Android - LED Flash light error i cant get past!

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Hi,
I have developed a flashlight app that runs the led light from the camera. But i have 2 errors that i am not sure how to fix.

Here they are:

*Runtime error - is this because the device doesnt have led light or camera?

---------------------------

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.moschdev.hd.flashlight/com.moschdev.hd.flashlight.FlashLightActivity}: java.lang.RuntimeException: Fail to connect to camera service
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1976)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2001)
at android.app.ActivityThread.access$600(ActivityThread.java:130)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1163)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4444)
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:787)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.RuntimeException: Fail to connect to camera service
at android.hardware.Camera.native_setup(Native Method)
at android.hardware.Camera.<init>(Camera.java:327)
at android.hardware.Camera.open(Camera.java:302)
at com.moschdev.hd.flashlight.FlashLightActivity.onCreate(FlashLightActivity.java:46)
at android.app.Activity.performCreate(Activity.java:4494)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1940)

*Runtime error - This error really confused me!
------------------------------

java.lang.RuntimeException: setParameters failed
at android.hardware.Camera.native_setParameters(Native Method)
at android.hardware.Camera.setParameters(Camera.java:1010)
at com.moschdev.hd.flashlight.FlashLightActivity$1.onClick(FlashLightActivity.java:76)
at android.view.View.performClick(View.java:2485)
at android.widget.CompoundButton.performClick(CompoundButton.java:99)
at android.view.View$PerformClick.run(View.java:9080)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3717)
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)

Any help would be well appreciated!

Posted 17-Nov-12 7:05am

Mosch Dev.

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Ed Nutting · Answer 1 · 2012-11-17T09:34:00

Hi there,

This seems pretty obvious but hopefully it helps:

Your first exception says "Failed to connect to camera service.".
Therefore, when you attempt to set the Camera parameters, you get your second exception since you have not connected to the Camera service so it cannot possibly set the Camera parameters.

If the device doesn't have a camera then that is precisely why your app doesn't work. How could it possibly connect to something that doesn't exist?

If the device does have a camera, here are a few possibilities:
1) Have you remembered to add the required camera permissions to your App Manifest - if you haven't then that is why it would fail to connect to the Camera Service.
2) Make sure you haven't somehow disabled the Camera Service and that the normal camera app works - if the default camera app doesn't work then it is a phone issue not your code.
3) Make sure you read the Android documentation on how to use the Camera Service - make sure you have done all the necessary set-up, parameters, permissions etc. for it to work.

Hope this helps,
Ed