Android 自定义通用的loadingview _android

丈夫欲遂平生志，一载寒窗一举汤。这篇文章主要讲述Android 自定义通用的loadingview相关的知识，希望能为你提供帮助。
介绍好久没有写博客啦，接近新年了，年前的工作都要收尾，所以特别忙，周末抽空写了个通用的加载view,写篇博客分享出来。

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

文章图片

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

【Android 自定义通用的loadingview】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
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