二：IView + IPresenter + 响应体泛型 + p
2020-08-05 本文已影响0人
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- IView
public interface IView {
/**
* 显示错误消息
*
* @param message 内容
*/
void showError(String message);
/**
* 显示加载进度
*/
void showLoading();
/**
* 隐藏加载进度
*/
void hideLoading();
}
- IPresenter
/**
* presenter 持有view，可能会造成内存泄露，所以需要的onDestroy（）加一个销毁view 的方法
* 也需要考虑到，view被销毁
*
* @param <V> view
*/
public interface IPresenter<V extends IView> {
void attach(V v);
void dettach();
}
- 响应体泛型
/**
* 响应体
*
* @param <T> 泛型bean
*/
public class Response<T> {
private String code; // 返回的code
private T data; // 具体的数据结果
private String msg; // message 可用来返回接口的说明
public String getCode() {
return code;
}
public void setCode(String ret) {
this.code = ret;
}
public T getData() {
return data;
}
public void setData(T data) {
this.data = data;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public boolean isSuccess() {
return "success".equalsIgnoreCase(code);
}
}
- presenter 弱引用持有
CompositeDisposable 讲解
/**
* 考虑到内存泄漏问题，presenter 持有 view 的引用改为弱引用
*
* @param <V> view
*/
public abstract class AbstractPresenter<V extends IView> {
private V mView;
protected Context mContext;
protected SoftReference<V> vSoftReference;
public AbstractPresenter(Context context) {
this.mContext = context;
getCompositeDisposable();
}
// 解决 rxjava 请求内存泄漏问题
private CompositeDisposable mCompositeDisposable;
protected void bindView(V v) {
if (vSoftReference == null) {
vSoftReference = new SoftReference<>(v);
}
getCompositeDisposable();
mView = (V) Proxy.newProxyInstance(v.getClass().getClassLoader(), getView().getClass().getInterfaces(), new InvocationHandler() {
@Override
public Object invoke(Object o, Method method, Object[] objects) throws Throwable {
if (vSoftReference == null || vSoftReference.get() == null) {
return null;
}
return method.invoke(vSoftReference.get(), objects);
}
});
}
public CompositeDisposable getCompositeDisposable() {
if (mContext instanceof BaseActivity) {
mCompositeDisposable = ((BaseActivity)mContext).getCompositeDisposable();
} else if (mContext instanceof BaseMvpActivity) {
mCompositeDisposable = ((BaseMvpActivity)mContext).getCompositeDisposable();
} else {
if (mCompositeDisposable == null) {
mCompositeDisposable = new CompositeDisposable();
}
}
return mCompositeDisposable;
}
protected V getView() {
if (vSoftReference != null) {
mView = vSoftReference.get();
}
return mView;
}
protected void destroy() {
if (mCompositeDisposable != null) {
mCompositeDisposable.clear();
}
if (vSoftReference != null) {
vSoftReference.clear();
vSoftReference = null;
}
}
}
- ResponseException
public abstract class ResponseException implements Consumer<Throwable> {
/**
* 未知错误
*/
public static final int UNKNOWN = 1000;
/**
* 解析错误
*/
public static final int PARSE_ERROR = 1001;
/**
* 网络错误
*/
public static final int NETWORK_ERROR = 1002;
/**
* 协议错误
*/
public static final int HTTP_ERROR = 1003;
private Context mContext;
public ResponseException(Context context) {
if (context != null) {
this.mContext = context.getApplicationContext();
}
}
@Override
public void accept(Throwable throwable) throws Exception {
ApiException ex = handleException(throwable);
if (BuildConfig.DEBUG) {
Log.e("response--", throwable.toString());
}
onError(ex);
}
private ApiException handleException(Throwable e) {
ApiException ex;
if (e instanceof JsonParseException
|| e instanceof JSONException
|| e instanceof ParseException) {
//解析错误
ex = new ApiException(PARSE_ERROR, e.getMessage(), "解析错误！");
return ex;
} else if (e instanceof ConnectException) {
//网络错误
ex = new ApiException(NETWORK_ERROR, e.getMessage(), "网络错误！");
return ex;
} else if (e instanceof UnknownHostException) {
//连接错误
ex = new ApiException(NETWORK_ERROR, e.getMessage(), "网络错误！");
return ex;
}else if (e instanceof SocketTimeoutException) {
//连接错误
ex = new ApiException(NETWORK_ERROR, e.getMessage(), "网络连接超时！");
return ex;
} else if (e instanceof HttpException
|| e instanceof HttpRetryException
|| e instanceof retrofit2.adapter.rxjava2.HttpException) {
ex = new ApiException(NETWORK_ERROR, e.getMessage(), "网络或服务器异常！");
return ex;
} else {
//未知错误
ex = new ApiException(UNKNOWN, e.getMessage(), "错误！");
if (mContext != null) {
if (!isNetworkReachable(mContext)) {
ex = new ApiException(NETWORK_ERROR, e.getMessage(), "网络未连接！");
} else {
if (isNetworkAvailable(mContext)) {
ex = new ApiException(NETWORK_ERROR, e.getMessage(), "网络连接不可用！");
}
}
}
return ex;
}
}
public abstract void onError(ApiException e);
/**
* 网络是否连接
*
* @param context
* @return
*/
private boolean isNetworkReachable(Context context) {
ConnectivityManager connectivityManager = (ConnectivityManager) context.getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
@SuppressLint("MissingPermission") NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isConnected()) {
// 网络连接
return true;
}
return false;
}
/**
* 网络状态
*
* @param context
* @return
*/
private boolean isNetworkAvailable(Context context) {
ConnectivityManager cm = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (cm == null) {
} else {
//如果仅仅是用来判断网络连接
//则可以使用 cm.getActiveNetworkInfo().isAvailable();
@SuppressLint("MissingPermission") NetworkInfo[] info = cm.getAllNetworkInfo();
if (info != null) {
for (int i = 0; i < info.length; i++) {
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
}
}
return false;
}
}
ApiException
public class ApiException extends Exception {
private int code;
private String errMessage;
private String showMessage;
public ApiException(int code, String errMessage, String showMessage) {
this.code = code;
this.errMessage = errMessage;
this.showMessage = showMessage;
}
public String getShowMessage() {
return showMessage;
}
public void setShowMessage(String showMessage) {
this.showMessage = showMessage;
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getErrMessage() {
return errMessage;
}
public void setErrMessage(String errMessage) {
this.errMessage = errMessage;
}
}
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