MVP框架+OKhttp+登录与注册：

BaseActivity：

 

public abstract class BaseActitivty<P extends BasePresenter> extends AppCompatActivity implements IBaseView{

    public P presenter;
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(setChildContentView());
        initView();
        initBaseData();
        initData();
    }



    private  void initBaseData(){
       presenter = setPresenter();
        if (presenter != null) {
            presenter.attachView(this);
        }else {
            try {
                throw new Exception("您在Activity中没有设置Presenter，请重新创建");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    abstract P setPresenter();
    abstract void initView();
    abstract void initData();
    abstract int setChildContentView();
}

----------------------------------------------------------------------------------
 BasePresenter：

public class BasePresenter<V extends IBaseView>{
    private V miBaseView;
    public void attachView(V iBaseView){
        this.miBaseView = iBaseView;
    }
    public V getView(){
        return miBaseView;
    }
    public void detach(){
        miBaseView = null;
    }


}

-------------------------------------------------------------------------------------
Mactivity：
 

public class MainActivity extends BaseActitivty<MainPresenter> implements IMainView, View.OnClickListener {

    private EditText mobile;
    private EditText password;
    private EditText password_sure;
    private Button register;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.activity_main);
       /* presenter = new MainPresenter();
        presenter.attachView(this);
        presenter.getDataFromServer();*/
    }

    @Override
    protected MainPresenter setPresenter() {
        return new MainPresenter();
    }

    @Override
    void initView() {
        mobile = findViewById(R.id.mobile);
        password = findViewById(R.id.password);
        password_sure = findViewById(R.id.password_sure);
        register = findViewById(R.id.register);
        register.setOnClickListener(this);
        findViewById(R.id.login_in).setOnClickListener(this);
    }

    @Override
    void initData() {
        //presenter.getDataFromServer();
    }
    @Override
    public int setChildContentView(){
        return R.layout.activity_main;
    }
    @Override
    public void onSuccess(String str) {

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        presenter.detach();
    }

    @Override
    public void onClick(View view) {
           switch(view.getId()){
                   case R.id.register:
                       String phoneNum = mobile.getText().toString();
                       String passwor = password.getText().toString();
                       String passwor_sure = password_sure.getText().toString();
                       if (!CommonUtil.isMobileNO(phoneNum)){
                           Toast.makeText(MainActivity.this,"手机号格式不正确",Toast.LENGTH_SHORT).show();
                           return;
                       }
                       if (passwor == null ||"".equals(passwor)){
                           Toast.makeText(MainActivity.this,"密码格式不对",Toast.LENGTH_SHORT).show();
                           return;
                       }
                       if (!passwor.equals(passwor_sure)){
                           Toast.makeText(MainActivity.this,"两次密码不一致",Toast.LENGTH_SHORT).show();
                           return;
                       }
                       if (presenter != null){
                           String path = "user/reg";
                           HashMap<String,String> hashMap = new HashMap<>();
                           hashMap.put("mobile",phoneNum);
                           hashMap.put("password",passwor_sure);
                           presenter.getDataFromServer(path,hashMap);
                       }
                       break;
                   case R.id.login_in:
                       Intent intent = new Intent(MainActivity.this, LoginActivity.class);
                       startActivity(intent);
                       break;

               }
    }
} 

MainPresenter：

public class MainPresenter extends BasePresenter<IMainView>{

    private final HttpUtils httpUtils;
    private IMainView view;

    public MainPresenter(){
        httpUtils = HttpUtils.getInstance();
    }
    //注册进行跳转
  public void getDataFromServer(String path, HashMap<String,String> hashMap){
      httpUtils.doPost(path, hashMap, new HttpUtilsCallback() {
          @Override
          public void onSuccess(String str) {
              Log.e("zer","str="+str);
              Looper.prepare();
              view = getView();
              Gson gson = new Gson();
              Bean bean = gson.fromJson(str, Bean.class);
              String code = bean.getCode();
              String msg = bean.getMsg();
              if (code.equals("1")){
                  Toast.makeText((Context) view,msg+"",Toast.LENGTH_SHORT).show();
              }else {
                  Intent intent = new Intent((Context) view, LoginActivity.class);
                  ((Context) view).startActivity(intent);
              }
              Looper.loop();
          }

          @Override
          public void onFail(int errCode, String errMsg) {

          }
      });
  }
}

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IMainView：

 

public interface IMainView extends IBaseView{
    int setChildContentView();

    void onSuccess(String str);
}

-------------------------------------------------------------------------------------------------

LoginActivity：

 

public class LoginActivity extends BaseActitivty<LoginPresenter> implements ILoginView, View.OnClickListener {

    private EditText edit_name;
    private EditText edit_password;
    private Button login;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

