在没有互联网连接并尝试使用相机的情况下运行时，在Android模拟器中获取错误和崩溃

Question

在我的应用中（在模拟器中运行），我没有使用任何互联网连接（并且甚至没有获得许可），但是收到错误（搜索谷歌声称是因为没有发布互联网资源）：

A resource was acquired at attached stack trace but never released. See java.io.Closeable for information on avoiding resource leaks.     java.lang.Throwable: Explicit termination method 'close' not called

我的代码很简单：

public void onResume() {
    super.onResume();
    if ( Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) mCamera = Camera.open(0);
    else mCamera = Camera.open();
}

public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.fragment_crime_camera, container, false);

    //Hide progress first
    mProgressContainer = (View)v.findViewById(R.id.crime_camera_progressContainer);
    mProgressContainer.setVisibility(View.INVISIBLE);

    Button takePicture = (Button)v.findViewById(R.id.crime_camera_takePictureButton);
    takePicture.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if ( mCamera != null) mCamera.takePicture(mShutterCallback, null,mPictureCallback );
        }
    });

    mSurfaceView = (SurfaceView)v.findViewById(R.id.crime_camera_surfaceView);
    final SurfaceHolder holder = mSurfaceView.getHolder();

    //Required only for pre-s.0 devices
    holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

    holder.addCallback(new SurfaceHolder.Callback() {
        @Override
        public void surfaceCreated(SurfaceHolder surfaceHolder) {
            try
            {
                //Tell camera this is where to draw preview
                if ( mCamera != null) mCamera.setPreviewDisplay(holder);
            }
            catch (IOException e)
            {
                Log.e(TAG, "Error setting up preview display", e);
            }
        }

        @Override
        public void surfaceChanged(SurfaceHolder surfaceHolder, int format, int w, int h) {
            if (mCamera == null ) return;

            //Surface changed size, need to tell camera
            Camera.Parameters parameters = mCamera.getParameters();
            Camera.Size s = getBestSupportedSize( parameters.getSupportedPreviewSizes(), w, h );
            parameters.setPreviewSize(s.width, s.height);

            //Saving picture size
            s = getBestSupportedSize(parameters.getSupportedPictureSizes(), w, h);
            parameters.setPictureSize(s.width, s.height);

            //Tell camera the params
            mCamera.setParameters(parameters);

            try
            {
                mCamera.startPreview();
            }
            catch (Exception e)
            {
                Log.e(TAG, "Could not start preview", e);
                mCamera.release();
                mCamera = null;
            }
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
            if (mCamera != null) mCamera.stopPreview();
        }
    });

    return v;
}

在绘制片段时崩溃。为什么会这样？我如何解决它？ （将我的计算机连接到互联网修复了错误，但我需要能够在没有互联网连接的情况下编程/运行emuator。）

Answer 1

您可以关注屏幕短片

1.打开Android虚拟设备管理器

2.编辑您的Android模拟器

3.设置Back Camera =（Emulated）如屏幕短显示。 4. cammera看起来像这样。 我希望它能帮助你摆脱这个问题

Answer 2

将此内容包含在AndroidManifest文件中

<uses-permission android:name="android.permission.CAMERA" />
 <uses-feature android:name="android.hardware.camera" />
 <uses-feature android:name="android.hardware.camera.autofocus" />

另外，请将相机与stoppreview一起发布。您的错误主要是因为您尚未释放资源。