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>