使用AutoCompleteTextView android时出现NullPointerException

Question

例外

09-09 23:55:25.336: E/AndroidRuntime(14983): java.lang.NullPointerException
09-09 23:55:25.336: E/AndroidRuntime(14983):    at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:353)
09-09 23:55:25.336: E/AndroidRuntime(14983):    at android.widget.ArrayAdapter.getView(ArrayAdapter.java:323)
09-09 23:55:25.336: E/AndroidRuntime(14983):    at android.widget.AbsListView.obtainView(AbsListView.java:1430)
09-09 23:55:25.336: E/AndroidRuntime(14983):    at android.widget.AutoCompleteTextView$DropDownListView.obtainView(AutoCompleteTextView.java:1656)
09-09 23:55:25.336: E/AndroidRuntime(14983):    at android.widget.ListView.measureHeightOfChildren(ListView.java:1264)

代码

    fromAutoComplete = new AutoComplete(
            this, // R.layout.fromautocomplete,
            android.R.layout.simple_list_item_single_choice,
            R.id.fromautocomplete);
    fromAutoComplete.setNotifyOnChange(true);
    fromAddress = (AutoCompleteTextView) findViewById(R.id.fromAddress);
    fromAddress.setAdapter(fromAutoComplete);
    fromAddress.setOnItemClickListener(this);
    fromAddress.setOnFocusChangeListener(this);
    fromAddress.setOnClickListener(this);
    toAutoComplete = new AutoComplete(this,
            android.R.layout.simple_list_item_single_choice,
            // R.layout.toautocomplete,
            R.id.toautocomplete);
    toAutoComplete.setNotifyOnChange(true);
    toAddress = (AutoCompleteTextView) findViewById(R.id.toAddress);
    toAddress.setAdapter(toAutoComplete);
    toAddress.setOnItemClickListener(this);
    toAddress.setOnFocusChangeListener(this);
    toAddress.setOnClickListener(this);

自动完成（一些相关的代码行）

public class AutoComplete extends ArrayAdapter<String> implements Filterable {

public AutoComplete(Activity activity, int layout, int textViewResourceId) {
    super(activity, layout, textViewResourceId);
    //super(activity, textViewResourceId);  
}

结果

1. toaddress工作正常，
2. fromaddress crash＆＃39;

显然这是一个自动完成的东西，所以它不会在代码中崩溃，而是在通货膨胀

编辑：通过

解决问题

    toAutoComplete = new AutoComplete(this,            
        R.layout.toautocomplete,
        R.id.toautocomplete);
    fromAutoComplete = new AutoComplete(
            this, R.layout.fromautocomplete,
            R.id.fromautocomplete);

Answer 1

编辑：通过

解决问题

toAutoComplete = new AutoComplete(this,            
    R.layout.toautocomplete,
    R.id.toautocomplete);
fromAutoComplete = new AutoComplete(
        this, R.layout.fromautocomplete,
        R.id.fromautocomplete);