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我有一个应用程序，我在onResume()方法中打开相机：

@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);
        }
    }

如果我不在方法中调用 openCamera() 方法，它可以正常工作onResume()，但在onResume()方法中它给了我以下异常：

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)

编辑：重新启动模拟器和覆盖onPause()方法后问题部分解决：

@Override
    protected void onPause() {
        super.onPause();
        if(camera != null)
            camera.release();
    }
4

1 回答 1

1

不确定这是否是问题所在，但release每次当您的活动进入后台时，请确保您使用相机。

于 2012-08-15T09:07:51.227 回答