android开发学习---开发一个简易的短信发送器

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    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" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/input_phone" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/et_phone"
        android:layout_below="@+id/et_phone"
        android:text="@string/input_sms" />

    <EditText
        android:id="@+id/et_content"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView2"
        android:layout_alignRight="@+id/et_phone"
        android:layout_below="@+id/textView2"
        android:lines="4"
        android:ems="10" />

    <Button
        android:id="@+id/bt_send"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/et_content"
        android:layout_below="@+id/et_content"
        android:text="@string/send" 
        android:onClick="send_sms"/>

    <EditText
        android:id="@+id/et_phone"
        android:layout_width="wrap_content"
        android:inputType="phone"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView1"
        android:ems="10" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">短信发送器</string>
    <string name="action_settings">Settings</string>
    <string name="input_phone">请输入手机号</string>
    <string name="input_sms">请输入短信内容</string>
    <string name="send">发送</string>
    <string name="error_message">对方手机号码和短信内容都是必填的!</string>
</resources>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.amos.sms"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="4"
        android:targetSdkVersion="4" />
    <uses-permission android:name="android.permission.SEND_SMS"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.amos.sms.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>

package com.amos.sms;

import android.app.Activity;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
    private EditText et_phone;// 文本输入框中的手机号码
    private EditText et_content;// 文本输入框中的短信内容
    private String tag = "MainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        et_phone = (EditText) this.findViewById(R.id.et_phone);
        et_content = (EditText) this.findViewById(R.id.et_content);

    }

    public void send_sms(View v) {
        String phone = et_phone.getText().toString();
        String content = et_content.getText().toString();
        if ("".equals(phone) || "".equals(content)) {
            Log.e(tag, "手机号或者短信内容为空!" + " phone:" + phone + "  content:" + content);
            // 提示用户输入手机号码和短信内容
            Toast.makeText(this, R.string.error_message, Toast.LENGTH_LONG).show();
            return;
        } else {
            System.out.println("phone:" + phone + "  content:" + content);
            SmsManager smsManger = SmsManager.getDefault();
            // sentIntent, deliveryIntent
            // 延期的意图,这里sentIntent是发送报告,运营商返回的信息短信的发送报告等;deliveryIntent表示短信的返回报告
            Log.w(tag, "点击发送按钮了");
            // smsManger.sendTextMessage(phone, null, content, null, null);
            for (String message : smsManger.divideMessage(content)) {
                smsManger.sendTextMessage(phone, null, message, null, null);
            }
        }
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

[2014-02-26 22:33:14 - Dex Loader] Unable to execute dex: java.nio.BufferOverflowException. Check the Eclipse log for stack trace.
[2014-02-26 22:33:14 - sms] Conversion to Dalvik format failed: Unable to execute dex: java.nio.BufferOverflowException. Check the Eclipse log for stack trace.