Android中的严重摄像头崩溃和运行时异常

我已经创建了几个摄像头应用程序，3周前我刚刚将这些应用程序发布到谷歌Play market。到目前为止，我收到了大量的碰撞报告，如下所示：

java.lang.RuntimeException 在android.hardware.Camera.native_setParameters中
报告总数：2

java.lang.NullPointerException 在com.potatotree.autodistance.CameraSurfaceView.surfaceCreated中
报告总数：21

java.lang.RuntimeException 在android.hardware.Camera.native_自动对焦中
报告总数：2

java.lang.RuntimeException 在android.hardware.Camera.native_设置中
报告总数：12

到目前为止，总下载量约为5000。 似乎所有的异常和崩溃都与摄像机有关。以下是CameraSurfaceView的源代码和方法

public class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback{

    private SurfaceHolder mHolder;
    private Camera mCamera;
    private Context context;

    public CameraSurfaceView(Context c) {
        super(c);

        context = c;

        mHolder = getHolder();
        mHolder.addCallback(this);
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    }
    public CameraSurfaceView(Context context, AttributeSet attrs) 
    {
        super(context, attrs);
    }

    public CameraSurfaceView(Context context, AttributeSet attrs, int defStyle) 
    {
        super(context, attrs, defStyle);
    }

    public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {}
    public void surfaceCreated(SurfaceHolder holder) {

        //once image is ready(captured or load), the surfaceCreated will not trigger camera again when user click on settings
        mCamera = Camera.open();
        try
        {
            mCamera.setPreviewDisplay(holder); //may throw exception

            Parameters parameters = mCamera.getParameters();

            if(this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) 
            {
                parameters.set("orientation", "portrait");
                mCamera.setDisplayOrientation(90);
            } 
            else 
            {
                parameters.set("orientation", "landscape");
                mCamera.setDisplayOrientation(0);
            }
            mCamera.setParameters(parameters);

            mCamera.startPreview();
        }
        catch(Exception e)
        {
            mCamera.release();
            mCamera = null;
            e.printStackTrace();
        }
    }
    public void surfaceDestroyed(SurfaceHolder arg0) {

        if(mCamera != null)
        {
            mCamera.stopPreview();
            mCamera.release();
            mCamera = null;
        }
    }

    public void startCamera()   //resume camera
    {
        if(mCamera == null)
        {
            mCamera = Camera.open();
            try
            {
                mCamera.setPreviewDisplay(mHolder);

                Parameters parameters = mCamera.getParameters();
                if(this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) 
                {
                    parameters.set("orientation", "portrait");
                    mCamera.setDisplayOrientation(90);
                } 
                else 
                {
                    parameters.set("orientation", "landscape");
                    mCamera.setDisplayOrientation(0);
                }
                mCamera.setParameters(parameters);

                mCamera.startPreview();
            }
            catch(Exception e)
            {
                mCamera.release();
                mCamera = null;
                e.printStackTrace();
            }
        }
    }

    public void stopCamera() //pause camera
    {
        if(mCamera != null)
        {
            mCamera.stopPreview();
            mCamera.release();
            mCamera = null;
        }
    }

    public void onFlashLight()
    {
        mCamera.stopPreview();

        Parameters parameters = mCamera.getParameters();
        parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);
        mCamera.setParameters(parameters);

        mCamera.startPreview();
    }

    public void offFlashLight()
    {
        mCamera.stopPreview();

        Parameters parameters = mCamera.getParameters();
        parameters.setFlashMode(Parameters.FLASH_MODE_OFF);
        mCamera.setParameters(parameters);

        mCamera.startPreview();
    }

    public void takePicture()
    {
        SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(context);

        if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_AUTOFOCUS))
        {
            mCamera.autoFocus(new AutoFocusCallback() {

                public void onAutoFocus(boolean success, Camera camera) 
                {
                    mCamera.takePicture(shutterCallback, rawCallback, jpegCallback);
                }
            }); 
        }
        else
        {
            mCamera.takePicture(shutterCallback, rawCallback, jpegCallback);
        }
    }

    public void autoFocus()
    {
        if(mCamera != null)
            mCamera.autoFocus(null);
    }

    ShutterCallback shutterCallback = new ShutterCallback()
    {
        public void onShutter(){}
    };

    PictureCallback rawCallback = new PictureCallback()
    {
        public void onPictureTaken(byte[] data, Camera camera){}
    };

    PictureCallback jpegCallback = new PictureCallback(){

        public void onPictureTaken(byte[] data, Camera camera)
        {
            //something happens
        }
    };
}

这是我在清单文件中设置的uses特性和uses权限

<uses-feature android:name="android.hardware.camera" android:required="true" />
<uses-permission android:name="android.permission.CAMERA" />

下面是“com.potatotree.autodistance.CameraSurfaceView.surfaceCreated的堆栈跟踪”

