listview网格线
时间: 2023-09-21 20:11:56 浏览: 75
要为ListView添加网格线,你需要创建一个自定义的ListView的适配器。在适配器中,你可以通过修改列表项的布局来实现网格线效果。以下是一个示例代码:
```java
public class GridLinesAdapter extends ArrayAdapter<String> {
private Context mContext;
public GridLinesAdapter(Context context, int resource, List<String> objects) {
super(context, resource, objects);
mContext = context;
}
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
View view;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.list_item, null);
} else {
view = convertView;
}
// 设置网格线效果
int numColumns = 3; // 每行显示的列数
int numRows = getCount() / numColumns; // 总行数
int row = position / numColumns; // 当前项所在行数
int column = position % numColumns; // 当前项所在列数
// 添加顶部边框
if (row == 0) {
view.setBackgroundResource(R.drawable.grid_line_top);
}
// 添加左边边框
if (column == 0) {
view.setBackgroundResource(R.drawable.grid_line_left);
}
// 添加右边边框
if (column == numColumns - 1) {
view.setBackgroundResource(R.drawable.grid_line_right);
}
// 添加底部边框
if (row == numRows - 1) {
view.setBackgroundResource(R.drawable.grid_line_bottom);
}
return view;
}
}
```
在上面的代码中,你需要创建一个名为`list_item`的列表项布局文件,并为其设置适当的背景。例如,你可以在`res/drawable`目录下创建以下网格线资源文件:
grid_line_top.xml:
```xml
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#CCCCCC" />
<size android:height="1dp" />
</shape>
```
grid_line_left.xml:
```xml
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#CCCCCC" />
<size android:width="1dp" />
</shape>
```
grid_line_right.xml:
```xml
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#CCCCCC" />
<size android:width="1dp" />
</shape>
```
grid_line_bottom.xml:
```xml
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#CCCCCC" />
<size android:height="1dp" />
</shape>
```
最后,在你的活动中,将自定义的适配器设置给ListView:
```java
List<String> data = Arrays.asList("Item 1", "Item 2", "Item 3", "Item 4", "Item 5", "Item 6");
ListView listView = findViewById(R.id.list_view);
GridLinesAdapter adapter = new GridLinesAdapter(this, R.layout.list_item, data);
listView.setAdapter(adapter);
```
请注意,上述示例中使用的网格线资源仅作为示例。你可以根据自己的需求修改网格线的颜色、大小等属性。