MVP其中有接口(x.http网络请求)

来源：互联网发布：网络优化教程编辑：程序博客网时间：2024/06/05 10:12

用到的接口:IView接口和IResponse接口

M:Model层:

public class HttpUtils {    private static final String TAG = "HttpUtils";    private static volatile HttpUtils instance;    private HttpUtils() {    }    /**     * 双重检验锁机制的单例     *     * @return     */    public static HttpUtils getInstance() {        if (instance == null) {            synchronized (HttpUtils.class) {                if (null == instance) {                    instance = new HttpUtils();                }            }        }        return instance;    }    /**     * 网络请求get方式     *     * @param url     * @param params     */    public void get(String url, Map<String, String> params, final IResponse response) {        RequestParams requestParams = new RequestParams(url);        /**         * Map<String, String> map = new HashMap()<>         *     map.put("mobile", "155567");         *     map.put("password","123456");         * </></>         */        // map遍历        for (Map.Entry<String, String> entry : params.entrySet()) {            requestParams.addQueryStringParameter(entry.getKey(),                    entry.getValue());        }        // 做网络请求        x.http().get(requestParams, new Callback.CommonCallback<String>() {            @Override            public void onSuccess(String result) {                Log.i(TAG, "onSuccess: " + result);                response.onSuccess(result);            }            @Override            public void onError(Throwable ex, boolean isOnCallback) {                Log.e(TAG, "onError: " + ex.getMessage());                response.onFailed(ex.getMessage());            }            @Override            public void onCancelled(CancelledException cex) {            }            @Override            public void onFinished() {            }        });    }}

V:View层:

public class MainActivity extends AppCompatActivity implements View.OnClickListener,IView {        private static final String TAG = "MainActivity";        private EditText etUsername;        private EditText etPassword;        private Button btnLogin;        private TextView txtShow;        private  LoginPresenter presenter;        @Override        protected void onCreate(Bundle savedInstanceState) {            super.onCreate(savedInstanceState);            setContentView(R.layout.activity_main);            etUsername = (EditText) findViewById(R.id.et_username);            etPassword = (EditText) findViewById(R.id.et_password);            btnLogin = (Button) findViewById(R.id.btn_login);            txtShow = (TextView) findViewById(R.id.txt_show);            btnLogin.setOnClickListener(this);        }        @Override        public void onClick(View v) {            switch (v.getId()){                case R.id.btn_login:                    String username = etUsername.getText().toString().trim();                    String password  =etPassword.getText().toString().trim();                    // 创建P的对象                    presenter = new LoginPresenter();                    presenter.attachView(this);//                LoginPresenter presenter1 = new LoginPresenter(this);                    // 并且调用P层的方法                    presenter.login(username, password);                    break;            }        }        @Override        public void success(String data) {            // 接收到P层传过来的数据之后做修改View的操作            txtShow.setText("登录成功");        }        @Override        public void failed(String message) {            txtShow.setText("登录失败");        }        // V层销毁之后调用P层提供的解绑方法        @Override        protected void onDestroy() {            super.onDestroy();            if (presenter != null) {                presenter.detatch();            }        }    }

P:Presenter层:

public class LoginPresenter {    private IView iView;    // 提供初始化IView对象的一个方法    public LoginPresenter() {    }    public LoginPresenter(IView iView) {        this.iView = iView;    }    public void attachView(IView iView) {        this.iView = iView;    }    /**     * 登录     * @param username     * @param password     */    // 调用Model层的请求网络或数据库的方法    public void login(String username, String password) {        Map<String, String> map = new HashMap<>();        map.put("mobile", username);        map.put("password", password);        HttpUtils.getInstance().get("http://120.27.23.105/user/login", map,                new IResponse() {                    @Override                    public void onSuccess(String data) {                        // 把M层拿到的数据回调给V层                        iView.success(data);                    }                    @Override                    public void onFailed(String message) {                        iView.failed(message);                    }                });    }    /**     * 提供解绑的方法，避免内存泄漏     */    public void detatch(){        if (iView != null) {            iView = null;        }    }}

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