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我正在使用 Camera2 API 开发应用程序。我的问题看起来像这样：当我在相机片段工作时按下设备的睡眠按钮，然后我唤醒设备，应用程序重新启动

12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime: FATAL EXCEPTION: main
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime: Process: com.snapsportz.nexus5camera.app, PID: 5081
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime: java.lang.RuntimeException: Unable to pause activity {com.snapsportz.nexus5camera.app/com.snapsportz.handheldcamera.app.CameraActivity}: java.lang.SecurityException: Lacking privileges to access camera service
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3381)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3340)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4047)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.ActivityThread.-wrap15(ActivityThread.java)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1350)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:102)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:148)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:5417)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Native Method)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:  Caused by: java.lang.SecurityException: Lacking privileges to access camera service
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.hardware.camera2.utils.CameraBinderDecorator.throwOnError(CameraBinderDecorator.java:108)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.hardware.camera2.utils.CameraBinderDecorator$CameraBinderDecoratorListener.onAfterInvocation(CameraBinderDecorator.java:73)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.hardware.camera2.utils.Decorator.invoke(Decorator.java:81)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at java.lang.reflect.Proxy.invoke(Proxy.java:393)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at $Proxy1.cancelRequest(Unknown Source)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.hardware.camera2.impl.CameraDeviceImpl.stopRepeating(CameraDeviceImpl.java:899)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.hardware.camera2.impl.CameraCaptureSessionImpl.close(CameraCaptureSessionImpl.java:373)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at com.snapsportz.handheldcamera.app.Camera2BasicFragment.closeCamera(Camera2BasicFragment.java:899)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at com.snapsportz.handheldcamera.app.Camera2BasicFragment.onPause(Camera2BasicFragment.java:771)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.Fragment.performPause(Fragment.java:2379)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1019)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1148)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1130)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.FragmentManagerImpl.dispatchPause(FragmentManager.java:1967)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.FragmentController.dispatchPause(FragmentController.java:185)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.Activity.performPause(Activity.java:6346)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1311)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3367)
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3340) 
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4047) 
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.ActivityThread.-wrap15(ActivityThread.java) 
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1350) 
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:102) 
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:148) 
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:5417) 
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Native Method) 
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
12-10 10:59:10.423 5081-5081/com.snapsportz.nexus5camera.app E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

我相信这不是清单文件中缺少相机权限，因为它包含在其中，并且应用程序运行良好，除非我尝试唤醒它。

我会很高兴任何提示。

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2 回答 2

2

如果您使用 Google Camera2Basic 示例应用程序 -问题 #42似乎描述了该问题。解决方案是在调用之前检查你在你的- 和调用中使用的onResume方法。似乎解决了我对.FragmentcloseCamera()openCamera()onResume()Camera2Basic

于 2016-05-25T15:11:17.530 回答
1

通常，这是因为您没有停止摄像头设备。我在 onPause/onResume 活动覆盖方法中解决了这个问题：

@Override
protected void onResume() {
    super.onResume();
    Log.e(TAG, "onResume");
    ...
    openCamera();
    ...
}
@Override
protected void onPause() {
    Log.e(TAG, "onPause");
    closeCamera();
    super.onPause();
}

这对我有用。

问候。-

于 2016-10-21T21:26:10.093 回答