android 自定义listview

短命女 2022-03-11 05:08 234阅读 0赞

## android 自定义listview ##

MainActivity.java

public class MainActivity extends AppCompatActivity {
        private ListView listView;
        private ItemAdapter itemAdapter;//自定义的适配器
        private List<Item> arr;//列表数组
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            listView = findViewById(R.id.listView);
            init();//
            ItemAdapter itemAdapter = new ItemAdapter(MainActivity.this,R.layout.item,arr);
            listView.setAdapter(itemAdapter);
        }
        private void init(){
            arr = new ArrayList<Item>();
            Item item1 = new Item("zezeze",R.drawable.ic_launcher_background);
            arr.add(item1);
        }
    }

Item.java

public class Item {
        private String text;
        private int image;
        public Item(String text,int image){
            this.text = text;
            this.image = image;
        }
        public String getText(){
            return text;
        }
        public int getImage(){
            return image;
        }
    }

ItemAdapter .java

public class ItemAdapter extends ArrayAdapter<Item> {
        private int newId;
        public ItemAdapter(Context context,int resourceId,List<Item> arr){
            super(context,resourceId,arr);
            newId = resourceId;
        }
        @Override
        public View getView(final int position, View converView, ViewGroup parent){
            Item item = getItem(position);
            View view = LayoutInflater.from(getContext()).inflate(newId,parent,false);
            TextView text = view.findViewById(R.id.text);
            ImageView image = view.findViewById(R.id.image);
            text.setText(item.getText());
            image.setImageResource(item.getImage());
            return view;
        }
    }

activity\_main.xml

<?xml version="1.0" encoding="utf-8"?>
    <android.support.constraint.ConstraintLayout 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:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/listView"></ListView>
    
    </android.support.constraint.ConstraintLayout>

item.xml

<?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="match_parent"
        android:gravity="center_vertical">
        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/image"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/text"
            android:gravity="center_vertical"/>
    </LinearLayout >