MVP+RxAndroid+Retrogit封裝的獲取網路（2）
阿新 • • 發佈：2018-12-20
上篇部落格簡單的介紹但是沒有結合實際,下面我們這篇只說下如何進行真實的請求網路應用
基礎介紹
效果:UI佈局詳解
1.匯入依賴
//fresco implementation 'com.facebook.fresco:fresco:1.11.0' //recyclerview列表展示 implementation 'com.android.support:recyclerview-v7:28.0.0' implementation 'com.jcodecraeer:xrecyclerview:1.2.0' //Rxjava和RxAndroid implementation 'io.reactivex.rxjava2:rxjava:2.2.4' implementation 'io.reactivex.rxjava2:rxandroid:2.1.0' //butterknife implementation 'com.jakewharton:butterknife:8.8.1' annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1' //retrofit implementation 'com.squareup.retrofit2:adapter-rxjava2:2.3.0' implementation 'com.squareup.retrofit2:converter-gson:2.5.0' //卡片佈局 implementation 'com.android.support:cardview-v7:28.0.0'
2.MainActivity佈局
<com.jcodecraeer.xrecyclerview.XRecyclerView
android:id="@+id/main_xrv_showlist"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
3.MainActivity程式碼
public class MainActivity extends BaseMVP<GoodsView,GoodsPresenter> { //找控制元件 @BindView(R.id.main_xrv_showlist) XRecyclerView mXRecyclerView; private Unbinder mBind; private MyAdapter mAdapter; @Override public GoodsPresenter initPresenter() { //例項化P return new GoodsPresenter(); } @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); //註冊Butterknife mBind = ButterKnife.bind(this); } @Override protected int initLayout() { return R.layout.activity_main; } @Override protected void initData() { presenter.getData(new GoodsView<NetWork>() { @Override public void success(NetWork data) { List<NetWork.DataBean> list = data.getData(); //設定資料 mAdapter.setData(list); //設定介面卡 mXRecyclerView.setAdapter(mAdapter); //佈局管理器 mXRecyclerView.setLayoutManager(new GridLayoutManager(MainActivity.this,2)); } }); } @Override protected void initView() { //建立介面卡 mAdapter = new MyAdapter(this); } @Override protected void onDestroy() { super.onDestroy(); //取消註冊Butterknife mBind.unbind(); } }
4.看到了上面Activity的繼承,那麼下面就開始我們寫我們的MVP+Retrofit+RxJava
Presenter程式碼
/** * date:2018/12/18 * author:輝(家輝輝輝) * function:P層的基類 */ public class BasePresenter<T>{ public T view; //建立 public void attach(T view){ this.view = view; } //銷燬 public void detach(){ this.view = null ; } }
MVP的基類,注意一點,並不是所有的介面都要用MVP所以我們就不繼承基類了,不需要MVP的介面再寫基類
/**
* date:2018/12/18
* author:輝(家輝輝輝)
* function:MVP的基類
* 這裡用V,T主要是代表了通用性,一個介面適合被不同型別的Activity繼承
*/
public abstract class BaseMVP<V,T extends BasePresenter<V>> extends Activity {
//宣告變數
public T presenter;
//初始化P
public abstract T initPresenter();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(initLayout());
//進行賦值讓我們在繼承這個Activity的時候就自動生成帶返回值的方法,而且可以呼叫這個類的變數
presenter = initPresenter();
//初始化佈局
initView();
//初始化資料
initData();
}
protected abstract int initLayout();
protected abstract void initData();
protected abstract void initView();
@Override//建立
protected void onResume() {
super.onResume();
presenter.attach((V) this);
}
@Override//置為空為了解決記憶體洩漏
protected void onDestroy() {
super.onDestroy();
presenter.detach();
}
}
下面就進行一個網路的傳值呼叫
請求網路的介面
public interface ApiServer {
@GET("ad/getAd")//這個地方是請求體
Observable<NetWork> getNetMessage();
}
請求網路的工具類
public class RetrofitUtils {
//宣告類名
private static volatile RetrofitUtils sRetrofitUtils;
private final OkHttpClient mClient;
//單例建立物件
private RetrofitUtils() {
//建立OkHttpClient,可以再次新增攔截器
mClient = new OkHttpClient.Builder()
.connectTimeout(10, TimeUnit.SECONDS)
.readTimeout(10, TimeUnit.SECONDS)
.writeTimeout(10, TimeUnit.SECONDS)
.build();
}
//通過單例建立類
public static RetrofitUtils getInstance(){
if(sRetrofitUtils == null){
synchronized (RetrofitUtils.class){
if(sRetrofitUtils == null){
sRetrofitUtils = new RetrofitUtils();
}
}
}
return sRetrofitUtils;
}
//暴露方法
public Observable<NetWork> doGet(String url){
//建立介面
ApiServer apiServer = new Retrofit.Builder()
.client(mClient)
.baseUrl(url)
.addCallAdapterFactory(RxJava2CallAdapterFactory.create())
.addConverterFactory(GsonConverterFactory.create())
.build().create(ApiServer.class);
//返回方法,並設定非同步
return apiServer.getNetMessage()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread());
}
}
M層呼叫工具類
public class GoodsModel {
//方法、傳入介面
public void getData(final GoodsView<NetWork> goodsView){
//通過單例獲取例項
RetrofitUtils instance = RetrofitUtils.getInstance();
//呼叫方法
Observable<NetWork> netWorkObservable = instance.doGet(CaUrl.goodsUrl);
//通過訂閱傳給觀察者
netWorkObservable.subscribe(new Observer<NetWork>() {
@Override
public void onSubscribe(Disposable d) {
}
@Override
public void onNext(NetWork netWork) {
if(netWork != null){
//存入介面
goodsView.success(netWork);
}
}
@Override
public void onError(Throwable e) {
}
@Override
public void onComplete() {
}
});
}
}
P層調M層,這裡的P就要繼承P層的基類了
public class GoodsPresenter extends BasePresenter<GoodsView> {
private final GoodsModel model;
//無參構造
public GoodsPresenter() {
//宣告並例項化M層
model = new GoodsModel();
}
//封裝方法傳入介面
public void getData(final GoodsView<NetWork> goodsView){
model.getData(new GoodsView<NetWork>() {
@Override
public void success(NetWork data) {
//存在
goodsView.success(data);
}
});
}
}
然後我們再去MainActivity,就會很清楚的看到這層關係