listview + checkbox

1.ArrayAdapter+ListView+CheckBox

ANDROID: MULTIPLE SELECTION LISTVIEW

http://theopentutorials.com/tutorials/android/listview/android-multiple-selection-listview/

Contents [hide]

• 1 Project Description
• 2 Environment Used
• 3 Prerequisites
• 4 Create Android Project
  • 4.1 strings.xml
  • 4.2 XML layout files
    • 4.2.1 main.xml
    • 4.2.2 result.xml
  • 4.3 AndroidManifest.xml
  • 4.4 Activity classes
    • 4.4.1 ListViewMultipleSelectionActivity.java
    • 4.4.2 ResultActivity.java
• 5 Output
• 6 Project Folder Structure

Project Description

• In the previous Android ListView examples, we created ListView with single selection mode.
• In this example, we will create a ListView with multiple selection mode with button click event. On button click event, we retrieve the selected list view items and create a Bundle with array of selected items and store it in Intent and start another activity (ResultActivity).
• ResultActivity retrieves the array and displays the result in ListView.

Environment Used

• JDK 6 (Java SE 6)
• Eclipse Indigo IDE for Java EE Developers (3.7.1)
• Android SDK 4.0.3 / 4.1 Jelly Bean
• Android Development Tools (ADT) Plugin for Eclipse (ADT version 20.0.0)
• Refer this link to setup the Android development environment

Prerequisites

• HelloWorld Example
• Android: Create ListView in XML and populate items using ArrayAdapter

Create Android Project

• Create a new Android Project and name it as “ListViewMultipleSelection“.
• Enter the package name as “com.theopentutorials.android“.
• Enter the Activity name as “ListViewMultipleSelectionActivity“.
• Click Finish.

strings.xml

Open res/values/string.xml and replace it with following content.

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, ListViewMultipleSelectionActivity!</string>
    <string name="app_name">ListViewMultipleSelection</string>
    <string name="result_activity">ResultActivity</string>
    <string name="submit">Submit</string>
    
    <string-array name="sports_array">
        <item>Shuttle Badminton</item>
        <item>Tennis</item>
        <item>Table Tennis</item>
        <item>Basket Ball</item>
        <item>Foot Ball</item>
        <item>Volley Ball</item>
        <item>Hockey</item>        
        <item>Swimming</item>
    </string-array>
</resources>

XML layout files

This application uses two layout files,

res/layout/main.xml	Represents first screen used by ListViewMultipleSelectionActivity.java
res/layout/result.xml	Represents second screen used by ResultActivity.java

main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <Button
        android:id="@+id/testbutton"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:text="@string/submit" />

    <ListView
        android:id="@+id/list"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_above="@id/testbutton"
        android:layout_alignParentTop="true" 
        />		
</RelativeLayout>

result.xml

<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/outputList"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" />

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.theopentutorials.android"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="15" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".ListViewMultipleSelectionActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".ResultActivity"
            android:label="@string/result_activity" >
        </activity>        
    </application>

</manifest>

Activity classes

ListViewMultipleSelectionActivity.java

package com.theopentutorials.android;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.SparseBooleanArray;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

public class ListViewMultipleSelectionActivity extends Activity implements
		OnClickListener {
	Button button;
	ListView listView;
	ArrayAdapter<String> adapter;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		findViewsById();

		String[] sports = getResources().getStringArray(R.array.sports_array);
		adapter = new ArrayAdapter<String>(this,
				android.R.layout.simple_list_item_multiple_choice, sports);
		listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
		listView.setAdapter(adapter);

		button.setOnClickListener(this);
	}

	private void findViewsById() {
		listView = (ListView) findViewById(R.id.list);
		button = (Button) findViewById(R.id.testbutton);
	}

	public void onClick(View v) {
		SparseBooleanArray checked = listView.getCheckedItemPositions();
		ArrayList<String> selectedItems = new ArrayList<String>();
		for (int i = 0; i < checked.size(); i++) {
			// Item position in adapter
			int position = checked.keyAt(i);
			// Add sport if it is checked i.e.) == TRUE!
			if (checked.valueAt(i))
				selectedItems.add(adapter.getItem(position));
		}

		String[] outputStrArr = new String[selectedItems.size()];

		for (int i = 0; i < selectedItems.size(); i++) {
			outputStrArr[i] = selectedItems.get(i);
		}

		Intent intent = new Intent(getApplicationContext(),
				ResultActivity.class);

		// Create a bundle object
		Bundle b = new Bundle();
		b.putStringArray("selectedItems", outputStrArr);

		// Add the bundle to the intent.
		intent.putExtras(b);

		// start the ResultActivity
		startActivity(intent);
	}
}

• To load the list view items, we first get the string array resource and used it in ArrayAdapter. We use the list view row layout provided by the Android system (android.R.layout.simple_list_item_multiple_choice) and setting the selection mode as multiple using ListView.CHOICE_MODE_MULTIPLE.
• We invoke getCheckedItemPositions() on list view object which returns the set of checked items (as SparseBooleanArray) in the list

ResultActivity.java

package com.theopentutorials.android;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class ResultActivity extends Activity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.result);

		Bundle b = getIntent().getExtras();
		String[] resultArr = b.getStringArray("selectedItems");
		ListView lv = (ListView) findViewById(R.id.outputList);

		ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
				android.R.layout.simple_list_item_1, resultArr);
		lv.setAdapter(adapter);
	}
}

Output

Run your application
First Screen

Second Screen

Project Folder Structure

The complete folder structure of this example is shown below.

Related Posts:

1. Android: Create ListView in XML and populate items using ArrayAdapter
2. Android: Creating and populating ListView items in XML
3. Android: ListView in ListActivity
4. Android: Sending data from one Activity to another

---

2.BaseAdapter+ListView+CheckBox:

http://schimpf.es/listview-with-checkboxes-inside/  < -안들어가짐

---

3.使用ViewBinder添加CheckBox：

http://hi.baidu.com/xghhy/item/391caf9db4c36cdc1e427179

摘要： Android Email app 来举个例子，这种app需要的基本功能中有 1. 从服务器接收的Email数据保存在本地数据库里面(SQLite) 2. Email数据中除了内容以外还会有一个boolean 变量（也可以用int 0/1 代替）来标记“已读”“未读”。

简单来说从SQLite里面读取已读变量，让系统在app中的List上画一个Checkbox。（根据SQLite里面的数据）

 

1. 首先定义一个 SimpleCursorAdapter.ViewBinder

 SimpleCursorAdapter.ViewBinder viewBinder = new SimpleCursorAdapter.ViewBinder() {
  
  @Override
  public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
   if(view instanceof CheckBox) {
    CheckBox checkbox = (CheckBox)view;
    int value = cursor.getInt(columnIndex);
    if(value==1) {
     checkbox.setChecked(true);
     return true;
    }
    else if(value==0) {
     checkbox.setChecked(false);
     return true;
    }
    else
     return false;
   }
   return false;
  }
 };

 

注：Cursor的可以有好几个行，这里的columnIndex表示一个行的索引。

 

2. 下面定义一个SimpleCursorAdapter本身 然后利用 SimpleCursorAdapter.setViewBinder()来套用之前定义的ViewBinder。

  SimpleCursorAdapter simpleCursorAdapter = new SimpleCursorAdapter(this, R.layout.list_item,
    notificationCursor, new String[] { "subject", "content", "date", "unread"},
    new int[] {R.id.subject, R.id.content, R.id.date, R.id.unread});
  simpleCursorAdapter.setViewBinder(viewBinder);

注：这里的R.id.unread是指布局xml文件的里的CheckBox部件。 R.id.subject, R.id.content, R.id.date是其他Email数据。

