在自定义相机布局中以水平视图设置图像

时间:2017-09-01 11:21:10

标签: android android-recyclerview

PS:这是之前提出的问题的更新。

我有一个自定义相机布局,我需要在单击时将图像设置为水平。我尝试使用recyclerview。 首先,单击的图像存储在名为 result 的位图中。

然后,我将图像的路径存储在名为 path 的变量中。 path变量通过bundle传递给RecycleViewAdapter。

然后,使用onBindViewHolder,我试图在水平视图中显示图像。

        button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            camera.setCameraListener(new CameraListener() {
                @Override
                public void onPictureTaken(byte[] picture) {
                    super.onPictureTaken(picture);
                         Bitmap result = 
   BitmapFactory.decodeByteArray(picture, 0, picture.length);

                         ByteArrayOutputStream bytes = new ByteArrayOutputStream();
                         result.compress(Bitmap.CompressFormat.JPEG, 25, bytes);

                         String path = MediaStore.Images.Media.insertImage(getApplicationContext().getContentResolver(), result, "Title", null);
                    horizontalList.add(path);
                         recycleViewAdapter = new RecycleViewAdapter(horizontalList);
                         horizontal_rv.setAdapter(recycleViewAdapter);
                         recycleViewAdapter.notifyDataSetChanged();
                    mBundle = new Bundle();
                    CameraActivity.mBundle.putString("abc", path);
                    horizontalList.add(path);
                }
            });
            camera.captureImage();

        }
    });

然后传递给适配器类。

    public class RecycleViewAdapter extends RecyclerView.Adapter<RecycleViewAdapter.MyViewHolder> {
Uri uri;
String path;
private List<Bitmap> horizontalList;
public class MyViewHolder extends RecyclerView.ViewHolder {
    public ImageView image_result;

    public MyViewHolder(View view) {
        super(view);
        image_result = (ImageView) view.findViewById(R.id.image_result);

    }
}

public RecycleViewAdapter(ArrayList<Bitmap> horizontalList) {
    this.horizontalList = horizontalList;
}

@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.recyclerview_item_row, parent, false);

    return new MyViewHolder(itemView);
}

@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
     path= CameraActivity.mBundle.getString("abc");
    uri=Uri.parse(path);
    holder.image_result.setImageURI(uri);


    holder.image_result.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
        }
    });
}


@Override
public int getItemCount() {
    return horizontalList.size();
}
}

问题: 单击图像时,每次单击时,图像中将显示2个副本。之前的观点发生了变化,显示了新的图像,使计数翻倍。 此外,应用在最多3次点击后崩溃。

截图是: enter image description here

请帮忙。

1 个答案:

答案 0 :(得分:1)

//I assume you are looping here
Bitmap result = BitmapFactory.decodeByteArray(picture, 0, picture.length);

                    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
                    result.compress(Bitmap.CompressFormat.JPEG, 100, bytes);

                    String path = MediaStore.Images.Media.insertImage(getApplicationContext().getContentResolver(), result, "Title", null);

                    CameraActivity.mBundle.putString("abc",path);
                    horizontalList.add(result);
                   // finish loop....................
//notify the adapter of data changes
recycleViewAdapter.notifyDataSetChanged();

在循环内创建新适配器意味着只能显示单个项目,同时效率低下。循环并在循环中添加元素,并在循环之后,通知适配器数据更改。