Question

我的活动中有recyclerview，并将其与自定义布局绑定。我在textview上有点击监听器。当我点击textview时，我正在改变textview的颜色。

我的问题是，当我点击第一个textview时，它也会改变第13个textview的颜色。我想要多个项目选择。

这是我的代码

Recyclerview

<android.support.v7.widget.RecyclerView
    android:id="@+id/recycler_view_test_QNo"
    android:layout_width="match_parent"
    android:layout_height="58dp"
    android:layout_marginLeft="7dp"
    android:layout_marginRight="7dp"
    android:layout_marginTop="7dp"

    android:background="@color/unVisited" />

自定义适配器

public class TestAdapter extends RecyclerView.Adapter<TestAdapter.viewHolder> {

private ArrayList<String> questionNo;

Context _context;
public TestAdapter(Context context, ArrayList<String> questionNo){
    _context=context;
    this.questionNo = questionNo;
    this._callback=callback;
}

@Override
public viewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    @SuppressLint("InflateParams") View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.custom_test,null);
    return new viewHolder(view);
}

@Override
public void onBindViewHolder(final viewHolder holder, int position) {

    holder.textView.setText(questionNo.get(position));

}

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

class viewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{

    TextView textView;

    viewHolder(View itemView) {
        super(itemView);
        textView = itemView.findViewById(R.id.tv_QuesNo_custom);
        textView.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        textView.setTextColor(Color.RED);
    }
}
}

custom_test.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">

<TextView
    android:id="@+id/tv_QuesNo_custom"
    android:layout_width="42dp"
    android:layout_height="wrap_content"
    android:layout_margin="5dp"
    android:layout_marginRight="50dp"

    android:gravity="center"
    android:textSize="30sp"
     />
</LinearLayout>

Answer 1

首先初始化整数selectedPosition = -1;

然后在onBindViewHolder

public void onBindViewHolder(final ViewHolder holder, final int position) {
        holder.textView.setText(questionNo.get(position));

        holder.textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                selectedPosition = position;
                notifyDataSetChanged();
            }
        });
        if(selectedPosition == position){
            holder.textView.setTextColor(Color.parseColor("#FF0000"));
        }
        else
        {
            //You can set your color
        }

    }

Recyclerview在更改其他textview的颜色时更改textview颜色

1 个答案: