MultiChoiceArrayAdapter其实就是可以多选的ArrayAdapter了，ArrayAdpter我们已经很熟悉了。MultiChoiceArrayAdapter这个类是抽象类，所以使用前必须要继承。下面是使用MultiChoiceArrayAdapter的步骤：
0.用自定义的控件来写一个layout
1.写一个类来继承MultiChoiceArrayAdapter
2.实例化这个类
3.用setAdapterView()来设置要加载适配器的控件。
4.写上保存的方法
@Override
protected void onSaveInstanceState(Bundle outState) {
actionModeAdapter.save(outState);
}
零、写布局文件
listview_actionmode_layout.xml
没什么特别的，就一个listview
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/actionMode_listView"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</ListView>
</LinearLayout>
item.xml
注意这里要用自己定义的实现了Checkable接口的控件
<?xml version="1.0" encoding="utf-8"?>
<com.manuelpeinado.multichoiceadapter.view.CheckableLinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/custom_list_item_background"
android:orientation="horizontal">
<!-- 上面必须要用自定义的layout，否则不会有选中的效果！！！ -->
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp"
android:orientation="horizontal" >
<TextView
android:id="@+id/item_textView"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_marginLeft="30dp"
android:layout_gravity="center_vertical"
android:textColor="#000000"
android:layout_weight="1"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
</com.manuelpeinado.multichoiceadapter.view.CheckableLinearLayout>
二、继承MultiChoiceAdapter
这个是重点，每个方法中实现了不同的功能。其中discardSelectedItems()是自己写的，用来移除已经选中的items。
注意：onCreateActionMode()必须返回true，否则报错！
private class TestAdapter extends MultiChoiceArrayAdapter<String>{
String tag = getClass().getSimpleName().toString();
/**
* @param savedInstanceState
* @param context
* @param resource：Item的布局文件，即 R.layout.xxx
* @param textViewResourceId：显示文字的textview的id，即R.id.xxxx
* @param objects：一个String数组
*/
public TestAdapter(Bundle savedInstanceState, Context context,
int resource, int textViewResourceId, String[] objects) {
//为了避免错误，这里将String数组转为ArrayList对象
this(savedInstanceState,context,resource,textViewResourceId,
new ArrayList<String>(Arrays.asList(objects)));
}
/**
* @param savedInstanceState
* @param context
* @param resource：Item的布局文件，即 R.layout.xxx
* @param textViewResourceId：显示文字的textview的id，即R.id.xxxx
* @param items：一个list<String>对象
*/
public TestAdapter(Bundle savedInstanceState, Context context,
int resource, int textViewResourceId, List<String> items) {
super(savedInstanceState, context, resource, textViewResourceId, items);
}
/**
* 传入actionMode对象，进行设置图标和操作
* 注意要返回true！
*/
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
Log.i(tag, "onCreateActionMode");
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.my_action_mode, menu);
//这里必须要写true，否则会报空指针！！！
return true;
}
/**
* 进行AndroidMode上图标操作的设置
*/
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
if (item.getItemId() == R.id.menu_share) {
Toast.makeText(getContext(), "分享了" + getCheckedItemCount()+"个item", Toast.LENGTH_SHORT).show();
return true;
}
if (item.getItemId() == R.id.menu_discard) {
//丢弃选中的items
discardSelectedItems();
return true;
}
return false;
}
@Override
public boolean onPrepareActionMode(ActionMode arg0, Menu arg1) {
Log.i(tag, "onPrepareActionMode");
return false;
}
/**
* （非必须）
* 设置点击、选中效果，非必须。如果你在item的layout设置了 android:background那么下面就不用进行设置背景了
* 个人推荐在item的layout中设置背景色，example：android:background="@drawable/custom_list_item_background"
*/
/*@Override
protected View getViewImpl(int position, View convertView, ViewGroup parent) {
//Log.i(tag, "getViewImpl");
View view = super.getViewImpl(position, convertView, parent);
view.setBackgroundResource(R.drawable.custom_list_item_background);
return view;
}*/
/**
* 从适配器中移除某些item
*/
private void discardSelectedItems() {
//得到选中的items
Set<Long> selection = getCheckedItems();
String[] items = new String[selection.size()];
int i = 0;
for (long position : selection) {
items[i++] = getItem((int)position);
}
//通过判断名字来remove掉这些items
for (String item : items) {
/**
* 这里用remove时要注意传入适配器的不能是String[] items对象。否则会报错
* 这里我已经在构造函数中进行了处理，传入String数组也不会出错了~
*/
remove(item);
}
finishActionMode();
}
}
这里在继承的时候其实就顺带实现了ActionMode的callback接口的内容了，如果对ActionMode熟悉的人一定很容易理解。
二、实例化这个类
TestAdapter actionModeAdapter;
String[] data = {"android","ios","wp","c++",
"java","c#","javascript","vb",
"delphi","PB","ASP","SQL"};
ListView actionModelistView = (ListView)findViewById(R.id.actionMode_listView);
actionModeAdapter = new TestAdapter(savedInstanceState, this,R.layout.item, R.id.item_textView, data);
三、设置控件和监听器
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listview_actionmode_layout);
String[] data = {"android","ios","wp","c++",
"java","c#","javascript","vb",
"delphi","PB","ASP","SQL"};
ListView actionModelistView = (ListView)findViewById(R.id.actionMode_listView);
actionModeAdapter = new TestAdapter(savedInstanceState, this,R.layout.item, R.id.item_textView, data);
actionModeAdapter.setAdapterView(actionModelistView);
actionModeAdapter.setOnItemClickListener(new MyItemClick(actionModeAdapter));
//listView.setAdapter(adapter);//不这么用啦
