Java 从简单的listview代码创建自定义适配器
我需要为listview创建一个自定义适配器,但我不明白如何才能做到这一点。实际上,它在我的工作中起作用,但只是使用一个列表视图,所有对象都在默认的android列表布局中。我需要单独创建自定义适配器的对象。这是实际代码:Java 从简单的listview代码创建自定义适配器,java,android,android-listview,custom-adapter,Java,Android,Android Listview,Custom Adapter,我需要为listview创建一个自定义适配器,但我不明白如何才能做到这一点。实际上,它在我的工作中起作用,但只是使用一个列表视图,所有对象都在默认的android列表布局中。我需要单独创建自定义适配器的对象。这是实际代码: private static class SoluzioniLoader extends AsyncTaskLoader<List<Soluzione>> { private FermataComune partenza; priva
private static class SoluzioniLoader extends AsyncTaskLoader<List<Soluzione>> {
private FermataComune partenza;
private FermataComune arrivo;
private String data;
public SoluzioniLoader(Context context, FermataComune partenza, FermataComune arrivo, String data) {
super(context);
this.partenza = partenza;
this.arrivo = arrivo;
this.data = data;
}
@Override
public List<Soluzione> loadInBackground() {
try {
List<Soluzione> soluzioni = Client.cercaCorseAndata(partenza, arrivo, data);
return soluzioni;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
}
private LoaderCallbacks<List<Soluzione>> mLoaderCallbacks = new LoaderCallbacks<List<Soluzione>>() {
private ProgressDialog pd;
@Override
public Loader<List<Soluzione>> onCreateLoader(int id, Bundle args) {
pd = new ProgressDialog(SoluzioniActivity.this);
pd.setTitle("Caricamento Soluzioni Trovate");
pd.setMessage("Attendi...");
pd.setIndeterminate(false);
pd.show();
return new SoluzioniLoader(SoluzioniActivity.this, partenza, arrivo, data);
}
@Override
public void onLoadFinished(Loader<List<Soluzione>> loader, List<Soluzione> data) {
try {
pd.dismiss();
} catch(Exception e){
}
if (data == null) {
// ERRORE
} else {
mListView.setAdapter(new ArrayAdapter<Soluzione>(SoluzioniActivity.this, android.r.layout.simple_list_item_1, data));
}
我已经为该行创建了布局
<?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="vertical"
>
<TextView
android:id="@+id/fromhour"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"
/>
<TextView
android:id="@+id/from"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
/>
<TextView
android:id="@+id/tohour"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
/>
<TextView
android:id="@+id/to"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
/>
</LinearLayout>
如何在这里创建和集成自定义适配器?谢谢请尝试以下代码:
//声明您的自定义适配器:
private EfficientAdapter adapter;
在onCreate中初始化它:
adapter = new EfficientAdapter(this);
然后设置列表适配器
your_listview.setAdapter(adapter);
//您的适配器代码:
private class EfficientAdapter extends BaseAdapter {
private LayoutInflater mInflater;
private Context context;
private Bitmap imageBitmap = null;
public EfficientAdapter(Context context) {
mInflater = LayoutInflater.from(context);
this.context = context;
}
@Override
public int getCount() {
return YOUR_ARRAY.size();
}
@Override
public Object getItem(int arg0) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.featured_item, null);
holder = new ViewHolder();
holder.txtTitle = (TextView) convertView.findViewById(R.id.txtTitle);
holder.txtAuthorName = (TextView) convertView.findViewById(R.id.txtAuthorName);
holder.txtDescription = (TextView) convertView.findViewById(R.id.txtDescription);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.txtTitle.setText(data.get(position).get("article_title"));
holder.txtAuthorName.setText(data.get(position).get("author_name"));
holder.txtDescription.setText(data.get(position).get("article_text"));
return convertView;
}
class ViewHolder {
//YOUR ATTRUBUTES TO DISPLAY IN LIST DECLARE HERE
TextView txtTitle;
TextView txtAuthorName;
TextView txtDescription;
}
}
我需要了解如何将您的代码集成到我的代码中:它是完美的,感谢您的回答..因此,我需要创建适配器作为您的适配器,但具有正确的文本视图,然后呢?在我的书里有:this.partenza=partenza;this.arrivo=arrivo;这个数据=数据;那是我的目标。。我发布的代码。。我必须重写它吗?只需创建一个arraylist或数据数组,然后在TextView中替换要挖掘的值,使用您的texuviews,就这样,请接受并向上投票答案。我正在尝试。。我会告诉你我是否会做正确的:D