Android字段无法解析或不是字段

Question

出于某种原因，当我尝试为按钮ButtonAddItem定义onclick侦听器，然后尝试添加使用EditText EditTextAddItem的调用方法时，我收到错误

Description Resource    Path    Location    Type
EditTextAddItem cannot be resolved or is not a field

//这里的完整代码

    public class MainActivity extends ActionBarActivity {

    //variables
        EditText EditTextAddItem;
        Button ButtonAddItem;
        ListView ListItems;

    //array to store items
        ArrayList<String> ArrItems;
        ArrayAdapter<String> ArrAdapt;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

    //define variables
            EditTextAddItem = (EditText) findViewById(R.id.editTextAddItem);
            ButtonAddItem = (Button) findViewById(R.id.buttonAddItem);
            ListItems = (ListView) findViewById(R.id.listView);

    //set arraylist with listview
            ArrItems = new ArrayList<String>();
            ArrAdapt = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, ArrItems);
            ListItems.setAdapter(ArrAdapt);

    //onclick listener
            ButtonAddItem.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    addItem(this.EditTextAddItem.getText().toString());

                }
            });

//AddItems to listview method
    private void addItem(String item){
        if(item.length() > 0){
            this.ArrItems.add(item);
            this.ArrAdapt.notifyDataSetChanged();
            this.EditTextAddItem.setText("");
        }
}


        }

Answer 1

您的问题是您正在尝试查找OnClickListener的成员EditTextAddItem。你需要通过在this前面添加父类的名称来告诉它查看父类：

@Override
public void onClick(View v) {
     // TODO Auto-generated method stub
     addItem(MainActivity.this.EditTextAddItem.getText().toString());

}