ListView上拉加載下拉重新整理

主要用到了這個幾個檔案，MainActivity是界面的Activity,MyAdapter是ListView的自定義适配,MyListView是自定義帶頭部LIistView，如果隻需要上拉加載就不需要；activity_main.xml是住界面，item.xml是ListView的子布局裡面隻有一個TextView,listview_footer.xml是listview的加載更多的底部布局，listview_header.xml是listview的頭部布局。

MainActivity.java

package com.example.listview;

import java.util.ArrayList;
import java.util.List;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.Toast;

import com.example.listview.MyListView.OnRefreshListener;

public class MainActivity extends Activity implements OnScrollListener{
	/** ListView*/
	private MyListView listView;
	/** 自定義的Adapter*/
	private MyAdapter adapter;
	/** 一共的資料*/
	private List<String> list=new ArrayList<String>();
	/** ListView的底部布局*/
	private View footer;

	private Handler handler;
	 
	private int count=0;
	
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		/** 配置好ListView*/
		listView=(MyListView) findViewById(R.id.listView);

		/** 添加底部布局,要在setAdapter前,否則沒有效果*/
		footer=LayoutInflater.from(this).inflate(R.layout.listview_footer, null);
		listView.addFooterView(footer);
	
		/** 适配listView*/
		adapter=new MyAdapter(this, list);
		listView.setAdapter(adapter);
		
		/**　添加一個線程設定時間有等待的效果*/
		handler=new Handler();

		listView.setOnScrollListener(this);

		listView.setonRefreshListener(new OnRefreshListener() {

	            @Override
	         public void onRefresh() {
	                new AsyncTask<Void, Void, Void>() {
	                    protected Void doInBackground(Void... params) {
	                        try {
	                            Thread.sleep(1000);
	                        } catch (Exception e) {
	                            e.printStackTrace();
	                        }
	                       // list.add("重新整理後添加的内容");
	                        return null;
	                    }

	                    @Override
	                    protected void onPostExecute(Void result) {
	                        adapter.notifyDataSetChanged();
	                        listView.onRefreshComplete();
	                    }
	                }.execute(null, null, null);
	                
	            }
	       });
		 
		setData();  
		
	}

	/**
	 * 底部滾動的監聽 
	 */
	@Override
	public void onScrollStateChanged(final AbsListView view, int scrollState) {
		/** 當滾動停止同時在底部的時候*/
	     if (scrollState == OnScrollListener.SCROLL_STATE_IDLE && (view.getLastVisiblePosition() == view.getCount() - 1)) {
	    		/** 為了有資料加載等待的時間，如果是網絡資料請求，則此處不需要直接請求接口就ok*/
	                handler.postDelayed(new Runnable() {

	                    @Override
	                    public void run() {
	                    	setData();
	                    	/** 讓重新整理出來的資料從螢幕開始顯示,如果不設定位置，listView資料更新後會跑到第一條資料開始顯示*/
	                    	listView.setSelection(view.getCount()-1);
	                    }

	                }, 2000);
	                
	     }
	     
	}
	@Override
	public void onScroll(AbsListView arg0, int arg1, int arg2, int arg3) {
	
	}
	/** 放資料,如果你的資料可以分頁擷取就不需要這樣,此處是為了有分頁的資料*/
	@SuppressLint("ShowToast")
	private void setData(){
		
		//當資料到達總量的時候移除底部布局
		if(count>50){
			
			listView.removeFooterView(footer);
			
			Toast.makeText(this,"沒有更多資料", 500).show();
			
			return;
		}
		
		for(int i=count;i<count+10;i++){
			
			
			list.add("資料"+i);
			
		}
		
		count=count+10;
		/** 通知adapter資料改變*/
		adapter.notifyDataSetChanged();
	}
}

MyListView.java

package com.example.listview;

import java.util.Date;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
/**
 * ListView添加重新整理頭部自定義的ListView
 * 
 * @author 劉梓未
 * 
 *
 */
public class MyListView extends ListView implements OnScrollListener {

    private final static int RELEASE_To_REFRESH = 0;// 下拉過程的狀态值
    private final static int PULL_To_REFRESH = 1; // 從下拉傳回到不重新整理的狀态值
    private final static int REFRESHING = 2;// 正在重新整理的狀态值
    private final static int DONE = 3;
    private final static int LOADING = 4;

