使用毕加索库的ListView [英] Using Picasso library with ListView

查看：127
本文介绍了使用毕加索库的ListView的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我想要做的就是适应我的自定义的ListView适配器由毕加索库使用从网络上获取的图像。我相信我有，以接受来自毕加索的图像我的适配器变了，但我不能确定如何改变我的实现使用一个ListView接受它。我相信我有访问holder.imageIcon，但我不知道如何得到它运行起来。我的code是如下：

History.java 

 公共类历史{
    公共字符串分;
    公共字符串游戏类型;
    公共毕加索图标;

    公共历史（）{
        超（）;
    }

    公共历史（字符串得分，串游戏类型，毕加索图标）{
        超（）;
        this.score =得分;
        this.gametype =游戏类型;
        this.icon =图标;
    }
}

HistoryAdapter.java 

 公共类HistoryAdapter扩展ArrayAdapter＆LT;历史＆GT; {

    上下文语境;
    INT layoutResId;
    历史数据[] = NULL;

    公共HistoryAdapter（上下文的背景下，INT layoutResId，历史[]数据）{
        超级（上下文，layoutResId，数据）;
        this.layoutResId = layoutResId;
        this.context =背景;
        this.data =数据;
    }

    @覆盖
    公共查看getView（INT位置，查看convertView，ViewGroup中父）{
        HistoryHolder支架=无效;

        如果（convertView == NULL）
        {
            LayoutInflater充气=（（活动）上下文）.getLayoutInflater（）;
            convertView = inflater.inflate（layoutResId，父母，假）;

            持有人=新HistoryHolder（）;
            holder.imageIcon =（ImageView的）convertView.findViewById（R.id.icon）;
            holder.textTitle =（TextView中）convertView.findViewById（R.id.gameType）;
            holder.textScore =（TextView中）convertView.findViewById（R.id.score）;

            convertView.setTag（保持器）;
        }
        其他
        {
            支架=（HistoryHolder）convertView.getTag（）;
        }

        历史记录=数据[位置]
        holder.textScore.setText（history.score）;
        holder.textTitle.setText（history.gametype）;
        holder.imageIcon.setImageResource（history.icon）;


        返回convertView;
    }

    静态类HistoryHolder
    {
        ImageView的ImageIcon的;
        TextView的textTitle;
        TextView的textScore;
    }
}

执行

 历史[] historyData =新的历史[games.length（）];


的for（int i = 0; I＆LT; games.length（）;我++）{
                    JSONObject的C = games.getJSONObject（我）;
                    JSONObject的gameStats = games.getJSONObject（我）.getJSONObject（TAG_STATS）;
                    键入[I] = c.getString（TAG_TYPE）;
                    champId [I] = c.getString（championId）;
                    CS [i] = gameStats.getString（minionsKilled）;
                    杀死[I] = gameStats.getString（championsKilled）;
                    死亡[I] = gameStats.getString（numDeaths）;
                    助攻[I] = gameStats.getString（助攻）;
                    赢得[I] = gameStats.getString（赢）;

                    如果（夺冠[我] .equals（真））
                        赢得[I] =胜利;
                    其他
                        赢得[I] =失败;

                    如果（类[I] .equals（RANKED_SOLO_5x5））
                        键入[I] =排名（独奏）;

                    如果（类[I] .equals（CAP_5x5））
                        键入[I] =TeamBuilder;

                    如果（类[I] .equals（正常））
                        键入[I] =未排序;

                    得分[I] =杀死[I] +/+死亡[I] +/+协助[I];

                    historyData [我] =新的历史（比分[我]，champId [I]，R.drawable.ic_launcher）; //占位符图像

                }

                如果（historyData == NULL）{
                    historyData [0] =新的历史（没有游戏找到，N / A，R.drawable.ic_launcher）; //使用毕加索占位符
                    Log.i（数据，+ historyData）;
                }

                适配器=新HistoryAdapter（MatchHistoryActivity.this，
                        R.layout.list_adapter，
                        historyData）;

                list.setAdapter（适配器）;

list_item.xml 

 ＆LT; RelativeLayout的
    的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
    机器人：layout_width =FILL_PARENT
    机器人：layout_height =机器人：ATTR /列表preferredItemHeight
    机器人：后台=＃111111
    机器人：填充=6dip＆GT;

    ＆LT; ImageView的
        机器人：ID =@ + ID /图标
        机器人：layout_width =WRAP_CONTENT
        机器人：layout_height =FILL_PARENT
        机器人：layout_alignParentBottom =真
        机器人：layout_alignParentTop =真
        机器人：layout_marginRight =6dip
        机器人：contentDescription =TODO
        机器人：SRC =@可绘制/ ic_launcher/＆GT;

