Android ListView 下拉刷新 点击加载更多

最近项目中用到了ListView的下拉刷新的功能，总结了一下前辈们的代码，单独抽取出来写了一个demo作为示例。

 

效果图

下拉刷新：

加载更多：

 

CustomListView.java

 

[java] view plaincopy
 
  1. package com.example.uitest.view;  
  2.   
  3. import java.util.Date;  
  4. import com.example.uitest.R;  
  5. import android.content.Context;  
  6. import android.util.AttributeSet;  
  7. import android.util.Log;  
  8. import android.view.LayoutInflater;  
  9. import android.view.MotionEvent;  
  10. import android.view.View;  
  11. import android.view.ViewGroup;  
  12. import android.view.animation.LinearInterpolator;  
  13. import android.view.animation.RotateAnimation;  
  14. import android.widget.AbsListView;  
  15. import android.widget.AbsListView.OnScrollListener;  
  16. import android.widget.BaseAdapter;  
  17. import android.widget.ImageView;  
  18. import android.widget.LinearLayout;  
  19. import android.widget.ListView;  
  20. import android.widget.ProgressBar;  
  21. import android.widget.TextView;  
  22.   
  23. /** 
  24.  * ListView下拉刷新 
  25.  * 
  26.  */  
  27. public class CustomListView extends ListView implements OnScrollListener {  
  28.   
  29.     private final static int RELEASE_To_REFRESH = 0;  
  30.     private final static int PULL_To_REFRESH = 1;  
  31.     private final static int REFRESHING = 2;  
  32.     private final static int DONE = 3;  
  33.     private final static int LOADING = 4;  
  34.   
  35.     // 实际的padding的距离与界面上偏移距离的比例  
  36.     private final static int RATIO = 3;  
  37.   
  38.     private LayoutInflater inflater;  
  39.   
  40.     private LinearLayout headView;  
  41.   
  42.     private TextView tipsTextview;  
  43.     private TextView lastUpdatedTextView;  
  44.     private ImageView arrowImageView;  
  45.     private ProgressBar progressBar;  
  46.   
  47.   
  48.     private RotateAnimation animation;  
  49.     private RotateAnimation reverseAnimation;  
  50.   
  51.     // 用于保证startY的值在一个完整的touch事件中只被记录一次  
  52.     private boolean isRecored;  
  53.   
  54.     private int headContentWidth;  
  55.     private int headContentHeight;  
  56.   
  57.     private int startY;  
  58.     private int firstItemIndex;  
  59.   
  60.     private int state;  
  61.   
  62.     private boolean isBack;  
  63.   
  64.     private OnRefreshListener refreshListener;  
  65.     private OnLoadListener loadListener;  
  66.   
  67.     private boolean isRefreshable;  
  68.       
  69.     private ProgressBar moreProgressBar;  
  70.     private TextView loadMoreView;  
  71.     private View moreView;  
  72.   
  73.     public CustomListView(Context context) {  
  74.         super(context);  
  75.         init(context);  
  76.     }  
  77.   
  78.     public CustomListView(Context context, AttributeSet attrs) {  
  79.         super(context, attrs);  
  80.         init(context);  
  81.     }  
  82.   
  83.     private void init(Context context) {  
  84.         setCacheColorHint(context.getResources().getColor(R.color.transparent));  
  85.         inflater = LayoutInflater.from(context);  
  86.   
  87.         headView = (LinearLayout) inflater.inflate(R.layout.head, null);  
  88.   
  89.         arrowImageView = (ImageView) headView.findViewById(R.id.head_arrowImageView);  
  90.         arrowImageView.setMinimumWidth(70);  
  91.         arrowImageView.setMinimumHeight(50);  
  92.         progressBar = (ProgressBar) headView.findViewById(R.id.head_progressBar);  
  93.         tipsTextview = (TextView) headView.findViewById(R.id.head_tipsTextView);  
  94.         lastUpdatedTextView = (TextView) headView.findViewById(R.id.head_lastUpdatedTextView);  
  95.   
  96.         measureView(headView);  
  97.         headContentHeight = headView.getMeasuredHeight();  
  98.         headContentWidth = headView.getMeasuredWidth();  
