<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/et_validateCode"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignParentTop="true"
 android:layout_centerHorizontal="true"
 android:ems="10" />
</RelativeLayout> 

package smsdemo.com.smsdemo;

import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.EditText;

/**
 * 短信驗證碼自動填寫功能的實現(xiàn)
 *
 * Created by huangminzheng on 16/3/15.
 */
public class MainActivity extends Activity {

 public static final int MSG_RECEIVED_CODE = 1;
 private EditText metValidateCode = null;
 private SmsObserver mObserver;

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

 metValidateCode = (EditText) findViewById(R.id.et_validateCode);

 mObserver = new SmsObserver(MainActivity.this, mHandler);
 Uri uri = Uri.parse("content://sms");
 //注冊短信的監(jiān)聽
 getContentResolver().registerContentObserver(uri, true, mObserver);
 }

 @Override
 protected void onPause() {
 super.onPause();
 //解除注冊短信的監(jiān)聽
 getContentResolver().unregisterContentObserver(mObserver);
 }

 private Handler mHandler = new Handler() {
 @Override
 public void handleMessage(Message msg) {
  if (msg.what == MSG_RECEIVED_CODE) {
  String code = (String) msg.obj;
  metValidateCode.setText(code);
  }
 }
 };

}

package smsdemo.com.smsdemo;

import android.content.Context;
import android.database.ContentObserver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Handler;
import android.util.Log;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Created by huangminzheng on 16/3/15.
 *
 * 觀察者對象
 */
public class SmsObserver extends ContentObserver{

 private Context mContext;
 private Handler mHandler;

 public SmsObserver(Context context, Handler handler) {
 super(handler);
 mContext = context;
 mHandler = handler;
 }

 @Override
 public void onChange(boolean selfChange, Uri uri) {
 super.onChange(selfChange, uri);

 Log.d("main", "SMS has changed!");
 Log.d("main", uri.toString());
 // 短信內(nèi)容變化時，第一次調(diào)用該方法時短信內(nèi)容并沒有寫入到數(shù)據(jù)庫中,return
 if (uri.toString().equals("content://sms/raw")) {
  return;
 }
 getValidateCode();//獲取短信驗證碼

 }

 /**
 * 獲取短信驗證碼
 */
 private void getValidateCode() {
 String code = "";
 Uri inboxUri = Uri.parse("content://sms/inbox");
 Cursor c = mContext.getContentResolver().query(inboxUri, null, null, null, "date desc");//
 if (c != null) {
  if (c.moveToFirst()) {
  String address = c.getString(c.getColumnIndex("address"));
  String body = c.getString(c.getColumnIndex("body"));

  //13162364720為發(fā)件人的手機號碼
  if (!address.equals("13162364720")) {
   return;
  }
  Log.d("main", "發(fā)件人為:" + address + " ," + "短信內(nèi)容為:" + body);

  Pattern pattern = Pattern.compile("(\\d{6})");
  Matcher matcher = pattern.matcher(body);

  if (matcher.find()) {
   code = matcher.group(0);
   Log.d("main", "驗證碼為: " + code);
   mHandler.obtainMessage(MainActivity.MSG_RECEIVED_CODE, code).sendToTarget();
  }

  }
  c.close();
 }
 }
}