这里是“android.hardware.Camera.native_自动对焦”的堆栈跟踪

这里是“android.hardware.Camera.native\u设置”的堆栈跟踪

java.lang.RuntimeException:无法连接到相机服务
在android.hardware.Camera.native_设置中（本机方法）
在android.hardware.Camera.（Camera.java:294）
打开（Camera.java:269）
位于com.potatotree.autodistance.CameraSurfaceView.surfaceCreated（CameraSurfaceView.java:72）
在android.view.SurfaceView.updateWindow（SurfaceView.java:552）上
在android.view.SurfaceView.dispatchDraw（SurfaceView.java:350）上
位于android.view.ViewGroup.drawChild（ViewGroup.java:1644）
在android.view.ViewGroup.dispatchDraw（ViewGroup.java:1373）上
位于android.view.view.draw（view.java:6994）
位于android.widget.FrameLayout.draw（FrameLayout.java:357）
位于android.view.ViewGroup.drawChild（ViewGroup.java:1646）
在android.view.ViewGroup.dispatchDraw（ViewGroup.java:1373）上
位于android.view.view.draw（view.java:6994）
位于android.widget.FrameLayout.draw（FrameLayout.java:357）
在com.android.internal.policy.impl.PhoneWindow$DecorView.draw（PhoneWindow.java:1896）上
位于android.view.ViewRoot.draw（ViewRoot.java:1527）
在android.view.ViewRoot.performTraversals（ViewRoot.java:1263）
在android.view.ViewRoot.handleMessage（ViewRoot.java:1864）
位于android.os.Handler.dispatchMessage（Handler.java:99）
位于android.os.Looper.loop（Looper.java:130）
位于android.app.ActivityThread.main（ActivityThread.java:3735）
位于java.lang.reflect.Method.Invokenactive（本机方法）
位于java.lang.reflect.Method.invoke（Method.java:507）
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run上（ZygoteInit.java:904）
位于com.android.internal.os.ZygoteInit.main（ZygoteInit.java:662）
在dalvik.system.NativeStart.main（本机方法）

如果我的代码有任何错误，有没有专家可以帮助我或告诉我？

---

真的需要你的帮助！！谢谢

请发布堆栈跟踪。有这么多Android设备类型很有挑战性，但编写健壮的代码并不难，因为它不依赖于每个操作的成功。例如，

surfaceCreated（）

中仍然可以引发异常的唯一代码行是第一行和

catch

块中的代码行。第一行依赖于

Camera.open（）

才能成功。但是，文档中说，如果设备没有背向摄像头，它将返回

null

。所以你应该处理这个问题，我会说？多亏了Stacker。您的意思是最好将摄像头.open（）放在try catch块中吗？

是否会过滤掉用户在Google Play中下载的所有没有背面摄像头的设备？或者只是过滤掉没有前后摄像头的设备？我发现一些没有后置摄像头的平板电脑仍然可以从Google Play安装我的应用程序。我的

上有错误吗？

java.lang.RuntimeException: setParameters failed
at android.hardware.Camera.native_setParameters(Native Method)
at android.hardware.Camera.setParameters(Camera.java:1068)
at com.potatotree.autodistance.CameraSurfaceView.onFlashLight(CameraSurfaceView.java:168)
at com.potatotree.autodistance.AutoDistanceActivity.startCameraFlash(AutoDistanceActivity.java:224)
at com.potatotree.autodistance.CustomView.onTouchEvent(CustomView.java:876)
at android.view.View.dispatchTouchEvent(View.java:3885)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:869)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:869)
at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1779)
at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1130)
at android.app.Activity.dispatchTouchEvent(Activity.java:2096)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1763)
at android.view.ViewRoot.deliverPointerEvent(ViewRoot.java:2196)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1880)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:3703)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
at dalvik.system.NativeStart.main(Native Method)

java.lang.NullPointerException
at com.potatotree.autodistance.CameraSurfaceView.surfaceCreated(CameraSurfaceView.java:97)
at android.view.SurfaceView.updateWindow(SurfaceView.java:1108)
at android.view.SurfaceView.access$000(SurfaceView.java:87)
at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:183)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:590)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1621)
at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2446)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)

java.lang.RuntimeException: autoFocus failed
at android.hardware.Camera.native_autoFocus(Native Method)
at android.hardware.Camera.autoFocus(Camera.java:832)
at com.potatotree.autodistance.CameraSurfaceView.autoFocus(CameraSurfaceView.java:212)
at com.potatotree.autodistance.AutoDistanceActivity.startCameraFocus(AutoDistanceActivity.java:235)
at com.potatotree.autodistance.CustomView.onTouchEvent(CustomView.java:880)
at android.view.View.dispatchTouchEvent(View.java:5604)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2060)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1787)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2060)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1787)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2060)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1787)
at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1917)
at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1376)
at android.app.Activity.dispatchTouchEvent(Activity.java:2364)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1865)
at android.view.View.dispatchPointerEvent(View.java:5784)
at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:2890)
at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2466)
at android.view.ViewRootImpl.processInputEvents(ViewRootImpl.java:845)
at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2475)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4441)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590)
at dalvik.system.NativeStart.main(Native Method)

java.lang.RuntimeException: Fail to connect to camera service
at android.hardware.Camera.native_setup(Native Method)
at android.hardware.Camera.<init>(Camera.java:294)
at android.hardware.Camera.open(Camera.java:269)
at com.potatotree.autodistance.CameraSurfaceView.surfaceCreated(CameraSurfaceView.java:72)
at android.view.SurfaceView.updateWindow(SurfaceView.java:552)
at android.view.SurfaceView.dispatchDraw(SurfaceView.java:350)
at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
at android.view.View.draw(View.java:6994)
at android.widget.FrameLayout.draw(FrameLayout.java:357)
at android.view.ViewGroup.drawChild(ViewGroup.java:1646)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
at android.view.View.draw(View.java:6994)
at android.widget.FrameLayout.draw(FrameLayout.java:357)
at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1896)
at android.view.ViewRoot.draw(ViewRoot.java:1527)
at android.view.ViewRoot.performTraversals(ViewRoot.java:1263)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1864)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3735)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:662)
at dalvik.system.NativeStart.main(Native Method)