  99.   
  100.         headView.setPadding(0, -1 * headContentHeight, 0, 0);  
  101.         headView.invalidate();  
  102.   
  103.         Log.v("size", "width:" + headContentWidth + " height:" + headContentHeight);  
  104.   
  105.         addHeaderView(headView, null, false);  
  106.         setOnScrollListener(this);  
  107.   
  108.         animation = new RotateAnimation(0, -180, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);  
  109.         animation.setInterpolator(new LinearInterpolator());  
  110.         animation.setDuration(250);  
  111.         animation.setFillAfter(true);  
  112.   
  113.         reverseAnimation = new RotateAnimation(-180, 0, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);  
  114.         reverseAnimation.setInterpolator(new LinearInterpolator());  
  115.         reverseAnimation.setDuration(200);  
  116.         reverseAnimation.setFillAfter(true);  
  117.   
  118.         state = DONE;  
  119.         isRefreshable = false;  
  120.           
  121.         moreView = LayoutInflater.from(context).inflate(R.layout.listfooter_more, null);  
  122.         moreView.setVisibility(View.VISIBLE);  
  123.         moreProgressBar = (ProgressBar) moreView.findViewById(R.id.pull_to_refresh_progress);  
  124.         loadMoreView = (TextView) moreView.findViewById(R.id.load_more);  
  125.         moreView.setOnClickListener(new View.OnClickListener() {  
  126.               
  127.             @Override  
  128.             public void onClick(View v) {  
  129.                 onLoad();  
  130.             }  
  131.         });  
  132.         addFooterView(moreView);  
  133.     }  
  134.   
  135.     public void onScroll(AbsListView arg0, int firstVisiableItem, int arg2, int arg3) {  
  136.         firstItemIndex = firstVisiableItem;  
  137.     }  
  138.   
  139.     public void onScrollStateChanged(AbsListView arg0, int arg1) {  
  140.           
  141.     }  
  142.   
  143.     public boolean onTouchEvent(MotionEvent event) {  
  144.   
  145.         if (isRefreshable) {  
  146.             switch (event.getAction()) {  
  147.             case MotionEvent.ACTION_DOWN:  
  148.                 if (firstItemIndex == 0 && !isRecored) {  
  149.                     isRecored = true;  
  150.                     startY = (int) event.getY();  
  151.                 }  
  152.                 break;  
  153.   
  154.             case MotionEvent.ACTION_UP:  
  155.   
  156.                 if (state != REFRESHING && state != LOADING) {  
  157.                     if (state == DONE) {  
  158.                           
  159.                     }  
  160.                     if (state == PULL_To_REFRESH) {  
  161.                         state = DONE;  
  162.                         changeHeaderViewByState();  
  163.                     }  
  164.                     if (state == RELEASE_To_REFRESH) {  
  165.                         state = REFRESHING;  
  166.                         changeHeaderViewByState();  
  167.                         onRefresh();  
  168.                     }  
  169.                 }  
  170.   
  171.                 isRecored = false;  
  172.                 isBack = false;  
  173.   
  174.                 break;  
  175.   
  176.             case MotionEvent.ACTION_MOVE:  
  177.                 int tempY = (int) event.getY();  
  178.   
  179.                 if (!isRecored && firstItemIndex == 0) {  
  180.                     isRecored = true;  
  181.                     startY = tempY;  
  182.                 }  
  183.   
  184.                 if (state != REFRESHING && isRecored && state != LOADING) {  
  185.   
  186.                     // 保证在设置padding的过程中，当前的位置一直是在head，否则如果当列表超出屏幕的话，当在上推的时候，列表会同时进行滚动  
