写一个多状态View

在app开发过程中很多时候我们需要访问网络&＃xff0c;访问数据库等&＃xff0c;此时app将会有多种状态&＃xff0c;比如加载中&＃xff0c;加载成功&＃xff0c;加载失败&＃xff0c;没有网络等等&＃xff0c;此时如果我们使用弹出的方式告知用户&＃xff0c;非常不友好。之前被产品爸爸说有种笨重的感觉&＃xff0c;但是笨重这么抽象你告诉我我TM该怎么理解呢&＃xff1f; 经过leader的暗示解答&＃xff0c;终于知道原来他想要那种感觉&＃xff0c;就是那种看起来不笨重的感觉&＃xff0c;翻译过来就是使用多状态&＃xff0c;那么应该怎么做呢&＃xff1f;看到过有人封装在BaseFragment和BaseActivity&＃xff0c;但是这样子做耦合度太高&＃xff0c;而且看起来代码也比较笨重&＃xff0c;是的又回到了笨重这个话题。 ####效果演示那么笨重feel是怎样的呢&＃xff1f;

那么一般我们应该怎么做呢&＃xff1f; 看看下面的小图图&＃xff1a;

####整体结构那么它的整体结构是怎样的呢&＃xff1f;

从上面的整体结构i图可以知道主要有以下方法&＃xff1a;

createView() 构造方法&＃xff0c;这里重载了两个&＃xff0c;分别使用默认的view以及使用you like view onLoad() 加载方法&＃xff0c;显示loadingview onEmpty() 空数据&＃xff0c;显示emptyView onError() 加载出错&＃xff0c;显示errorView onNoNet() 没有网络&＃xff0c;显示noNetView onSuccess 加载成功&＃xff0c;显示构造方法传入的contentView onDestory() 资源回收 setOnRetryClick() 提供点击重新加载的接口

####使用使用方法很简单&＃xff0c;根据上面的整体结构

构造StatusViewManager manager &＃61; StatusViewManager.createView(Context, ContentView);
加载manager.onLoad()
根据情况调用各种状态

