Android Dialog实现全选反选

Android的AlertDialog中可以通过builder.setMultiChoiceItems(....)来添加一个多选项，但是并不能实现对选项的全选/反选功能，所以需要自定义一个控件。原理是通过ListView + CheckBox来实现，实现效果如下。

一、定义布局样式：

首先需要定义多选弹出框的样式，custom_mutiplechoice_view.xml：

<?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"android:background="@android:color/background_dark"><TextView android:id="@+id/mutiplechoice_title"android:layout_width="match_parent"android:layout_height="40dp"android:gravity="center_vertical"android:padding="5dp"android:background="@android:color/darker_gray"android:textSize="18sp"android:textColor="@android:color/black"android:text="标题"/><LinearLayout android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical" android:layout_margin="1dp"android:background="@android:color/background_light">  <ListView  android:id="@+id/mutiplechoice_listview"  android:layout_width="match_parent"  android:layout_height="300dp"  android:layout_weight="4"/>  <LinearLayout  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_weight="1"android:gravity="center"android:orientation="horizontal" android:background="@android:color/darker_gray">  <Button  android:id="@+id/mutiplechoice_selectall_btn"  android:layout_width="0dp"  android:layout_height="wrap_content"  android:layout_weight="1"android:text="全选" />  <Button  android:id="@+id/mutiplechoice_ok_btn"  android:layout_width="0dp"  android:layout_height="wrap_content"  android:layout_weight="1"android:text="确定" />  </LinearLayout>  </LinearLayout>
</LinearLayout>

ListView条目的样式， custom_mutiplechoice_view_list_item.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:orientation="horizontal" >  <TextView  android:id="@+id/item_tv"  android:layout_width="0dp"  android:layout_height="wrap_content"  android:layout_gravity="center_vertical"  android:layout_weight="1" android:paddingLeft="10dp"android:textColor="@android:color/black"/>  <CheckBox  android:id="@+id/item_cb"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:clickable="false"  android:focusable="false"  android:focusableInTouchMode="false"  android:gravity="center_vertical" />  </LinearLayout>

然后是定义弹出框的布局，dialog_multiplechoice.xml：

<?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:layout_margin="30dp"android:orientation="vertical" android:background="@android:color/background_light"><com.example.mutichoicedialog.CustomMultipleChoiceViewandroid:id="@+id/CustomMultipleChoiceView"android:layout_width="match_parent"android:layout_height="match_parent"></com.example.mutichoicedialog.CustomMultipleChoiceView>
</LinearLayout>

Activity主界面的布局，activity_main.xml：

<RelativeLayout 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"tools:context=".MainActivity" ><EditText android:id="@+id/text"android:layout_width="match_parent"android:layout_height="wrap_content"/><Buttonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerHorizontal="true"android:layout_centerVertical="true"android:onClick="OnViewClick"android:text="显示多选对话框" /></RelativeLayout>

二、弹出框ListView是适配器，MutipleChoiceAdapter.java：

package com.example.mutichoicedialog;import android.content.Context;
import android.util.SparseBooleanArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.TextView;public class MutipleChoiceAdapter extends BaseAdapter {// 填充数据的list  private String[] list;  // 用来控制CheckBox的选中状况  private SparseBooleanArray isSelected;  // 用来导入布局  private LayoutInflater inflater;  public MutipleChoiceAdapter(String[] list, Context context) {this.list = list;  inflater = LayoutInflater.from(context);  isSelected = new SparseBooleanArray();  // 初始化数据  initData();  }// 初始化isSelected的数据  private void initData() {  for (int i = 0; i < list.length; i++) {  getIsSelected().put(i, false);  }  }  @Override  public int getCount() {  return list.length;  }  @Override  public Object getItem(int position) {  return list[position];  }  @Override  public long getItemId(int position) {  return position;  }  @Override  public View getView(int position, View convertView, ViewGroup parent) {  ViewHolder holder = null;  if (convertView == null) {  // 获得ViewHolder对象  holder = new ViewHolder();  // 导入布局并赋值给convertview  convertView = inflater.inflate(R.layout.custom_mutiplechoice_view_list_item, null);  holder.tv = (TextView) convertView.findViewById(R.id.item_tv);  holder.cb = (CheckBox) convertView.findViewById(R.id.item_cb);  // 为view设置标签  convertView.setTag(holder);  } else {  // 取出holder  holder = (ViewHolder) convertView.getTag();  }  // 设置list中TextView的显示  holder.tv.setText(list[position]);  // 根据isSelected来设置checkbox的选中状况  holder.cb.setChecked(getIsSelected().get(position));  return convertView;  }  public SparseBooleanArray getIsSelected() {  return isSelected;  }  public void setIsSelected(SparseBooleanArray isSelected) {  this.isSelected = isSelected;  }  public static class ViewHolder {  TextView tv;  public CheckBox cb;  }
}

