我希望我的recyclerview通過條件顯示有限的卡片，但所有專案都繼續顯示

我正在嘗試顯示未完成的作業的 Recyclerview 串列 (!isJob_finished())，但每個專案似乎都顯示在 recyclerview 卡串列中。我如何使它在作業未完成時不顯示在 recyclerview 串列中？

我的配接器配接器

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder>{
//Make a context and iterable datalist variable
Context context;
ArrayList<JobModel> userArrayList;

//Constructor
public MyAdapter(Context context, ArrayList<JobModel> userArrayList) {
    this.context = context;
    this.userArrayList = userArrayList;
}

@NonNull
@Override
public MyAdapter.MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    //Here is where you attach your item layout ie: job_openings_list
    View v = LayoutInflater.from(context).inflate(R.layout.job_openings_list,parent,false);
    return new MyViewHolder(v);
}

@Override
public void onBindViewHolder(@NonNull MyAdapter.MyViewHolder holder, int position) {
    //Instantiate your model class to hold the data of the model ur simulating
    JobModel job = userArrayList.get(position);

    //Based on the widgets u used on myViewHolder
    if(job.isJob_finished()==false){
        holder.tv_provided_title.setText(job.getJob_title());
        holder.tv_provided_payout.setText(job.getJob_payout());
        holder.tv_provided_id.setText(job.getJob_ID());

        //OnClickers redirect to intent
        holder.tv_provided_title.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) { ToDescription(v, job); }
        });
        holder.tv_provided_payout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) { ToDescription(v, job); }
        });
        holder.tv_provided_id.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) { ToDescription(v, job); }
        });
    }else{

    }

}

private void ToDescription(View v, JobModel job) {
    Intent i = new Intent(v.getContext(), JobDescription.class);
    i.putExtra("job_id",job.getJob_ID());
    context.startActivity(i);
}

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

public static class MyViewHolder extends RecyclerView.ViewHolder{
    //Here in scope instantiate the widgets used based on your item layout
    TextView tv_provided_title,tv_provided_payout, tv_provided_id;

    public MyViewHolder(@NonNull @NotNull View itemView) {
        super(itemView);
        //find the widgets
        tv_provided_title = itemView.findViewById(R.id.tv_provided_title);
        tv_provided_payout = itemView.findViewById(R.id.tv_provided_payout);
        tv_provided_id = itemView.findViewById(R.id.tv_provided_id);
    }
}

}

我與配接器一起使用的我的模型模型

public class JobModel {
private String Job_title;
private String Job_ID;
private String Job_payout;
private Boolean Job_finished = false;

private JobModel(){
}

public JobModel(String job_title, String job_ID, String job_payout) {
    Job_title = job_title;
    Job_ID = job_ID;
    Job_payout = job_payout;
}

public Boolean isJob_finished() { return Job_finished; }

public void setFinished(Boolean finished) { this.Job_finished = finished; }

public String getJob_title() {
    return Job_title;
}

public void setJob_title(String job_title) {
    Job_title = job_title;
}

public String getJob_ID() {
    return Job_ID;
}

public void setJob_ID(String job_ID) {
    Job_ID = job_ID;
}

public String getJob_payout() {
    return Job_payout;
}

public void setJob_payout(String job_payout) {
    Job_payout = job_payout;
}

}

我使用的代碼是 JAVA

uj5u.com熱心網友回復：

RecyclerViewis a View, 用于顯示傳遞的資料（在這種情況下：使用配接器）。您應該將已經過濾的串列傳遞給配接器，而不是包含所有作業的整個陣列。那是最簡單的方法

另一種更靈活的方法是在配接器中實作Filterable并使用過濾，如果在開始時應該只有未完成的作業，那么只需在配接器建構式的開頭設定過濾器。您還可以引入一些開關/切換 GUI 元素來隱藏/顯示已完成的作業（例如在ActionBar/ 上Toolbar）

標籤：爪哇 安卓 安卓工作室 android-recyclerview 安卓适配器

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