我正在开发一个小应用程序,其中包含带有NavigationDrawer
的活动,并使用FragmentManager
和FragmentTrancation
在该活动上放置了一个片段。问题是,我在片段中放置了一个GridView
,但它并没有出现。
这是我的主要活动类。
public class Main extends Activity {
DrawerLayout drawerlayout;
ListView LVdrawer;
ImageView toplogo;
View rL;
FragmentManager FM = getFragmentManager();
FragmentTransaction Trans = FM.beginTransaction();
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.navigation_drawer);
AddApps Aapps = new AddApps();
drawerlayout = (DrawerLayout) findViewById(R.id.drawer_layout);
LVdrawer = (ListView) findViewById(R.id.left_drawer);
LVdrawer.setAdapter(new CustomAdapter(this, 1));
Trans.add(R.id.content_frame, Aapps, "AddAppsF");
Trans.addToBackStack("AddApps");
Trans.commit();
}
片段类:
public class AddApps extends Fragment {
GridView grid;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View addapp=inflater.inflate(R.layout.addbusiness, container, false);
grid=(GridView) addapp.findViewById(R.id.gridView1);
return addapp;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
grid.setAdapter(new Customadapter(getActivity()));
}
}
class Customadapter extends BaseAdapter {
ArrayList<Row> row;
String[] names;
Context c;
int[] ids;
private LayoutInflater inflater;
public Customadapter(Context c) {
// TODO Auto-generated constructor stub
this.c = c;
inflater=LayoutInflater.from(c);
row = new ArrayList<Row>();
names = new DrawerData().getnames();
ids = new DrawerData().getids();
for (int i = 0; i < ids.length; i++) {
row.add(new Row(names[i], ids[i]));
}
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return row.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return row.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder1 holder = null;
View singleview = convertView;
if (convertView == null) {
singleview = inflater.inflate(R.layout.singleapp, parent, false);
holder = new ViewHolder1(singleview);
singleview.setTag(holder);
}
else {
holder = (ViewHolder1) singleview.getTag();
}
Row rr = row.get(position);
holder.img.setImageResource(rr.imageid);
holder.det.setText(rr.names);
return singleview;
}
}
class ViewHolder1 {
ImageView img;
TextView det;
ViewHolder1(View v) {
img = (ImageView) v.findViewById(R.id.detail_logo);
det = (TextView) v.findViewById(R.id.detail);
}
}
View addapp=inflater.inflate(R.layout.addbusiness, container, false);
替换为View addapp=inflater.inflate(R.layout.some_dummy_layout, container, false);
?其中some_dummy_layout
是一个只包含简单文本视图的布局。这样做只是为了检查该片段是否正常工作。 - mromer