Question

我有一个活动让用户点击他所处的任何心情。我创建了一个gridView并用包含imageView和textView的相对布局对其进行了充气。我已经为它设置了一个customAdaptor。我在gridView上设置了onItemClickListener但它没有响应。

Java类和适配器类

<div class="input-wrapper">
  <input type="radio" id='custom-radio' class='custom-radio'>
  <label for="custom-radio"></label>
</div>

<div class="input-wrapper">
  <input type="radio" id='custom-radio' class='custom-radio'>
  <label for="custom-radio"></label>
</div>

XML文件

public class SelectMoodActivity extends Activity {
    protected ArrayList<Moods> data;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_select_mood);

        data = MoodProvider.getData();
        ArrayAdapter<Moods> moodsArrayAdapter = new CustomGridViewAdapter(this, R.layout.row_grid, data);
        GridView gridView = findViewById(R.id.moodSelect);
        gridView.setAdapter(moodsArrayAdapter);


        /*
        Tried to setOnClickEvent for MOOD Select */
        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                Toast.makeText(getApplicationContext(), "You selected a Mood", Toast.LENGTH_LONG).show();

            }
        });
    }


    class CustomGridViewAdapter extends ArrayAdapter<Moods> {
        Context context;
        ArrayList<Moods> moodsArrayList;
        int resource;

        public CustomGridViewAdapter(Context context, int resource, ArrayList<Moods> objects) {
            super(context, resource, objects);
            this.context = context;
            this.moodsArrayList = objects;
            this.resource = resource;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {

            View view = convertView;
            ViewHolder holder;
            if(view == null){
                LayoutInflater inflater = LayoutInflater.from(context);
                view = inflater.inflate(resource, parent, false);
                holder = new ViewHolder();
                holder.moodTitle = view.findViewById(R.id.item_text);
                holder.moodIcon = view.findViewById(R.id.item_image);
                view.setTag(holder);
            }else{
                holder  = (ViewHolder) view.getTag();
            }

            Moods mood  = moodsArrayList.get(position);
            holder.moodTitle.setText(mood.getMoodTitle());
            int res = context.getResources().getIdentifier(mood.getMoodIcon(), "drawable", context.getPackageName());
            holder.moodIcon.setImageResource(res);

            /*
            Tried to setOnClickEvent for MOOD Select inside the adaptor but this also didn't work.
            view.setId(position);
            view.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(getApplicationContext(), "Please Enter All Details", Toast.LENGTH_LONG).show();
                }
            });
            */

            return view;

        }

    }
    static class ViewHolder {
        TextView moodTitle;
        ImageView moodIcon;
    }

}

row_grid.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="net.moodsense.moodsense.SelectMoodActivity"
    android:background="@color/white">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/textMood"
        android:id="@+id/textMood"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="15dp"
        android:textSize="24sp"
        android:textColor="@color/black" />

    <GridView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/moodSelect"
        android:layout_below="@+id/textMood"
        android:layout_marginTop="15dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:numColumns="3"
        android:verticalSpacing="10dp"
        android:horizontalSpacing="20dp"
        android:stretchMode="columnWidth"
        android:gravity="center"/>

</RelativeLayout>

Answer 1

在自定义适配器类中创建一个接口，并在单击事件中使用，如下面的代码...

    onItemClickListner onItemClickListner;

public void setOnItemClickListner(CustomGridViewAdapter.onItemClickListner onItemClickListner) {
    this.onItemClickListner = onItemClickListner;
}

public interface onItemClickListner {
        void onClick();// hear you can pass any type of data as a argument;
}

然后在适配器类中的getView（）方法之后定义下面的单击事件处理代码。

 view.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                onItemClickListner.onClick();
            }
        });

然后在为活动处理定义适配器对象时，在活动代码中使用下面的网格视图中绑定适配器。

    moodsArrayAdapter.setOnItemClickListner(new CustomGridViewAdapter.onItemClickListner() {
        @Override
        public void onClick() {
            Toast.makeText(getApplicationContext(),"Hello world",0).show();
        }
    });

Answer 2

在rawGrid＆gt; RelativLayout中添加 android：descendantFocusability =“blocksDescendants

并添加

focusable =“false”在rawGrid＆gt; RelativLayout＆gt; textview，rawGrid＆gt; RelativLayout＆gt; imageview

和

gridview

中

focusable =“true”

onItemClickListener在Android中使用CustomAdaptor无法在GridView中工作

2 个答案: