ArrayAdapter我用一个覆盖的方法扩展了一个对象getView()来填充我的ListView对象，但是适配器会从ArrayList我传递给它的对象中获取前两个或三个对象，然后在整个列表长度中以看似随机的顺序重复这些对象。此外，当我在 中上下滚动时ListView，一些行从一个列表项更改为另一个。该ArrayList<Credit>对象是从 JSONObject 填充的，据我所知，在传递到ArrayAdapter.
我的习惯ArrayAdapter
private class CreditArrayAdapter extends ArrayAdapter<Credit> {
private ArrayList<Credit> credits;
private int creditCount;
public CreditArrayAdapter(Context ctx, int textViewResourceId, List<Credit> items) {
super(ctx, textViewResourceId, items);
credits = (ArrayList<Credit>) items;
creditCount = credits.size();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.list_item_movie_medium, null);
Credit current = credits.get(position);
Log.d(tag, "current credit: " + current.toString());
ImageView creditPicture = (ImageView) v.findViewById(R.id.image_poster_thumbnail);
try {
creditPicture.setImageBitmap(current.getPosterSmall());
} catch(Exception e) {
Log.d(tag, "failed to set cast member picture");
e.printStackTrace();
}
TextView castMemberName = (TextView) v.findViewById(R.id.text_credit_info);
castMemberName.setText(current.toString());
}
return v;
}
@Override
public int getCount() {
return creditCount;
}
}
被调用：
appearsIn = (ListView) findViewById(R.id.listview_appears_in);
List<Credit> credits = searcher.getCreditsByPersonId(personId);
CreditArrayAdapter creditAdapter = new CreditArrayAdapter(getBaseContext(), R.layout.list_item_movie_medium, credits);
creditAdapter.notifyDataSetChanged();
appearsIn.setAdapter(creditAdapter);
包含的布局ListView：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_centerHorizontal="true"
android:weightSum="2">
<ScrollView android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView android:id="@+id/image_person_info"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:contentDescription="person image"/>
<TextView android:id="@+id/text_person_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30dp"/>
<TextView android:id="@+id/text_person_birth"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20dp"/>
<TextView android:id="@+id/text_person_death"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20dp"/>
<TextView android:id="@+id/text_person_bio"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16dp"/>
</LinearLayout>
</ScrollView>
<ListView android:id="@+id/listview_appears_in"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"/>
</LinearLayout>
我的列表项布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal">
<ImageView android:id="@+id/image_poster_thumbnail"
android:layout_height="wrap_content"
android:layout_width="wrap_content"/>
<TextView android:id="@+id/text_credit_info"
android:layout_height="wrap_content"
android:layout_width="fill_parent"/>
</LinearLayout>