如何捕捉图像，并将其保存在SD卡 [英] How to capture the image and save it in sd card
本文介绍了如何捕捉图像，并将其保存在SD卡的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
嘿，大家好我用下面的code，从我的应用程序访问的摄像头。 该应用程序能够访问摄像机我还增加了其onclicklistener增加了此行的code按钮： -
camera.takePicture（mShutterCallback，mPictureCallbackRaw，mPictureCallbackJpeg）;
现在我不知道会发生什么，但应用程序卡住我必须强制关闭它，然后我甚至不能访问本机摄像头的应用程序。 我认为它使应用程序不释放Camera对象。 加上形象永远不会被保存。
code： -
SurfaceHolder持有人;
SurfaceView表面;
摄像头摄像头;
布尔值是previewRunning，fromOnResume;
// preVIEW米preVIEW;
/ **第一次创建活动时调用。 * /
@覆盖
公共无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.main）;
为previewRunning = FALSE;
fromOnResume = FALSE;
// requestWindowFeature（Window.FEATURE_NO_TITLE）;
表面=（SurfaceView）findViewById（R.id.surface）;
支架= surface.getHolder（）;
holder.addCallback（本）;
holder.setType（SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS）;
按钮BTN =（按钮）findViewById（R.id.click）;
btn.setOnClickListener（新OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
// TODO自动生成方法存根
camera.takePicture（mShutterCallback，mPictureCallbackRaw，mPictureCallbackJpeg）;
//的onCreate（空）;
}
}）;
}
@覆盖
公共无效surfaceChanged（SurfaceHolder持有人，INT格式，诠释的宽度，
INT高度）{
/ *如果（是previewRunning）{
camera.stop preVIEW（）;
} * /
Camera.Parameters参数= camera.getParameters（）;
名单＆LT;大小＆GT;大小= parameters.getSupported previewSizes（）;
尺寸尺寸= sizes.get（0）;
parameters.set previewSize（size.width，size.height）;
camera.setParameters（参数）;
camera.start preVIEW（）;
为previewRunning = TRUE;
}
@覆盖
公共无效surfaceCreated（SurfaceHolder持有者）{
// TODO自动生成方法存根
相机= Camera.open（）;
尝试 {
camera.set previewDisplay（保持器）;
}赶上（IOException异常E）{
// TODO自动生成的catch块
e.printStackTrace（）;
}
}
@覆盖
公共无效surfaceDestroyed（SurfaceHolder持有者）{
// TODO自动生成方法存根
camera.stop preVIEW（）;
camera.release（）;
摄像头= NULL;
}
Camera.PictureCallback mPictureCallbackRaw =新Camera.PictureCallback（）{
公共无效onPictureTaken（byte []的数据，摄像机C）{
Log.e（的getClass（）getSimpleName（），PICTURE回调RAW：+数据）;
camera.start preVIEW（）;
}
};
Camera.PictureCallback mPictureCallbackJpeg =新Camera.PictureCallback（）{
公共无效onPictureTaken（byte []的数据，摄像机C）{
Log.e（的getClass（）getSimpleName（），PICTURE CALLBACK JPEG：data.length =+数据）;
camera.start preVIEW（）;
}
};
Camera.ShutterCallback mShutterCallback =新Camera.ShutterCallback（）{
公共无效onShutter（）{
Log.e（的getClass（）getSimpleName（），快门回调。）;
}
};
/ *
*保护无效onRestoreInstanceState（包savedInstanceState）
{
super.onRestoreInstanceState（savedInstanceState）;
}
保护无效onResume（）
{
Log.e（的getClass（）getSimpleName（），onResume。）;
camera.open（）;
fromOnResume = TRUE;
super.onResume（）;
}
保护无效的onSaveInstanceState（包outState）
{
super.onSaveInstanceState（outState）;
}
@覆盖
保护无效的onPause（）{
// TODO自动生成方法存根
camera.release（）;
super.onPause（）;
}
保护无效的onStop（）
{
Log.e（的getClass（）getSimpleName（），的onStop。）;
super.onStop（）;
} * /
解决方案
我知道这是不完全的回答你的问题，但wouldn'nt它更容易使用股票摄像头应用程序？您可以使用此code。在您的活动访问：
@覆盖
公共无效的onCreate（包savedInstanceState）
{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.capture）;
按钮捕捉=（按钮）findViewById（R.id.capture_button）;
capture.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
//我们用股票相机应用程序来拍摄照片
意向意图=新的意图（MediaStore.ACTION_IMAGE_CAPTURE）;
intent.putExtra（MediaStore.EXTRA_OUTPUT，getImageUri（））;
startActivityForResult（意向，TAKE_PHOTO_ code）;
}
}）;
}
@覆盖
保护无效onActivityResult（INT申请code，INT结果code，意图数据）{
super.onActivityResult（要求code，因此code，数据）;
如果（要求code == TAKE_PHOTO_ code和;＆安培;结果code == RESULT_OK）{
开放的我们的ImagePath = getImageUri（）;
做一点事（）;
}
}
/ **
*获取捕获的文件的URI
返回：一个Uri哪一条路径是一个映像文件的路径，存储在DCIM文件夹
* /
私人乌里getImageUri（）{
在DCIM //店面形象
档案文件=新的文件（Environment.getExternalStorageDirectory（）+/ DCIM，CAPTURE_TITLE）;
乌里imgUri = Uri.fromFile（文件）;
返回imgUri;
}
hey guys i am using the following code to access camera from my application. The application is able to access the camera i have also added a button whose onclicklistener adds this line of code :-
