Android使用SmsManager实现短信发送功能

package com.example.sms; 
 
import java.util.ArrayList; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.telephony.SmsManager; 
import android.text.TextUtils; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.EditText; 
import android.widget.Toast; 
 
public class MainActivity extends Activity implements OnClickListener { 
   
  private EditText mNumberText; 
  private EditText mContentText; 
   
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setTitle(getString(R.string.app_name)); 
    setContentView(R.layout.activity_main); 
     
    mNumberText = (EditText)this.findViewById(R.id.number);//找到number 
    mContentText = (EditText)this.findViewById(R.id.msg_content);  
    findViewById(R.id.send).setOnClickListener(this); 
  } 
   
  @Override 
  public void onClick(View arg0) { 
    String content = mContentText.getText().toString(); 
    String number = mNumberText.getText().toString(); 
     
    if(TextUtils.isEmpty(number)){ 
      showToast("请输入手机号"); 
      return; 
    } 
    if(TextUtils.isEmpty(content)){ 
      showToast("请输入内容"); 
      return; 
    } 
     
    ArrayList<String  messages = SmsManager.getDefault().divideMessage(content); 
    for(String text : messages){ 
      SmsManager.getDefault().sendTextMessage(number, null, text, null, null); 
    } 
    showToast(getString(R.string.success)); 
  } 
   
  private void showToast(String msg) { 
    Toast.makeText(MainActivity.this, msg, Toast.LENGTH_LONG).show(); 
  } 
   
} 

<?xml version="1.0" encoding="utf-8"?  
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" 
  android:background="#87CEEB" 
  android:paddingTop="5dp"   
 
  <EditText 
    android:id="@+id/number" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:hint="请输入手机号" 
    android:inputType="number" /  
 
  <LinearLayout 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_alignParentBottom="true" 
    android:gravity="center_vertical" 
    android:orientation="horizontal"   
 
    <EditText 
      android:id="@+id/msg_content" 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_gravity="center_vertical" 
      android:layout_weight="1" 
      android:hint="请输入短信内容" /  
 
    <Button 
      android:id="@+id/send" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_gravity="center_vertical" 
      android:gravity="center_vertical" 
      android:text="@string/button" 
      android:textColor="#FF1493" /  
  </LinearLayout  
 
</RelativeLayout  

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