外部类实现发送短信的监听器

使用外部类定义事件监听器类的形式比较少见，主要因为如下两个原因：
1.事件监听器通常属于特定的 GUI 界面，定义成外部类不利于提高程序的内聚性。
2. 外部类形式的事件监听器不能自由访问创建 GUI 界面的类中的组件，编程不够简洁。
但如果某个事件监听器确实需要被多个 GUI 界面所共享，而且主要是完成某种业务逻辑的实现，则可以考虑使用外部类的形式来定义事件监听器类。

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="fill_horizontal"
    android:orientation="vertical" >

    <EditText
        android:id="@+id/address"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:hint="请填写收信号码" />

    <EditText
        android:id="@+id/content"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:hint="请填写短信内容"
        android:lines="3" />

    <Button
        android:id="@+id/send"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:hint="发送" />

</LinearLayout>

SendMsgListener.java

/**
 *
 */
package org.crazyit.event;

import android.app.Activity;
import android.app.PendingIntent;
import android.content.Intent;
import android.telephony.SmsManager;
import android.view.View;
import android.view.View.OnLongClickListener;
import android.widget.EditText;
import android.widget.Toast;

/**
 * Description: <br/>
 * 网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> <br/>
 * Copyright (C), 2001-2014, Yeeku.H.Lee <br/>
 * This program is protected by copyright laws. <br/>
 * Program Name: <br/>
 * Date:
 * 
 * @author Yeeku.H.Lee kongyeeku@163.com
 * @version 1.0
 */
public class SendSmsListener implements OnLongClickListener {
    private Activity act;
    private EditText address;
    private EditText content;

    public SendSmsListener(Activity act, EditText address, EditText content) {
        this.act = act;
        this.address = address;
        this.content = content;
    }

    @Override
    public boolean onLongClick(View source) {
        String addressStr = address.getText().toString();
        String contentStr = content.getText().toString();
        // 获取短信管理器
         SmsManager smsManager = SmsManager.getDefault();
        // 创建发送短信的PendingIntent
        PendingIntent sentIntent = PendingIntent.getBroadcast(act, 0,
                new Intent(), 0);
        // 发送文本短信
         smsManager.sendTextMessage(addressStr, null, contentStr, sentIntent,
                null);
        Toast.makeText(act, "短信发送完成", Toast.LENGTH_LONG).show();
        return false;
    }
}

SendMsg.java

package org.crazyit.event;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;

/**
 * Description: <br/>
 * site: <a href="http://www.crazyit.org">crazyit.org</a> <br/>
 * Copyright (C), 2001-2014, Yeeku.H.Lee <br/>
 * This program is protected by copyright laws. <br/>
 * Program Name: <br/>
 * Date:
 * 
 * @author Yeeku.H.Lee kongyeeku@163.com
 * @version 1.0
 */
public class SendSms extends Activity {
    EditText address;
    EditText content;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        // 获取页面中收件人地址、短信内容
         address = (EditText) findViewById(R.id.address);
        content = (EditText) findViewById(R.id.content);
        Button bn = (Button) findViewById(R.id.send);
        bn.setOnLongClickListener(new SendSmsListener(this, address, content));
    }
}

Manifest.xml

添加发送短信的权限。

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

    <uses-sdk
        android:minSdkVersion="10"
        android:targetSdkVersion="17" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".SendSms"
            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>

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

</manifest>

注意是长按动作。