Android Material加载进度条制作代码

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" 
  android:background="@color/bg_color" 
  android:orientation="vertical" > 
 
  <in.srain.cube.views.ptr.PtrFrameLayout 
    xmlns:cube_ptr="http://schemas.android.com/apk/res-auto" 
    android:id="@+id/material_style_ptr_frame" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    cube_ptr:ptr_duration_to_close="100" 
    cube_ptr:ptr_duration_to_close_header="100" 
    cube_ptr:ptr_keep_header_when_refresh="true" 
    cube_ptr:ptr_pull_to_fresh="false" 
    cube_ptr:ptr_ratio_of_header_height_to_refresh="1.2" 
    cube_ptr:ptr_resistance="1.7" > 
 
    <ListView 
      android:id="@+id/article_listview" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:cacheColorHint="#00000000" 
      android:divider="@color/line" 
      android:dividerHeight="10dp" /> 
  </in.srain.cube.views.ptr.PtrFrameLayout> 
 
</LinearLayout>

mPtrFrameLayout = (PtrFrameLayout) mRootView.findViewById(R.id.material_style_ptr_frame); 
     
    // header 
    final MaterialHeader header = new MaterialHeader(getActivity()); 
    int[] colors = getResources().getIntArray(R.array.google_colors); 
    header.setColorSchemeColors(colors); 
    header.setLayoutParams(new PtrFrameLayout.LayoutParams(-1, -2)); 
    header.setPadding(0, Utils.dip2px(getActivity(), 15), 0, Utils.dip2px(getActivity(), 10)); 
    header.setPtrFrameLayout(mPtrFrameLayout); 
     
    mPtrFrameLayout.setPinContent(true); 
    mPtrFrameLayout.setLoadingMinTime(100); 
    mPtrFrameLayout.setDurationToCloseHeader(100); 
    mPtrFrameLayout.setHeaderView(header); 
    mPtrFrameLayout.addPtrUIHandler(header); 
    mPtrFrameLayout.setPtrHandler(new PtrHandler() { 
      @Override 
      public boolean checkCanDoRefresh(PtrFrameLayout frame, View content, View header) { 
        return PtrDefaultHandler.checkContentCanBePulledDown(frame, article_listview, header); 
      } 
 
      @Override 
      public void onRefreshBegin(final PtrFrameLayout frame) { 
        pageNum = 1; 
        doRequest(pageNum, true); 
      } 
    }); 

moreView = Finder.inflate(getActivity(), R.layout.loading_more_footer); 
    moreView.setVisibility(View.GONE); 
    article_listview = (ListView) mRootView.findViewById(R.id.article_listview); 
    article_listview.addFooterView(moreView); 
    adapter = new ArticleListAdapter(getActivity()); 
    article_listview.setAdapter(adapter); 
    article_listview.setOnItemClickListener(new OnItemClickListener() { 
 
      @Override 
      public void onItemClick(AdapterView<?> parent, View view, 
          int position, long id) { 
        Article article = (Article) adapter.getItem(position); 
        Intent intent = new Intent(getActivity(), 
            AppBrowserActivity.class); 
        intent.putExtra("w_url", article.getUrl()); 
        intent.putExtra("share_desc", article.getTitle()); 
        intent.putExtra("share_pic", article.getPicUrl()); 
        startActivity(intent); 
      } 
    }); 
    article_listview.setOnScrollListener(new OnScrollListener(){  
      @Override  
      public void onScrollStateChanged(AbsListView view, int scrollState){  
        // 当不滚动时  
        if (scrollState == OnScrollListener.SCROLL_STATE_IDLE) {  
          // 判断是否滚动到底部  
          if (view.getLastVisiblePosition() == view.getCount() - 1) { 
            //加载更多功能的代码  
            moreView.setVisibility(View.VISIBLE); 
            pageNum++; 
            doRequest(pageNum, false); 
          }  
        }  
      } 
 
      @Override 
      public void onScroll(AbsListView view, int firstVisibleItem, 
          int visibleItemCount, int totalItemCount) { 
        // TODO Auto-generated method stub 
         
      }  
    });