无线电集团对网格视图Android中实现 [英] Radio Group implementation on Grid View in Android

问题描述

欲广播小组的GridView实施，所以，只有单个项可以网格的元件中选择。

I want Radio Group implementation on GridView, so that only single item can be selected among the elements of grid.

请帮忙。

推荐答案

限制元素的选择从电网的目的，可以完成如下：

The purpose to restrict the select of element from the grid can be accomplished as follows:

1.Creation格元素。

1.Creation of Grid element.

<LinearLayout
    android:id="@+id/item_layout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical" 
      android:gravity="center">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" />

    <RadioButton
        android:id="@+id/radiobtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Image" />


</LinearLayout>

在自定义适配器的getView（）方法2.Inflating此XML。

2.Inflating this xml in the getView() method of customize adapter.

public class MyAdapter extends BaseAdapter {

    Context mCtx;
    int[] mImg;
    LayoutInflater layoutInflater;
    RadioGroup rgp;
    private RadioButton mSelectedRB;
    private int mSelectedPosition = -1;

    public MyAdapter(Context context, int[] img) {
        this.mCtx = context;
        this.mImg = img;
        rgp = new RadioGroup(context);
        layoutInflater = (LayoutInflater) mCtx
                .getSystemService(LAYOUT_INFLATER_SERVICE);

    }

    @Override
    public int getCount() {

        return mImg.length;
    }

    @Override
    public Object getItem(int position) {

        return null;
    }

    @Override
    public long getItemId(int position) {

        return 0;
    }

    @Override
    public View getView(final int position, View convertView,
            ViewGroup parent) {
        View view = convertView;
        Holder holder;

        if (view == null) {
            view = layoutInflater.inflate(R.layout.element, null);
            holder = new Holder();
            holder.image = (ImageView) view.findViewById(R.id.imageView);
            holder.radioButton = (RadioButton) view
                    .findViewById(R.id.radiobtn);
            view.setTag(holder);

        } else {

            holder = (Holder) view.getTag();
        }

        holder.radioButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                if ((position != mSelectedPosition && mSelectedRB != null)) {
                    mSelectedRB.setChecked(false);
                }

                mSelectedPosition = position;
                mSelectedRB = (RadioButton) v;
            }
        });

        if (mSelectedPosition != position) {
            holder.radioButton.setChecked(false);
        } else {
            holder.radioButton.setChecked(true);
            if (mSelectedRB != null && holder.radioButton != mSelectedRB) {
                mSelectedRB = holder.radioButton;
            }
        }

        return view;
    }

}

private class Holder {

    ImageView image;
    RadioButton radioButton;

}

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