基于RxJava框架实现获取验证码的辅助类

package txcap.com.bigtime.utils;

import android.widget.Button;
import android.widget.EditText;

import com.jakewharton.rxbinding.view.RxView;
import com.jakewharton.rxbinding.widget.RxTextView;

import java.util.concurrent.TimeUnit;

import rx.Observable;
import rx.Subscriber;
import rx.Subscription;
import rx.android.schedulers.AndroidSchedulers;
import rx.functions.Action0;
import rx.functions.Action1;
import txcap.com.bigtime.Constant;
import txcap.com.bigtime.R;
import txcap.com.library.core.app.BaseApplication;
import txcap.com.library.core.rx.RxManager;
import txcap.com.library.utils.file.ResUtil;

/**
 * @author gaojigong
 * @version V1.0
 * @Description: 处理验证码的工具
 * @date 17/3/22
 */
public abstract class CheckCodeUtil {
  private RxManager mRxManager;
  private Button btnGetCheckCode;
  private EditText edtAccount;
  //验证码获取中，按钮始终是倒计时状态，不受输入框事件的影响
  protected boolean countDowning = false;
  //用于取消倒计时

  private Subscription intervalSub;
  public CheckCodeUtil(RxManager mRxManager, Button btnGetCheckCode, EditText edtAccount) {
    this.mRxManager = mRxManager;
    this.btnGetCheckCode = btnGetCheckCode;
    this.edtAccount = edtAccount;
    init();
  }

  private void init() {
    RxView.enabled(btnGetCheckCode).call(false);
    Observable<CharSequence> observableAccount = RxTextView.textChanges(edtAccount);
    //账号输入不合理不能点击获取验证码
    mRxManager.add(observableAccount
        .subscribeOn(AndroidSchedulers.mainThread())
        .subscribe(new Action1<CharSequence>() {
          @Override
          public void call(CharSequence charSequence) {
            if(!countDowning){//这样能减少重复执行
              if (etCheck(charSequence.toString())) {
                RxView.enabled(btnGetCheckCode).call(true);
              } else {
                RxView.enabled(btnGetCheckCode).call(false);
              }
            }
          }
        }));
    //点击获取验证码
    mRxManager.add(
        RxView.clicks(btnGetCheckCode)
            .throttleFirst(Constant.CLICK_THROTTLE, TimeUnit.SECONDS)
            .subscribe(new Action1<Void>() {
              @Override
              public void call(Void aVoid) {
                getCheckCode();
              }
            })
    );
  }
  /**
   * 获取验证码
   */
  private void getCheckCode() {
    intervalSub = Observable.interval(0,1,TimeUnit.SECONDS, AndroidSchedulers.mainThread())
        .take(Constant.CHECK_CODE_SECOND)
        .doOnSubscribe(new Action0() {
          @Override
          public void call() {
            getCodeNumber();
            //按钮变为不可点击
            RxView.enabled(btnGetCheckCode).call(false);
            countDowning = true;
          }
        })
        .subscribe(new Subscriber<Long>() {
          @Override
          public void onCompleted() {
            countDowning = false;
            RxTextView.text(btnGetCheckCode).call(ResUtil.getResString(BaseApplication.getAppContext(),R.string.get_check_code));
            if(etCheck(edtAccount.getText().toString())){
              RxView.enabled(btnGetCheckCode).call(true);
            }
          }

          @Override
          public void onError(Throwable e) {
            countDowning = false;
            RxTextView.text(btnGetCheckCode).call(ResUtil.getResString(BaseApplication.getAppContext(),R.string.get_check_code));
            if(etCheck(edtAccount.getText().toString())){
              RxView.enabled(btnGetCheckCode).call(true);
            }
          }

          @Override
          public void onNext(Long aLong) {
            RxTextView.text(btnGetCheckCode).call((Constant.CHECK_CODE_SECOND - aLong)+"s");
          }
        });

    mRxManager.add(intervalSub);
  }

  /**
   * 获取验证码
   */
  public abstract void getCodeNumber();

  /**
   * 验证规则
   * @param str
   * @return
   */
  public abstract boolean etCheck(String str);

  public void getCodeError(){
    if(null != intervalSub){
      if(!intervalSub.isUnsubscribed()){
        intervalSub.unsubscribe();
        RxTextView.text(btnGetCheckCode).call(ResUtil.getResString(BaseApplication.getAppContext(),R.string.get_check_code));
        RxView.enabled(btnGetCheckCode).call(true);
        countDowning = false;
      }
    }
  }
}

@BindView(R.id.edt_account)
EditText edtAccount;
@BindView(R.id.btn_get_check_code)
Button btnGetCheckCode;
private CheckCodeUtil checkCodeUtil;
checkCodeUtil = new CheckCodeUtil(mRxManager,btnGetCheckCode,edtAccount) {
  @Override
  public void getCodeNumber() {
    mPresenter.getCode(edtAccount.getText().toString());
  }

  @Override
  public boolean etCheck(String str) {
    return StrCheckUtil.checkedAccount(str);
  }
};
@Override
public void getCodeFailed(String message) {
  showToastLong("获取验证码失败:" + message);
  checkCodeUtil.getCodeError();
}