    }

    @Override
    LoginPresenter setPresenter() {
        return new LoginPresenter();
    }

    @Override
    void initView() {
        edit_name = findViewById(R.id.edit_name);
        edit_password = findViewById(R.id.edit_password);
        login = findViewById(R.id.login);
        login.setOnClickListener(this);
    }

    @Override
    void initData() {

    }

    @Override
    int setChildContentView() {
        return R.layout.activity_login;
    }

    @Override
    public void onClick(View view) {
       switch (view.getId()){
           case R.id.login:
               String name = edit_name.getText().toString();
               String pwd = edit_password.getText().toString();
               if (pwd == null || pwd == ""){
                   Toast.makeText(LoginActivity.this,"密码不能为空",Toast.LENGTH_SHORT).show();
               }
               if (presenter != null){
                   String path = "user/login";
                   HashMap<String,String> hashMap = new HashMap<>();
                   hashMap.put("mobile",name);
                   hashMap.put("password",pwd);
                   presenter.login(path,hashMap);
               }
               break;
       }
    }

    @Override
    public void onSuccess(String str) {

    }
}

LoginPresenter：

 

public class LoginPresenter extends BasePresenter<ILoginView> {

    private final HttpUtils instance;

    public LoginPresenter(){
        instance = HttpUtils.getInstance();
    }
    public void login(String path, HashMap<String,String> map){
        instance.doPost(path,map,new HttpUtilsCallback(){

            @Override
            public void onSuccess(String str) {
                Log.e("zer","str="+str);
                Looper.prepare();
                ILoginView view = getView();
                Gson gson = new Gson();
                Bean bean = gson.fromJson(str, Bean.class);
                String code = bean.getCode();
                String msg = bean.getMsg();
                if (code.equals("1") ){
                    Toast.makeText((Context) view,""+msg,Toast.LENGTH_SHORT).show();
                }else {
                    Intent intent = new Intent((Context) view, HomeActivity.class);
                    ((Context) view).startActivity(intent);
                }
                Looper.loop();
            }

            @Override
            public void onFail(int errCode, String errMsg) {

            }
        });
    }
}

--------------------------------------------------------------------------

HttpUtils：

 

public class HttpUtils implements Callback{
    private static HttpUtils INSTANCE;
    private final OkHttpClient okHttpClient;
    private HttpUtilsCallback mHttpUtilsCallback;
    String url = "https://www.zhaoapi.cn/user/login?mobile=asd&password=123456";

    public HttpUtils() {
        okHttpClient = new OkHttpClient.Builder().build();
    }
    public static HttpUtils getInstance(){
        if (INSTANCE == null){
            INSTANCE = new HttpUtils();
        }
        return INSTANCE;
    }
    public static final MediaType JSON
            = MediaType.parse("application/json; charset=utf-8");
    public String doGet(String path){
        Request request = new Request.Builder().url(Constant.BASE_URL+path).build();
        Call call = okHttpClient.newCall(request);
        call.enqueue(this);
        return "ZhengEner";
    }
    public void doPost(String path, HashMap<String,String> map, HttpUtilsCallback httpUtilsCallback){
        this.mHttpUtilsCallback = httpUtilsCallback;
        FormBody.Builder builder = new FormBody.Builder();
        Iterator<String> iterator = map.keySet().iterator();
        while (iterator.hasNext()){
            String key = iterator.next();
            String value = map.get(key);
            builder.add(key,value);
        }
        FormBody formBody = builder.build();
        Request build = new Request.Builder()
                .url(Constant.BASE_URL+path)
                .post(formBody)
                .build();
        Call call = okHttpClient.newCall(build);
        call.enqueue(this);
    }

    @Override
    public void onFailure(Call call, IOException e) {

    }

    @Override
    public void onResponse(Call call, Response response) throws IOException {
        String string = response.body().string();
        mHttpUtilsCallback.onSuccess(string);
    }
}

Constant：

 

public class Constant {
    public static final String BASE_URL = "https://www.zhaoapi.cn/";
}

-------------------------------------------------------------------

HttpUtilsCallback：

 

public interface HttpUtilsCallback {
    void onSuccess(String str);
    void onFail(int errCode,String errMsg);

}

-------------------------------------------------------------------

 

CommonUtil：

/*
 *用正则表达式判断手机号：
 */

public class CommonUtil {
    public static boolean isMobileNO(String mobile){
        Pattern p = Pattern.compile("^((13[0-9])|(15[^4,\\D])|(18[0,5-9]))\\d{8}$");
        Matcher m = p.matcher(mobile);
        System.out.println(m.matches()+"-------");
        return m.matches();
    }
}