Android简易实战教程--第四话《最简单的短信发送器》

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:orientation="vertical"
>

<EditText
android:id="@+id/et_phone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="phone"
android:hint="请输入对方号码"
/>
<EditText
android:id="@+id/et_content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:lines="5"
android:hint="请输入短信内容"
android:gravity="top"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="发送"
android:onClick="send"
/>

</LinearLayout>

package com.ydl.smssender;

import java.util.ArrayList;

//省略导包

public class MainActivity extends Activity {

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

public void send(View v){
//拿到用户输入的号码和内容
EditText et_phone = (EditText) findViewById(R.id.et_phone);
EditText et_content = (EditText) findViewById(R.id.et_content);

String phone = et_phone.getText().toString();
String content = et_content.getText().toString();

//1.获取短信管理器
SmsManager sm = SmsManager.getDefault();

//2.切割短信，把长短信分成若干个小短信
ArrayList<String> smss = sm.divideMessage(content);//an ArrayList of strings that, in order, comprise the original message

//3.for循环把集合中所有短信全部发出去
for (String string : smss) {

sm.sendTextMessage(phone, null, string, null, null);//Send a text based SMS.
}
}

}

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