camera.takePicture(mShutterCallback, mPictureCallbackRaw, mPictureCallbackJpeg);
Now i dont know what happens but the application gets stuck i have to force close it and then i can not even access the native camera application. I think it leaves the application without releasing the Camera object. Plus the image never gets saved.
Code :-
SurfaceHolder holder;
SurfaceView surface;
Camera camera;
Boolean isPreviewRunning, fromOnResume;
//Preview mpreview;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
isPreviewRunning = false;
fromOnResume = false;
// requestWindowFeature(Window.FEATURE_NO_TITLE);
surface = (SurfaceView)findViewById(R.id.surface);
holder = surface.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
Button btn = (Button)findViewById(R.id.click);
btn.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
camera.takePicture(mShutterCallback, mPictureCallbackRaw, mPictureCallbackJpeg);
//onCreate(null);
}
});
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
/* if (isPreviewRunning) {
camera.stopPreview();
} */
Camera.Parameters parameters = camera.getParameters();
List<Size> sizes = parameters.getSupportedPreviewSizes();
Size size = sizes.get(0);
parameters.setPreviewSize(size.width, size.height);
camera.setParameters(parameters);
camera.startPreview();
isPreviewRunning=true;
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera = Camera.open();
try {
camera.setPreviewDisplay(holder);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera.stopPreview();
camera.release();
camera=null;
}
Camera.PictureCallback mPictureCallbackRaw = new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera c) {
Log.e(getClass().getSimpleName(), "PICTURE CALLBACK RAW: " + data);
camera.startPreview();
}
};
Camera.PictureCallback mPictureCallbackJpeg= new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera c) {
Log.e(getClass().getSimpleName(), "PICTURE CALLBACK JPEG: data.length = " + data);
camera.startPreview();
}
};
Camera.ShutterCallback mShutterCallback = new Camera.ShutterCallback() {
public void onShutter() {
Log.e(getClass().getSimpleName(), "SHUTTER CALLBACK");
}
};
/*
* protected void onRestoreInstanceState(Bundle savedInstanceState)
{
super.onRestoreInstanceState(savedInstanceState);
}
protected void onResume()
{
Log.e(getClass().getSimpleName(), "onResume");
camera.open();
fromOnResume=true;
super.onResume();
}
protected void onSaveInstanceState(Bundle outState)
{
super.onSaveInstanceState(outState);
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
camera.release();
super.onPause();
}
protected void onStop()
{
Log.e(getClass().getSimpleName(), "onStop");
super.onStop();
}*/
解决方案
I know this isn't exactly an answer to your question, but wouldn'nt it be easier to use the stock camera application? You can access it using this code in your activity:
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.capture);
Button capture = (Button) findViewById(R.id.capture_button);
capture.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// We use the stock camera app to take a photo
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, getImageUri());
startActivityForResult(intent, TAKE_PHOTO_CODE);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == TAKE_PHOTO_CODE && resultCode == RESULT_OK) {
Uri imagePath = getImageUri();
doSomething();
}
}
/**
* Get the uri of the captured file
* @return A Uri which path is the path of an image file, stored on the dcim folder
*/
private Uri getImageUri() {
// Store image in dcim
File file = new File(Environment.getExternalStorageDirectory() + "/DCIM", CAPTURE_TITLE);
Uri imgUri = Uri.fromFile(file);
return imgUri;
}
这篇关于如何捕捉图像，并将其保存在SD卡的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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