Question

我有一个带有81个按钮的GridView。我想将clicklistener添加到此gridview，但它不可用。我添加了OnItemClickListener，但它无法正常工作，我无法理解为什么。代码没有错误。唯一不起作用的是OnItemClickListener。

我的gridview子节点上有一个按钮（gridview_members.xml）;

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

<Button
    android:id="@+id/city"
    android:layout_width="183dp"
    android:layout_height="90dp"
    android:textSize="19sp"
    android:textStyle="bold"
    android:text="Code\n\nCity"
    android:gravity="center"
    android:background="@drawable/city_btn_tablet" />

</RelativeLayout>

我的ImageAdapter类;

public class ImageAdapter extends BaseAdapter {
private Context mContext;

public ImageAdapter(Context c) {
    mContext = c;
}

public int getCount() {
    return 81;
}

public Object getItem(int position) {
    return null;
}

public long getItemId(int position) {
    return 0;
}

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

    LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    View gridView;

    gridView =new View(mContext);

    gridView = inflater.inflate(R.layout.gridview_members, null);

    Button city = (Button) gridView.findViewById(R.id.city);

    return gridView;
}

}

activity_main.xml上的Gridview实现;

<GridView
android:id="@+id/gridview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:horizontalSpacing="5dp"
android:verticalSpacing="5dp"
android:gravity="center"
android:stretchMode="columnWidth"
android:numColumns="6" >
</GridView>

最后是我的MainActivity.java文件;

public class MainActivity extends Activity{

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

    GridView gridview = (GridView) findViewById(R.id.gridview);
    gridview.setAdapter(new ImageAdapter(this));

    gridview.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
            Toast.makeText(MainActivity.this, "" + position, Toast.LENGTH_SHORT).show();
        }
    });
}
}

Answer 1

GridView是可点击的，无需在GridView中放置按钮。

要向网格添加侦听器，请添加以下代码：

// Implement On Item click listener
gridView1.setOnItemClickListener(new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

        switch (position) {
            case 0: 
                break;
            case 1:
                break;

        }
    }
});

依此类推，您可以添加案例中的所有数字。

Answer 2

您要求点击该项目（而不是项目内的按钮），因此需要更改您的子XML格式

来自

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

<Button
    android:id="@+id/city"
    android:layout_width="183dp"
    android:layout_height="90dp"
    android:textSize="19sp"
    android:textStyle="bold"
    android:text="Code\n\nCity"
    android:gravity="center"
    android:background="@drawable/city_btn_tablet" />

</RelativeLayout>

到

<?xml version="1.0" encoding="utf-8"?>
<Button
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/city"
    android:layout_width="183dp"
    android:layout_height="90dp"
    android:textSize="19sp"
    android:clickable="true"
    android:textStyle="bold"
    android:text="Code\n\nCity"
    android:gravity="center"
    android:background="@drawable/city_btn_tablet" />

或者您可以在适配器

中添加ClickListener

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

    LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    View gridView;

    gridView =new View(mContext);

    gridView = inflater.inflate(R.layout.gridview_members, null);

    Button city = (Button) gridView.findViewById(R.id.city);

                city.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

    //Toast here

        }});

    return gridView;
}

Answer 3

如果您想获得点击项目的文字，可以使用此

gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                String item = ((TextView)view.findViewById(R.id.ID_OF_TEXTVIEW)).getText().toString();
                Toast.makeText(showMissions.this, "" + item, Toast.LENGTH_SHORT).show();

            }
        });

Answer 4

我建议你在getview方法中添加点击监听器，而不是添加活动类。试试这段代码

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

LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

View gridView;

gridView =new View(mContext);

gridView = inflater.inflate(R.layout.gridview_members, null);

Button city = (Button) gridView.findViewById(R.id.city);

city.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View arg0) {
        // TODO Auto-generated method stub
            //Do your task here
        }
    });
    return gridView;
}

Answer 5

在CustomAdapter中

 onBindViewHolder(...
{
  yourViewHolder.gridview.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
        //Do Something
       }
    });

}

Answer 6

您可以通过这种方式将点击侦听器添加到Kotlin中的网格视图项中

grdlyt_merchant_color_code.onItemClickListener = AdapterView.OnItemClickListener { parent, view, position, id ->
            loyaltyColor = parent.getItemAtPosition(position) as LoyaltyColor?
            colorCode= LoyaltyUtils.getLoyaltyColorById(loyaltyColor!!.colorId).colorCode
            val color = ContextCompat.getColor(requireContext(), colorCode!!)
            shape.setColor(color)
            loyalty_card_img.background = shape
            uncheckAllColors()
            loyalty_card_img.visibility = View.GONE
            loyaltyColor!!.isColorSelected = true

            mAdapter.notifyDataSetChanged()
        }

如何添加gridview setOnItemClickListener

6 个答案: