[英]Navigation Drawer does not recognize custom adapter layout
有人可以指出此代碼段是什么問題
Custom adapter
public class NavigationAdapter extends ArrayAdapter<NavItem> {
private Context context;
private NavItem[] values;
public NavigationAdapter(Context context, int layoutResourceId,NavItem[] values) {
super(context, layoutResourceId);
this.context = context;
this.values = values;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final Holder holder;
LayoutInflater vi = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View convertView1 = convertView;
if (convertView1 == null) {
holder = new Holder();
convertView1 = vi.inflate(R.layout.item_row, parent,false);
holder.imageView = (ImageView) convertView1.findViewById(R.id.rowIcon);
holder.textView = (TextView) convertView1.findViewById(R.id.rowText);
convertView1.setTag(holder);
} else {
holder = (Holder) convertView1.getTag();
}
NavItem item = values[position];
holder.imageView.setImageResource(item.icon);
holder.textView.setText(item.name);
return convertView1;
}
private class Holder {
public TextView textView;
public ImageView imageView;
}
}
custom listview layout
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:background="?android:attr/activatedBackgroundIndicator"
android:minHeight="?android:attr/listPreferredItemHeightSmall"
android:padding ="10dp">
<ImageView
android:id="@+id/rowIcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:src="@drawable/ic_action_settings"
android:paddingRight="10dp"/>
<TextView
android:id="@+id/rowText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toRightOf="@+id/rowIcon"
android:paddingRight="10dp"
android:textAppearance="?android:attr/textAppearanceListItemSmall"/>
Main activity
NavItem settings = new NavItem();
settings.icon = R.drawable.ic_action_settings;
settings.name = "Settings";
NavItem send = new NavItem(R.drawable.ic_action_settings,"Sent");
NavItem[] values = new NavItem[]{
settings,send
};
NavigationAdapter adapter = new NavigationAdapter(this, R.layout.item_row, values);
mDrawerListView.setAdapter(adapter);
當我打開抽屜時,它只會顯示一個空白頁。 如果我將適配器更改為字符串的ArrayAdapter
並膨脹內置布局,則它可以工作,但是我想在文本旁邊添加圖像。
我的經歷也遇到過類似的問題。
我通過更改解決了這個問題:
public class NavigationAdapter extends ArrayAdapter<NavItem> {
}
至 :
public class NavigationAdapter extends BaseAdapter<NavItem> {
}
我從適用於我的情況的BaseAdapter類擴展了自定義適配器。 如果您也可以嘗試此操作
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