我试图找到如何从Activity
改变我RecyclerView
适配器textViews
,在我的活动我有两个小部件,如increment_text_size
和decrement_text_size
,他们必须更改适配器textviews,的Android变化的TextView TEXTSIZE从活动
为实现到,我上的活动创建简单的监听器对其进行管理:
活动:
public interface IonChangeBookContentTextSize {
void incrementTextSize();
void decrementTextSize();
}
public static void setIonChangeBookContentTextSize(IonChangeBookContentTextSize l) {
ionChangeBookContentTextSize = l;
}
和点击后W idgets我用这个监听器适配器
活动:
@OnClick(R.id.decrement_text_size)
public void decrement_text_size(View view) {
if (ionChangeBookContentTextSize != null) {
ionChangeBookContentTextSize.decrementTextSize();
}
}
@OnClick(R.id.increment_text_size)
public void increment_text_size(View view) {
if (ionChangeBookContentTextSize != null) {
ionChangeBookContentTextSize.incrementTextSize();
}
}
现在适配器我使用这个监听
public class ShowBookContentsAdapter extends RecyclerView.Adapter<ShowBookContentsAdapter.ShowBookContentsViewHolder> {
private List<Contents> list;
private Context context;
private static final int NOTE = 1;
public static IonChangeBottomViewVisibility ionChangeBottomViewvisibility;
private ShowBookContentsViewHolder holder;
private View view;
public ShowBookContentsAdapter(List<Contents> items, Context mContext, IonChangeBottomViewVisibility mOnChangeBottomViewVisibility) {
list = items;
context = mContext;
ionChangeBottomViewvisibility = mOnChangeBottomViewVisibility;
}
@Override
public ShowBookContentsViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
int layout = -1;
switch (viewType) {
case 0:
layout = R.layout.item_book_content_paragraph;
break;
case 1:
layout = R.layout.item_book_content_heading_one;
break;
}
view = LayoutInflater.from(parent.getContext()).inflate(layout, parent, false);
holder = new ShowBookContentsViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(ShowBookContentsViewHolder holder, final int position) {
switch (list.get(position).getContentType()) {
case 0:
implementingHeadingParagraphView(holder, position);
break;
case 1:
implementingHeadingOneView(holder, position);
break;
}
}
private void implementingHeadingParagraphView(final ShowBookContentsViewHolder holder, final int position) {
Utils.overrideFonts(context, holder.book_content_paragraph, PersianFontType.SHABNAM);
holder.book_content_paragraph.setText(Html.fromHtml(list.get(position).getContent()));
ActivityShowBookContent.setIonChangeBookContentTextSize(new ActivityShowBookContent.IonChangeBookContentTextSize() {
@Override
public void incrementTextSize() {
holder.book_content_paragraph.setTextSize(TypedValue.COMPLEX_UNIT_SP, 18);
}
@Override
public void decrementTextSize() {
holder.book_content_paragraph.setTextSize(TypedValue.COMPLEX_UNIT_SP, 12);
}
});
}
@Override
public int getItemViewType(int position) {
return list.get(position).getContentType();
}
@Override
public int getItemCount() {
return list.size();
}
public int getItemPosition(int itemId) {
return itemPositions.get(itemId);
}
public class ShowBookContentsViewHolder extends RecyclerView.ViewHolder {
@Nullable
@BindView(R.id.book_content_paragraph)
TextView book_content_paragraph;
@Nullable
@BindView(R.id.book_content_heading_one)
TextView book_content_heading_one;
public ShowBookContentsViewHolder(View view) {
super(view);
ButterKnife.bind(this, view);
}
}
}
实现这个监听器:
ActivityShowBookContent.setIonChangeBookContentTextSize(new ActivityShowBookContent.IonChangeBookContentTextSize() {
@Override
public void incrementTextSize() {
holder.book_content_paragraph.setTextSize(TypedValue.COMPLEX_UNIT_SP, 18);
}
@Override
public void decrementTextSize() {
holder.book_content_paragraph.setTextSize(TypedValue.COMPLEX_UNIT_SP, 12);
}
});
上implementingHeadingParagraphView
方法工作的当前位置,而不是为recyclerview适配器上的所有行,我怎么能解决这个问题?
你必须保存在数据模型类TEXTSIZE在点击的位置,然后执行你的意见时,只需使用NotifyItemChanged() –
并设置文字大小,从数据模型。 – faranjit
@faranjit'notifyItemChanged'只适用于当前位置并非所有适配器行 –