    // 實際的padding的距離與界面上偏移距離的比例
    private final static int RATIO = 3;
    private LayoutInflater inflater;

    // ListView頭部下拉重新整理的布局
    private LinearLayout headerView;
    private TextView lvHeaderTipsTv;
    private TextView lvHeaderLastUpdatedTv;
    private ImageView lvHeaderArrowIv;
    private ProgressBar lvHeaderProgressBar;

    // 定義頭部下拉重新整理的布局的高度
    private int headerContentHeight;

    private RotateAnimation animation;
    private RotateAnimation reverseAnimation;

    private int startY;
    private int state;
    private boolean isBack;

    // 用于保證startY的值在一個完整的touch事件中隻被記錄一次
    private boolean isRecored;

    private OnRefreshListener refreshListener;

    private boolean isRefreshable;

    public MyListView(Context context) {
        super(context);
        init(context);
    }

    public MyListView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    private void init(Context context) {
        setCacheColorHint(context.getResources().getColor(android.R.color.transparent));
        inflater = LayoutInflater.from(context);
        headerView = (LinearLayout) inflater.inflate(R.layout.listview_header, null);
        lvHeaderTipsTv = (TextView) headerView
                .findViewById(R.id.lvHeaderTipsTv);
        lvHeaderLastUpdatedTv = (TextView) headerView
                .findViewById(R.id.lvHeaderLastUpdatedTv);

        lvHeaderArrowIv = (ImageView) headerView
                .findViewById(R.id.lvHeaderArrowIv);
        // 設定下拉重新整理圖示的最小高度和寬度
        lvHeaderArrowIv.setMinimumWidth(70);
        lvHeaderArrowIv.setMinimumHeight(50);

        lvHeaderProgressBar = (ProgressBar) headerView
                .findViewById(R.id.lvHeaderProgressBar);
        measureView(headerView);
        headerContentHeight = headerView.getMeasuredHeight();
        // 設定内邊距，正好距離頂部為一個負的整個布局的高度，正好把頭部隐藏
        headerView.setPadding(0, -1 * headerContentHeight, 0, 0);
        // 重繪一下
        headerView.invalidate();
        // 将下拉重新整理的布局加入ListView的頂部
        addHeaderView(headerView, null, false);
        // 設定滾動監聽事件
        setOnScrollListener(this);

        // 設定旋轉動畫事件
        animation = new RotateAnimation(0, -180,
                RotateAnimation.RELATIVE_TO_SELF, 0.5f,
                RotateAnimation.RELATIVE_TO_SELF, 0.5f);
        animation.setInterpolator(new LinearInterpolator());
        animation.setDuration(250);
        animation.setFillAfter(true);

        reverseAnimation = new RotateAnimation(-180, 0,
                RotateAnimation.RELATIVE_TO_SELF, 0.5f,
                RotateAnimation.RELATIVE_TO_SELF, 0.5f);
        reverseAnimation.setInterpolator(new LinearInterpolator());
        reverseAnimation.setDuration(200);
        reverseAnimation.setFillAfter(true);

        // 一開始的狀态就是下拉重新整理完的狀态，是以為DONE
        state = DONE;
        // 是否正在重新整理
        isRefreshable = false;
    }

