Question

我正在尝试实现要在虚拟/ POC RecyclerView应用程序上使用的自定义RecyclerView.Adaper。我正在使用this教程。我的模型称为Movie，其中有两个字段：

@NonNull
@PrimaryKey
private String name;

@NonNull
private Integer releaseYear;

所以我有这堂课

MovieAdapter extends RecyclerView.Adapter<MovieAdapter.MyViewHolder>

覆盖onCreateViewHolder，onBindViewHolder和getItemCount并定义MyViewHolder extends RecyclerView.ViewHolder。

当调试行位于onBindViewHolder的最后一行时：

// Involves populating data into the item through holder
@Override
public void onBindViewHolder(@NonNull MyViewHolder viewHolder, int position) {
    // Get the data model based on position
    Movie movie = movies.get(position);

    // Set item views based on your views and data model
    TextView tvMovieName = viewHolder.tvMovieName;
    tvMovieName.setText(movie.getName());

    TextView tvMovieReleaseYear = viewHolder.tvMovieReleaseYear;
    tvMovieReleaseYear.setText(movie.getReleaseYear());
}

我知道

Process: br.com.basicfeatures, PID: 2555
android.content.res.Resources$NotFoundException: String resource ID #0x7cf
    at android.content.res.Resources.getText(Resources.java:348)
    at android.widget.TextView.setText(TextView.java:5831)
    at br.com.basicfeatures.presentation.adapter.MovieAdapter.onBindViewHolder(MovieAdapter.java:45)
    at br.com.basicfeatures.presentation.adapter.MovieAdapter.onBindViewHolder(MovieAdapter.java:15)

这是MyViewHolder：

protected class MyViewHolder extends RecyclerView.ViewHolder {
    private TextView tvMovieName;
    private TextView tvMovieReleaseYear;

    private MyViewHolder(@NonNull View itemView) {
        super(itemView);
        this.tvMovieName = itemView.findViewById(R.id.id_tv_movie_name);
        this.tvMovieReleaseYear = itemView.findViewById(R.id.id_tv_movie_release_year);
    }
}

Answer 1

这是因为movie.getReleaseYear()返回一个整数，所以tvMovieReleaseYear.setText试图查找不存在的相应资源文件。因此，您需要将movie.getReleaseYear()转换为字符串

tvMovieReleaseYear.setText(movie.getReleaseYear() + "");

Answer 2

将movie.getReleaseYear()的值转换为String。

 tvMovieReleaseYear.setText(String.valueOf(movie.getReleaseYear()));

为什么需要？

TextView中只有2个方法在setText()中采用整数，并且都期望StringRes。因此，当您尝试设置整数时，它假定您正在尝试从String资源中设置一个字符串。

因此，要使用setText()设置整数，您需要以任何方式将其转换为字符串。

下面是我上面提到的两种方法

/**
5821     * Sets the text to be displayed using a string resource identifier.
5822     *
5823     * @param resid the resource identifier of the string resource to be displayed
5824     *
5825     * @see #setText(CharSequence)
5826     *
5827     * @attr ref android.R.styleable#TextView_text
5828     */
5829    @android.view.RemotableViewMethod
5830    public final void setText(@StringRes int resid) {
5831        setText(getContext().getResources().getText(resid));
5832        mTextSetFromXmlOrResourceId = true;
5833        mTextId = resid;
5834    }
5835
5836    /**
5837     * Sets the text to be displayed using a string resource identifier and the
5838     * {@link android.widget.TextView.BufferType}.
5839     * <p/>
5840     * When required, TextView will use {@link android.text.Spannable.Factory} to create final or
5841     * intermediate {@link Spannable Spannables}. Likewise it will use
5842     * {@link android.text.Editable.Factory} to create final or intermediate
5843     * {@link Editable Editables}.
5844     *
5845     * @param resid the resource identifier of the string resource to be displayed
5846     * @param type a {@link android.widget.TextView.BufferType} which defines whether the text is
5847     *              stored as a static text, styleable/spannable text, or editable text
5848     *
5849     * @see #setText(int)
5850     * @see #setText(CharSequence)
5851     * @see android.widget.TextView.BufferType
5852     * @see #setSpannableFactory(Spannable.Factory)
5853     * @see #setEditableFactory(Editable.Factory)
5854     *
5855     * @attr ref android.R.styleable#TextView_text
5856     * @attr ref android.R.styleable#TextView_bufferType
5857     */
5858    public final void setText(@StringRes int resid, BufferType type) {
5859        setText(getContext().getResources().getText(resid), type);
5860        mTextSetFromXmlOrResourceId = true;
5861        mTextId = resid;
5862    }

使用RecyclerView在setText上onBindViewHolder崩溃

2 个答案: