java - 如何在ListView的每一行添加按钮？

Question

我试图在 ListView 中的每一行上实现按钮，但我看到了很多主题，但我没有成功向我的主题添加代码。这是我的主要 Activity :

public class MainActivity extends AppCompatActivity {

private ArrayAdapter<String> itemsAdapter;
private ArrayList<String> items;
private ImageButton formButton;
private ListView lvMain;

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

public void commonFunction() {
    lvMain = (ListView) findViewById(R.id.lvMain);
    items = new ArrayList<String>();
    readItems();
    itemsAdapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_1,
            items);
    lvMain.setAdapter(itemsAdapter);
    formButton = (ImageButton) findViewById(R.id.btnPlus);
    formButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            setLayoutActivity();
        }
    });
}
}

这是我的activity_main.xml:

<ListView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/lvMain"
    android:layout_above="@+id/btnPlus" />

<ImageButton
    android:layout_width="match_parent"
    android:layout_height="65dp"
    android:id="@+id/btnPlus"
    android:layout_alignParentBottom="true"
    app:srcCompat="@mipmap/ic_plus_foreground" />

有人知道该怎么做吗？

Answer 1

使用自定义行布局文件创建自定义适配器，并在该行文件上添加按钮并将其绑定(bind)到列表/回收器 View 。所以它会在所有行中膨胀。

在 row_list.xml 文件中添加以下代码。

<ImageButton
android:layout_width="match_parent"
android:layout_height="65dp"
android:id="@+id/btnPlus"
android:layout_alignParentBottom="true"
app:srcCompat="@mipmap/ic_plus_foreground" />

自定义适配器.java

public class CustomAdapter extends BaseAdapter {

private ArrayList data;
private static LayoutInflater inflater = null;


/*************  CustomAdapter Constructor *****************/
public CustomAdapter(ArrayList d) {

    /********** Take passed values **********/
    data = d;

    /***********  Layout inflater to call external xml layout () ***********/
    inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

}

/******** What is the size of Passed Arraylist Size ************/
public int getCount() {

    if (data.size() <= 0)
        return 1;
    return data.size();
}

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

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

/********* Create a holder Class to contain inflated xml file elements *********/
public static class ViewHolder {
    public ImageButton button;

}

/****** Depends upon data size called for each row , Create each ListView row *****/
public View getView(int position, View convertView, ViewGroup parent) {

    View vi = convertView;
    ViewHolder holder;

    if (convertView == null) {

        /****** Inflate tabitem.xml file for each row ( Defined below ) *******/
        vi = inflater.inflate(R.layout.row_list, null);

        /****** View Holder Object to contain tabitem.xml file elements ******/

        holder = new ViewHolder();
        holder.button = (ImageView) vi.findViewById(R.id.btnPlus);

        /************  Set holder with LayoutInflater ************/
        vi.setTag(holder);
    } else
        holder = (ViewHolder) vi.getTag();

    holder.button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //Button click
        }
    });
    return vi;
}}

希望能解决问题。

编码愉快!!