1.电话拨号器：

activity_main.xml

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

   <EditText
        android:id="@+id/editText1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="phone" >

    </EditText>

   <Button
       android:id="@+id/button1"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:layout_alignParentRight="true"
       android:layout_below="@+id/editText1"
       android:text="拨打电话" />//注意：如果想让这个XML文件没有感叹号，则需要在strings.xml配置

</RelativeLayout>

package com.csdn.duil;

import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.text.InputFilter.LengthFilter;
import android.text.TextUtils;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
/**
 * 点击事件方法
 * 1.创建一个内部类定义点击事件
 * 2.采用匿名内部类创建点击事件
 * 3.接口里面未实现的方法（this）常见
 * 4.在布局文件里面绑定一个点击的方法
 */
	private Button btn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //加载布局文件
        setContentView(R.layout.activity_main);
        //查找到按钮
        btn=(Button)this.findViewById(R.id.button1);
        btn.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				EditText text=(EditText) MainActivity.this.findViewById(R.id.editText1);
				//获取文本去空格
			    String number=text.getText().toString().trim();
			    
			    //判断number是否是空
			    if(TextUtils.isEmpty(number)){
			    	Toast.makeText(MainActivity.this,"号码不能为空",Toast.LENGTH_SHORT).show();
			    	return;
			    }
			    
			    
			    //意图  想干一件什么事情
			    Intent intent=new Intent();
			    //打人
			    intent.setAction(Intent.ACTION_CALL);
			    //url统一资源定位符    uri更厉害，统一资源标识符
			    intent.setData(Uri.parse("tel:"+number));
			    
			    startActivity(intent);
			}
		});
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    
}

2.短些发送器：

activity_main.xml

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

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText2"
        android:layout_below="@+id/editText2"
        android:layout_marginTop="21dp"
        android:text="发送" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText1"
        android:layout_alignParentTop="true"
        android:text="@string/please_input_number"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="23dp"
        android:ems="10"
      />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText1"
        android:layout_alignRight="@+id/editText1"
        android:layout_below="@+id/editText1"
        android:layout_marginTop="25dp"
        android:text="请输入内容"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textColor="#ff0000" />

    <EditText
        android:lines="5"
        android:id="@+id/editText2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView2"
        android:layout_marginTop="25dp"
        android:ems="10"
        android:inputType="textMultiLine" >

        <requestFocus />
    </EditText>

</RelativeLayout>

MainActivity.java

package com.csdn.sms;

import java.util.ArrayList;

import android.os.Bundle;
import android.app.Activity;

import android.telephony.SmsManager;
import android.text.TextUtils;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {
    private Button btn_send;
    private EditText text1;
    private EditText text2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        text1=(EditText) this.findViewById(R.id.editText1);
        text2=(EditText) this.findViewById(R.id.editText2);
        
        btn_send=(Button) this.findViewById(R.id.button1);
        btn_send.setOnClickListener(this);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }


	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.button1:
			String number=text1.getText().toString().trim();
			String context=text2.getText().toString().trim();
			
			if(TextUtils.isEmpty(context)||TextUtils.isEmpty(number)){
				Toast.makeText(this, "电话号码或者内容不能为空",Toast.LENGTH_SHORT).show();
				return;
				
			}else{
				
				SmsManager smsManager=SmsManager.getDefault();
				//彩信
				//smsManager.sendTextMessage(number,null, context, null, null);
				//发送多条短信
				ArrayList<String> contents=smsManager.divideMessage(context);
				for(String str:contents){
					smsManager.sendTextMessage(number,null, str, null, null);
				}
				
				
			}
			
			
			break;

		default:
			break;
		}
	}
    
}