MVP的简单封装

MVP框架的耦合性很低,应用于大型项目时条例清晰,方便单元测试 6666
整理下自己写的一个简单的MVP+Rxjava+retrofit的框架
M层请求数据 P层为M与V传递信息类似于中介 V层处理逻辑代码

目录.png

各种依赖

    compile 'com.squareup.retrofit2:retrofit:2.3.0'
    // Json依赖（根据需要选择）
    compile 'com.squareup.retrofit2:converter-gson:2.3.0'
    // 字符串依赖（根据需要选择）
    compile 'com.squareup.retrofit2:converter-scalars:2.3.0'
    // RxJava2支持（根据需要选择）
    compile 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'
    compile 'io.reactivex.rxjava2:rxjava:2.0.1'
    compile 'io.reactivex.rxjava2:rxandroid:2.0.1'

首先先写一个Constant类 保存一些 常用且不变的的属性与一些常用的小工具提高代码的复用性

public class Constant {
    public static String SYSTEM_SHARE_NAME="config";

    //这是我自己本机的一个服务器的接口
    public static final String LINK_MAIN = "http://169.254.157.229/mobile/";
    public static SharedPreferences mSharedPreferences;
    public static SharedPreferences.Editor mSharedPreferencesEditor;
    public static Gson gson;
    //初始化
    public static void init(Context context) {
        mSharedPreferences = context.getSharedPreferences(Constant.SYSTEM_SHARE_NAME, Activity.MODE_PRIVATE);
        mSharedPreferencesEditor = mSharedPreferences.edit();
        gson=new Gson();
    }
    //gson封装
    public static <T> T GsonToBean(String gsonString, Class<T> cls) {
        T t = null;
        if (gson != null) {
            t = gson.fromJson(gsonString, cls);
        }
        return t;
    }
}

然后就可以写网络请求了 这里我是用的Rxjava+Retrofit结合的网络框架
首先 先把retrofit需要用到的API接口类写出来

就是简单的一个get 与一个简单的post

public interface Api {

    @GET("index.php")
    Observable<String> getTest(@QueryMap Map<String,String> map);

    @FormUrlEncoded
    @POST("index.php")
    Observable<String> postTest(@FieldMap Map<String,String> map);
}

之后将Httputil类写出

public class HttpUtil {
   private static Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(Constant.LINK_MAIN)
            .addConverterFactory(ScalarsConverterFactory.create())
            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
            .build();
    //get封装
    public static void get(Observer<String> observer, Map<String,String> map){
        Api api = retrofit.create(Api.class);
        Observable<String> observable = api.getTest(map);
        observable.observeOn(AndroidSchedulers.mainThread())
                .subscribeOn(Schedulers.io())
                .subscribe(observer);
    }
    //post封装
    public static void post(Observer<String> observer, Map<String,String> map){
        Api api = retrofit.create(Api.class);
        Observable<String> observable = api.postTest(map);
        observable.observeOn(AndroidSchedulers.mainThread())
                .subscribeOn(Schedulers.io())
                .subscribe(observer);
    }

}

返回类型这里我用的String
之后会在Prenter层里面进行转换Bean
这样Api接口与Httputil类就可以少些很多很多

在Presenter层中封装一个BasePresenter来抽出一些公共的Present方法

public class BasePresenter<T extends IBaseView>{
    private T t;

    //关联activity
    public void attach(T t){
        this.t=t;
    }
    public IBaseView getiBaseView() {
        return t;
    }

    //取消关联activity
    public void detach(){
        if(this.t!=null){
            t=null;
        }
    }

}

presenter层中利用rxjava接收到网络请求的数据 然后用Gson类将Json转换为Bean
最后将转换完成的Bean回调到Activity

public class TestPreseneter extends BasePresenter<IBaseView<ClassBean>>{


    public <T>void get(Map<String,String> map, final Class<T> cla) {
        HttpUtil.get(new Observer<String>() {
            @Override
            public void onSubscribe(Disposable d) {

            }
            @Override
            public void onNext(String value) {
                Log.e("json", value );
                T t = Constant.GsonToBean(value, cla);
                getiBaseView().onData(t);
            }
            @Override
            public void onError(Throwable e) {
                getiBaseView().onError(e);
            }
            @Override
            public void onComplete() {
            }
        }, map);
    }
}

activity接收数据
这里我的activity继承的是我自己cv的一个Baseactivity :)

public class MainActivity extends BaseAvtivity implements IBaseView<ClassBean> {

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

    @Override
    protected void initUI() {

    }

    @Override
    protected void initData() {
        TestPreseneter t=new TestPreseneter();
        t.attach(this);
        HashMap<String, String> m = new HashMap<>();
        m.put("act","goods_class");
        m.put("op","goods_detail");
        m.put("gc_id","4");
        t.get(m,ClassBean.class);
    }