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {

    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem,
            int visibleItemCount, int totalItemCount) {
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        if (isRefreshable) {
            switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                if (!isRecored) {
                    isRecored = true;
                    startY = (int) ev.getY();// 手指按下時記錄目前位置
                }
                break;
            case MotionEvent.ACTION_UP:
                if (state != REFRESHING && state != LOADING) {
                    if (state == PULL_To_REFRESH) {
                        state = DONE;
                        changeHeaderViewByState();
                    }
                    if (state == RELEASE_To_REFRESH) {
                        state = REFRESHING;
                        changeHeaderViewByState();
                        onLvRefresh();
                    }
                }
                isRecored = false;
                isBack = false;

                break;

            case MotionEvent.ACTION_MOVE:
                int tempY = (int) ev.getY();
                if (!isRecored) {
                    isRecored = true;
                    startY = tempY;
                }
                if (state != REFRESHING && isRecored && state != LOADING) {
                    // 保證在設定padding的過程中，目前的位置一直是在head，否則如果當清單超出螢幕的話，當在上推的時候，清單會同時進行滾動
                    // 可以松手去重新整理了
                    if (state == RELEASE_To_REFRESH) {
                        setSelection(0);
                        // 往上推了，推到了螢幕足夠掩蓋head的程度，但是還沒有推到全部掩蓋的地步
                        if (((tempY - startY) / RATIO < headerContentHeight)// 由松開重新整理狀态轉變到下拉重新整理狀态
                                && (tempY - startY) > 0) {
                            state = PULL_To_REFRESH;
                            changeHeaderViewByState();
                        }
                        // 一下子推到頂了
                        else if (tempY - startY <= 0) {// 由松開重新整理狀态轉變到done狀态
                            state = DONE;
                            changeHeaderViewByState();
                        }
                    }
                    // 還沒有到達顯示松開重新整理的時候,DONE或者是PULL_To_REFRESH狀态
                    if (state == PULL_To_REFRESH) {
                        setSelection(0);
                        // 下拉到可以進入RELEASE_TO_REFRESH的狀态
                        if ((tempY - startY) / RATIO >= headerContentHeight) {// 由done或者下拉重新整理狀态轉變到松開重新整理
                            state = RELEASE_To_REFRESH;
                            isBack = true;
                            changeHeaderViewByState();
                        }
                        // 上推到頂了
                        else if (tempY - startY <= 0) {// 由DOne或者下拉重新整理狀态轉變到done狀态
                            state = DONE;
                            changeHeaderViewByState();
                        }
                    }
                    // done狀态下
                    if (state == DONE) {
                        if (tempY - startY > 0) {
                            state = PULL_To_REFRESH;
                            changeHeaderViewByState();
                        }
                    }
                    // 更新headView的size
                    if (state == PULL_To_REFRESH) {
                        headerView.setPadding(0, -1 * headerContentHeight
                                + (tempY - startY) / RATIO, 0, 0);

                    }
                    // 更新headView的paddingTop
                    if (state == RELEASE_To_REFRESH) {
                        headerView.setPadding(0, (tempY - startY) / RATIO
                                - headerContentHeight, 0, 0);
                    }

                }
                break;

            default:
                break;
            }
        }
        return super.onTouchEvent(ev);
    }

    // 當狀态改變時候，調用該方法，以更新界面
    private void changeHeaderViewByState() {
        switch (state) {
        case RELEASE_To_REFRESH:
            lvHeaderArrowIv.setVisibility(View.VISIBLE);
            lvHeaderProgressBar.setVisibility(View.GONE);
            lvHeaderTipsTv.setVisibility(View.VISIBLE);
            lvHeaderLastUpdatedTv.setVisibility(View.VISIBLE);

            lvHeaderArrowIv.clearAnimation();// 清除動畫
            lvHeaderArrowIv.startAnimation(animation);// 開始動畫效果

            lvHeaderTipsTv.setText("松開重新整理");
            break;
        case PULL_To_REFRESH:
            lvHeaderProgressBar.setVisibility(View.GONE);
            lvHeaderTipsTv.setVisibility(View.VISIBLE);
            lvHeaderLastUpdatedTv.setVisibility(View.VISIBLE);
            lvHeaderArrowIv.clearAnimation();
            lvHeaderArrowIv.setVisibility(View.VISIBLE);
            // 是由RELEASE_To_REFRESH狀态轉變來的
            if (isBack) {
                isBack = false;
                lvHeaderArrowIv.clearAnimation();
                lvHeaderArrowIv.startAnimation(reverseAnimation);