  187.                     // 可以松手去刷新了  
  188.                     if (state == RELEASE_To_REFRESH) {  
  189.   
  190.                         setSelection(0);  
  191.   
  192.                         // 往上推了，推到了屏幕足够掩盖head的程度，但是还没有推到全部掩盖的地步  
  193.                         if (((tempY - startY) / RATIO < headContentHeight) && (tempY - startY) > 0) {  
  194.                             state = PULL_To_REFRESH;  
  195.                             changeHeaderViewByState();  
  196.                         }  
  197.                         // 一下子推到顶了  
  198.                         else if (tempY - startY <= 0) {  
  199.                             state = DONE;  
  200.                             changeHeaderViewByState();  
  201.                         }  
  202.                         // 往下拉了，或者还没有上推到屏幕顶部掩盖head的地步  
  203.                     }  
  204.                     // 还没有到达显示松开刷新的时候,DONE或者是PULL_To_REFRESH状态  
  205.                     if (state == PULL_To_REFRESH) {  
  206.   
  207.                         setSelection(0);  
  208.   
  209.                         // 下拉到可以进入RELEASE_TO_REFRESH的状态  
  210.                         if ((tempY - startY) / RATIO >= headContentHeight) {  
  211.                             state = RELEASE_To_REFRESH;  
  212.                             isBack = true;  
  213.                             changeHeaderViewByState();  
  214.                         }  
  215.                         else if (tempY - startY <= 0) {  
  216.                             state = DONE;  
  217.                             changeHeaderViewByState();  
  218.                         }  
  219.                     }  
  220.   
  221.                     if (state == DONE) {  
  222.                         if (tempY - startY > 0) {  
  223.                             state = PULL_To_REFRESH;  
  224.                             changeHeaderViewByState();  
  225.                         }  
  226.                     }  
  227.   
  228.                     if (state == PULL_To_REFRESH) {  
  229.                         headView.setPadding(0, -1 * headContentHeight + (tempY - startY) / RATIO, 0, 0);  
  230.   
  231.                     }  
  232.   
  233.                     if (state == RELEASE_To_REFRESH) {  
  234.                         headView.setPadding(0, (tempY - startY) / RATIO - headContentHeight, 0, 0);  
  235.                     }  
  236.   
  237.                 }  
  238.   
  239.                 break;  
  240.             }  
  241.         }  
  242.   
  243.         return super.onTouchEvent(event);  
  244.     }  
  245.   
  246.     // 当状态改变时候，调用该方法，以更新界面  
  247.     private void changeHeaderViewByState() {  
  248.         switch (state) {  
  249.         case RELEASE_To_REFRESH:  
  250.             arrowImageView.setVisibility(View.VISIBLE);  
  251.             progressBar.setVisibility(View.GONE);  
  252.             tipsTextview.setVisibility(View.VISIBLE);  
  253.             lastUpdatedTextView.setVisibility(View.VISIBLE);  
  254.   
  255.             arrowImageView.clearAnimation();  
  256.             arrowImageView.startAnimation(animation);  
  257.             tipsTextview.setText("松开刷新");  
  258.   
  259.             break;  
  260.         case PULL_To_REFRESH:  
  261.             progressBar.setVisibility(View.GONE);  
  262.             tipsTextview.setVisibility(View.VISIBLE);  
  263.             lastUpdatedTextView.setVisibility(View.VISIBLE);  
  264.             arrowImageView.clearAnimation();  
  265.             arrowImageView.setVisibility(View.VISIBLE);  
  266.             // 是由RELEASE_To_REFRESH状态转变来的  
  267.             if (isBack) {  
  268.                 isBack = false;  
  269.                 arrowImageView.clearAnimation();  
