今天来记录一下一个短信发送器，并且能监控短信是否发送成功

首先如果在我们程序中要发送短信必须先声明android.permission.SEND_SMS的权限

第二发送短信，我们需要一个SmsManager的类帮助我们发送短信,注意：这个类是在android.telephony.SmsManager包下的

SmsManager smsManager=SmsManager.getDefault();

创建实例，调用

smsManager.sendTextMessage(String destinationAddress, String scAddress, 

String text, PendingIntent sentIntent, 

PendingIntent deliveryIntent);

来发送短信，值得注意的是第一个参数是短信接收者的手机号码，第二个参数是不常用不用管，第三个参数是短信的内容，

第四个参数是一个PendingIntent，短信发送成功，SmsManager会利用这个PendingIntent来发送一个广播（此广播中的

ResultCode会告诉广播接受者，此条短信是否发送成功），官方的解释如下： if not NULL this PendingIntent is broadcast when the

message is successfully sent, or failed. The result code will be Activity.RESULT_OK for success, or one of these errors:RESULT_ERROR_GENERIC_FAILURE、

RESULT_ERROR_RADIO_OFF、RESULT_ERROR_NULL_PDU。

代码如下：

package com.jsako.sendsms;

import android.app.Activity;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.text.TextUtils;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {

    private EditText et_phone;
    private EditText et_msg;

    private IntentFilter sendFilter;
    private SendStatusReceiver sendStatusReceiver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        et_phone = (EditText) findViewById(R.id.et_phone);
        et_msg = (EditText) findViewById(R.id.et_msg);
        sendFilter =new IntentFilter("SEND_SMS");
        sendStatusReceiver=new SendStatusReceiver();　　　　　//动态注册广播接收者
        registerReceiver(sendStatusReceiver, sendFilter);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();　　　　//取消注册广播接收者
        unregisterReceiver(sendStatusReceiver);
        sendStatusReceiver=null;
    }

    public void send(View view){
        String phone=et_phone.getText().toString().trim();
        String msg=et_msg.getText().toString().trim();
        if(TextUtils.isEmpty(phone)||TextUtils.isEmpty(msg)){
            Toast.makeText(this,"手机号码或短信内容不能为空", 0).show();
        }
        SmsManager smsManager=SmsManager.getDefault();
        Intent intent=new Intent("SEND_SMS");　　　　　//获得一个能发出广播的意图
        PendingIntent pi=PendingIntent.getBroadcast(this, 0, intent, 0);
        smsManager.sendTextMessage(phone, null, msg, pi,null );
    }

    private class SendStatusReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            if(this.getResultCode()==RESULT_OK){　　　　　　　　　　//如果结果集为RESULT_OK说明消息发送成功
                Toast.makeText(getApplicationContext(), "发送成功", 0).show();
            }else{
                Toast.makeText(getApplicationContext(), "发送失败", 0).show();
            }
        }

    }
}