定义了两个Java。一个作为事件监听器发送短信。MainActivity调用它。

---------------------------外部类监听器-------------------

SendSMsListener.java

package com.example.admin.webchanjian;

import android.app.Activity;
import android.app.PendingIntent;
import android.content.Intent;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

/**
 * Created by admin on 2016/10/6.
 */
public class SendSMsListener implements View.OnLongClickListener {
    private Activity activity;
    private EditText address;
    private EditText content;
    public SendSMsListener(Activity activity,EditText address,EditText content){
        this.activity=activity;
        this.address=address;
        this.content=content;
    }

    @Override
    public boolean onLongClick(View v) {
        String addressStr=address.getText().toString();
        String contentStr=content.getText().toString();
        //获取信息管理器
        SmsManager smsManager=SmsManager.getDefault();
        //创建发送信息的PendingIntent
        PendingIntent pendingIntent=PendingIntent.getBroadcast(activity,0,new Intent(),0);
        smsManager.sendTextMessage(addressStr,null,contentStr,pendingIntent,null);
        Toast.makeText(activity,"短信发送完成",Toast.LENGTH_LONG).show();
        return false;
    }
}


-------------------------MainActivity-------------------------

    //------------------------sent messages---------------------
    EditText address;
    EditText content;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.sentsmslistener);
        address=(EditText) findViewById(R.id.address);
        content=(EditText) findViewById(R.id.content);
        Button btn=(Button) findViewById(R.id.sent);
        btn.setOnLongClickListener(new SendSMsListener(this,address,content));
    }
}


--------------------------------布局-------------------------------------------

sentsmslistener.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">

<EditText
    android:id="@+id/address"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="35dp"
    />
    <EditText
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="35dp"
        />
    <Button
        android:id="@+id/sent"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="发送"
        android:textSize="35dp"
        />
</LinearLayout>

外部类监听发送短信--------------------------setOnLongClickListener------------------------