安卓使用SmsManager实现短信发送

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>