    ＆LT;的TextView
        机器人：ID =@ + ID /分
        机器人：文字颜色=＃C49246
        机器人：layout_width =FILL_PARENT
        机器人：layout_height =26dip
        机器人：layout_alignParentBottom =真
        机器人：layout_alignParentRight =真
        机器人：layout_marginLeft =5DP
        机器人：layout_toRightOf =@ ID /图标
        机器人：ellipsize =金字招牌
        机器人：单线=真
        机器人：文本=0/0/0 KDA
        机器人：TEXTSIZE =12SP/＆GT;

    ＆LT;的TextView
        机器人：ID =@ + ID /游戏类型
        机器人：文字颜色=＃C49246
        机器人：layout_width =FILL_PARENT
        机器人：layout_height =WRAP_CONTENT
        机器人：layout_above =@ ID /分
        机器人：layout_alignParentRight =真
        机器人：layout_alignParentTop =真
        机器人：layout_alignWithParentIfMissing =真
        机器人：layout_marginLeft =5DP
        机器人：layout_toRightOf =@ ID /图标
        机器人：重力=center_vertical
        机器人：TEXTSIZE =16SP/＆GT;

＆LT; / RelativeLayout的＆GT;

解决方案

有两件事情你需要改变： 1） History.icon 应该是字符串 URL的图标，而不是一个毕加索对象。您也可以使用文件，乌里或 INT ，但字符串 URL可能是你想要的东西。

2）修改你的适配器的 getView（）方法使用加载图标毕加索（参见前 getView最后一行（）返回 convertView ）：

 公共类HistoryAdapter扩展ArrayAdapter＆LT;历史＆GT; {

    上下文语境;
    INT layoutResId;
    历史数据[] = NULL;

    公共HistoryAdapter（上下文的背景下，INT layoutResId，历史[]数据）{
        超级（上下文，layoutResId，数据）;
        this.layoutResId = layoutResId;
        this.context =背景;
        this.data =数据;
    }

    @覆盖
    公共查看getView（INT位置，查看convertView，ViewGroup中父）{
        HistoryHolder支架=无效;

        如果（convertView == NULL）
        {
            LayoutInflater充气=（（活动）上下文）.getLayoutInflater（）;
            convertView = inflater.inflate（layoutResId，父母，假）;

            持有人=新HistoryHolder（）;
            holder.imageIcon =（ImageView的）convertView.findViewById（R.id.icon）;
            holder.textTitle =（TextView中）convertView.findViewById（R.id.gameType）;
            holder.textScore =（TextView中）convertView.findViewById（R.id.score）;

            convertView.setTag（保持器）;
        }
        其他
        {
            支架=（HistoryHolder）convertView.getTag（）;
        }

        历史记录=数据[位置]
        holder.textScore.setText（history.score）;
        holder.textTitle.setText（history.gametype）;
        Picasso.with（this.context）.load（history.icon）。走进（holder.imageIcon）


        返回convertView;
    }

    静态类HistoryHolder
    {
        ImageView的ImageIcon的;
        TextView的textTitle;
        TextView的textScore;
    }
}

What I'm trying to do is adapt my custom ListView adapter to use images fetched from the web by the Picasso library. I believe I have my adapter changed in order to accept an image from Picasso, but I am unsure how to change my implementation to accept it using a ListView. I believe I have to access holder.imageIcon, but I am not sure how to get it up and running. My code is as follows.

History.java

public class History {
    public String score;
    public String gametype;
    public Picasso icon;

    public History() {
        super();
    }

    public History(String score, String gametype, Picasso icon) {
        super();
        this.score = score;
        this.gametype = gametype;
        this.icon = icon;
    }
}

HistoryAdapter.java

public class HistoryAdapter extends ArrayAdapter<History> {

    Context context;
    int layoutResId;
    History data[] = null;

    public HistoryAdapter(Context context, int layoutResId, History[] data) {
        super(context, layoutResId, data);
        this.layoutResId = layoutResId;
        this.context = context;
        this.data = data;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        HistoryHolder holder = null;

        if(convertView == null)
        {
            LayoutInflater inflater = ((Activity)context).getLayoutInflater();
            convertView = inflater.inflate(layoutResId, parent, false);

            holder = new HistoryHolder();
            holder.imageIcon = (ImageView)convertView.findViewById(R.id.icon);
            holder.textTitle = (TextView)convertView.findViewById(R.id.gameType);
            holder.textScore = (TextView)convertView.findViewById(R.id.score);

            convertView.setTag(holder);
        }
        else
        {
            holder = (HistoryHolder)convertView.getTag();
        }