}
/**
* @author:Jack Tony
* @tips :点击事件的监听器
* @date :2014-10-20
*/
private class MyItemClick implements OnItemClickListener{
private TestAdapter mAdapter;
public MyItemClick(TestAdapter adapter) {
mAdapter = adapter;
}
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
Toast.makeText(getApplicationContext(), "点击了: " + mAdapter.getItem(position), Toast.LENGTH_SHORT).show();
}
}
四、保存的方法
@Override
protected void onSaveInstanceState(Bundle outState) {
actionModeAdapter.save(outState);
}
于是大功告成！下面是全部代码：
ArrayAdapterTestActivity.java （这个类没用兼容模式，如果用兼容模式请参考顶部的注释，其实就是导入不同的包即可）
package com.kale.multichoiceadaptertest;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.ActionMode;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.Toast;
import com.manuelpeinado.multichoiceadapter.normal.MultiChoiceArrayAdapter;
/**
* 如果是4.0以上的版本可以直接用activity，不用actionbarActivity，导入的时候导入
* import android.view.ActionMode;
* import com.manuelpeinado.multichoiceadapter.normal.MultiChoiceArrayAdapter;
* 把
* import android.support.v7.view.ActionMode;
* import com.manuelpeinado.multichoiceadapter.compat.MultiChoiceArrayAdapter;
* 删掉
*/
/**
* @author:Jack Tony
* @tips :ActionMode和ArrayAdapter配合实现多选
* @date :2014-10-21
*/
public class ArrayAdapterTestActivity extends Activity{
TestAdapter actionModeAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listview_actionmode_layout);
String[] data = {"android","ios","wp","c++",
"java","c#","javascript","vb",
"delphi","PB","ASP","SQL"};
ListView actionModelistView = (ListView)findViewById(R.id.actionMode_listView);
actionModeAdapter = new TestAdapter(savedInstanceState, this,R.layout.item, R.id.item_textView, data);
actionModeAdapter.setAdapterView(actionModelistView);
actionModeAdapter.setOnItemClickListener(new MyItemClick(actionModeAdapter));
//listView.setAdapter(adapter);//不这么用啦
}
@Override
protected void onSaveInstanceState(Bundle outState) {
actionModeAdapter.save(outState);
}
private class TestAdapter extends MultiChoiceArrayAdapter<String>{
String tag = getClass().getSimpleName().toString();
/**
* @param savedInstanceState
* @param context
* @param resource：Item的布局文件，即 R.layout.xxx
* @param textViewResourceId：显示文字的textview的id，即R.id.xxxx
* @param objects：一个String数组
*/
public TestAdapter(Bundle savedInstanceState, Context context,
int resource, int textViewResourceId, String[] objects) {
//为了避免错误，这里将String数组转为ArrayList对象
this(savedInstanceState,context,resource,textViewResourceId,
new ArrayList<String>(Arrays.asList(objects)));
}
/**
* @param savedInstanceState
* @param context
* @param resource：Item的布局文件，即 R.layout.xxx
* @param textViewResourceId：显示文字的textview的id，即R.id.xxxx
* @param items：一个list<String>对象
*/
public TestAdapter(Bundle savedInstanceState, Context context,
int resource, int textViewResourceId, List<String> items) {
super(savedInstanceState, context, resource, textViewResourceId, items);
}
/**
* 传入actionMode对象，进行设置图标和操作
* 注意要返回true！
*/
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
Log.i(tag, "onCreateActionMode");
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.my_action_mode, menu);
//这里必须要写true，否则会报空指针！！！
return true;
}
/**
* 进行AndroidMode上图标操作的设置
*/
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
if (item.getItemId() == R.id.menu_share) {
Toast.makeText(getContext(), "分享了" + getCheckedItemCount()+"个item", Toast.LENGTH_SHORT).show();
return true;
}
if (item.getItemId() == R.id.menu_discard) {
//丢弃选中的items
discardSelectedItems();
return true;
}
return false;
}
@Override
public boolean onPrepareActionMode(ActionMode arg0, Menu arg1) {
Log.i(tag, "onPrepareActionMode");
return false;
}
/**
* （非必须）
* 设置点击、选中效果，非必须。如果你在item的layout设置了 android:background那么下面就不用进行设置背景了
* 个人推荐在item的layout中设置背景色，example：android:background="@drawable/custom_list_item_background"
*/
/*@Override
protected View getViewImpl(int position, View convertView, ViewGroup parent) {
//Log.i(tag, "getViewImpl");
View view = super.getViewImpl(position, convertView, parent);
view.setBackgroundResource(R.drawable.custom_list_item_background);
return view;
}*/
/**
* 从适配器中移除某些item
*/
private void discardSelectedItems() {
//得到选中的items
Set<Long> selection = getCheckedItems();
String[] items = new String[selection.size()];
int i = 0;
for (long position : selection) {
items[i++] = getItem((int)position);
}
//通过判断名字来remove掉这些items
for (String item : items) {
/**
* 这里用remove时要注意传入适配器的不能是String[] items对象。否则会报错
* 这里我已经在构造函数中进行了处理，传入String数组也不会出错了~
*/
remove(item);
}
finishActionMode();
}
}
/**
* @author:Jack Tony
* @tips :点击事件的监听器
* @date :2014-10-20
*/
private class MyItemClick implements OnItemClickListener{
private TestAdapter mAdapter;
public MyItemClick(TestAdapter adapter) {
mAdapter = adapter;
}
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
Toast.makeText(getApplicationContext(), "点击了: " + mAdapter.getItem(position), Toast.LENGTH_SHORT).show();
}
}
}
时间： 2024-10-19 02:32:03