  270.                 arrowImageView.startAnimation(reverseAnimation);  
  271.   
  272.                 tipsTextview.setText("下拉刷新");  
  273.             } else {  
  274.                 tipsTextview.setText("下拉刷新");  
  275.             }  
  276.             break;  
  277.   
  278.         case REFRESHING:  
  279.             headView.setPadding(0, 0, 0, 0);  
  280.             progressBar.setVisibility(View.VISIBLE);  
  281.             arrowImageView.clearAnimation();  
  282.             arrowImageView.setVisibility(View.GONE);  
  283.             tipsTextview.setText("正在刷新...");  
  284.             lastUpdatedTextView.setVisibility(View.VISIBLE);  
  285.   
  286.             break;  
  287.         case DONE:  
  288.             headView.setPadding(0, -1 * headContentHeight, 0, 0);  
  289.   
  290.             progressBar.setVisibility(View.GONE);  
  291.             arrowImageView.clearAnimation();  
  292.             arrowImageView.setImageResource(R.drawable.arrow);  
  293.             tipsTextview.setText("下拉刷新");  
  294.             lastUpdatedTextView.setVisibility(View.VISIBLE);  
  295.   
  296.             break;  
  297.         }  
  298.     }  
  299.   
  300.     public void setonRefreshListener(OnRefreshListener refreshListener) {  
  301.         this.refreshListener = refreshListener;  
  302.         isRefreshable = true;  
  303.     }  
  304.       
  305.     public void setonLoadListener(OnLoadListener loadListener) {  
  306.         this.loadListener = loadListener;  
  307.     }  
  308.   
  309.     public interface OnRefreshListener {  
  310.         public void onRefresh();  
  311.     }  
  312.       
  313.     public interface OnLoadListener {  
  314.         public void onLoad();  
  315.     }  
  316.   
  317.     @SuppressWarnings("deprecation")  
  318.     public void onRefreshComplete() {  
  319.         state = DONE;  
  320.         lastUpdatedTextView.setText("最近更新:" + new Date().toLocaleString());  
  321.         changeHeaderViewByState();  
  322.     }  
  323.       
  324.     private void onLoad() {  
  325.         if (loadListener != null) {  
  326.             moreProgressBar.setVisibility(View.VISIBLE);  
  327.             loadMoreView.setText(getContext().getString(R.string.load_more));  
  328.             loadListener.onLoad();  
  329.         }  
  330.     }  
  331.       
  332.     public void onLoadComplete() {  
  333. //      moreView.setVisibility(View.GONE);  
  334.         moreProgressBar.setVisibility(View.GONE);  
  335.         loadMoreView.setText(getContext().getString(R.string.more_data));  
  336.     }  
  337.   
  338.     private void onRefresh() {  
  339.         if (refreshListener != null) {  
  340.             refreshListener.onRefresh();  
  341.         }  
  342.     }  
  343.   
  344.     private void measureView(View child) {  
  345.         ViewGroup.LayoutParams p = child.getLayoutParams();  
  346.         if (p == null) {  
  347.             p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);  
  348.         }  
  349.         int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0, p.width);  
  350.         int lpHeight = p.height;  
  351.         int childHeightSpec;  
  352.         if (lpHeight > 0) {  
  353.             childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY);  
  354.         } else {  
  355.             childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);  
  356.         }  
  357.         child.measure(childWidthSpec, childHeightSpec);  
  358.     }  
  359.   
  360.     @SuppressWarnings("deprecation")  
  361.     public void setAdapter(BaseAdapter adapter) {  
  362.         lastUpdatedTextView.setText("最近更新:" + new Date().toLocaleString());  
  363.         super.setAdapter(adapter);  
  364.     }  
  365.   
  366. }  