  ListAdapter adapter = simpleCursorAdapter;

  setListAdapter(adapter); // Activity 是 ListActivity

3. 这样就完事了，下面的二行是ListAdapter的老规矩，简单吧。

---

3.ListView+SimpleCursorAdapter+checkbox：

【android】ListView+SimpleCursorAdapter+checkbox实现批量删除

http://blog.csdn.net/chdjj/article/details/16356797

最近项目有个需求。

实现对笔记列表进行批量删除，功能本身实现比较容易。

网上也有很多demo参考。但是这个项目不太一样，因为使用的是SimpleCursorAdapter绑定ListView，网上大多数都是ArrayAdapter、SimpleAdapter、BaseAdapter的例子。故而这里有必要记录一下解决的办法。

先来看下别人怎么实现的：

实现批批量删除网上大致有以下几种方式：

1.ArrayAdapter+ListView+CheckBox:http://theopentutorials.com/tutorials/android/listview/android-multiple-selection-listview/

2.BaseAdapter+ListView+CheckBox:http://schimpf.es/listview-with-checkboxes-inside/

3.使用ViewBinder添加CheckBox：http://hi.baidu.com/xghhy/item/391caf9db4c36cdc1e427179

---------------------------------------------------------------------------

解决方法：

1.继承SimpleCursorAdapter，重写getView方法

2.在自定义的适配器中添加一个集合，保存被选中的listView条目的id

3.对外提供一个获取被选中条目id集合的方法

[java] view plaincopy

1. public class CheckBoxAdapter4TextNote extends SimpleCursorAdapter  
2.    {  
3.        private ArrayList<Integer> selection = new ArrayList<Integer>();//记录被选中条目id  
4.        private int mCheckBoxId = 0;//listView条目的样式对应的xml资源文件名（必须包含checkbox）  
5.        private String mIdColumn;//数据库表的id名称  
6.        public CheckBoxAdapter4TextNote(Context context, int layout, Cursor c,  
7.                String[] from, int[] to, int checkBoxId, String idColumn,  
8.                int flags)  
9.        {  
10.            super(context, layout, c, from, to, flags);  
11.            mCheckBoxId = checkBoxId;  
12.            mIdColumn = idColumn;  
13.        }  
14.        @Override  
15.        public int getCount()  
16.        {  
17.            return super.getCount();  
18.        }  
19.        @Override  
20.        public Object getItem(int position)  
21.        {  
22.            return super.getItem(position);  
23.        }  
24.        @Override  
25.        public long getItemId(int position)  
26.        {  
27.            return super.getItemId(position);  
28.        }  
29.        @Override  
30.        public View getView(final int position, View convertView,  
31.                ViewGroup parent)  
32.        {  
33.            View view = super.getView(position, convertView, parent);  
34.            final CheckBox checkbox = (CheckBox) view.findViewById(mCheckBoxId);  
35.            checkbox.setOnClickListener(new OnClickListener()  
36.            {  
37.                @Override  
38.                public void onClick(View v)  
39.                {  
40.                    Cursor cursor = getCursor();  
41.                    cursor.moveToPosition(position);  
42.                      
43.                    checkbox.setChecked(checkbox.isChecked());  
44.                    if(checkbox.isChecked())//如果被选中则将id保存到集合中  
45.                    {  
46.                        selection.add(cursor.getInt(cursor.getColumnIndex(mIdColumn)));  
47.                    }  
48.                    else//否则移除  
49.                    {  
50.                        selection.remove(new Integer(cursor.getInt(cursor.getColumnIndex(mIdColumn))));  
51.                        Toast.makeText(context, "has removed " + cursor.getInt(cursor.getColumnIndex(mIdColumn)), 0).show();  
52.                    }  
53.                }  
54.            });  
55.              
56.            return view;  
57.        }  
58. /返回集合  
59.        public ArrayList<Integer> getSelectedItems()  
60.        {  
61.            return selection;  
62.        }  
63.    }  

调用：

[java] view plaincopy

1. List<Integer> bn = XXX.getSelectedItems();  
2.  for(int id : bn)  
3. {  
4.     //TODO 执行删除操作  
5.  }  

如果没能帮到你，试试这篇文章（http://craftsman1970.blog.51cto.com/3522772/725606）。