Activity + fragment + listview + adapter + bean routines in the same class, fragmentlistview

Activity + fragment + listview + adapter + bean routines in the same class, fragmentlistview

1. xml

Activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
</FrameLayout>

Fargment_main.xml

<?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="match_parent">
  <ListView
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:id="@+id/list"></ListView>
</LinearLayout>

List_item_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="8dp" >

    <TextView
        android:id="@+id/text1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="TEXT1"
        android:textSize="16sp" />
    <TextView
        android:id="@+id/text2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/text1"
        android:layout_below="@+id/text1"
        android:text="TEXT2"
        android:textSize="12sp" />

</RelativeLayout>

2. java

MainActivity. java

Public class MainActivity extends FragmentActivity {
MapView mMapView = null;
Private BaiduMap mBaiduMap;

@ Override
Protected void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
// Initialize the context information before using the SDK components and pass in the ApplicationContext
// Note that this method must be implemented before the setContentView method.
SetContentView (R. layout. activity_main );
If (savedInstanceState = null ){
Getsuppfrfragmentmanager (). beginTransaction (). add (R. id. container, new PlaceholderFragment (). commit ();
}

}

Public static class PlaceholderFragment extends Fragment implements AdapterView. OnItemClickListener {
Private ListView listView;
Private MainAdapter adapter;
@ Nullable
@ Override
Public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState ){
View view = inflater. inflate (R. layout. fragment_main, container, false );
ListView = (ListView) view. findViewById (R. id. list );
Adapter = new MainAdapter (getContext (), R. layout. list_item_main, getDateBean ());
ListView. setAdapter (adapter );
ListView. setOnItemClickListener (this );
Return view;
}
Public static List <DataBean> getDateBean (){
List <DataBean> list = new ArrayList <> ();
List. add (new DataBean ("basic map function", "Create a Baidu map and manage the map lifecycle "));
List. add (new DataBean ("layer display", "display common diagram, satellite diagram, traffic flow diagram, Baidu urban heat map "));
List. add (new DataBean ("map operation function", "describes basic map control methods "));
Return list;
}

@ Override
Public void onItemClick (AdapterView <?> Parent, View view, int position, long id ){
Intent intent;
Switch (position ){
Case 0:
Intent = new Intent (getActivity (), BaseMap. class );
StartActivity (intent );
Break;
Case 1:
Intent = new Intent (getActivity (), Layers. class );
StartActivity (intent );
Break;
Case 2:
Intent = new Intent (getActivity (), Location. class );
StartActivity (intent );
Break;
Default:
Break;
}
}
}

Public static class MainAdapter extends ArrayAdapter <DataBean> {
Private int resourceID;
Public MainAdapter (Context context, int resource, List <DataBean> objects ){
Super (context, resource, objects );
ResourceID = resource;
}

@ Override
Public View getView (int position, View convertView, ViewGroup parent ){
ViewHolder holder;
If (convertView = null ){
ConvertView = View. inflate (getContext (), resourceID, null );
Holder = new ViewHolder ();
Holder. text1 = (TextView) convertView. findViewById (R. id. text1 );
Holder. text2 = (TextView) convertView. findViewById (R. id. text2 );
ConvertView. setTag (holder );
} Else {
Holder = (ViewHolder) convertView. getTag ();
}
DataBean dataBean = getItem (position );
Holder. text1.setText (dataBean. text1 );
Holder. text2.setText (dataBean. text2 );
Return convertView;
}

Class ViewHolder {
TextView text1;
TextView text2;
}
}
Public static class DataBean {
String text1;
String text2;

Public DataBean (String text1, String text2 ){
This. text1 = text1;
This. text2 = text2;
}
}

}