Question

我创建了一个带有自定义适配器的微调器，其中我有一个图像视图和一个文本视图，当我从微调器中选择项目然后我显示图像与所选项目工作完全正常。

问题：

但问题是，当我选择任何项目时，它会在下拉列表中显示所选项目的图像。并在spinner中显示相同的（图像和文本）..

我想要什么

我想在

中只显示没有图片的微调器中的文字

图像它在旋转器中显示带有文本的图像...我不想要这个

以下是我正在使用的代码，请向我建议解决方案谢谢

public class SpinnerAdapter extends ArrayAdapter<SpinnerItem> {
    private Context mContext;
    private ArrayList<SpinnerItem> listState;

    public SpinnerAdapter(Context context, int resource,
            ArrayList<SpinnerItem> objects) {
        super(context, resource, objects);
        this.mContext = context;
        this.listState = objects;
    }

    @Override
    public View getDropDownView(int position, View convertView, ViewGroup parent) {
        return getCustomView(position, convertView, parent);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        return getCustomView(position, convertView, parent);
    }

    @SuppressLint("InflateParams")
    public View getCustomView(int position, View convertView, ViewGroup parent) {
        final ViewHolder holder;
        if (convertView == null) {
            LayoutInflater layoutInflator = LayoutInflater.from(mContext);
            convertView = layoutInflator.inflate(R.layout.spinner_item_layout,
                    null);
            holder = new ViewHolder();
            holder.mTextView = (TextView) convertView.findViewById(R.id.text);
            holder.mCheckedImage = (ImageView) convertView
                    .findViewById(R.id.checkbox);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.mTextView.setText(listState.get(position).getTitle());

        if (listState.get(position).isSelected()) {
            holder.mCheckedImage.setVisibility(View.VISIBLE);
        } else {
            holder.mCheckedImage.setVisibility(View.INVISIBLE);
        }

        return convertView;
    }

    private class ViewHolder {
        private TextView mTextView;
        private ImageView mCheckedImage;
    }

    public void setSpinnerAdapter(ArrayList<SpinnerItem> spinnerItems) {

        this.listState = spinnerItems;
        notifyDataSetChanged();
    }
}


private void setBottelCountData() {
        final String[] select_qualification = { "", "1", "2",
                "3" };

        bottelCountList = new ArrayList<>();

        for (int i = 0; i < select_qualification.length; i++) {
            SpinnerItem spinnerItem = new SpinnerItem();
            spinnerItem.setTitle(select_qualification[i]);
            if (i == 2) {

                spinnerItem.setSelected(false);
            } else {
                spinnerItem.setSelected(false);
            }
            bottelCountList.add(spinnerItem);
        }

        bottelCountAdapter = new SpinnerAdapter(getActivity(), 0,
                bottelCountList);
        bottelCountAdapter.setDropDownViewResource(R.layout.spinner_item_layout);
        bottel_Count_Spinner.setAdapter(bottelCountAdapter);
        bottel_Count_Spinner.setSelection(3);
    }



bottel_Count_Spinner
                .setOnItemSelectedListener(new OnItemSelectedListener() {

                    public void onItemSelected(AdapterView<?> parent,
                            View view, int position, long id) {
                        if (position == 0) {
                            for (int count = 0; count < bottelCountList.size(); count++) {
                                bottelCountList.get(count).setSelected(false);
                            }
                            noOfBottel = 0;
                            return;
                        }
                        bottelCountList.get(position).setSelected(true);
                        for (int count = 0; count < bottelCountList.size(); count++) {
                            if (position != count) {
                                bottelCountList.get(count).setSelected(false);
                            }
                        }
                        bottel_Count_Spinner.setPrompt("Hello");
                        bottelCountAdapter.setSpinnerAdapter(bottelCountList);
                        noOfBottel = Integer.parseInt(bottelCountList.get(
                                position).getTitle());
                    }

                    public void onNothingSelected(AdapterView<?> parent) {
                    }
                });

用于微调器项目布局的xml

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

    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@+id/checkbox"
        android:layout_centerVertical="true"
        android:padding="10dp"/>

    <ImageView
        android:id="@+id/checkbox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:padding="10dp"
        android:src="@android:drawable/checkbox_on_background"
        android:contentDescription="@string/app_name"
        android:layout_marginLeft="10dp"
        android:layout_alignParentStart="true" />

</RelativeLayout>

Answer 1

你有两种方法

getView - 在您选择值
getDropDownView - 定义打开下拉列表时的查看方式

您必须修改getCustomView并处理差异（隐藏复选框图片）。

试试这个

@Override
public View getDropDownView(int position, View convertView, ViewGroup parent) {
    return getCustomView(position, convertView, parent, true);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    return getCustomView(position, convertView, parent, false);
}

@SuppressLint("InflateParams")
public View getCustomView(int position, View convertView, ViewGroup parent, boolean isDropDown) {
    final ViewHolder holder;
    if (convertView == null) {
        LayoutInflater layoutInflator = LayoutInflater.from(mContext);
        convertView = layoutInflator.inflate(R.layout.spinner_item_layout,
                null);
        holder = new ViewHolder();
        holder.mTextView = (TextView) convertView.findViewById(R.id.text);
        holder.mCheckedImage = (ImageView) convertView
                .findViewById(R.id.checkbox);
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    holder.mTextView.setText(listState.get(position).getTitle());

    if (isDropDown) {
        if (listState.get(position).isSelected()) {
            holder.mCheckedImage.setVisibility(View.VISIBLE);
        } else {
            holder.mCheckedImage.setVisibility(View.INVISIBLE);
        }
    }
    else {
        holder.mCheckedImage.setVisibility(View.INVISIBLE);
    }

    return convertView;
}

Answer 2

您需要为getDropDownView和getView方法分隔观看次数。对于用于选定值的行，将调用getDropDownView。另一方面，当您打开微调器时，会为每一行调用getView。

Answer 3

试试这个，

file = File.new('result.txt', 'w+')
# If you prefer `open`, that works too!
# file = File.open('result.txt', 'w+')
path = Dir[ENV['HOME'] + '/Desktop/Test/*.txt']
file.puts "this is a #{path} test: "

# ensure this is closed, or you'll have memory issues if you do this often
file.close

如何在微调器中仅显示文本

3 个答案: