我在StackOverflow上搜索了各种答案，但无法找到附近的内容。我知道如何刷新片段，但我不知道如何刷新片段布局中的实际片段。我有一个活动，我已经实现了tablayout与viewpager。我在tablayout的一个片段中有recyclerview。在该回收站视图中，我有一个重新加载页面的按钮。但问题是我重新加载完整的活动，我看到第一个标签。而recyclerview片段在第二个标签中。那么我如何从recyclerview重新加载片段并且不要让完整的活动刷新。如果我刷新完整活动，则再次在前面屏幕上看到第一个布局，并且用户必须再次滑动到第二个标签，这不是优选的。继承我的第二个标签片段的recylerview适配器代码：
public class Recieved_Reviews_adapter extends RecyclerView.Adapter<Recieved_Reviews_adapter.ViewHolder>
{
Context context;
ArrayList<reviews_model> arraylist_reviews_models;
public Recieved_Reviews_adapter(Context context, ArrayList<reviews_model> reviews_models) {
this.context=context;
this.arraylist_reviews_models = reviews_models;
}
@Override
public Recieved_Reviews_adapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.cardview__recieved_reviews, viewGroup, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(final Recieved_Reviews_adapter.ViewHolder viewHolder, int i) {
viewHolder.imageView.setImageResource(arraylist_reviews_models.get(i).getReview_images());
viewHolder.reviewers_name.setText(" "+ arraylist_reviews_models.get(i).getReviewer_name());
viewHolder.reviews.setText("\" "+ arraylist_reviews_models.get(i).getReviews()+"\"");
viewHolder.reviews_ratingbar.setRating(arraylist_reviews_models.get(i).getReviews_rating());
viewHolder.img_btn_reply.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
viewHolder.img_btn_reply.setVisibility(View.GONE);
EditText et_reply= new EditText(context);
et_reply.setHint("Reply");
Button btn_sumbit= new Button(context);
btn_sumbit.setText("Submit");
btn_sumbit.setGravity(Gravity.CENTER);
btn_sumbit.setBackgroundColor(context.getResources().getColor(R.color.colorPrimary));
btn_sumbit.setTextColor(context.getResources().getColor(R.color.TextColorWhite));
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(120, 40);
params.setMargins(20, 20, 20, 20);
params.gravity=Gravity.CENTER;
btn_sumbit.setLayoutParams(params);
et_reply.setGravity(Gravity.CENTER);
viewHolder.linearLayout_received_reviews.addView(et_reply,viewHolder.linearLayout_received_reviews.getChildCount());
viewHolder.linearLayout_received_reviews.addView(btn_sumbit);
btn_sumbit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//Refreshing base activity rather
((Reviews)context).finish();
context.startActivity(((Reviews)context).getIntent());
});
}
@Override
public int getItemCount() {
return arraylist_reviews_models.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
CircleImageView imageView;
RatingBar reviews_ratingbar;
TextView reviewers_name;
TextView reviews;
LinearLayout linearLayout_received_reviews;
ImageButton img_btn_reply;
Button submit;
public ViewHolder(View view) {
super(view);
imageView=(CircleImageView) view.findViewById(R.id.img_review);
imageView.setBorderColor(context.getResources().getColor(R.color.darkgrey));
reviews_ratingbar=(RatingBar)view.findViewById(R.id.ratingbar_reviews);
reviewers_name=(TextView)view.findViewById(R.id.tv_reviewer_name);
reviews=(TextView) view.findViewById(R.id.tv_the_reviews);
img_btn_reply =(ImageButton)view.findViewById(R.id.img_btn_received_review_reply);
linearLayout_received_reviews=(LinearLayout)view.findViewById(R.id.linear_layout_recieved_reviews);
}
}
}
继承我的活动代码：
public class Reviews extends AppCompatActivity {
ViewPager simpleViewPager;
TabLayout tabLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_reviews);
init();
listener();
}
private void init() {
//this method initializes all the views
simpleViewPager = (ViewPager) findViewById(R.id.simpleViewPager);
tabLayout = (TabLayout) findViewById(R.id.simpleTabLayout);
TabLayout.Tab firstTab = tabLayout.newTab();
firstTab.setText("Given");
TabLayout.Tab secondTab = tabLayout.newTab();
secondTab.setText("Recieved");
tabLayout.addTab(firstTab);
tabLayout.addTab(secondTab);
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
PagerAdapter adapter = new PagerAdapter(getSupportFragmentManager(), tabLayout.getTabCount());
simpleViewPager.setAdapter(adapter);
simpleViewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
}
private void listener() {
//this method sets onclick on tab
tabLayout.addOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(simpleViewPager));
}
继续我的viewpapt / tablayout的页面扩展：
public class PagerAdapter extends FragmentStatePagerAdapter {
int mNumOfTabs;
public PagerAdapter(FragmentManager fm, int NumOfTabs) {
super(fm);
this.mNumOfTabs = NumOfTabs;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
Given_reviews tab1 = new Given_reviews();
return tab1;
case 1:
Received_reviews tab2 = new Received_reviews();
return tab2;
default:
return null;
}
}
@Override
public int getCount() {
return mNumOfTabs;
}
}public class PagerAdapter extends FragmentStatePagerAdapter {
int mNumOfTabs;
public PagerAdapter(FragmentManager fm, int NumOfTabs) {
super(fm);
this.mNumOfTabs = NumOfTabs;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
Given_reviews tab1 = new Given_reviews();
return tab1;
case 1:
Received_reviews tab2 = new Received_reviews();
return tab2;
default:
return null;
}
}
@Override
public int getCount() {
return mNumOfTabs;
}
}
答案 0 :(得分：0)
在您的情况下，您需要做的就是响应按钮点击Recyclerview项目进行API调用。收到服务器的回复后更新，然后致电adapter.notifyItemChanged(itemPositionInAdapter)。
您不需要重新创建活动/片段。
答案 1 :(得分：0)
不要把这个作为答案，而是对你的问题提出一个暗示性评论（因为我还不能评论）。如果我理解正确您希望在单击按钮时刷新布局，为什么不使用滑动刷新布局并覆盖onRefresh方法，在此方法中，您可以执行API调用和notifyDataSetChanged（）。