 

 

在 CustomListView 中有2个回调接口，OnRefreshListener 和 OnLoadListener ，分别对应 下拉和点击加载更多 时候的回调函数。在下拉刷新完成之后要调用 mListView.onRefreshComplete(); 来隐藏掉 头部，调用 mListView.onLoadComplete(); 隐藏掉 底部的加载view。

 

header.xml

 

[html] view plaincopy
 
  1. <?xml version="1.0" encoding="utf-8"?>  
  2. <!-- ListView的头部 -->  
  3.   
  4. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
  5.     android:layout_width="fill_parent"  
  6.     android:layout_height="wrap_content" >  
  7.   
  8.     <!-- 内容 -->  
  9.   
  10.     <RelativeLayout  
  11.         android:id="@+id/head_contentLayout"  
  12.         android:layout_width="fill_parent"  
  13.         android:layout_height="wrap_content"  
  14.         android:paddingLeft="30dp" >  
  15.   
  16.         <!-- 箭头图像、进度条 -->  
  17.   
  18.         <FrameLayout  
  19.             android:layout_width="wrap_content"  
  20.             android:layout_height="wrap_content"  
  21.             android:layout_alignParentLeft="true"  
  22.             android:layout_centerVertical="true" >  
  23.   
  24.             <!-- 箭头 -->  
  25.   
  26.             <ImageView  
  27.                 android:id="@+id/head_arrowImageView"  
  28.                 android:layout_width="wrap_content"  
  29.                 android:layout_height="wrap_content"  
  30.                 android:layout_gravity="center"  
  31.                 android:contentDescription="@string/app_name"  
  32.                 android:src="@drawable/arrow" />  
  33.   
  34.             <!-- 进度条 -->  
  35.   
  36.             <ProgressBar  
  37.                 android:id="@+id/head_progressBar"  
  38.                 style="?android:attr/progressBarStyleSmall"  
  39.                 android:layout_width="wrap_content"  
  40.                 android:layout_height="wrap_content"  
  41.                 android:layout_gravity="center"  
  42.                 android:indeterminateDrawable="@drawable/progressbar_bg"  
  43.                 android:visibility="gone" />  
  44.         </FrameLayout>  
  45.   
  46.         <!-- 提示、最近更新 -->  
  47.   
  48.         <LinearLayout  
  49.             android:layout_width="wrap_content"  
  50.             android:layout_height="wrap_content"  
  51.             android:layout_centerHorizontal="true"  
  52.             android:gravity="center_horizontal"  
  53.             android:orientation="vertical" >  
  54.   
  55.             <!-- 提示 -->  
  56.   
  57.             <TextView  
  58.                 android:id="@+id/head_tipsTextView"  
  59.                 android:layout_width="wrap_content"  
  60.                 android:layout_height="wrap_content"  
  61.                 android:text="@string/pull_to_refresh_pull_label"  
  62.                 android:textColor="@color/pull_refresh_textview"  
  63.                 android:textSize="20sp" />  
  64.   
  65.             <!-- 最近更新 -->  
  66.   
  67.             <TextView  
  68.                 android:id="@+id/head_lastUpdatedTextView"  
  69.                 android:layout_width="wrap_content"  
  70.                 android:layout_height="wrap_content"  
  71.                 android:text="@string/pull_to_refresh_refresh_lasttime"  
  72.                 android:textColor="@color/gold"  
  73.                 android:textSize="10sp" />  
  74.         </LinearLayout>  
  75.     </RelativeLayout>  
  76.   
  77. </LinearLayout>  

 

 


listfooter_more.xml

 

[html] view plaincopy
 
  1. <?xml version="1.0" encoding="utf-8"?>  
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
  3.     android:layout_width="fill_parent"  
  4.     android:layout_height="fill_parent"  
  5.     android:gravity="center_horizontal"  
  6.     android:orientation="horizontal"  
  7.     android:padding="15dp"  
  8.      >  
  9.   
  10.     <ProgressBar  
  11.         android:id="@+id/pull_to_refresh_progress"  
  12.         style="@android:style/Widget.ProgressBar.Small.Inverse"  
  13.         android:layout_width="wrap_content"  
  14.         android:layout_height="wrap_content"  
  15.         android:gravity="center"  
  16.         android:indeterminate="true"  
  17.         android:visibility="gone" >  
  18.     </ProgressBar>  
  19.   
  20.     <TextView  
  21.         android:id="@+id/load_more"  
  22.         android:layout_width="wrap_content"  
  23.         android:layout_height="wrap_content"  
  24.         android:layout_marginLeft="10.0dp"  
  25.         android:gravity="center"  
  26.         android:text="@string/more_data"  
  27.         android:textColor="@color/black" >  
  28.     </TextView>  
  29.   
  30. </LinearLayout>  



