ListView的Item樣式自定義

要自定義ListView的Item樣式，可以通過創建一個自定義的布局文件來定義每個Item的外觀和布局。以下是一個簡單的示例：

1. 創建一個名為"list_item_layout.xml"的布局文件，定義Item的外觀和布局：

<?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"
    android:padding="16dp">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:src="@drawable/ic_launcher_background"/>

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:text="Item Text"
        android:textSize="16sp"/>

</LinearLayout>

2. 在適配器中使用這個自定義的布局文件來為ListView的每個Item設置樣式：

public class CustomAdapter extends ArrayAdapter<String> {

    private Context mContext;
    private List<String> mList;

    public CustomAdapter(Context context, List<String> list) {
        super(context, R.layout.list_item_layout, list);
        this.mContext = context;
        this.mList = list;
    }

    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
        View view = convertView;
        if (view == null) {
            LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            view = inflater.inflate(R.layout.list_item_layout, parent, false);
        }

        ImageView imageView = view.findViewById(R.id.imageView);
        TextView textView = view.findViewById(R.id.textView);

        imageView.setImageResource(R.drawable.ic_launcher_foreground);
        textView.setText(mList.get(position));

        return view;
    }
}

3. 在Activity中設置ListView的適配器為自定義的適配器：

public class MainActivity extends AppCompatActivity {

    private ListView listView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        listView = findViewById(R.id.listView);

        List<String> dataList = new ArrayList<>();
        dataList.add("Item 1");
        dataList.add("Item 2");
        dataList.add("Item 3");

        CustomAdapter adapter = new CustomAdapter(this, dataList);
        listView.setAdapter(adapter);
    }
}

通過以上步驟，就可以自定義ListView的Item樣式了。可以根據需求修改自定義布局文件和適配器中的代碼來實現不同樣式的Item。