####代码实现 #####StatusViewManager

/*** Created by AmatorLee on 2017/7/12.*/public class StatusViewManager extends StatusInterface implements View.OnClickListener {private LayoutInflater mInflater;/*** 加载view*/private View mLoadView;/*** 错误view*/private View mErrorView;/*** 无数据view*/private View mEmptyView;/*** 实际view*/private View mContentView;/*** 无网络链接时得view*/private View mNoNetView;private RelativeLayout.LayoutParams mParams;/*** 保存状态view的container*/private RelativeLayout mStatusContainer;private Context mContext;/*** 避免重复添加*/private boolean isAddLoad, isAddEmpty, isAddNoNet, isAddError;/*** 可见状态*/public static final int V &＃61; View.VISIBLE;/**** 不可见状态*/public static final int G &＃61; View.GONE;/*** 重新加载接口*/private onRetryClick mOnRetryClick;/*** 切换到主线程改变view的状态*/private Handler mMainThreadHandler;private int empty_layout_id &＃61; -1;private int error_layout_id &＃61; -1;private int no_net_layout_id &＃61; -1;private int loading_layout_id &＃61; -1;public static final String ERROR &＃61; "error";public static final String EMPTY &＃61; "empty";public static final String NONET &＃61; "nonet";public static final String LOAD &＃61; "load";public void setOnRetryClick(onRetryClick onRetryClick) {mOnRetryClick &＃61; onRetryClick;}private StatusViewManager(Context context, View contentView, int loading_layout_id, int empty_layout_id, int error_layout_id, int no_net_layout_id) {super();this.loading_layout_id &＃61; loading_layout_id;this.empty_layout_id &＃61; empty_layout_id;this.error_layout_id &＃61; error_layout_id;this.no_net_layout_id &＃61; no_net_layout_id;mContentView &＃61; contentView;mMainThreadHandler &＃61; new Handler(Looper.getMainLooper());mContext &＃61; context;mInflater &＃61; LayoutInflater.from(context);mParams &＃61; new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);mParams.addRule(RelativeLayout.CENTER_IN_PARENT);initView();setOnClick();initContainer();}private void setOnClick() {if (mEmptyView !&＃61; null)mEmptyView.setOnClickListener(this);if (mNoNetView !&＃61; null)mNoNetView.setOnClickListener(this);if (mErrorView !&＃61; null)mErrorView.setOnClickListener(this);}public static StatusViewManager createView(Context context, View ContentView) {return new StatusViewManager(context, ContentView, -1, -1, -1, -1);}public static StatusViewManager createView(Context context, View contentView, int loading_layout_id, int empty_layout_id, int error_layout_id, int no_net_layout_id) {return new StatusViewManager(context, contentView, loading_layout_id, empty_layout_id, error_layout_id, no_net_layout_id);}&＃64;Overrideprotected void initView() {if (loading_layout_id &＃61;&＃61; -1) {loading_layout_id &＃61; R.layout.layout_loading;}if (empty_layout_id &＃61;&＃61; -1) {empty_layout_id &＃61; R.layout.layout_empty;}if (error_layout_id &＃61;&＃61; -1) {error_layout_id &＃61; R.layout.layout_error;}if (no_net_layout_id &＃61;&＃61; -1) {no_net_layout_id &＃61; R.layout.layout_no_net;}try {mLoadView &＃61; mInflater.inflate(loading_layout_id, null);mLoadView.setTag(LOAD);mErrorView &＃61; mInflater.inflate(error_layout_id, null);mErrorView.setTag(ERROR);mEmptyView &＃61; mInflater.inflate(empty_layout_id, null);mEmptyView.setTag(EMPTY);mNoNetView &＃61; mInflater.inflate(no_net_layout_id, null);mNoNetView.setTag(NONET);} finally {mInflater &＃61; null;}}&＃64;Overridepublic void initContainer() {mStatusContainer &＃61; new RelativeLayout(mContext);mStatusContainer.setLayoutParams(mParams);ViewGroup parent &＃61; (ViewGroup) mContentView.getParent();parent.addView(mStatusContainer);}&＃64;Overridepublic void onLoad() {mMainThreadHandler.post(new Runnable() {&＃64;Overridepublic void run() {if (mLoadView !&＃61; null && !isAddLoad) {isAddLoad &＃61; true;mStatusContainer.addView(mLoadView, mParams);}show(STATUS.LOADING);}});}private void show(STATUS result) {switch (result) {case SUCCESS:changeVisiable(V, G, G, G, G);break;case LOADING:changeVisiable(G, V, G, G, G);break;case NONET:changeVisiable(G, G, G, G, V);break;case ERROR:changeVisiable(G, G, G, V, G);break;case EMPTY:changeVisiable(G, G, V, G, G);break;}}private void changeVisiable(final int contentStatus, final int loadStatus, final int emptyStatus, final int errorStatus, final int nonetStatus) {if (mContentView !&＃61; null) {mContentView.setVisibility(contentStatus);}if (mLoadView !&＃61; null) {mLoadView.setVisibility(loadStatus);}if (mEmptyView !&＃61; null) {mEmptyView.setVisibility(emptyStatus);}if (mNoNetView !&＃61; null) {mNoNetView.setVisibility(nonetStatus);}if (mErrorView !&＃61; null) {mErrorView.setVisibility(errorStatus);}}&＃64;Overridepublic void onSuccess() {mMainThreadHandler.post(new Runnable() {&＃64;Overridepublic void run() {show(STATUS.SUCCESS);}});}&＃64;Overridepublic void onNoNet() {mMainThreadHandler.post(new Runnable() {&＃64;Overridepublic void run() {if (!isAddNoNet && mNoNetView !&＃61; null) {mStatusContainer.addView(mNoNetView, mParams);isAddNoNet &＃61; true;}show(STATUS.NONET);}});}&＃64;Overridepublic void onError() {mMainThreadHandler.post(new Runnable() {&＃64;Overridepublic void run() {if (!isAddError && mErrorView !&＃61; null) {mStatusContainer.addView(mErrorView, mParams);isAddError &＃61; true;}show(STATUS.ERROR);}});}&＃64;Overridepublic void onEmpty() {mMainThreadHandler.post(new Runnable() {&＃64;Overridepublic void run() {if (!isAddEmpty && mEmptyView !&＃61; null) {mStatusContainer.addView(mEmptyView, mParams);isAddEmpty &＃61; true;}show(STATUS.EMPTY);}});}&＃64;Overridepublic void onClick(View view) {if (mOnRetryClick !&＃61; null) {mOnRetryClick.onRetryLoad();}}public enum STATUS {LOADING,EMPTY,ERROR,SUCCESS,NONET}&＃64;Overridepublic void onDestory() {isAddNoNet &＃61; false;isAddEmpty &＃61; false;isAddLoad &＃61; false;isAddError &＃61; false;mContext &＃61; null;if (mLoadView !&＃61; null) {mLoadView &＃61; null;}if (mContentView !&＃61; null) {mContentView &＃61; null;}if (mEmptyView !&＃61; null) {mEmptyView &＃61; null;}if (mErrorView !&＃61; null) {mErrorView &＃61; null;}if (mNoNetView !&＃61; null) {mNoNetView &＃61; null;}if (mParams !&＃61; null) {mParams &＃61; null;}for (int i &＃61; 0; i #####StatusInterface

/**

Created by AmatorLee on 2017/7/12. */

public abstract class StatusInterface {

protected abstract void initView();protected abstract void initContainer();protected abstract void onLoad();protected abstract void onSuccess();protected abstract void onNoNet();protected abstract void onError();protected abstract void onEmpty();protected abstract void onDestory();

}你可能会问为什么要提供一个StatusInterface&＃96;&＃96;&＃96;,但是我不告诉你。 ####总结现在流行的直播平台大都是这个小技巧&＃xff0c;虽然简单但是常用&＃xff0c;所有自己简单的写一下&＃xff0c;如果你发现有bug&＃xff0c;尽情反馈&＃xff0c;同时我也会自我完善。最后&＃xff0c;provide a gayhub demo