 

MainActivity.java

 

[java] view plaincopy
 
  1. package com.example.uitest;  
  2.   
  3. import java.util.ArrayList;  
  4. import java.util.List;  
  5.   
  6. import android.app.Activity;  
  7. import android.content.Context;  
  8. import android.graphics.BitmapFactory;  
  9. import android.os.Bundle;  
  10. import android.os.Handler;  
  11. import android.util.Log;  
  12. import android.view.LayoutInflater;  
  13. import android.view.Menu;  
  14. import android.view.View;  
  15. import android.view.ViewGroup;  
  16. import android.widget.AdapterView;  
  17. import android.widget.AdapterView.OnItemClickListener;  
  18. import android.widget.BaseAdapter;  
  19. import android.widget.ImageView;  
  20. import android.widget.TextView;  
  21.   
  22. import com.example.uitest.model.AppInfo;  
  23. import com.example.uitest.view.CustomListView;  
  24. import com.example.uitest.view.CustomListView.OnLoadListener;  
  25. import com.example.uitest.view.CustomListView.OnRefreshListener;  
  26.   
  27. public class MainActivity extends Activity {  
  28.       
  29.     private static final String TAG = MainActivity.class.getSimpleName();  
  30.   
  31.     private static final int LOAD_DATA_FINISH = 10;  
  32.   
  33.     private static final int REFRESH_DATA_FINISH = 11;  
  34.       
  35.     private List<AppInfo> mList = new ArrayList<AppInfo>();  
  36.     private CustomListAdapter mAdapter;  
  37.     private CustomListView mListView;  
  38.     private int count = 10;  
  39.     private Handler handler = new Handler(){  
  40.         public void handleMessage(android.os.Message msg) {  
  41.             switch (msg.what) {  
  42.             case REFRESH_DATA_FINISH:  
  43.                   
  44.                 if(mAdapter!=null){  
  45.                     mAdapter.notifyDataSetChanged();  
  46.                 }  
  47.                 mListView.onRefreshComplete();  //下拉刷新完成  
  48.                 break;  
  49.             case LOAD_DATA_FINISH:  
  50.                 if(mAdapter!=null){  
  51.                     mAdapter.notifyDataSetChanged();  
  52.                 }  
  53.                 mListView.onLoadComplete(); //加载更多完成  
  54.                 break;  
  55.             default:  
  56.                 break;  
  57.             }  
  58.         };  
  59.     };  
  60.       
  61.     @Override  
  62.     protected void onCreate(Bundle savedInstanceState) {  
  63.         super.onCreate(savedInstanceState);  
  64.         setContentView(R.layout.activity_main);  
  65.           
  66.         buildAppData();  
  67.           
  68.         mAdapter = new CustomListAdapter(this);  
  69.         mListView = (CustomListView) findViewById(R.id.mListView);  
  70.         mListView.setAdapter(mAdapter);  
  71.           
  72.         mListView.setonRefreshListener(new OnRefreshListener() {  
  73.               
  74.             @Override  
  75.             public void onRefresh() {  
  76.                 //TODO 下拉刷新  
  77.                 Log.e(TAG, "onRefresh");  
  78.                 loadData(0);  
  79.             }  
  80.         });  
  81.           
  82.         mListView.setonLoadListener(new OnLoadListener() {  
  83.               
  84.             @Override  
  85.             public void onLoad() {  
  86.                 //TODO 加载更多  
  87.                 Log.e(TAG, "onLoad");  
  88.                 loadData(1);  
  89.             }  
  90.         });  
  91.           
  92.         mListView.setOnItemClickListener(new OnItemClickListener() {  
  93.   
  94.             @Override  
  95.             public void onItemClick(AdapterView<?> parent, View view,  
  96.                     int position, long id) {  
  97.   
  98.                 Log.e(TAG, "click position:" + position);  
  99.   
  100.             }  
  101.   
  102.         });  
  103.     }  
  104.       
  105.     public void loadData(final int type){  
  106.         new Thread(){  
  107.             @Override  
  108.             public void run() {  
  109.                   
  110.                 for(int i=count;i<count+10;i++){  
  111.                     AppInfo ai = new AppInfo();  
  112.   
  113.                     ai.setAppIcon(BitmapFactory.decodeResource(getResources(),  
  114.                             R.drawable.ic_launcher));  
  115.                     ai.setAppName("应用Demo_" + i);  
