Question

在我的应用程序中，我使用RecaylerView小部件开发了一个新闻功能。现在我想把这个recyclerView的CoverImage和Date传递给详细的新闻页面。我可以成功通过新闻日期。但封面图像未显示在详细信息页面中。我在android监视器窗口的logcat中找到了0个图像。我无法确定这里会出现什么问题。

我的模特新闻类是 -

public class NewsModel extends RealmObject {
     @PrimaryKey

    private int image;
    private String title;
    private String date;
    private String detail ;
    public NewsModel() {

    }

    public NewsModel(int image, String title, String date) {
        this.image = image;
        this.title = title;
        this.date = date;
    }
    public int getImage() {
        return image;
    }

    public void setImage(int image) {
        this.image = image;
    }

    public String getDate() {
        return date;
    }

    public void setDate(String date) {
        this.date = date;
    }
  ......

 }

我的新闻页面是

  public class NewsAdapter extends 
   RecyclerView.Adapter<NewsAdapter.NewsHolder> {

    private List<NewsModel> newsObject;
    private Context context;

    public NewsAdapter(Context context, List<NewsModel> newsObject) {
        this.context = context;
        this.newsObject=newsObject;
    }

    @Override
    public NewsHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.news_row_layout,parent,false);
        return new NewsHolder(view);
    }

    @Override
    public void onBindViewHolder(NewsAdapter.NewsHolder holder, int position) {
        final NewsModel newsModel=newsObject.get(position);

        holder.newsImage.setImageResource(newsModel.getImage());
        holder.newsHeadline.setText(newsModel.getTitle());
        holder.newsDate.setText(newsModel.getDate());
        holder.cardView.setTag(position);
        holder.cardView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int pos = (int)view.getTag();
                openDetailNews(Integer.toString(newsModel.getImage()),newsModel.getDate());
            }
        });

    }

    //open Detail News Page
    private void openDetailNews(String...details) {
        Intent i=new Intent(context,DetailNews.class);
        i.putExtra("image",details[0]);
        i.putExtra("date",details[1]);
        context.startActivity(i);
    }

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

    public class NewsHolder extends RecyclerView.ViewHolder {

        public CardView cardView;
        public ImageView newsImage;
        public TextView newsHeadline;
        public TextView newsDate;

        public NewsHolder(View itemView) {
            super(itemView);
            newsImage=(ImageView)itemView.findViewById(R.id.news_picture);
            newsHeadline=(TextView)itemView.findViewById(R.id.news_headline);
            newsDate=(TextView) itemView.findViewById(R.id.news_date);
            cardView=(CardView)itemView.findViewById(R.id.cardview_news);
        }
    }
}

我希望从新闻页面获取封面图片和日期的详细新闻页面代码是 -

    public class DetailNews extends AppCompatActivity {

    private RecyclerView recyclerView;
    private RecyclerView.Adapter adapter;
    private List<NewsImageModel> newsObject;
    ImageView _coverImage;
    TextView _description;
    TextView _newsDate;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.news_detail);

        // Showing and Enabling clicks on the Home/Up button
        if (getSupportActionBar() != null) {
            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
            getSupportActionBar().setDisplayShowHomeEnabled(true);
        }
        newsObject=getAllImageList();

        // setting up views and stuff
        setUpUIViews();

        Intent intent = getIntent();

        //RECEIVE DATA
        Log.e("_coverImage",""+_coverImage);
        Integer coverImage=intent.getExtras().getInt("image");
        Log.e("coverImage",""+coverImage);
        String newsDate=intent.getExtras().getString("date");

        //BIND DATA
        _coverImage.setImageResource(coverImage);
        Log.e("coverImage",""+coverImage);
        _newsDate.setText(newsDate);

    }

    private void setUpUIViews() {
        _coverImage=(ImageView)findViewById(R.id.news_cover);
        _description=(TextView)findViewById(R.id.news_description);
        _newsDate=(TextView)findViewById(R.id.news_date);

        recyclerView = (RecyclerView)findViewById(R.id.image_list);
        recyclerView.setHasFixedSize(true);
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(DetailNews.this);
        recyclerView.setLayoutManager(layoutManager);

        adapter = new NewsDetailAdapter(this,newsObject );
        recyclerView.setAdapter(adapter);
    }

    private List<NewsImageModel> getAllImageList() {
        List<NewsImageModel> images = new ArrayList<NewsImageModel>();

        ......

        return  images;

    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
       ...
    }
}

Answer 1

试试吧！

UserRepository

Answer 2

使用此：

public void onClick(View view) {
        int pos = (int)view.getTag();
        Intent i=new Intent(context,DetailNews.class);
        i.putExtra("image",newsModel.getImage());
        i.putExtra("date",newsModel.getDate());
        context.startActivity(i); 
        }

然后在你的活动中：

Intent intent = getIntent();
int imageId = intent.getIntExtra("image",0);

然后使用此资源ID设置您的图片

_coverImage.setImageResource(imageId);

Answer 3

您无法在图片视图中直接显示字符串网址或任何整数类型。您需要添加Image lib，如Picaso或glide。按照以下步骤：

1.添加依赖项：

compile 'com.squareup.picasso:picasso:2.5.2'

2.在您的适配器中，用旧代码替换为

Picasso.with(context).load(newsModel.getImage()).into(holder.newsImage);

你的问题将得到解决。

Answer 4

private int image;

您为图像设置了什么整数数据？它是资源图像吗？

图片未在详细活动上更新RecyclerView Android

4 个答案: