我正在尝试做的是调整我的自定义ListView适配器以使用Picasso库从网络获取的图像.我相信我已经更改了适配器以接受来自毕加索的图像,但我不确定如何使用ListView更改我的实现以接受它.我相信我必须访问holder.imageIcon,但我不知道如何让它运行起来.我的代码如下.
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;
}
}
履行
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>
解决方法
您需要更改两件事：
1)History.icon应该是图标的String url,而不是Picasso对象.您也可以使用File,Uri或int,但String url可能就是您想要的.
1)History.icon应该是图标的String url,而不是Picasso对象.您也可以使用File,Uri或int,但String url可能就是您想要的.
2)修改Adapter的getView()方法,使用Picasso加载图标(请参阅getView()返回convertView之前的最后一行)：
public class HistoryAdapter extends ArrayAdapter<History> {
Context context;
int layoutResId;
History data[] = null;
public HistoryAdapter(Context context,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;
}
}
