java - Android基于baseAdapter在FRAGMENT中自定义Layout

Question

我想在 ListFragment 类的扩展中使用自定义 ListView。在创建新的子类从 BaseAdapter 扩展到当前类并将布局设置为我得到 ... has stopped 错误之后。

list_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:orientation="vertical"
        >
    <TextView xmlns:android="http://schemas.android.com/apk/res/android"
              android:id="@+id/txt1"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:gravity="center_vertical"/>
    <TextView xmlns:android="http://schemas.android.com/apk/res/android"
              android:id="@+id/txt2"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:gravity="center_vertical"/>
</LinearLayout>

ResivedSMS.java :

public class ResivedSMS extends ListFragment {
    private String testArray1[];
    private String testArray2[];
    private ListView listFragment;

    public ResivedSMS() {

        testArray1 = new String[] {
                "1111111111",
                "2222222222",
                "3333333333",
                "4444444444",
                "5555555555",
                "6666666666",
        };
        testArray1 = new String[] {
                "AAAAA",
                "BBBBB",
                "CCCCC",
                "DDDDD",
                "FFFFF",
                "GGGGG",
        };

    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        listFragment = (ListView) inflater.inflate(
                R.layout.list_fragment, container, false);
        ViewResivedSMSDetailes customListView = new ViewResivedSMSDetailes(getActivity(),testArray1,testArray2);
        listFragment.
                setAdapter( customListView );

        return listFragment;
    }

    @Override
    public void onListItemClick(ListView list, View v, int position, long id) {

        Toast.makeText(getActivity(), getListView().getItemAtPosition(position).toString(), Toast.LENGTH_LONG).show();
    }

    class ViewResivedSMSDetailes extends BaseAdapter
    {

        private LayoutInflater inflater;
        private String[] values1;
        private String[] values2;
        private class ViewHolder {
            TextView txt1;
            TextView txt2;
        }

        public ViewResivedSMSDetailes(Context context,String[] values1,String[] values2)
        {

            this.values1=values1;
            this.values2=values2;
            inflater = LayoutInflater.from(context);
        }
        @Override
        public int getCount() {
            return values1.length;
        }

        @Override
        public Object getItem(int index) {
            return values1[index];
        }

        @Override
        public long getItemId(int arg0) {
            return arg0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent)
        {
            ViewHolder holder = null;
            if(convertView ==null){
                holder = new ViewHolder();
                convertView = inflater.inflate(R.layout.list_fragment, null);
                holder.txt1 = (TextView)convertView.findViewById(R.id.txt1);
                holder.txt2 = (TextView)convertView.findViewById(R.id.txt2);
                convertView.setTag(holder);
            }
            holder = (ViewHolder) convertView.getTag();
            holder.txt1.setText(values1[position]);
            holder.txt2.setText(values2[position]);

            return convertView;
        }

    }
}

logcat 结果:

08-24 10:33:34.675      349-349/ir.tsms E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.ClassCastException: android.widget.LinearLayout
            at ir.tsms.ResivedSMS.onCreateView(ResivedSMS.java:50)

ResivedSMS.java:50 是:

listFragment = (ListView) inflater.inflate(
                R.layout.list_fragment, container, false);

我的代码有什么问题以及如何解决谢谢？

Answer 1

问题:

inflater.inflate(R.layout.list_fragment, container, false);

你正在膨胀 LinearLayout 而不是 ListView 从而给你 ClassCastException

解决方法:

由于您使用的是 ListFragment，因此您可以直接设置适配器，因为 ListFragment 有自己的默认 ListView。在 onCreate 方法中设置适配器。

示例:

 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ViewResivedSMSDetailes customListView = new ViewResivedSMSDetailes(getActivity(),testArray1,testArray2);
        setListAdapter( customListView ); //call the method if listFragment

    }