HashMap 到 ListView [英] HashMap to ListView

问题描述

我有 HashMap，我怎么把它放在 ListView 中?需要使用哪个适配器?

I have HashMap, how can I to put it in ListView? Which adapter need to use?

    public void showCinemas(HashMap<String, String> cinemas)
{
    ...//What?
    list.setAdapter(adapter);
}

推荐答案

制作简单的适配器类:

MyAdapter.java

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.Map;

public class MyAdapter extends BaseAdapter {
    private final ArrayList mData;

    public MyAdapter(Map<String, String> map) {
        mData = new ArrayList();
        mData.addAll(map.entrySet());
    }

    @Override
    public int getCount() {
        return mData.size();
    }

    @Override
    public Map.Entry<String, String> getItem(int position) {
        return (Map.Entry) mData.get(position);
    }

    @Override
    public long getItemId(int position) {
        // TODO implement you own logic with ID
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        final View result;

        if (convertView == null) {
            result = LayoutInflater.from(parent.getContext()).inflate(R.layout.my_adapter_item, parent, false);
        } else {
            result = convertView;
        }

        Map.Entry<String, String> item = getItem(position);

        // TODO replace findViewById by ViewHolder
        ((TextView) result.findViewById(android.R.id.text1)).setText(item.getKey());
        ((TextView) result.findViewById(android.R.id.text2)).setText(item.getValue());

        return result;
    }
}

layout/my_adapter_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        >

    <TextView
            android:id="@android:id/text1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            />

    <TextView
            android:id="@android:id/text2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            />
</LinearLayout>

您的代码:

public void showCinemas(HashMap<String, String> cinemas) {
    MyAdapter adapter = new MyAdapter(cinemas);
    list.setAdapter(adapter);
}

这篇关于HashMap 到 ListView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！