mail.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:orientation="vertical" >

    <Button
        android:id="@+id/save"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="保存" />
     <Button
        android:id="@+id/submit"
        android:layout_width="wrap_content"
package com.mhm.button.activity;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class ButtonDemoActivity extends Activity {
    /** Called when the activity is first created. */
    
    private Button btn_save;
    
    private Button btn_submit;
    
    private Button btn_call;
    
    private Button btn_sms;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btn_save = (Button)findViewById(R.id.save);
        btn_submit = (Button)findViewById(R.id.submit);
        btn_call = (Button)findViewById(R.id.btn_call);
        btn_sms = (Button)findViewById(R.id.btn_sms);
        
        btn_save.setOnClickListener(listener);
        btn_submit.setOnClickListener(listener);
        btn_call.setOnClickListener(listener);
        btn_sms.setOnClickListener(listener);
    }
    
    private OnClickListener listener = new OnClickListener() {
        public void onClick(View v) {
            Button b = (Button)v;
            switch (b.getId()) {
            case R.id.save:
                Toast t = Toast.makeText(getApplicationContext(), "保存成功~", Toast.LENGTH_SHORT);
                t.setGravity(Gravity.CENTER_VERTICAL, 0, -100);
                t.show();
                break;
                
            case R.id.submit:
                t = Toast.makeText(getApplicationContext(), "提交成功~", Toast.LENGTH_SHORT);
                t.setGravity(Gravity.CENTER_VERTICAL, 0, 100);
                t.show();
                break;
                
            case R.id.btn_call:
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_CALL);
                intent.setData(Uri.parse("tel:187********"));
                startActivity(intent);
                break;
                
            case R.id.btn_sms:
                intent = new Intent();
                intent.setAction(Intent.ACTION_SENDTO);
                intent.setData(Uri.parse("smsto:5554"));
                intent.putExtra("sms_body", "Hello world");
                startActivity(intent);
                break;
                
            default:
                t = Toast.makeText(getApplicationContext(), "按钮成功~", Toast.LENGTH_SHORT);
                t.setGravity(Gravity.CENTER_VERTICAL, 0, 200);
                t.show();
                break;
            }
        }
    };
}
         android:layout_height="wrap_content"
        android:text="提交" />
     <Button
        android:id="@+id/btn_call"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="CALL" />
     <Button
        android:id="@+id/btn_sms"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="MESSAGE" />

</LinearLayout>
 
 
拨电话
 
intent.setData(Uri.parse("tel:187********"));
 
发消息
 
intent.putExtra("sms_body", "Hello world");
 
 
 
使拨号和发短信能通过android的允许
在AndroidManifest.xml中添加，是application的节点下面添加。
 
<uses-permission android:name="android.permission.CALL_PHONE"/>
<uses-permission android:name="android.permission.SEND_SMS"/>