    @Override
    protected void initListener() {

    }


    @Override
    public void onData(ClassBean classBean) {
        showShort(classBean.getCode()+"");
    }

    @Override
    public void onError(Throwable throwable) {
        Log.e("onerror", throwable.toString() );
    }
}

public abstract class BaseAvtivity extends AppCompatActivity{

    /** 用来保存所有已打开的Activity */
    private static Stack<Activity> listActivity = new Stack<Activity>();

    /** 提示信息 **/
    private Toast mToast;

    /** 记录上次点击按钮的时间 **/
    private long lastClickTime;
    /** 按钮连续点击最低间隔时间 单位：毫秒 **/
    public final static int CLICK_TIME = 500;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 设置activity为无标题栏
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        // 将activity推入栈中
        listActivity.push(this);
        // 初始化ui
        initUI();
        // 初始化数据
        initData();
        // 事件监听
        initListener();

    }

    /** 初始化ui **/
    protected abstract void initUI();

    /** 初始化数据 **/
    protected abstract void initData();

    /** 初始化监听 **/
    protected abstract void initListener();

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        saveInstanceState(outState);
        super.onSaveInstanceState(outState);
    }

    /** 保存activity状态 **/
    protected void saveInstanceState(Bundle outState) {

    }

    @Override
    public void onBackPressed() {
        super.onBackPressed();

    }

    public void onBack(View v) {
        finish();
    }

    @Override
    protected void onResume() {
        super.onResume();

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        // 从栈中移除当前activity
        if (listActivity.contains(this)) {
            listActivity.remove(this);
        }

    }

    /********************** activity跳转 **********************************/
    public void openActivity(Class<?> targetActivityClass) {
        openActivity(targetActivityClass, null);
    }

    public void openActivity(Class<?> targetActivityClass, Bundle bundle) {
        Intent intent = new Intent(this, targetActivityClass);
        if (bundle != null) {
            intent.putExtras(bundle);
        }
        startActivity(intent);
    }

    public void openActivityAndCloseThis(Class<?> targetActivityClass) {
        openActivity(targetActivityClass);
        this.finish();
    }

    public void openActivityAndCloseThis(Class<?> targetActivityClass, Bundle bundle) {
        openActivity(targetActivityClass, bundle);
        this.finish();
    }

    /***************************************************************/

    /** 验证上次点击按钮时间间隔，防止重复点击 */
    public boolean verifyClickTime() {
        if (System.currentTimeMillis() - lastClickTime <= CLICK_TIME) {
            return false;
        }
        lastClickTime = System.currentTimeMillis();
        return true;
    }

    /** 收起键盘 */
    public void closeInputMethod() {
        // 收起键盘
        View view = getWindow().peekDecorView();// 用于判断虚拟软键盘是否是显示的
        if (view != null) {
            InputMethodManager inputmanger = (InputMethodManager) getSystemService(Activity.INPUT_METHOD_SERVICE);
            inputmanger.hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
        }
    }

    /**
     * 获取string
     *
     * @param mRid
     * @return
     */
    public String getStringMethod(int mRid) {
        return this.getResources().getString(mRid);
    }

    /**
     * 获取demin
     *
     * @param mRid
     * @return
     */
    protected int getDemonIntegerMethod(int mRid) {
        return (int) this.getResources().getDimension(mRid);
    }

    /**
     * 关闭所有(前台、后台)Activity,注意：请已BaseActivity为父类
     */
    protected static void finishAll() {
        int len = listActivity.size();
        for (int i = 0; i < len; i++) {
            Activity activity = listActivity.pop();
            activity.finish();
        }
    }

    /***************** 双击退出程序 ************************************************/
    private long exitTime = 0;

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {

        if (KeyEvent.KEYCODE_BACK == keyCode) {
            // 判断是否在两秒之内连续点击返回键，是则退出，否则不退出
            if (System.currentTimeMillis() - exitTime > 2000) {
                Toast.makeText(getApplicationContext(), "再按一次退出程序", Toast.LENGTH_SHORT).show();
                // 将系统当前的时间赋值给exitTime
                exitTime = System.currentTimeMillis();
            } else {
                finishAll();
            }
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }
    // short吐司
    public void showShort(String text) {
        Toast.makeText(this, text, Toast.LENGTH_SHORT).show();
    }

    // long吐司
    public void showLong(String text) {
        Toast.makeText(this, text, Toast.LENGTH_LONG).show();
    }
}