        History history = data[position];
        holder.textScore.setText(history.score);
        holder.textTitle.setText(history.gametype);
        holder.imageIcon.setImageResource(history.icon);


        return convertView;
    }

    static class HistoryHolder
    {
        ImageView imageIcon;
        TextView textTitle;
        TextView textScore;
    }
}

Implementation

History[] historyData = new History[games.length()];


for(int i = 0; i < games.length(); i++) {
                    JSONObject c = games.getJSONObject(i);
                    JSONObject gameStats = games.getJSONObject(i).getJSONObject(TAG_STATS);
                    type[i] = c.getString(TAG_TYPE);
                    champId[i] = c.getString("championId");
                    cs[i] = gameStats.getString("minionsKilled");
                    kills[i] = gameStats.getString("championsKilled");
                    deaths[i] = gameStats.getString("numDeaths");
                    assists[i] = gameStats.getString("assists");
                    win[i] = gameStats.getString("win");

                    if(win[i].equals("true"))
                        win[i] = "Victory";
                    else
                        win[i] = "Defeat";

                    if(type[i].equals("RANKED_SOLO_5x5"))
                        type[i] = "Ranked (Solo)";

                    if(type[i].equals("CAP_5x5"))
                        type[i] = "TeamBuilder";

                    if(type[i].equals("NORMAL"))
                        type[i] = "Unranked";

                    score[i] = kills[i] +"/" + deaths[i] + "/" + assists[i];

                    historyData[i] = new History(score[i], champId[i], R.drawable.ic_launcher); // Placeholder image

                }

                if(historyData == null) {
                    historyData[0] = new History("No game found", "N/A", R.drawable.ic_launcher); // Use Picasso placeholder
                    Log.i("Data", "" + historyData);
                }

                adapter = new HistoryAdapter(MatchHistoryActivity.this,
                        R.layout.list_adapter,
                        historyData);

                list.setAdapter(adapter);

list_item.xml

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="?android:attr/listPreferredItemHeight"
    android:background="#111111"
    android:padding="6dip" >

    <ImageView
        android:id="@+id/icon"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:layout_alignParentBottom="true"
        android:layout_alignParentTop="true"
        android:layout_marginRight="6dip"
        android:contentDescription="TODO"
        android:src="@drawable/ic_launcher" />

    <TextView
        android:id="@+id/score"
        android:textColor="#C49246"
        android:layout_width="fill_parent"
        android:layout_height="26dip"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_marginLeft="5dp"
        android:layout_toRightOf="@id/icon"
        android:ellipsize="marquee"
        android:singleLine="true"
        android:text="0/0/0 KDA"
        android:textSize="12sp" />

    <TextView
        android:id="@+id/gameType"
        android:textColor="#C49246"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_above="@id/score"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_alignWithParentIfMissing="true"
        android:layout_marginLeft="5dp"
        android:layout_toRightOf="@id/icon"
        android:gravity="center_vertical"
        android:textSize="16sp" />

</RelativeLayout>

解决方案

There are 2 things you need to change: 1) History.icon should be the String url of the icon, not a Picasso object. You can also use a File, Uri, or int, but a String url is probably what you want.

2) Modify your Adapter's getView() method to load the icon using Picasso (see the last line before getView() returns the convertView):

public class HistoryAdapter extends ArrayAdapter<History> {

    Context context;
    int layoutResId;
    History data[] = null;

    public HistoryAdapter(Context context, int layoutResId, History[] data) {
        super(context, layoutResId, data);
        this.layoutResId = layoutResId;
        this.context = context;
        this.data = data;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        HistoryHolder holder = null;

        if(convertView == null)
        {
            LayoutInflater inflater = ((Activity)context).getLayoutInflater();
            convertView = inflater.inflate(layoutResId, parent, false);

            holder = new HistoryHolder();
            holder.imageIcon = (ImageView)convertView.findViewById(R.id.icon);
            holder.textTitle = (TextView)convertView.findViewById(R.id.gameType);
            holder.textScore = (TextView)convertView.findViewById(R.id.score);

            convertView.setTag(holder);
        }
        else
        {
            holder = (HistoryHolder)convertView.getTag();
        }

        History history = data[position];
        holder.textScore.setText(history.score);
        holder.textTitle.setText(history.gametype);
        Picasso.with(this.context).load(history.icon).into(holder.imageIcon)


        return convertView;
    }

    static class HistoryHolder
    {
        ImageView imageIcon;
        TextView textTitle;
        TextView textScore;
    }
}

这篇关于使用毕加索库的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！

查看全文
相关文章
移动开发最新文章
热门教程
热门工具
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