AndroidManifest.xml

    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.SEND_SMS" />

list.xml

<?xml version="1.0" encoding="UTF-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   
    android:orientation="vertical"   
    android:layout_width="fill_parent"   
    android:layout_height="fill_parent"   
    >   
<ListView     
    android:id="@+id/list"   
    android:layout_width="fill_parent"    
    android:layout_height="wrap_content"    
    /> 
</LinearLayout>  

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="shortcut.song.com.myapplication.GroupSendSmsActivity">

    <EditText
        android:id="@+id/edit_number"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <EditText
        android:id="@+id/edit_mgs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:id="@+id/btn_select"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Select"/>
    <Button
        android:id="@+id/btn_send_gsms"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="GroupSms"/>
</LinearLayout>

package shortcut.song.com.myapplication;

import android.app.PendingIntent;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.provider.ContactsContract;
import android.provider.Telephony;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import java.lang.reflect.Array;
import java.util.ArrayList;

public class GroupSendSmsActivity extends AppCompatActivity {
    EditText numbers, sendmessage;
    Button btnSelect, btnSend;
    SmsManager smsManager;
    // 记录群发的号码列表
    ArrayList<String> sendList = new ArrayList<String>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_group_send_sms);

        smsManager = SmsManager.getDefault();

        numbers = (EditText)findViewById(R.id.edit_number);
        sendmessage = (EditText)findViewById(R.id.edit_mgs);
        btnSelect = (Button)findViewById(R.id.btn_select);
        btnSend = (Button)findViewById(R.id.btn_send_gsms);

        btnSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                for (String number : sendList) {
                    // 创建PendingIntent对象
                    PendingIntent pi = PendingIntent.getActivity(GroupSendSmsActivity.this, 0, new Intent(), 0);
                    // 发送短信
                    smsManager.sendTextMessage(number, null, sendmessage.getText().toString(), pi, null);
                }
                Toast.makeText(GroupSendSmsActivity.this, "发送完成", Toast.LENGTH_SHORT).show();
            }
        });

        btnSelect.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 查询联系人的电话号码
                final Cursor cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
                BaseAdapter adapter = new BaseAdapter() {
                    @Override
                    public int getCount() {
                        return cursor.getCount();
                    }

                    @Override
                    public Object getItem(int position) {
                        return position;
                    }

                    @Override
                    public long getItemId(int position) {
                        return position;
                    }

                    @Override
                    public View getView(int position, View convertView, ViewGroup parent) {
                        cursor.moveToPosition(position);
                        CheckBox rb = new CheckBox(GroupSendSmsActivity.this);
                        // 获取联系人的电话号码，并去掉中间的中刬线，空格
                        String number = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER))
                                .replace("-","")
                                .replace(" ","");

                            rb.setText(number);
                        // 如果该号码已经加入发送人名单，默认勾选该号码
                        if (isChecked(number)) {
                            rb.setChecked(true);
                        }
                        return rb;
                    }
                };
                // 加载list.xml布局文件对应的View
                View selectView = getLayoutInflater().inflate(R.layout.list,
                        null);
                // 获取selectView中的名为list的ListView组件
                final ListView listView = (ListView) selectView
                        .findViewById(R.id.list);
                listView.setAdapter(adapter);
                new AlertDialog.Builder(GroupSendSmsActivity.this)
                        .setView(selectView)
                        .setPositiveButton("确定",
                                new DialogInterface.OnClickListener()
                                {
                                    @Override
                                    public void onClick(DialogInterface dialog,
                                                        int which)
                                    {
                                        // 清空sendList集合
                                        sendList.clear();
                                        // 遍历listView组件的每个列表项
                                        for (int i = 0; i < listView.getCount(); i++)
                                        {
                                            CheckBox checkBox = (CheckBox) listView
                                                    .getChildAt(i);
                                            // 如果该列表项被勾选
                                            if (checkBox.isChecked())
                                            {
                                                // 添加该列表项的电话号码
                                                sendList.add(checkBox.getText()
                                                        .toString());
                                            }
                                        }
                                        numbers.setText(sendList.toString());
                                    }
                                }).show();
            }
        });

    }

    // 判断某个电话号码是否已在群发范围内
    public boolean isChecked(String phone) {
        for (String s: sendList) {
            if (s.equals(phone)) {
                return true;
            }
        }
        return false;
    }


}