Android带刷新时间显示的PullToRefresh上下拉刷新_android教程

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Android带刷新时间显示的PullToRefresh上下拉刷新

发布时间：2019-08-08 发布网站：脚本宝典

脚本宝典收集整理的这篇文章主要介绍了Android带刷新时间显示的PullToRefresh上下拉刷新，脚本宝典觉得挺不错的，现在分享给大家，也给大家做个参考。

用过很多上下拉刷新，找到一个让自己满意的确实不容易，有些好的刷新控件，也并不是公司所需要的，在这里我给大家推荐一下我所喜欢的上下拉控件，实现也挺简单，需要的不妨来用一下，效果一看便知

Android带刷新时间显示的PullToRefresh上下拉刷新

加载就是一个圆形进度条，一个正在加载Textview,我就不上图了

这个是刷新的头布局

 <?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="wrap_content"  android:orientation="horizontal" >   <FrameLayout  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_margin="10dip" >   <ImageView   android:id="@+id/iv_listview_header_arrow"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_gravity="center"   android:minWidth="30dip"   android:src="@mipmap/ic_launcher" />   <ProgressBar   android:id="@+id/pb_listview_header"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_gravity="center"   android:indeterminateDrawable="@drawable/common_progressbar"   android:visibility="gone" />  </FrameLayout>   <LinearLayout  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:layout_gravity="center_vertical"  android:gravity="center_horizontal"  android:orientation="vertical" >   <TextView   android:id="@+id/tv_listview_header_state"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="下拉刷新"   android:textColor="#FF0000"   android:textSize="18sp" />   <TextView   android:id="@+id/tv_listview_header_last_update_time"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_marginTop="5dip"   android:text="最后刷新时间: 2014-10-10 12:56:12"   android:textSize="14sp" />  </LinearLayout>  </LinearLayout>

这个是加载的底部局

 <?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="wrap_content"  android:orientation="vertical" >   <LinearLayout  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_gravity="center_horizontal"  android:layout_margin="10dip"  android:gravity="center_vertical"  android:orientation="horizontal" >   <ProgressBar   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_gravity="center"   android:indeterminateDrawable="@drawable/common_progressbar" />   <TextView   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_marginLeft="10dip"   android:text="加载更多..."   android:textColor="#FF0000"   android:textSize="18sp" />  </LinearLayout>  </LinearLayout>

下面是运行布局嵌套的listview布局，如果使用请换一下包名

 <?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:app="http://schemas.android.com/apk/res-auto"  xmlns:tools="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  tools:context="jiexinkeji.com.shuaxin.MainActivity">  <jiexinkeji.com.shuaxin.RefreshListView  android:id="@+id/refreshlistview"  android:layout_width="match_parent"  android:layout_height="match_parent"></jiexinkeji.com.shuaxin.RefreshListView>  </android.support.constraint.ConstraintLayout>

下面是在drawable文件夹下面创建的一个文件：

 <?xml version="1.0" encoding="utf-8"?> <rotate xmlns:android="http://schemas.android.com/apk/res/android"  android:fromDegrees="0"  android:pivotX="50%"  android:pivotY="50%"  android:toDegrees="360" >   <shape  android:innerRadiusRatio="3"  android:shape="ring"  android:useLevel="false" >  <gradient   android:centerColor="#FF6666"   android:endColor="#FF0000"   android:startColor="#FFFFFF"   android:type="sweep" />  </shape>  </rotate>

这个是定义的一个接口，有刷新和加载两个方法

 package jiexinkeji.com.shuaxin;  public interface OnRefreshListener {   /**  * 下拉刷新  */  void onDownPullRefresh();   /**  * 上拉加载更多  */  void onLoadingMore(); }