多选对话框的自定义View，CustomMultipleChoiceView.java:

package com.example.mutichoicedialog;import com.example.mutichoicedialog.MutipleChoiceAdapter.ViewHolder;import android.content.Context;
import android.util.AttributeSet;
import android.util.SparseBooleanArray;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.TextView;
/*** 自定义的带 全选/反选 功能的多选对话框* @author king* @creation 2013-8-28*/
public class CustomMultipleChoiceView extends LinearLayout {private MutipleChoiceAdapter mAdapter;private String[] data;private TextView title;private ListView lv;private onSelectedListener onSelectedListener;//确定选择监听器private boolean curWillCheckAll = false;//当前点击按钮时是否将全选public CustomMultipleChoiceView(Context context, AttributeSet attrs) {super(context, attrs);initView();}public CustomMultipleChoiceView(Context context) {super(context);initView();}private void initView(){/* 实例化各个控件 */  LayoutInflater inflater = LayoutInflater.from(getContext());View view = inflater.inflate(R.layout.custom_mutiplechoice_view, null);lv = (ListView) view.findViewById(R.id.mutiplechoice_listview);  Button bt_selectall = (Button) view.findViewById(R.id.mutiplechoice_selectall_btn);  Button bt_ok = (Button) view.findViewById(R.id.mutiplechoice_ok_btn);title = (TextView) view.findViewById(R.id.mutiplechoice_title);if(curWillCheckAll){bt_selectall.setText("全选");}else{bt_selectall.setText("反选");}MyClickListener l = new MyClickListener();// 全选按钮的回调接口  bt_selectall.setOnClickListener(l);  bt_ok.setOnClickListener(l);// 绑定listView的监听器  lv.setOnItemClickListener(new OnItemClickListener() {  @Override  public void onItemClick(AdapterView<?> arg0, View arg1, int position,  long arg3) {  // 取得ViewHolder对象，这样就省去了通过层层的findViewById去实例化我们需要的cb实例的步骤  ViewHolder holder = (ViewHolder) arg1.getTag();  // 改变CheckBox的状态  holder.cb.toggle();  // 将CheckBox的选中状况记录下来  mAdapter.getIsSelected().put(position, holder.cb.isChecked());}  });
//        positiveBtn.setOnClickListener(l);addView(view);}public void setData(String[] data, boolean[] isSelected){if(data == null){throw new IllegalArgumentException("data is null");}this.data = data;mAdapter = new MutipleChoiceAdapter(data, getContext()); if(isSelected != null){if(isSelected.length != data.length){throw new IllegalArgumentException("data's length not equal the isSelected's length");}else{for(int i=0; i<isSelected.length; i++){mAdapter.getIsSelected().put(i, isSelected[i]);}}}// 绑定Adapter  lv.setAdapter(mAdapter);  }public void setTitle(String title){if(this.title != null){this.title.setText(title);}}public void setOnSelectedListener(onSelectedListener l){this.onSelectedListener = l;}public interface onSelectedListener{public void onSelected(SparseBooleanArray sparseBooleanArray);}/*** 全选*/public void selectAll(){if(data != null){for (int i = 0; i < data.length; i++) {  mAdapter.getIsSelected().put(i, true);  } // 刷新listview和TextView的显示  mAdapter.notifyDataSetChanged();}}/*** 全不选*/public void deselectAll(){if(data != null){for (int i = 0; i < data.length; i++) {  mAdapter.getIsSelected().put(i, false);  } // 刷新listview和TextView的显示  mAdapter.notifyDataSetChanged();}}/*** 反选*/public void reverseSelect(){if(data != null){for (int i = 0; i < data.length; i++) {  mAdapter.getIsSelected().put(i, !mAdapter.getIsSelected().get(i));  }  // 刷新listview和TextView的显示  mAdapter.notifyDataSetChanged();}}private class MyClickListener implements OnClickListener{@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.mutiplechoice_selectall_btn://全选/反选按钮if(data == null){return;}if(curWillCheckAll){selectAll();}else{deselectAll();}if(curWillCheckAll){((Button)v).setText("反选");}else{((Button)v).setText("全选");}curWillCheckAll = !curWillCheckAll;break;case R.id.mutiplechoice_ok_btn://确定选择的按钮if(onSelectedListener != null && mAdapter != null){onSelectedListener.onSelected(mAdapter.getIsSelected());}break;default:break;}}}
}

最后，是主界面Activity的代码，MainActivity.java:

package com.example.mutichoicedialog;import android.app.Activity;
import android.os.Bundle;
import android.util.SparseBooleanArray;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.LinearLayout.LayoutParams;
import android.widget.PopupWindow;
import android.widget.TextView;import com.example.mutichoicedialog.CustomMultipleChoiceView.onSelectedListener;public class MainActivity extends Activity {private PopupWindow stationSelectDialog;private EditText edtView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);edtView = (EditText) findViewById(R.id.text);}public void OnViewClick(View v){showMutiChoiceDialog(new String[]{"选项一","选项二","选项三","选项四","选项五","选项六","选项七","选项八","选项九","选项十",}, edtView);}private void showMutiChoiceDialog(final String[] stationsMean, final TextView textView){if(stationSelectDialog == null){LayoutInflater inflater = LayoutInflater.from(this);View view = inflater.inflate(R.layout.dialog_multiplechoice, null);CustomMultipleChoiceView mutipleChoiceView = (CustomMultipleChoiceView) view.findViewById(R.id.CustomMultipleChoiceView);mutipleChoiceView.setData(stationsMean, null);mutipleChoiceView.selectAll();mutipleChoiceView.setTitle("多选");stationSelectDialog = new PopupWindow(view, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, true);mutipleChoiceView.setOnSelectedListener(new onSelectedListener() {@Overridepublic void onSelected(SparseBooleanArray sparseBooleanArray) {stationSelectDialog.dismiss();StringBuilder sb = new StringBuilder();for(int i=0; i<sparseBooleanArray.size(); i++){if(sparseBooleanArray.get(i)){sb.append(stationsMean[i] + ",");}}if(sb.length() > 0)sb.deleteCharAt(sb.length()-1);textView.setText(sb.toString());}});}stationSelectDialog.showAtLocation(getCurrentFocus(), Gravity.CENTER, 0, 0);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.activity_main, menu);return true;}}

Ok,就是这么简单。

完整代码下载：例子

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