如何为Category和CategoryItem设置android xml布局 [英] How can I make an android xml layout for Category and CategoryItem
本文介绍了如何为Category和CategoryItem设置android xml布局的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我是使用Java和Android Studio的新手,我想知道如何在1个活动中进行这样的布局. myImage
I'am new in using java and android studio and i was wondering how can i make a layout like this in 1 activity. myImage
推荐答案
您正在寻找的是Listview适配器
What you are looking for is a Listview adapter
public class ExampleAdapter extends BaseAdapter {
List<Product> products;
private Activity context;
@Override
public int getCount() {
return products.size();
}
public ExampleAdapter(List<Product> products, Activity context) {
this.products = products;
this.context = context;
}
@Override
public Object getItem(int position) {
return products.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final Product product = products.get(position);
ViewHolder holder;
if (convertView == null) {
LayoutInflater inflater = context.getLayoutInflater();
convertView = inflater.inflate(R.layout.row_shopping_item, null);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.getProductTextView().setText(product.getName());
holder.getProductImageView(). setImageResource(product.getPicture());
return convertView;
}
private class ViewHolder {
private final TextView productTextView;
private final ImageView productImageView;
private ViewHolder(View wrapperView) {
productTextView = (TextView) wrapperView.findViewById(R.id.tvName);
productImageView = (TextView) wrapperView.findViewById(R.id.ivPicture);
}
public TextView getProductTextView() {
return productTextView;
}
public ImageView getProductImageView() {
return productImageView;
}
}
}
此适配器需要一个布局来定义行的外观.这将是这样的
This adapter needs a layout to define what the rows will look like. This will be something like this
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:layout_gravity="center_vertical"
android:layout_width="50dp"
android:id="@+id/ivPicture"
android:layout_height="50dp" />
<TextView
android:id="@+id/tvName"
android:text="Product 1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
在活动中最后一个要显示概述的地方,您将需要使用列表视图并设置适配器
Lastly in your activity where you want to display the overview you will need to use a listview and set the adapter
final ExampleAdapter adapter = new ExampleAdapter(list, this);
listview.setAdapter(adapter);
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