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("請輸入手機號");       return;     }     if(TextUtils.isEmpty(content)){       showToast("請輸入內容");       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="請輸入手機號"     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="請輸入短信內容" />      <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"/>