  116.                     ai.setAppVer("版本: " + (i % 10 + 1) + "." + (i % 8 + 2) + "."  
  117.                             + (i % 6 + 3));  
  118.                     ai.setAppSize("大小: " + i * 10 + "MB");  
  119.   
  120.                     mList.add(ai);  
  121.                 }  
  122.                 count += 10;  
  123.                   
  124.                 try {  
  125.                     Thread.sleep(300);  
  126.                 } catch (InterruptedException e) {  
  127.                     e.printStackTrace();  
  128.                 }  
  129.                   
  130.                 if(type==0){    //下拉刷新  
  131. //                  Collections.reverse(mList); //逆序  
  132.                     handler.sendEmptyMessage(REFRESH_DATA_FINISH);  
  133.                 }else if(type==1){  
  134.                     handler.sendEmptyMessage(LOAD_DATA_FINISH);  
  135.                 }  
  136.                   
  137.             }  
  138.         }.start();  
  139.     }  
  140.       
  141.     /** 
  142.      * 初始化应用数据 
  143.      */  
  144.     private void buildAppData() {  
  145.         for (int i = 0; i < 10; i++) {  
  146.             AppInfo ai = new AppInfo();  
  147.   
  148.             ai.setAppIcon(BitmapFactory.decodeResource(getResources(),  
  149.                     R.drawable.ic_launcher));  
  150.             ai.setAppName("应用Demo_" + i);  
  151.             ai.setAppVer("版本: " + (i % 10 + 1) + "." + (i % 8 + 2) + "."  
  152.                     + (i % 6 + 3));  
  153.             ai.setAppSize("大小: " + i * 10 + "MB");  
  154.   
  155.             mList.add(ai);  
  156.         }  
  157.     }  
  158.   
  159.     @Override  
  160.     public boolean onCreateOptionsMenu(Menu menu) {  
  161.         // Inflate the menu; this adds items to the action bar if it is present.  
  162.         getMenuInflater().inflate(R.menu.main, menu);  
  163.         return true;  
  164.     }  
  165.       
  166.     public class CustomListAdapter extends BaseAdapter {  
  167.   
  168.         private LayoutInflater mInflater;  
  169.   
  170.         public CustomListAdapter(Context context) {  
  171.             mInflater = LayoutInflater.from(context);  
  172.         }  
  173.   
  174.         @Override  
  175.         public int getCount() {  
  176.             return mList.size();  
  177.         }  
  178.   
  179.         @Override  
  180.         public Object getItem(int arg0) {  
  181.             return mList.get(arg0);  
  182.         }  
  183.   
  184.         @Override  
  185.         public long getItemId(int position) {  
  186.             return position;  
  187.         }  
  188.   
  189.         @Override  
  190.         public View getView(int position, View convertView, ViewGroup parent) {  
  191.             if (getCount() == 0) {  
  192.                 return null;  
  193.             }  
  194.   
  195.             ViewHolder holder = null;  
  196.             if (convertView == null) {  
  197.                 convertView = mInflater.inflate(R.layout.list_item, null);  
  198.   
  199.                 holder = new ViewHolder();  
  200.                 holder.ivImage = (ImageView) convertView  
  201.                         .findViewById(R.id.ivIcon);  
  202.                 holder.tvName = (TextView) convertView  
  203.                         .findViewById(R.id.tvName);  
  204.                 holder.tvVer = (TextView) convertView.findViewById(R.id.tvVer);  
  205.                 holder.tvSize = (TextView) convertView  
  206.                         .findViewById(R.id.tvSize);  
  207.                 convertView.setTag(holder);  
  208.             } else {  
  209.                 holder = (ViewHolder) convertView.getTag();  
  210.             }  
  211.   
  212.             AppInfo ai = mList.get(position);  
  213.             holder.ivImage.setImageBitmap(ai.getAppIcon());  
  214.             holder.tvName.setText(ai.getAppName());  
  215.             holder.tvVer.setText(ai.getAppVer());  
  216.             holder.tvSize.setText(ai.getAppSize());  
  217.   
  218.             return convertView;  
  219.         }  
  220.     }  
  221.   
  222.     public static class ViewHolder {  
  223.         private ImageView ivImage;  
  224.         private TextView tvName;  
  225.         private TextView tvVer;  
  226.         private TextView tvSize;  
  227.   
  228.     }  
  229. }  