下面的类是继承自ListView,来实现下拉刷新上啦加载

 package jiexinkeji.com.shuaxin;  import android.content.Context; import android.support.v4.widget.SwipeRefreshLayout; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.animation.Animation; import android.view.animation.RotateAnimation; import android.widget.AbsListView; import android.widget.ImageView; import android.widget.ListView; import android.widget.ProgressBar; import android.widget.TextView;  import java.text.SimpleDateFormat;  public class RefreshListView extends ListView implements AbsListView.OnScrollListener {   private static final String TAG = "RefreshListView";  private int firstVisibleItemPosition; // 屏幕显示在第一个的item的索引  private int downY; // 按下时y轴的偏移量  private int headerViewHeight; // 头布局的高度  private View headerView; // 头布局的对象   private final int DOWN_PULL_REFRESH = 0; // 下拉刷新状态  private final int RELEASE_REFRESH = 1; // 松开刷新  private final int REFRESHING = 2; // 正在刷新中  private int currentState = DOWN_PULL_REFRESH; // 头布局的状态: 默认为下拉刷新状态   private Animation upAnimation; // 向上旋转的动画  private Animation downAnimation; // 向下旋转的动画   private ImageView ivArrow; // 头布局的剪头  private ProgressBar mProgressBar; // 头布局的进度条  private TextView tvState; // 头布局的状态  private TextView tvLastUpdateTime; // 头布局的最后更新时间   private OnRefreshListener mOnRefershListener;  private boolean isScrollToBottom; // 是否滑动到底部  private View footerView; // 脚布局的对象  private int footerViewHeight; // 脚布局的高度  private boolean isLoadingMore = false; // 是否正在加载更多中   public RefreshListView(Context context, AttributeSet attrs) {  super(context, attrs);  initHeaderView();  initFooterView();  this.setOnScrollListener(this);  }   /**  * 初始化脚布局  */  private void initFooterView() {  footerView = View.inflate(getContext(), R.layout.listview_footer, null);  footerView.measure(0, 0);  footerViewHeight = footerView.getMeasuredHeight();  footerView.setPadding(0, -footerViewHeight, 0, 0);  this.addFooterView(footerView);  }   /**  * 初始化头布局  */  private void initHeaderView() {  headerView = View.inflate(getContext(), R.layout.listview_header, null);  ivArrow = (ImageView) headerView   .findViewById(R.id.iv_listview_header_arrow);  mProgressBar = (ProgressBar) headerView   .findViewById(R.id.pb_listview_header);  tvState = (TextView) headerView   .findViewById(R.id.tv_listview_header_state);  tvLastUpdateTime = (TextView) headerView   .findViewById(R.id.tv_listview_header_last_update_time);   // 设置最后刷新时间  tvLastUpdateTime.setText("最后刷新时间: " + getLastUpdateTime());   headerView.measure(0, 0); // 系统会帮我们测量出headerView的高度  headerViewHeight = headerView.getMeasuredHeight();  headerView.setPadding(0, -headerViewHeight, 0, 0);  this.addHeaderView(headerView); // 向ListView的顶部添加一个view对象  initAnimation();  }   /**  * 获得系统的最新时间  *  * @return  */  private String getLastUpdateTime() {  SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  return sdf.format(System.currentTimeMillis());  }   /**  * 初始化动画  */  private void initAnimation() {  upAnimation = new RotateAnimation(0f, -180f,   Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,   0.5f);  upAnimation.setDuration(500);  upAnimation.setFillAfter(true); // 动画结束后, 停留在结束的位置上   downAnimation = new RotateAnimation(-180f, -360f,   Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,   0.5f);  downAnimation.setDuration(500);  downAnimation.setFillAfter(true); // 动画结束后, 停留在结束的位置上  }   @Override  public boolean onTouchEvent(MotionEvent ev) {  switch (ev.getAction()) {   case MotionEvent.ACTION_DOWN :   downY = (int) ev.getY();   break;   case MotionEvent.ACTION_MOVE :   int moveY = (int) ev.getY();   // 移动中的y - 按下的y = 间距.   int diff = (moveY - downY) / 2;   // -头布局的高度 + 间距 = paddingTop   int paddingTop = -headerViewHeight + diff;   // 如果: -头布局的高度 > paddingTop的值 执行super.onTouchEvent(ev);   if (firstVisibleItemPosition == 0    && -headerViewHeight < paddingTop) {    if (paddingTop > 0 && currentState == DOWN_PULL_REFRESH) { // 完全显示了.    Log.i(TAG, "松开刷新");    currentState = RELEASE_REFRESH;    refreshHeaderView();    } else if (paddingTop < 0     && currentState == RELEASE_REFRESH) { // 没有显示完全    Log.i(TAG, "下拉刷新");    currentState = DOWN_PULL_REFRESH;    refreshHeaderView();    }    // 下拉头布局    headerView.setPadding(0, paddingTop, 0, 0);    return true;   }   break;   case MotionEvent.ACTION_UP :   // 判断当前的状态是松开刷新还是下拉刷新   if (currentState == RELEASE_REFRESH) {    Log.i(TAG, "刷新数据.");    // 把头布局设置为完全显示状态    headerView.setPadding(0, 0, 0, 0);    // 进入到正在刷新中状态    currentState = REFRESHING;    refreshHeaderView();     if (mOnRefershListener != null) {    mOnRefershListener.onDownPullRefresh(); // 调用使用者的监听方法    }   } else if (currentState == DOWN_PULL_REFRESH) {    // 隐藏头布局    headerView.setPadding(0, -headerViewHeight, 0, 0);   }   break;   default :   break;  }  return super.onTouchEvent(ev);  }   /**  * 根据currentState刷新头布局的状态  */  private void refreshHeaderView() {  switch (currentState) {   case DOWN_PULL_REFRESH : // 下拉刷新状态   tvState.setText("下拉刷新");   ivArrow.startAnimation(downAnimation); // 执行向下旋转   break;   case RELEASE_REFRESH : // 松开刷新状态   tvState.setText("松开刷新");   ivArrow.startAnimation(upAnimation); // 执行向上旋转   break;   case REFRESHING : // 正在刷新中状态   ivArrow.clearAnimation();   ivArrow.setVisibility(View.GONE);   mProgressBar.setVisibility(View.VISIBLE);   tvState.setText("正在刷新中...");   break;   default :   break;  }  }   /**  * 当滚动状态改变时回调  */  @Override  public void onScrollStateChanged(AbsListView view, int scrollState) {   if (scrollState == SCROLL_STATE_IDLE   || scrollState == SCROLL_STATE_FLING) {   // 判断当前是否已经到了底部   if (isScrollToBottom && !isLoadingMore) {   isLoadingMore = true;   // 当前到底部   Log.i(TAG, "加载更多数据");   footerView.setPadding(0, 0, 0, 0);   this.setSelection(this.getCount());    if (mOnRefershListener != null) {    mOnRefershListener.onLoadingMore();   }   }  }  }   /**  * 当滚动时调用  *  * @param firstVisibleItem  *  当前屏幕显示在顶部的item的position  * @param visibleItemCount  *  当前屏幕显示了多少个条目的总数  * @param totalItemCount  *  ListView的总条目的总数  */  @Override  public void onScroll(AbsListView view, int firstVisibleItem,     int visibleItemCount, int totalItemCount) {  firstVisibleItemPosition = firstVisibleItem;   if (getLastVisiblePosition() == (totalItemCount - 1)) {   isScrollToBottom = true;  } else {   isScrollToBottom = false;  }  }   /**  * 设置刷新监听事件  *  * @param listener  */  public void setOnRefreshListener(OnRefreshListener listener) {  mOnRefershListener = listener;  }   /**  * 隐藏头布局  */  public void hideHeaderView() {  headerView.setPadding(0, -headerViewHeight, 0, 0);  ivArrow.setVisibility(View.VISIBLE);  mProgressBar.setVisibility(View.GONE);  tvState.setText("下拉刷新");  tvLastUpdateTime.setText("最后刷新时间: " + getLastUpdateTime());  currentState = DOWN_PULL_REFRESH;  }   /**  * 隐藏脚布局  */  public void hideFooterView() {  footerView.setPadding(0, -footerViewHeight, 0, 0);  isLoadingMore = false;  } }

