说明：滚动菜单ListView及点击事件
代码结构：
1、创建一个list展示模型
app\src\main\res\layout\fruit_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/fruit_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/fruit_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:layout_marginLeft="10dp"/>
</LinearLayout>
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2、主界面引用一下
app\src\main\res\layout\activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ListView
android:id="@+id/list_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
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3、创建fruit类
app\src\main\java\com\example\listviewtest\Fruit.java
package com.example.listviewtest;
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;
}
}
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4、创建适配器
app\src\main\java\com\example\listviewtest\FruitAdapter.java
package com.example.listviewtest;
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 resourceId;
public FruitAdapter(Context context,
int textViewResourceId,
List<Fruit> object){
super(context,textViewResourceId,object);
resourceId = textViewResourceId;
}
public View getView(int position, View converView, ViewGroup parent){
Fruit fruit = getItem(position);
View view = LayoutInflater.from(getContext()).inflate(resourceId,parent,false);
ImageView fruitImage = (ImageView) view.findViewById(R.id.fruit_image);
TextView fruitName = (TextView) view.findViewById(R.id.fruit_name);
fruitImage.setImageResource(fruit.getImageId());
fruitName.setText(fruit.getName());
return view;
}
}
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5、主内容
app\src\main\java\com\example\listviewtest\MainActivity.java
package com.example.listviewtest;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
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<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initFruits();//初始化水果数据
FruitAdapter adapter = new FruitAdapter(MainActivity.this,R.layout.fruit_item,fruitList);
ListView listView = (ListView) findViewById(R.id.list_view);
listView.setAdapter(adapter);
//响应点击事件
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Fruit fruit = fruitList.get(i);
Toast.makeText(MainActivity.this,fruit.getName(),Toast.LENGTH_SHORT).show();
}
});
}
private void initFruits(){
for (int i=0;i<2;i++){
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 cherry = new Fruit("Cherry",R.drawable.cherry_pic);
fruitList.add(cherry);
Fruit grape = new Fruit("Grape",R.drawable.grape_pic);
fruitList.add(grape);
Fruit mango = new Fruit("Mango",R.drawable.mango_pic);
fruitList.add(mango);
Fruit orange = new Fruit("Orange",R.drawable.orange_pic);
fruitList.add(orange);
Fruit pear = new Fruit("Pear",R.drawable.pear_pic);
fruitList.add(pear);
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 watermeion = new Fruit("Watermeion",R.drawable.watermeion_pic);
fruitList.add(watermeion);
}
}
}
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运行展示：
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