相关疑难解决方法(0)

在开发相机应用程序时,我遇到了一个异常,只有当我切换到其他应用程序(onPause()对于我的应用程序)时才会发生.

01-15 17:22:15.017: E/AndroidRuntime(14336): FATAL EXCEPTION: main
01-15 17:22:15.017: E/AndroidRuntime(14336): java.lang.RuntimeException: Method called after release()
01-15 17:22:15.017: E/AndroidRuntime(14336):    at android.hardware.Camera.setPreviewDisplay(Native Method)
01-15 17:22:15.017: E/AndroidRuntime(14336):    at android.hardware.Camera.setPreviewDisplay(Camera.java:357)
01-15 17:22:15.017: E/AndroidRuntime(14336):    at com.sora.cbir.yuki.image.leaf.CameraPreview.surfaceCreated(CameraPreview.java:32)
01-15 17:22:15.017: E/AndroidRuntime(14336):    at android.view.SurfaceView.updateWindow(SurfaceView.java:551)
01-15 17:22:15.017: E/AndroidRuntime(14336):    at android.view.SurfaceView.onWindowVisibilityChanged(SurfaceView.java:213)
01-15 17:22:15.017: E/AndroidRuntime(14336):    at android.view.View.dispatchWindowVisibilityChanged(View.java:4075)
01-15 17:22:15.017: E/AndroidRuntime(14336):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:742)
01-15 17:22:15.017: E/AndroidRuntime(14336):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:742)
01-15 17:22:15.017: E/AndroidRuntime(14336):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:742)
01-15 17:22:15.017: E/AndroidRuntime(14336):    at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:742)
01-15 17:22:15.017: E/AndroidRuntime(14336):    at android.view.ViewRoot.performTraversals(ViewRoot.java:858)
01-15 17:22:15.017: E/AndroidRuntime(14336):    at android.view.ViewRoot.handleMessage(ViewRoot.java:1995)
01-15 17:22:15.017: …

1. 如果我不使用 mCamera.release(); 在surfaceDestroyed(....)然后无法再从另一个Activity启动CameraActivity [简短得到不幸的应用程序已经停止 ]错误,甚至没有释放相机,但如果我点击主页按钮 [ 来自CameraActivity ],然后再次启动我的应用程序,没有收到任何错误(在短期工作正常,并打开CameraActivity没有任何问题)

2. 如果我使用*mCamera.release(); *在surfaceDestroyed(....)然后能够再次从另一个Activity启动CameraActivity并释放相机,但当我点击主页按钮,然后再次启动我的应用程序,得到不幸的应用程序已停止 ....:

但是我想要两个一起工作(首先,从CameraActivity点击Home,再次从CameraActivity启动应用程序 - 没有任何错误)和(第二,从另一个活动启动相机 - 没有任何错误)

就像我写的那样,这两件事都适合我,但不是一起.....

第33行是:

        Camera.Parameters parameters = mCamera.getParameters();

完整日志:

12-30 12:18:58.070: W/dalvikvm(14822): threadid=1: thread exiting with uncaught exception (group=0x41ef72a0)
12-30 12:18:58.080: E/AndroidRuntime(14822): FATAL EXCEPTION: main
12-30 12:18:58.080: E/AndroidRuntime(14822): java.lang.RuntimeException: Method called after release()
12-30 12:18:58.080: E/AndroidRuntime(14822):    at android.hardware.Camera.native_getParameters(Native Method)
12-30 12:18:58.080: …

释放相机对象“ java.lang.RuntimeException：释放后调用的方法”时出现异常

以下是我的代码和异常堆栈跟踪。

if (camera != null) {
     camera.stopPreview();               
     camera.release();
     camera = null;
}

异常堆栈跟踪-

java.lang.RuntimeException: Method called after release()
Thread[main,5,main] android.hardware.Camera._stopPreview(Native Method)
android.hardware.Camera.stopPreview(Camera.java:626)
com.s5.selfiemonkey1.activity.Preview.surfaceDestroyed(Preview.java:152)
android.view.SurfaceView.updateWindow(SurfaceView.java:601)
android.view.SurfaceView.access$000(SurfaceView.java:88)
android.view.SurfaceView$3.onPreDraw(SurfaceView.java:183)
android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:680)
android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2123)
android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1139)
android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4872)
android.view.Choreographer$CallbackRecord.run(Choreographer.java:776)
android.view.Choreographer.doCallbacks(Choreographer.java:579)
android.view.Choreographer.doFrame(Choreographer.java:548)
android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:762)
android.os.Handler.handleCallback(Handler.java:800)
android.os.Handler.dispatchMessage(Handler.java:100)
android.os.Looper.loop(Looper.java:194)
android.app.ActivityThread.main(ActivityThread.java:5371)
java.lang.reflect.Method.invokeNative(Native Method)
java.lang.reflect.Method.invoke(Method.java:525)
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)

看起来好像在释放的对象上调用了stopPreview（）。