公共CameraPreview(整数宽度、整数高度){
Log.i(“campreview”,“Width=“+String.valueOf(Width));
Log.i(“campreview”,“Height=“+String.valueOf(Height));
预览宽度=宽度;
视力=高度;
}
私有int openCamera(){
如果(isCamOpen==1){
松开摄像头();
}
mCamera=Camera.open(cameratype);
if(mCamera==null){
返回-1;
}
if(TouchActivity.reference.getResources().getConfiguration().orientation!=Configuration.orientation\u横向){
mCamera.setDisplayOrientation(90);
}否则{
mCamera.setDisplayOrientation(0);
}
params=mCamera.getParameters();
参数设置PreviewSize(previewWidth、PreviewWight);
试一试{
mCamera.setParameters(参数);
}捕获(运行时异常e){
e、 printStackTrace();
}
mCamera.startPreview();
试一试{
mCamera.setPreviewDisplay(sHolder);
}捕获(IOE异常){
mCamera.release();
mCamera=null;
返回-1;
}
isCamOpen=1;
返回isCamOpen;
}
public int isCamOpen(){
返回isCamOpen;
}
公共无效释放摄影机(){
if(mCamera!=null){
mCamera.stopPreview();
mCamera.setPreviewCallback(null);
mCamera.release();
mCamera=null;
}
isCamOpen=0;
}
@凌驾
已创建的公共空白表面(表面持有人){
支架=支架;
isCamOpen=openCamera();
}
@凌驾
公共无效表面更改(表面文件夹持有者,整型格式,整型宽度,
整数高度){
}
@凌驾
公共空间表面覆盖(表面覆盖物持有人){
松开摄像头();
}
/**
*从PreviewSurfaceView调用以设置触摸焦点。
*
*@param-Rect-自动对焦的新区域
*/
@TargetApi(构建版本代码冰淇淋三明治)
公共无效doTouchFocus(最终Rect TFOCURECT){
Log.i(标签“TouchFocus”);
试一试{
最终列表焦点列表=新的ArrayList();
摄像头区域焦距面积=新摄像头区域(tfocusRect,1000);
focusList.add(focusrea);
Camera.Parameters para=mCamera.getParameters();
第2.2段(焦点列表);
第2段设置计量区域(焦点列表);
mCamera.setParameters(第2段);
自动对焦(myAutoFocusCallback);
}捕获(例外e){
e、 printStackTrace();
Log.i(标记“无法自动对焦”);
}
}
/**
*自动对焦回调
*/
AutoFocusCallback myAutoFocusCallback=新的AutoFocusCallback(){
@凌驾
自动对焦上的公共空白(布尔值arg0,相机arg1){
如果(arg0){
mCamera.cancelAutoFocus();
}
}
};
公共无效捕获图片(){
takePicture(null,null,mPicture);
}
私有文件getOutputMediaFile(){
File mediaStorageDir=新文件(Environment.getExternalStoragePublicDirectory(
环境。目录(图片),“UltimateCameraGuideApp”);
如果(!mediaStorageDir.exists()){
如果(!mediaStorageDir.mkdirs()){
Log.d(“摄像机指南”,“所需媒体存储不存在”);
返回null;
}
}
//创建媒体文件名
字符串时间戳=新的SimpleDateFormat(“yyyyMMdd_HHmmss”)。格式(新日期();
文件媒体文件;
mediaFile=新文件(mediaStorageDir.getPath()+File.separator+
“IMG_”+时间戳+”.jpg”);
//DialogHelper.showDialog(“成功!”,“您的图片已保存!”,TouchActivity.reference.getActivity());
返回媒体文件;
}
private Camera.PictureCallback mPicture=新建Camera.PictureCallback(){
@凌驾
公共void onPictureTaken(字节[]数据,摄像头){
//这只是为了得到一个以它命名的文件
加载=新建进度对话框(BaseImagesContainer.reference);
正在加载.setMessage(“正在准备图像”);
loading.show();
File pictureFile=getOutputMediaFile();
如果(pictureFile==null){
Toast.makeText(TouchActivity.reference.getActivity(),“图像检索失败”,Toast.LENGTH\u SHORT)
.show();
返回;
}
位图bmp=BitmapFactory.decodeByteArray(数据,0,数据.长度);
if(cameratype==Camera.CameraInfo.Camera\u面朝后){
bmp=旋转图像(90,bmp);
}否则{
bmp=旋转图像(270,bmp);
}
ByteArrayOutputStream=新建ByteArrayOutputStream();
压缩(Bitmap.CompressFormat.PNG,1,流);
字节[]flippedImageByteArray=stream.toByteArray();
试一试{
FileOutputStream fos=新的FileOutputStream(pictureFile);
fos.write(flippedImageByteArray);
fos.close();
//重新启动相机预览。