发出带有参数设置为摄像头 [英] Issue with setting the parameters to camera
问题描述
我有一个Android应用程序与该摄像头的工作原理。于是几个atempts后,我开始通过创建一个类实现 SurfaceHolder.Callback
建设自己的相机。在这一切的大问题是,在我的方法 surfaceChanged()
当我试图设置参数相机,我得到:强制关闭
下面是我的方法是如何的样子:
公共无效surfaceChanged(SurfaceHolder架,INT格式,诠释W,INT高){
Log.e(TAGsurfaceChanged);
如果(M previewRunning){
mCamera.stop preVIEW();
} Camera.Parameters p值= mCamera.getParameters();
清单<尺寸和GT;尺寸= p.getSupportedPictureSizes(); 的System.out.println(利斯塔德parametrii埃斯特urmatoarea:+大小);
尺寸尺寸= sizes.get(0);
p.setPictureSize(size.width,size.height); P.SET previewSize(W,H);
mCamera.setParameters(P);
尝试{
mCamera.set previewDisplay(支架);
}赶上(IOException异常五){
// TODO自动生成catch块
e.printStackTrace();
}
mCamera.start preVIEW();
米previewRunning = TRUE;
}
如果我尝试上面的方式:
Camera.Parameters P = mCamera.getParameters();
清单<尺寸和GT;尺寸= p.getSupportedPictureSizes();
尺寸尺寸= sizes.get(0);
p.setPictureSize(size.width,size.height);
然后尺寸
是空
,我在这行得到错误:
尺寸大小= sizes.get(0);
如果我这样做是这样的:
公共无效surfaceChanged(SurfaceHolder架,INT格式,诠释W,INT高){
Log.e(TAGsurfaceChanged);
如果(M previewRunning){
mCamera.stop preVIEW();
} Camera.Parameters p值= mCamera.getParameters();
P.SET previewSize(W,H);
mCamera.setParameters(P);
尝试{
mCamera.set previewDisplay(支架);
}赶上(IOException异常五){
// TODO自动生成catch块
e.printStackTrace();
}
mCamera.start preVIEW();
米previewRunning = TRUE;
}
我收到以下错误:
致命异常:主要
了java.lang.RuntimeException:setParameters失败
在android.hardware.Camera.native_setParameters(本机方法)
在android.hardware.Camera.setParameters(Camera.java:914)
在com.SplashScreen.EditPhoto.surfaceChanged(EditPhoto.java:535)
在android.view.SurfaceView.updateWindow(SurfaceView.java:554)
在android.view.SurfaceView.dispatchDraw(SurfaceView.java:353)
在android.view.ViewGroup.drawChild(ViewGroup.java:1719)
在android.view.ViewGroup.dispatchDraw(ViewGroup.java:1448)
在android.view.ViewGroup.drawChild(ViewGroup.java:1719)
在android.view.ViewGroup.dispatchDraw(ViewGroup.java:1448)
在android.view.View.draw(View.java:6971)
在android.widget.FrameLayout.draw(FrameLayout.java:361)
那么,什么是设置参数的正确方法?谢谢!
修改:这是我实例化我的相机:
公共无效surfaceCreated(SurfaceHolder持有人){
Log.e(TAGsurfaceCreated);
mCamera = Camera.open();}
您正在做正确的方式,我有一个类似的方法,酷似你的,完美的作品。我能想象你的方法失败的唯一原因是宽度和高度值。检查出来。还检查mCamera对象正确实例。
我看到你打电话getSupportedPictureSize(),你尝试过getSupported previewSizes()?
干杯
I'm have an android app which works with the camera. So after a few atempts I started building my own camera by creating a class that implements SurfaceHolder.Callback
. The big problem in all this is that in my method surfaceChanged()
when I'm trying to set the parameters to the camera I get: FORCE CLOSE.
Here is how my method looks like:
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
Log.e(TAG, "surfaceChanged");
if (mPreviewRunning) {
mCamera.stopPreview();
}
Camera.Parameters p = mCamera.getParameters();
List<Size> sizes = p.getSupportedPictureSizes();
System.out.println("Lista de parametrii este urmatoarea:"+sizes);
Size size = sizes.get(0);
p.setPictureSize(size.width, size.height);
p.setPreviewSize(w, h);
mCamera.setParameters(p);
try {
mCamera.setPreviewDisplay(holder);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mCamera.startPreview();
mPreviewRunning = true;
}
If I try the above way:
Camera.Parameters p = mCamera.getParameters();
List<Size> sizes = p.getSupportedPictureSizes();
Size size = sizes.get(0);
p.setPictureSize(size.width, size.height);
Then size
is null
and I get error at this line:
Size size = sizes.get(0);
If I do this way:
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
Log.e(TAG, "surfaceChanged");
if (mPreviewRunning) {
mCamera.stopPreview();
}
Camera.Parameters p = mCamera.getParameters();
p.setPreviewSize(w, h);
mCamera.setParameters(p);
try {
mCamera.setPreviewDisplay(holder);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mCamera.startPreview();
mPreviewRunning = true;
}
I get the following error:
FATAL EXCEPTION: main
java.lang.RuntimeException: setParameters failed
at android.hardware.Camera.native_setParameters(Native Method)
at android.hardware.Camera.setParameters(Camera.java:914)
at com.SplashScreen.EditPhoto.surfaceChanged(EditPhoto.java:535)
at android.view.SurfaceView.updateWindow(SurfaceView.java:554)
at android.view.SurfaceView.dispatchDraw(SurfaceView.java:353)
at android.view.ViewGroup.drawChild(ViewGroup.java:1719)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1448)
at android.view.ViewGroup.drawChild(ViewGroup.java:1719)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1448)
at android.view.View.draw(View.java:6971)
at android.widget.FrameLayout.draw(FrameLayout.java:361)
So what's the proper way to set parameters?Thank you!
EDIT: This is how I instantiate my camera:
public void surfaceCreated(SurfaceHolder holder) {
Log.e(TAG, "surfaceCreated");
mCamera = Camera.open();
}
You're doing it the proper way, I have a similar method, exactly like yours, that works perfectly. The only reason I could imagine for your method to fail are the width and height values. Check them out. Check also if the mCamera object is properly instantiated.
I see that you call getSupportedPictureSize(), have you tried getSupportedPreviewSizes() ?
Cheers
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