                lvHeaderTipsTv.setText("下拉重新整理");
            } else {
                lvHeaderTipsTv.setText("下拉重新整理");
            }
            break;

        case REFRESHING:

            headerView.setPadding(0, 0, 0, 0);

            lvHeaderProgressBar.setVisibility(View.VISIBLE);
            lvHeaderArrowIv.clearAnimation();
            lvHeaderArrowIv.setVisibility(View.GONE);
            lvHeaderTipsTv.setText("正在重新整理...");
            lvHeaderLastUpdatedTv.setVisibility(View.VISIBLE);
            break;
        case DONE:
            headerView.setPadding(0, -1 * headerContentHeight, 0, 0);

            lvHeaderProgressBar.setVisibility(View.GONE);
            lvHeaderArrowIv.clearAnimation();
            lvHeaderArrowIv.setImageResource(R.drawable.head_arrow);
            lvHeaderTipsTv.setText("下拉重新整理");
            lvHeaderLastUpdatedTv.setVisibility(View.VISIBLE);
            break;
        }
    }

    // 此方法直接照搬自網絡上的一個下拉重新整理的demo，此處是“估計”headView的width以及height
    private void measureView(View child) {
        ViewGroup.LayoutParams params = child.getLayoutParams();
        if (params == null) {
            params = new ViewGroup.LayoutParams(
                    ViewGroup.LayoutParams.MATCH_PARENT,
                    ViewGroup.LayoutParams.WRAP_CONTENT);
        }
        int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0,
                params.width);
        int lpHeight = params.height;
        int childHeightSpec;
        if (lpHeight > 0) {
            childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight,
                    MeasureSpec.EXACTLY);
        } else {
            childHeightSpec = MeasureSpec.makeMeasureSpec(0,
                    MeasureSpec.UNSPECIFIED);
        }
        child.measure(childWidthSpec, childHeightSpec);
    }

    public void setonRefreshListener(OnRefreshListener refreshListener) {
        this.refreshListener = refreshListener;
        isRefreshable = true;
    }

    public interface OnRefreshListener {
        public void onRefresh();
    }

    @SuppressWarnings("deprecation")
	public void onRefreshComplete() {
        state = DONE;
        lvHeaderLastUpdatedTv.setText("最近更新:" + new Date().toLocaleString());
        changeHeaderViewByState();
    }

    private void onLvRefresh() {
        if (refreshListener != null) {
            refreshListener.onRefresh();
        }
    }



}

listview_footer.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:layout_marginTop="10dp"
    android:orientation="horizontal" >

    <ProgressBar 
        android:id="@+id/footer_progress"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />

</LinearLayout>

listview_header.xml

ListView上拉加載下拉重新整理

<?xml version="1.0" encoding="utf-8"?>
<!-- ListView的頭部 -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    >

    <!-- 内容 -->

    <RelativeLayout
        android:id="@+id/head_contentLayout"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/list_header_bg"
        android:paddingLeft="30dp">

        <!-- 箭頭圖像、進度條 -->

        <FrameLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_centerVertical="true" >

            <!-- 箭頭 -->

            <ImageView
                android:id="@+id/lvHeaderArrowIv"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:src="@drawable/head_arrow" />

            <!-- 進度條 -->

            <ProgressBar
                android:id="@+id/lvHeaderProgressBar"
                style="?android:attr/progressBarStyleSmall"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:visibility="gone" />
        </FrameLayout>

        <!-- 提示、最近更新 -->

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true"
            android:gravity="center_horizontal"
            android:orientation="vertical" >

            <!-- 提示 -->

            <TextView
                android:id="@+id/lvHeaderTipsTv"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="下拉重新整理"
                android:textSize="13sp" />

            <!-- 最近更新 -->

            <TextView
                android:id="@+id/lvHeaderLastUpdatedTv"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="最新更新"
                android:textSize="10sp" />
        </LinearLayout>
    </RelativeLayout>

</LinearLayout>

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ListView上拉加載下拉重新整理

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