
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.List;
public class FruitAdapter extends ArrayAdapter<Fruit> {
private int defaultSelection = -1;
private List<Fruit> list;
private int resourceId;
public FruitAdapter(Context context, int textViewResourceId,
List<Fruit> objects) {
super(context, textViewResourceId, objects);
resourceId = textViewResourceId;
this.list=objects;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Fruit fruit = getItem(position);
ViewHolder viewHolder;
if (convertView == null) {
convertView = LayoutInflater.from(getContext()).inflate(resourceId,null);
viewHolder = new ViewHolder(convertView);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.fruitImage.setImageResource(fruit.getImageId());
viewHolder.fruitName.setText(fruit.getName());
return convertView;
}
private class ViewHolder {
ImageView fruitImage;
View view;
TextView fruitName;
public ViewHolder(View view) {
this.view = view;
this.fruitImage = (ImageView) view.findViewById(R.id.fruit_image);
this.fruitName = (TextView) view.findViewById(R.id.fruit_name);
}
}
/**
* @param position 设置高亮状态的item
*/
public void removeSelectPosition(int position) {
if (!(position < 0 || position > list.size())) {
list.remove(position);
notifyDataSetChanged();
}
}
}
package nativesample.videolan.org.listview
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.AdapterView
import android.widget.ListView
import android.widget.Toast
import java.util.ArrayList
import java.util.List
public class MainActivity extends AppCompatActivity {
private List<Fruit> fruitList = new ArrayList<Fruit>()
FruitAdapter adapter
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
initFruits()
adapter = new FruitAdapter(MainActivity.this, R.layout.fruit_item, fruitList)
ListView listView = (ListView) findViewById(R.id.list_view)
listView.setAdapter(adapter)
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Fruit fruit = fruitList.get(position)
Toast.makeText(MainActivity.this, fruit.getName(), Toast.LENGTH_SHORT).show()
adapter.removeSelectPosition(position)
}
})
}
private void initFruits() {
for (int i = 0
Fruit apple = new Fruit("Apple", R.drawable.apple_pic)
fruitList.add(apple)
Fruit banana = new Fruit("Banana", R.drawable.banana_pic)
fruitList.add(banana)
Fruit orange = new Fruit("Orange", R.drawable.orange_pic)
fruitList.add(orange)
Fruit watermelon = new Fruit("Watermelon", R.drawable.watermelon_pic)
fruitList.add(watermelon)
Fruit pear = new Fruit("Pear", R.drawable.pear_pic)
fruitList.add(pear)
Fruit grape = new Fruit("Grape", R.drawable.grape_pic)
fruitList.add(grape)
Fruit pineapple = new Fruit("Pineapple", R.drawable.pineapple_pic)
fruitList.add(pineapple)
Fruit strawberry = new Fruit("Strawberry", R.drawable.strawberry_pic)
fruitList.add(strawberry)
Fruit cherry = new Fruit("Cherry", R.drawable.cherry_pic)
fruitList.add(cherry)
Fruit mango = new Fruit("Mango", R.drawable.mango_pic)
fruitList.add(mango)
}
}
}
package nativesample.videolan.org.listview;
public class Fruit {
private String name;
private int imageId;
public Fruit(String name, int imageId) {
this.name = name;
this.imageId = imageId;
}
public String getName() {
return name;
}
public int getImageId() {
return imageId;
}
}