做了很多實驗，看了很多demo，網上幾乎都是傳送訊息然後自定義獲取驗證碼，可是實際開發中，我們最常見的還是通過傳送請求而獲得的驗證碼：

下面貼出例子，我這裡用的請求框架是AsyncHttp，各位可以隨便，這裡的介面暫時還能用，各位可以參考；

注意：我這裡後臺拿的code欄位是我自己伺服器返回的，你要根據實際情況你後臺給你返回的欄位要匹配

activity_main:

<LinearLayout 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:orientation="vertical" >

        <EditText
            android:layout_gravity="center_vertical"
            android:id="@+id/phone"
            style="?android:attr/textViewStyle"
            android:layout_width="200dp"
            android:layout_height="50dp"
        
            android:background="@drawable/bg_edittext"
            android:hint="手機號"
            android:inputType="number"
            android:singleLine="true"
            android:textSize="20sp" />
    <LinearLayout
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <EditText
            android:layout_gravity="center_vertical"
            android:id="@+id/id_verify_number_editview"
            style="?android:attr/textViewStyle"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:background="@drawable/bg_edittext"
            android:hint="@string/wait_write_sms"
            android:inputType="number"
            android:singleLine="true"
            android:textSize="20sp" />

        <Button
    
            android:layout_gravity="center_vertical"
            android:id="@+id/id_verify_number_sendbutton"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/receive_sms" />
    </LinearLayout>



</LinearLayout>
 

package com.example.verifysms;

import java.util.HashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.http.Header;
import org.json.JSONException;
import org.json.JSONObject;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.JsonHttpResponseHandler;
import com.loopj.android.http.RequestParams;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.telephony.SmsMessage;
import android.text.TextUtils;
import android.text.format.Time;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {

	private EditText mEditText,phone;
	private Button mSendButton;

	private String getcodeURL = "http://12********************/sms";
	private AsyncHttpClient client = new AsyncHttpClient();
	//簡訊驗證碼內容 驗證碼是6位數字的格式
	private String strContent;
	private String patternCoder = "(?<!\\d)\\d{6}(?!\\d)";
	
	//更新介面
	private Handler mHandler = new Handler() {

		@Override
		public void handleMessage(Message msg) {
			if (mEditText != null) {
				mEditText.setText(strContent);
			}
		}

	};
	public void getCode() {
		HashMap<String, String> map = new HashMap<String, String>();

		map.put("phone",  phone.getText().toString().trim());
		RequestParams params = new RequestParams(map);
		client.post(getcodeURL, params,
				new JsonHttpResponseHandler() {
					@Override
					public void onSuccess(int statusCode, Header[] headers,
							JSONObject response) {
						Log.e("", response.toString());
						super.onSuccess(statusCode, headers, response);
						Toast.makeText(MainActivity.this, "簡訊已成功傳送，請注意查收", 1).show();
						
							try {
								String message=response.getString("code");
						//這個方法是正則表示式，但是因為我後臺返回的是空，所以我這裡正則表示式就暫時註釋掉了，如果你後臺是可以打印出驗證碼的這裡你可以開啟
//										String code = patternCode(message);
										if (!TextUtils.isEmpty(message)) {
											strContent = message;
											mHandler.sendEmptyMessage(1);
										
									
								}
							} catch (JSONException e) {
								// TODO Auto-generated catch block
								e.printStackTrace();
							}
					
		
					}

					@Override
					public void onFailure(int statusCode, Header[] headers,
							String responseString, Throwable throwable) {
						super.onFailure(statusCode, headers, responseString, throwable);
					}
					
					@Override
					public void onFailure(int statusCode, Header[] headers,
							Throwable throwable, JSONObject errorResponse) {
						super.onFailure(statusCode, headers, throwable,
								errorResponse);
					}
				});
	}


	//監聽簡訊廣播

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);	
		initView();
	}



	private void initView() {
		mEditText = (EditText) findViewById(R.id.id_verify_number_editview);
		phone=(EditText) findViewById(R.id.phone);
		mSendButton = (Button) findViewById(R.id.id_verify_number_sendbutton);
		mSendButton.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View arg0) {

		getCode();
			}
		});
		
	}

	

	/**
	 * 匹配簡訊中間的6個數字（驗證碼等）
	 * 
	 * @param patternContent
	 * @return
	 */
	private String patternCode(String patternContent) {
		if (TextUtils.isEmpty(patternContent)) {
			return null;
		}
		Pattern p = Pattern.compile(patternCoder);
		Matcher matcher = p.matcher(patternContent);
		if (matcher.find()) {
			return matcher.group();
		}
		return null;
	}


}