Question

我有一个列表视图和一个textview显示的数组。我希望在列表视图中选择每个项目，将值添加到textview中显示的计数器。例如，如果我在listView中选择“THREE”，则texview必须显示“Value is 3”，如果我也选择“TWO”，则texview显示“Value is 5”（3 + 2）。

我已经创建了第二个listview_array，其值已经尝试传递给整数，但它不起作用。有什么想法或帮助吗？

这是我的问题的代码：

package com.javaya.proyecto002;

import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.TextView;

 ;

public class activity2 extends Activity {

    TextView tv1;
    ListView lv1;
    int counter;
    int counter2;
    String listview_array[] = { "ONE", "TWO", "THREE", "FOUR", "FIVE", "SIX",
            "SEVEN", "EIGHT", "NINE", "TEN" };
    String listview_array2[] = { "1", "2", "3", "4", "5", "6",
            "7", "8", "9", "10" };

    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity2);

        tv1 = (TextView)findViewById(R.id.textView1); 
        counter = 0;
        lv1 = (ListView) findViewById(R.id.listView1);
        lv1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_activated_1, listview_array));
        lv1.setChoiceMode(lv1.CHOICE_MODE_MULTIPLE);
        lv1.setOnItemClickListener(new OnItemClickListener(){

        private String[] listview_array2 = { "1", "2", "3", "4", "5", "6",
                "7", "8", "9", "10" };

        public void onItemClick(AdapterView<?> arg0, View v, int position, long id){

         if (lv1.isItemChecked(position)); String name = this.listview_array2[position];
          counter2 = Integer.parseInt(name);
          counter = counter + counter2;
          tv1.setText("Total " + counter);


        }
                                        });

    }
            }

Answer 1

而不是：

String name = listview_array2.getItemAtPosition(position).toString();

使用：

String name = this.listview_array2[position];

从Listview多项选择向TextView添加数字

1 个答案: