用過很多上下拉刷新，找到一個讓自己滿意的確實不容易，有些好的刷新控件，也并不是公司所需要的，在這里我給大家推薦一下我所喜歡的上下拉控件，實現也挺簡單，需要的不妨來用一下，效果一看便知
加載就是一個圓形進度條，一個正在加載Textview,我就不上圖了
這個是刷新的頭布局
<?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="最后刷新時間: 2014-10-10 12:56:12" android:textSize="14sp" /> </LinearLayout></LinearLayout>
這個是加載的底部局
<?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="加載更多..." android:textColor="#FF0000" android:textSize="18sp" /> </LinearLayout></LinearLayout>
下面是運行布局嵌套的listview布局，如果使用請換一下包名
<?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文件夾下面創建的一個文件：
<?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>
這個是定義的一個接口，有刷新和加載兩個方法
package jiexinkeji.com.shuaxin;public interface OnRefreshListener { /** * 下拉刷新 */ void onDownPullRefresh(); /** * 上拉加載更多 */ void onLoadingMore();}下面的類是繼承自ListView,來實現下拉刷新上啦加載
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; // 屏幕顯示在第一個的item的索引 private int downY; // 按下時y軸的偏移量 private int headerViewHeight; // 頭布局的高度 private View headerView; // 頭布局的對象 private final int DOWN_PULL_REFRESH = 0; // 下拉刷新狀態 private final int RELEASE_REFRESH = 1; // 松開刷新 private final int REFRESHING = 2; // 正在刷新中 private int currentState = DOWN_PULL_REFRESH; // 頭布局的狀態: 默認為下拉刷新狀態 private Animation upAnimation; // 向上旋轉的動畫 private Animation downAnimation; // 向下旋轉的動畫 private ImageView ivArrow; // 頭布局的剪頭 private ProgressBar mProgressBar; // 頭布局的進度條 private TextView tvState; // 頭布局的狀態 private TextView tvLastUpdateTime; // 頭布局的最后更新時間 private OnRefreshListener mOnRefershListener; private boolean isScrollToBottom; // 是否滑動到底部 private View footerView; // 腳布局的對象 private int footerViewHeight; // 腳布局的高度 private boolean isLoadingMore = false; // 是否正在加載更多中 public RefreshListView(Context context, AttributeSet attrs) { super(context, attrs); initHeaderView(); initFooterView(); this.setOnScrollListener(this); } /** * 初始化腳布局 */ 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); } /** * 初始化頭布局 */ 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); // 設置最后刷新時間 tvLastUpdateTime.setText("最后刷新時間: " + getLastUpdateTime()); headerView.measure(0, 0); // 系統會幫我們測量出headerView的高度 headerViewHeight = headerView.getMeasuredHeight(); headerView.setPadding(0, -headerViewHeight, 0, 0); this.addHeaderView(headerView); // 向ListView的頂部添加一個view對象 initAnimation(); } /** * 獲得系統的最新時間 * * @return */ private String getLastUpdateTime() { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); return sdf.format(System.currentTimeMillis()); } /** * 初始化動畫 */ 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); // 動畫結束后, 停留在結束的位置上 downAnimation = new RotateAnimation(-180f, -360f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); downAnimation.setDuration(500); downAnimation.setFillAfter(true); // 動畫結束后, 停留在結束的位置上 } @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(); // 移動中的y - 按下的y = 間距. int diff = (moveY - downY) / 2; // -頭布局的高度 + 間距 = paddingTop int paddingTop = -headerViewHeight + diff; // 如果: -頭布局的高度 > paddingTop的值 執行super.onTouchEvent(ev); if (firstVisibleItemPosition == 0 && -headerViewHeight < paddingTop) { if (paddingTop > 0 && currentState == DOWN_PULL_REFRESH) { // 完全顯示了. Log.i(TAG, "松開刷新"); currentState = RELEASE_REFRESH; refreshHeaderView(); } else if (paddingTop < 0 && currentState == RELEASE_REFRESH) { // 沒有顯示完全 Log.i(TAG, "下拉刷新"); currentState = DOWN_PULL_REFRESH; refreshHeaderView(); } // 下拉頭布局 headerView.setPadding(0, paddingTop, 0, 0); return true; } break; case MotionEvent.ACTION_UP : // 判斷當前的狀態是松開刷新還是下拉刷新 if (currentState == RELEASE_REFRESH) { Log.i(TAG, "刷新數據."); // 把頭布局設置為完全顯示狀態 headerView.setPadding(0, 0, 0, 0); // 進入到正在刷新中狀態 currentState = REFRESHING; refreshHeaderView(); if (mOnRefershListener != null) { mOnRefershListener.onDownPullRefresh(); // 調用使用者的監聽方法 } } else if (currentState == DOWN_PULL_REFRESH) { // 隱藏頭布局 headerView.setPadding(0, -headerViewHeight, 0, 0); } break; default : break; } return super.onTouchEvent(ev); } /** * 根據currentState刷新頭布局的狀態 */ private void refreshHeaderView() { switch (currentState) { case DOWN_PULL_REFRESH : // 下拉刷新狀態 tvState.setText("下拉刷新"); ivArrow.startAnimation(downAnimation); // 執行向下旋轉 break; case RELEASE_REFRESH : // 松開刷新狀態 tvState.setText("松開刷新"); ivArrow.startAnimation(upAnimation); // 執行向上旋轉 break; case REFRESHING : // 正在刷新中狀態 ivArrow.clearAnimation(); ivArrow.setVisibility(View.GONE); mProgressBar.setVisibility(View.VISIBLE); tvState.setText("正在刷新中..."); break; default : break; } } /** * 當滾動狀態改變時回調 */ @Override public void onScrollStateChanged(AbsListView view, int scrollState) { if (scrollState == SCROLL_STATE_IDLE || scrollState == SCROLL_STATE_FLING) { // 判斷當前是否已經到了底部 if (isScrollToBottom && !isLoadingMore) { isLoadingMore = true; // 當前到底部 Log.i(TAG, "加載更多數據"); footerView.setPadding(0, 0, 0, 0); this.setSelection(this.getCount()); if (mOnRefershListener != null) { mOnRefershListener.onLoadingMore(); } } } } /** * 當滾動時調用 * * @param firstVisibleItem * 當前屏幕顯示在頂部的item的position * @param visibleItemCount * 當前屏幕顯示了多少個條目的總數 * @param totalItemCount * ListView的總條目的總數 */ @Override public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { firstVisibleItemPosition = firstVisibleItem; if (getLastVisiblePosition() == (totalItemCount - 1)) { isScrollToBottom = true; } else { isScrollToBottom = false; } } /** * 設置刷新監聽事件 * * @param listener */ public void setOnRefreshListener(OnRefreshListener listener) { mOnRefershListener = listener; } /** * 隱藏頭布局 */ 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("最后刷新時間: " + getLastUpdateTime()); currentState = DOWN_PULL_REFRESH; } /** * 隱藏腳布局 */ public void hideFooterView() { footerView.setPadding(0, -footerViewHeight, 0, 0); isLoadingMore = false; }}接下來再運行主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("這是一條ListView的數據" + 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, "這是下拉刷新出來的數據" + 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("這是加載更多出來的數據1"); textList.add("這是加載更多出來的數據2"); textList.add("這是加載更多出來的數據3"); return null; } @Override protected void onPostExecute(Void result) { adapter.notifyDataSetChanged(); // 控制腳布局隱藏 rListView.hideFooterView(); } }.execute(new Void[]{}); }}以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VEVB武林網。
新聞熱點
疑難解答