接下来再运行主Activity使用就行了

 package jiexinkeji.com.shuaxin;  import android.app.Activity; import android.graphics.Color; import android.os.AsyncTask; import android.os.Bundle; import android.os.SystemClock; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.TextView;  import java.util.ArrayList; import java.util.List;  public class MainActivity extends Activity implements OnRefreshListener {   private List<String> textList;  private MyAdapter adapter;  private RefreshListView rListView;   @Override  protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);   rListView = (RefreshListView) findViewById(R.id.refreshlistview);  textList = new ArrayList<String>();  for (int i = 0; i < 25; i++) {   textList.add("这是一条ListView的数据" + i);  }  adapter = new MyAdapter();  rListView.setAdapter(adapter);  rListView.setOnRefreshListener(this);  }   private class MyAdapter extends BaseAdapter {   @Override  public int getCount() {   // TODO Auto-generated method stub   return textList.size();  }   @Override  public Object getItem(int position) {   // TODO Auto-generated method stub   return textList.get(position);  }   @Override  public long getItemId(int position) {   // TODO Auto-generated method stub   return position;  }   @Override  public View getView(int position, View convertView, ViewGroup parent) {   // TODO Auto-generated method stub   TextView textView = new TextView(MainActivity.this);   textView.setText(textList.get(position));   textView.setTextSize(18.0f);   return textView;  }   }   @Override  public void onDownPullRefresh() {  new AsyncTask<Void, Void, Void>() {    @Override   protected Void doInBackground(Void... params) {   SystemClock.sleep(2000);   for (int i = 0; i < 2; i++) {    textList.add(0, "这是下拉刷新出来的数据" + i);   }   return null;   }    @Override   protected void onPostExecute(Void result) {   adapter.notifyDataSetChanged();   rListView.hideHeaderView();   }  }.execute(new Void[]{});  }   @Override  public void onLoadingMore() {  new AsyncTask<Void, Void, Void>() {    @Override   protected Void doInBackground(Void... params) {   SystemClock.sleep(5000);    textList.add("这是加载更多出来的数据1");   textList.add("这是加载更多出来的数据2");   textList.add("这是加载更多出来的数据3");   return null;   }    @Override   protected void onPostExecute(Void result) {   adapter.notifyDataSetChanged();    // 控制脚布局隐藏   rListView.hideFooterView();   }  }.execute(new Void[]{});  }  }

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