我已经阅读了关于Android中安全开启/关闭相机堆栈的android指南和问题,但是我还没有找到答案。 这里是我的开启相机(延伸SurfaceView CameraView类中)的代码片段:Android相机安全开启/关闭
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.FROYO) {
this.camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);
} else {
this.camera = Camera.open();
}
} catch (IOException ioe) {
ioe.printStackTrace(System.out);
}
}
我检查BUILD_SDK因为实例上Nexus7 camera.open为()不工作 - 我必须使用相机。开(0) - 但camera.open(INT)不提供SDK 8.这是我的闭幕式相机片断:
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
releaseCamera();
}
public void releaseCamera(){
if (camera != null) {
camera.stopPreview();
camera.setPreviewCallback(null);
camera.release();
camera = null;
}
}
我还使用releaseCamera()函数时我CameraView活动连接进入onPause状态。 此代码在大多数设备上都能正常工作(我已经在Galaxy GIO,LG 4X HD和Galaxy S2上进行了检查),但是我发布了这个代码片段的应用程序,并且用户仍然报告连接到相机的崩溃,这里是他们的logcat:
java.lang.RuntimeException: Fail to connect to camera service
at android.hardware.Camera.native_setup(Native Method)
at android.hardware.Camera.<init>(Camera.java:423)
at android.hardware.Camera.open(Camera.java:384)
at com.artostolab.xray.CameraView.surfaceCreated(CameraView.java:101)
at android.view.SurfaceView.updateWindow(SurfaceView.java:606)
at android.view.SurfaceView.access$000(SurfaceView.java:88)
at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:183)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:692)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2123)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1139)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4879)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:776)
at android.view.Choreographer.doCallbacks(Choreographer.java:579)
at android.view.Choreographer.doFrame(Choreographer.java:548)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:762)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:153)
at android.app.ActivityThread.main(ActivityThread.java:5297)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
at dalvik.system.NativeStart.main(Native Method)
及其设备: LG擎天柱G(geehrc4g) LG擎天柱L7(U0)
IRIS504Q
你有任何想法,为什么会出现这种情况?在此先感谢
UPDATE 2014年1月21日
我现在使用的功能找回来的CommonsWare提出的相机,它工作正常,但现在我走了同样的错误形式的其他用户用不那么流行的设备(Htc EVo 3D,城市生活,华为U8815)。你知道什么可能导致这个问题?下面是从他们的logcat(我已更新的主要问题) -
java.lang.RuntimeException: Fail to connect to camera service
at android.hardware.Camera.native_setup(Native Method)
at android.hardware.Camera.<init>(Camera.java:300)
at android.hardware.Camera.open(Camera.java:253)
at com.artostolab.xray.CameraView.surfaceCreated(CameraView.java:105)
at android.view.SurfaceView.updateWindow(SurfaceView.java:552)
at android.view.SurfaceView.dispatchDraw(SurfaceView.java:350)
at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
at android.view.View.draw(View.java:6892)
at android.widget.FrameLayout.draw(FrameLayout.java:357)
at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1884)
at android.view.ViewRoot.draw(ViewRoot.java:1524)
at android.view.ViewRoot.performTraversals(ViewRoot.java:1260)
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:3683)
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:878)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:636)
at dalvik.system.NativeStart.main(Native Method)
而我的功能找到合适的相机
public int findBackCamera() {
int cameraId = -1;
int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numberOfCameras; i++) {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
cameraId = i;
break;
}
}
return cameraId;
}
为什么不开一个新的问题?它不会花费额外的钱,但更容易遵循和回答。 FWIW,你的新代码不会检查后置摄像头是否存在,并且使用'cameraId == - 1'会导致应用程序崩溃。 –