 

list_item.xml

 

[html] view plaincopy
 
    1. <?xml version="1.0" encoding="utf-8"?>  
    2. <RelativeLayout   
    3.     xmlns:android="http://schemas.android.com/apk/res/android"  
    4.     android:layout_width="match_parent"  
    5.     android:layout_height="wrap_content" >  
    6.   
    7.     <ImageView  
    8.         android:id="@+id/ivIcon"  
    9.         android:layout_width="wrap_content"  
    10.         android:layout_height="wrap_content"  
    11.         android:contentDescription="@string/image_desc"  
    12.         android:src="@drawable/ic_launcher" />  
    13.   
    14.     <LinearLayout  
    15.         android:id="@+id/appInfo"  
    16.         android:layout_width="match_parent"  
    17.         android:layout_height="wrap_content"  
    18.         android:layout_marginLeft="5dip"  
    19.         android:layout_toRightOf="@id/ivIcon"  
    20.         android:orientation="vertical" >  
    21.   
    22.         <TextView  
    23.             android:id="@+id/tvName"  
    24.             android:layout_width="wrap_content"  
    25.             android:layout_height="wrap_content"  
    26.             android:text="@string/name"  
    27.             android:textColor="#000000"  
    28.             android:textSize="16sp" />  
    29.   
    30.         <TextView  
    31.             android:id="@+id/tvVer"  
    32.             android:layout_width="wrap_content"  
    33.             android:layout_height="wrap_content"  
    34.             android:text="@string/ver"  
    35.             android:textColor="#666666"  
    36.             android:textSize="13sp" />  
    37.   
    38.         <TextView  
    39.             android:id="@+id/tvSize"  
    40.             android:layout_width="wrap_content"  
    41.             android:layout_height="wrap_content"  
    42.             android:text="@string/size"  
    43.             android:textColor="#666666"  
    44.             android:textSize="13sp" />  
    45.     </LinearLayout>  
    46.   
    47.     <Button  
    48.         android:id="@+id/btnClick"  
    49.         android:layout_width="80dip"  
    50.         android:layout_height="wrap_content"  
    51.         android:layout_alignParentRight="true"  
    52.         android:layout_centerVertical="true"  
    53.         android:focusable="false"  
    54.         android:text="@string/mgr"  
    55.         android:textColor="#000000"  
    56.         android:textSize="16sp" />  
    57.   
    58. </RelativeLayout>  
posted @ 2015-10-15 22:15  火神漫步  阅读(489)  评论(0)  编辑  收藏  举报