Question

我的ListView从ListFragment延伸，并且从BaseAdapter扩展的customAdapter的子类后，无法将两个数组解析为布局元素。

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>

setListAdapter功能：

public class ResivedSMS extends ListFragment {
.
.
.
public ResivedSMS() {
    testArray1 = new String[] {
            "1111111111",
            "2222222222",
            "3333333333",
            "4444444444",
            "5555555555",
            "6666666666",
    };
    testArray2 = new String[] {
            "AAAAA",
            "BBBBB",
            "CCCCC",
            "DDDDD",
            "FFFFF",
            "GGGGG",
    };
}
.
.
.

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

    }

.
.
.

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;
    }

}

更新帖子：

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>

logCat结果：

08-24 14:48:03.245      851-851/ir.tsms E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.NullPointerException
            at ir.tsms.ResivedSMS$ViewResivedSMSDetailes.getView(ResivedSMS.java:105)

ResivedSMS.java:105是：

holder.txt2.setText(values2[position]);

Answer 1

从getView()回调方法中的视图膨胀时看，您没有设置ViewGroup父级。

尝试更改以下行：

convertView = inflater.inflate(R.layout.list_fragment, null);

要：

convertView = inflater.inflate(R.layout.list_fragment, parent,false);

我建议创建两个视图的共享类，并且只有一个数据集而不是两个数据集，以避免索引超出范围的异常。

Android将两个数组解析为ListView

1 个答案: