安卓：Camera.open（）中的onResume（）方法

Question

不工作，我有一個應用程序，我打開攝像頭在onResume()方法：

@Override 
    public void onResume() { 
      super.onResume(); 
     openCamera(); 
     .... 
} 


public void openCamera() { 
     try { 
      camera = Camera.open(); 
      Log.d(CAMERA, "Camre opened"); 
     } catch (Exception exception) { 
      Log.e(CAMERA, "Cannot open camera", exception); 
     } 
    } 

openCamera（）如果我不叫方法，工作正常它onResume()的方法，但onResume()方法中它使我有以下異常：

08-15 14:50:33.999: E/camera(1753): Cannot open camera 
08-15 14:50:33.999: E/camera(1753): java.lang.RuntimeException: Fail to connect to camera service 
08-15 14:50:33.999: E/camera(1753):  at android.hardware.Camera.native_setup(Native Method) 
08-15 14:50:33.999: E/camera(1753):  at android.hardware.Camera.<init>(Camera.java:302) 
08-15 14:50:33.999: E/camera(1753):  at android.hardware.Camera.open(Camera.java:279) 
08-15 14:50:33.999: E/camera(1753):  at buet.threebyzero.autoSecuritySystem.Capture.openCamera(Capture.java:46) 
08-15 14:50:33.999: E/camera(1753):  at buet.threebyzero.autoSecuritySystem.Capture.onResume(Capture.java:55) 
08-15 14:50:33.999: E/camera(1753):  at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1154) 
08-15 14:50:33.999: E/camera(1753):  at android.app.Activity.performResume(Activity.java:4539) 
08-15 14:50:33.999: E/camera(1753):  at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2434) 
08-15 14:50:33.999: E/camera(1753):  at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2472) 
08-15 14:50:33.999: E/camera(1753):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1986) 
08-15 14:50:33.999: E/camera(1753):  at android.app.ActivityThread.access$600(ActivityThread.java:123) 
08-15 14:50:33.999: E/camera(1753):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 
08-15 14:50:33.999: E/camera(1753):  at android.os.Handler.dispatchMessage(Handler.java:99) 
08-15 14:50:33.999: E/camera(1753):  at android.os.Looper.loop(Looper.java:137) 
08-15 14:50:33.999: E/camera(1753):  at android.app.ActivityThread.main(ActivityThread.java:4424) 
08-15 14:50:33.999: E/camera(1753):  at java.lang.reflect.Method.invokeNative(Native Method) 
08-15 14:50:33.999: E/camera(1753):  at java.lang.reflect.Method.invoke(Method.java:511) 
08-15 14:50:33.999: E/camera(1753):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
08-15 14:50:33.999: E/camera(1753):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
08-15 14:50:33.999: E/camera(1753):  at dalvik.system.NativeStart.main(Native Method) 

編輯：問題重啓仿真器和壓倒一切的後，部分解決了210方法：

@Override 
    protected void onPause() { 
     super.onPause(); 
     if(camera != null) 
      camera.release(); 
    } 

Answer 1

不知道這是否是問題，但要確保你release當你的活動中去後臺相機每次。