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view private View loadingView; //加载失败view private 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() { @Override public 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); } @Override protected 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() { @Override public 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; @Override protected 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() { @Override public void doRequestData() { mLoadingView.postDelayed(new Runnable() { @Override public 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() { @Override public 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; @Override protected 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() { @Override public void doRequestData() { mLoadingView.postDelayed(new Runnable() { @Override public 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() { @Override public 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 。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。