Android：发短信Demo

package com.example.administrator.mysend;


import android.app.Activity;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import java.util.ArrayList;

public class MainActivity extends Activity
    private EditText et_num;
    private EditText et_content;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.mysend_layout);
    }
   public void send(){
       et_num= (EditText) findViewById(R.id.et_num);
       et_content= (EditText) findViewById(R.id.et_msg);
       String num=et_num.getText().toString();
       String content=et_content.getText().toString();

       //1、获得短信管理器
       SmsManager sm=SmsManager.getDefault();
       //2、切割短信,把长短信切割成多条小短信
       ArrayList<String> smss=sm.divideMessage(content);
       //3、把多条短信发送出去
       for (String smss_divide:smss) {
           sm.sendTextMessage(num,null,smss_divide,null,null);

       }

   }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:theme="@android:style/Theme.Light">
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/et_num"
        android:hint="请输入手机号码"
        android:textSize="30dp"
        android:inputType="number"/>
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/et_msg"
        android:textSize="30dp"
        android:hint="请输入短信内容"
        android:lines="3"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/bt_send"
        android:onClick="send"
        android:textSize="30dp"
        android:text="发送"/>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.administrator.mysend"
<uses-permission android:name="android.permission.SEND_SMS"></uses-permission>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme"
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            <intent-filter>
                <action android:name="android.intent.action.MAIN"

                <category android:name="android.intent.category.LAUNCHER"
            </intent-filter>
        </activity>
    </application>

</manifest>