android - 来自 cwac-camera 的回调

Question

我正在尝试实现出色的库 cwac-camera。怎么实现图片的回调，怎么设置图片的路径，我好像想不通。

这是我的 CustomCameraFragment公共(public)类 CustomCameraFragment 扩展 CameraFragment { private static final String KEY_USE_FFC = "com.commonsware.cwac.camera.demo.USE_FFC";

public static CustomCameraFragment newInstance(boolean useFFC) {
    CustomCameraFragment f = new CustomCameraFragment();
    Bundle args = new Bundle();

    args.putBoolean(KEY_USE_FFC, useFFC);
    f.setArguments(args);
    return (f);
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    SimpleCameraHost.Builder builder =
            new SimpleCameraHost.Builder(new DemoCameraHost(getActivity()));
    builder.useFullBleedPreview(true);
    setHost(builder.build());
    //setHost(builder.useFullBleedPreview(true).build());
}

public class DemoCameraHost extends SimpleCameraHost {
    public DemoCameraHost(Context _ctxt) {
        super(_ctxt);
    }

    @Override
    public boolean useFrontFacingCamera() {
        if (getArguments() == null) {
            return (false);
        }

        return (getArguments().getBoolean(KEY_USE_FFC));
    }

    @Override
    public boolean useSingleShotMode() {
        return true;
    }

    @Override
    public void onCameraFail(CameraHost.FailureReason reason) {
        super.onCameraFail(reason);

        Toast.makeText(getActivity(),
                "Sorry, but you cannot use the camera now!",
                Toast.LENGTH_LONG).show();
    }

    @Override
    public void saveImage(PictureTransaction xact, Bitmap bitmap) {
        super.saveImage(xact, bitmap);
    }
}

我在另一个 fragment 的框架布局中使用它，但我无法弄清楚回调的正确实现。

我使用 CustomCameraFragment 的 fragment :我有一个拍照按钮:@OnClick(R.id.btnTakePicture) public void takePicture(查看 View ){

    try {
        CustomCameraFragment.DemoCameraHost demoCameraHost = customCameraFragment.demoCameraHost;
        PictureTransaction pictureTransaction = new PictureTransaction(demoCameraHost);
        pictureTransaction.needBitmap(true);
        customCameraFragment.takePicture(pictureTransaction);

    } catch (Exception e) {
        e.printStackTrace();
    }

    showCameraPreview(false);

}

但是在这个 fragment 中我需要:- 回调以了解照片的拍摄时间- 当触发回调时，我需要显示位图，而不是预览- 我需要能够设置保存图片的路径和文件名

我不清楚这 3 件事。

Answer 1

您必须覆盖 saveImage(PictureTransaction, byte[]) 函数，有关更多信息，请参见此处:

https://github.com/commonsguy/cwac-camera#overriding-photo-saving