Android使用ContentObserver进行实时短信填写

public class SmsObservable extends ContentObserver {
    private static final String TAG = "SmsObservable";
    private Context mContext;
    private Handler handler;

    /**
     * Creates a content observer.
     *
     * @param handler The handler to run {@link #onChange} on, or null if none.
     */
    public SmsObservable(Context mContext, Handler handler) {
        super(handler);
        this.mContext = mContext;
        this.handler = handler;
    }

    @Override
    public void onChange(boolean selfChange, Uri uri) {
        super.onChange(selfChange, uri);
        Log.e(TAG, "uri :" + uri.toString());

        //会触发两次，只有第二次有用
        if ("content://sms/raw".equals(uri.toString())) {
            return;
        }

        Uri inboxUri = Uri.parse("content://sms/inbox");
        Cursor cursor = mContext.getContentResolver().query(inboxUri, null, null, null, "date desc");
        if (cursor != null) {
            if (cursor.moveToFirst()) {
                String address = cursor.getString(cursor.getColumnIndex("address"));
                String body = cursor.getString(cursor.getColumnIndex("body"));
                Log.e(TAG, "address :" + address + "    body : " + body);

                // TODO: 2016/7/3  此处还可以拿手机号判断是不是本公司该服务器发出的消息
                //进行正则表达式验证
                Pattern pattern = Pattern.compile("(\\d{6})");//6个数字连在一起的
                Matcher matcher = pattern.matcher(body);
                if (matcher.find()) {
                    String code = matcher.group(0);//获取当前组里面的第一个
                    Log.e(TAG, "匹配出来的code ：" + code);
                    handler.obtainMessage(MainActivity.SEND_SMS,code).sendToTarget();

                }
            }
        }
    }
}

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";
    private SmsObservable smsObservable;
    public static final int SEND_SMS  = 1;

    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            Log.e(TAG,"....  msg :"+msg.obj);

        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        smsObservable = new SmsObservable(this,handler);
        //@NonNull Uri uri, boolean notifyForDescendents,@NonNull ContentObserver observ
        Uri uri = Uri.parse("content://sms");
        /**
         * 是否监听sms uri中的所有变化
         */
        getContentResolver().registerContentObserver(uri,true,smsObservable);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        getContentResolver().unregisterContentObserver(smsObservable);
    }
}