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我正在创建一个应用程序，该应用程序具有自己使用相机预览构建的相机。它在我的Android 4.1设备上运行良好（相机打开并拍照）。但是当我在我的 Android 2.3 设备上尝试时，应用程序崩溃了，framelayout.addView(camera_view)因为当我评论这一行时，应用程序没有崩溃。这是我的代码（这些措施只是为了适应设备屏幕）：

private void setUpCamera() {

    camera_view = new CameraSurfaceView(getApplicationContext());

    frame_layout = (FrameLayout) findViewById(R.id.image_frame);

    // v it's a square that I draw
    v.getLayoutParams().width = (int) ((720/4) + (5*screenDensity));
    v.getLayoutParams().height = (int) ((720/4) + (5*screenDensity));

    // img it's the imageview where I display the photo
    img.getLayoutParams().width = (int) (720/4);
    img.getLayoutParams().height = (int) (720/4);

    frame_layout.getLayoutParams().width = (int) (720/4);
    frame_layout.getLayoutParams().height = (int) (960/4);

    frame_layout.addView(camera_view);

}

这是 camera_view 类：

public class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback{

    private SurfaceHolder m_holder;
    public Camera camera = null;

    public CameraSurfaceView(Context context) {

        super(context);
        m_holder = getHolder();
        m_holder.addCallback(this);

    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

        Camera.Parameters params = camera.getParameters();

        if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
            camera.setDisplayOrientation(90);
        } else {
            camera.setDisplayOrientation(0);
        }

        params.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
        params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
        params.setSceneMode(Camera.Parameters.SCENE_MODE_AUTO);
        params.setWhiteBalance(Camera.Parameters.WHITE_BALANCE_AUTO);
        params.setExposureCompensation(0);
        params.setJpegQuality(100);

        List<Size> sizes = params.getSupportedPictureSizes();
        Camera.Size size = sizes.get(0);
        for(int i=0;i<sizes.size();i++)
        {
            if(sizes.get(i).width > size.width)
               size = sizes.get(i);
        }

        params.setPreviewSize(size.width, size.height);
        params.setPictureSize(size.width, size.height);

        camera.setParameters(params);
        camera.startPreview();

    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {

        camera = Camera.open();

        try {
            camera.setPreviewDisplay(m_holder);
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {

        camera.stopPreview();
        camera.release();
        camera = null;

    }

    public void capture(Camera.PictureCallback jpeghandler){

        camera.takePicture(null, null, jpeghandler);

    }

}
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