带有复选框的ListView在Android中使用多选 [英] ListView with checkbox using multichoice in android

问题描述

这是我的代码，当我单击按钮"b"时，一个列表视图填充了每个项目的复选框，现在我想让带有复选框的项目签入另一个活动，我如何实现这一目标，我半途而废我很困惑如何做剩余的部分

here is my code, when i click button "b" a listview populates with a checkbox for each item, now i want to get items with check box checked into another activity, how do i acheive this, i came half way i'm confused how to do the remaining part

这是我的代码 XML档案:

here is my code XML file :

<Button
    android:id="@+id/b"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Pick contact" />

<ListView
    android:choiceMode="multipleChoice"
    android:id="@+id/lv"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" />

这是Java代码:

import java.util.ArrayList;
import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
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.Button;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends Activity {
Button b;
int PICK_CONTACT;
ArrayList<String> al;
ArrayAdapter<String> aa;
ListView lv;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    b = (Button) findViewById(R.id.b);

    lv = (ListView) findViewById(R.id.lv);
    al = new ArrayList<String>();



    b.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {

            displaycontacts();
            System.out.println("size" + al.size());
            aa = new ArrayAdapter<String>(MainActivity.this,
                        android.R.layout.simple_list_item_multiple_choice, al);
            lv.setAdapter(aa);


        }
    });

    lv.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int position ,long arg3) 
        {

            //here i should get the item which is checked
        }
    });

}

public void displaycontacts() {
    try {
        ContentResolver cr = getContentResolver();
        Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI, null,
                null, null, null);

        if (cur.getCount() > 0) {
            while (cur.moveToNext()) {

                String name = cur
                        .getString(cur
                                .getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
                if (Integer
                        .parseInt(cur.getString(cur
                                .getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER))) > 0) {
                    System.out.println("name : " + name);
                    al.add(name);

                }
            }

        }

    } catch (Exception e) {
        System.out.println("Error:::::::::::::::::::" + e);
    }

}
}

推荐答案

尝试使用此链接进行多项选择的列表视图. http://android-coding.blogspot.in/2011 /09/listview-with-multiple-choice.html . 让我知道您的问题是否已解决?

try this link for list view with multiple choice. http://android-coding.blogspot.in/2011/09/listview-with-multiple-choice.html. Let me know your problem is resolved or not?

这篇关于带有复选框的ListView在Android中使用多选的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！