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功能
1、显示加载视图,加载失败的时候显示加载失败视图,数据为空时显示数据为空视图,支持为失败视图设置点击事件重新加载数据。
2、支持个性化设置,自定义设置 加载、失败、空数据视图。

先放一张效果图压压惊

实现
实现思路其实就是一个FrameLayout里添加三个布局做处理显示隐藏,自定义视图其实就是替换里面的view ,代码比较简单,如果直接看过我的自定义view系列文章,或者对自定义view有所了解,都很容易看懂,所有直接上代码了。
具体代码
Java 代码

public class CommonLoadingView extends FrameLayout {//加载时显示文字protected TextView mLoadingTextTv;public Context mContext;//加载错误视图protected LinearLayout mLoadErrorLl;//加载错误点击事件处理private LoadingHandler mLoadingHandler;//加载viewprivate View loadingView;//加载失败viewprivate View loadingErrorView;//数据为空private View emptyView;public CommonLoadingView(Context context, AttributeSet attrs) {this(context, attrs, 0);}public CommonLoadingView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);mContext = context;}public void setLoadingHandler(LoadingHandler loadingHandler) {mLoadingHandler = loadingHandler;}public void setLoadingErrorView(View loadingErrorView) {this.removeViewAt(1);this.loadingErrorView = loadingErrorView;this.loadingErrorView.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {if (mLoadingHandler != null) {mLoadingHandler.doRequestData();CommonLoadingView.this.load();}}});this.addView(loadingErrorView,1);}public void setLoadingView(View loadingView) {this.removeViewAt(0);this.loadingView = loadingView;this.addView(loadingView,0);}@Overrideprotected void onFinishInflate() {super.onFinishInflate();loadingView = inflate(mContext, R.layout.common_loading_view, null);loadingErrorView = inflate(mContext, R.layout.network_layout, null);emptyView = inflate(mContext, R.layout.empty_layout, null);this.addView(loadingView);this.addView(loadingErrorView);this.addView(emptyView);loadingErrorView.setVisibility(GONE);emptyView.setVisibility(GONE);initView(this);}public void setMessage(String message) {mLoadingTextTv.setText(message);}private void initView(View rootView) {mLoadingTextTv = (TextView) rootView.findViewById(R.id.loading_text_tv);mLoadErrorLl = (LinearLayout) rootView.findViewById(R.id.load_error_ll);mLoadErrorLl.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {if (mLoadingHandler != null) {CommonLoadingView.this.load();mLoadingHandler.doRequestData();}}});}public void load(){loadingView.setVisibility(VISIBLE);loadingErrorView.setVisibility(GONE);emptyView.setVisibility(GONE);}public void load(String message){mLoadingTextTv.setText(message);loadingView.setVisibility(VISIBLE);loadingErrorView.setVisibility(GONE);emptyView.setVisibility(GONE);}public void loadSuccess(){this.loadSuccess(false);}public void loadSuccess(boolean isEmpty){loadingView.setVisibility(GONE);loadingErrorView.setVisibility(GONE);if (isEmpty) {emptyView.setVisibility(VISIBLE);}else{emptyView.setVisibility(GONE);}}public void loadError(){loadingView.setVisibility(GONE);loadingErrorView.setVisibility(VISIBLE);}public interface LoadingHandler{void doRequestData();}}
使用
基本使用
几个基本的 load loadError loadSucccess方法的使用。
public class DefaultViewActivity extends AppCompatActivity {protected ListView mListView;protected CommonLoadingView mLoadingView;private List<String> mList = new ArrayList<>();ArrayAdapter adapter;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);super.setContentView(R.layout.activity_default_view);initView();}private void initView() {mListView = (ListView) findViewById(R.id.listView);mLoadingView = (CommonLoadingView) findViewById(R.id.loadingView);mLoadingView.load();//设置点击错误视图重新加载事件mLoadingView.setLoadingHandler(new CommonLoadingView.LoadingHandler() {@Overridepublic void doRequestData() {mLoadingView.postDelayed(new Runnable() {@Overridepublic void run() {for (int i = 1; i <=20 ; i++) {mList.add(i+"");}adapter = new ArrayAdapter(DefaultViewActivity.this, android.R.layout.simple_list_item_1, android.R.id.text1, mList);mListView.setAdapter(adapter);mLoadingView.loadSuccess(false);}},2500);}});//模拟网络错误,加载失败mLoadingView.postDelayed(new Runnable() {@Overridepublic void run() {mLoadingView.loadError();}},2500);}}
自定义视图 使用
只需要把自己自定义的view调用set方法设置进去即可。
this.mLoadingView.setLoadingView(loadingView);this.mLoadingView.setLoadingErrorView(loadingErrorView);
public class CustomViewActivity extends AppCompatActivity {protected ListView mListView;protected CommonLoadingView mLoadingView;private List<String> mList = new ArrayList<>();ArrayAdapter adapter;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);super.setContentView(R.layout.activity_default_view);initView();}private void initView() {mListView = (ListView) findViewById(R.id.listView);mLoadingView = (CommonLoadingView) findViewById(R.id.loadingView);//设置自定义视图ProgressBar progressBar = new ProgressBar(this);this.mLoadingView.setLoadingView(progressBar);TextView textView = new TextView(this);textView.setText("加载失败...");this.mLoadingView.setLoadingErrorView(textView);mLoadingView.load();//设置点击错误视图重新加载事件mLoadingView.setLoadingHandler(new CommonLoadingView.LoadingHandler() {@Overridepublic void doRequestData() {mLoadingView.postDelayed(new Runnable() {@Overridepublic void run() {for (int i = 1; i <=20 ; i++) {mList.add(i+"");}adapter = new ArrayAdapter(CustomViewActivity.this, android.R.layout.simple_list_item_1, android.R.id.text1, mList);mListView.setAdapter(adapter);mLoadingView.loadSuccess(false);}},2500);}});//模拟网络错误,加载失败mLoadingView.postDelayed(new Runnable() {@Overridepublic void run() {mLoadingView.loadError();}},2500);}}
至于具体的布局和样式文件就不贴了,主要是实现思路,代码
下载请参考源码下载 。

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