Android滚动菜单ListView实例详解
本文实例为大家分享了Android使用ListView实现滚动菜单的具体代码,供大家参考,具体内容如下
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>
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>
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; } }
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; } }
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); } } }
运行展示:
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
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