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定制SwipeRefreshLayout

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定制SwipeRefreshLayoutSwipeRefreshLayout大家都用过，google推出的，亲生儿子，兼容性自然最好！可是SwipeRefreshLayout只支持下拉刷新，没有上拉加载更多，这样是没办法满足我们的需要的，所以本文就对它进行一下定制，加上下拉刷新。首先贴用法：xml:

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SwipeRefreshLayout大家都用过，google推出的，亲生儿子，兼容性自然最好！可是SwipeRefreshLayout只支持下拉刷新，没有上拉加载更多，这样是没办法满足我们的需要的，所以本文就对它进行一下定制，加上下拉刷新。

首先贴用法：

xml:

<?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="#ffccee"
    android:orientation="vertical" >

    <com.utilslibrary.widget.SuperSwipeLayout
        android:id="@+id/swipeRefreshLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <ListView
            android:id="@+id/listView"
            android:layout_width="match_parent"
            android:layout_height="match_parent" >
        </ListView>
    </com.utilslibrary.widget.SuperSwipeLayout>

</LinearLayout>

Activity 里面只需要这样设置即可： 

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.widget.SwipeRefreshLayout;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.utilslibrary.widget.SuperSwipeLayout;

import java.util.ArrayList;
public class SwipeRefreshLayoutActivity extends Activity {
    private SuperSwipeLayout swipeRefreshLayout;
    private ArrayList<String> data = new ArrayList<String>();
    private ArrayAdapter<String> adapter;
    int loadNum;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_swipe_refresh_layout);

        adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, data);

        swipeRefreshLayout = (SuperSwipeLayout) findViewById(R.id.swipeRefreshLayout);
        ListView listView = (ListView) findViewById(R.id.listView);

        //下拉刷新监听
        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            // SwipeRefreshLayout接管其包裹的ListView下拉事件。
            // 每一次对ListView的下拉动作，将触发SwipeRefreshLayout的onRefresh()。
            @Override
            public void onRefresh() {
                System.out.println("======fresh...");
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        adapter.clear();
                        for(int i = 0; i < 20; i ++){
                            adapter.add(i + "");
                        }
                        swipeRefreshLayout.stopFreshing(false);
                        loadNum = 0;
                    }
                }, 3500);
            }
        });

        //加载更多的监听
        swipeRefreshLayout.setOnReLoadListener(new SuperSwipeLayout.OnReLoadListener() {
            @Override
            public void onLoad() {
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        for(int i = 0; i < 10; i ++){
                            data.add("loadMore: " + loadNum + " - " + i);
                        }
                        //一页的更多加载完了
                        swipeRefreshLayout.stopReLoad();
                        adapter.notifyDataSetChanged();
                        loadNum++;

                        if(loadNum >= 3){
                            //没有更多了
                            swipeRefreshLayout.ReLoadComplete();
                        }
                    }
                }, 1500);
            }
        });

        listView.setAdapter(adapter);
        swipeRefreshLayout.startRefresh();
    }
}








//看到没？用法是不是超简单？哈哈～下面看实现：






import android.content.Context;
import android.database.DataSetObserver;
import android.graphics.drawable.AnimationDrawable;
import android.support.v4.widget.SwipeRefreshLayout;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.widget.AbsListView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

import com.utilslibrary.R;


/**
 * 定制SwipeRefreshLayout实现自动刷新，加载更多
 * Created by sam on 17/2/22.
 */
public class SuperSwipeLayout extends SwipeRefreshLayout {
    public static final int PULL_STATUS_NOMAL = 0;//正常狀態
    public static final int PULL_STATUS_REFRESHING = 1;//正在刷新
    public static final int PULL_STATUS_LOADMORE = 2;//正在加载更多
    public static final int PULL_STATUS_LOADMORE_STOP = 3;//已经加载完更多
    Context mContext;
    ListView mListView;
    OnReLoadListener mOnReLoadListener;
    View mFooterView;
    View mLoreMoreView;//加载更多的view
    LinearLayout mFooterLayout;//整个footer的布局
    LinearLayout mFooterLayoutGroup;//自定义footerView的父布局
    SwipeRefreshLayout.OnRefreshListener mOnRefreshListener;
    TextView mLoadMoreTextView;
    ImageView mLoadMoreImage;
    private int mStatus;
    String mReLoadingText, mNoMoreText;

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

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

    /**
     * 初始化样式
     */
    private void initRefreshStyle(){
        //加载颜色是循环播放的，只要没有完成刷新就会一直循环
        setColorSchemeResources(
                android.R.color.holo_blue_bright,
                android.R.color.holo_orange_light,
                android.R.color.holo_green_light,
                android.R.color.holo_red_light,
                android.R.color.holo_purple
        );
    }

    private void initLoadTextRes(){
        mReLoadingText = "正在加载更多...";
        mNoMoreText = "没有更多了～";
    }

    public ListView getListView(){
        return mListView;
    }

    private void init(Context context) {
        this.mContext = context;
        initRefreshStyle();
        initLoadTextRes();

        mLoreMoreView = createLoadView(context);
        mLoadMoreTextView = (TextView) mLoreMoreView.findViewWithTag("tv_loadmoer");
        mLoadMoreImage = (ImageView) mLoreMoreView.findViewWithTag("image_loading");
        mLoreMoreView.setVisibility(View.GONE);
        AnimationDrawable anim = (AnimationDrawable) mLoadMoreImage.getBackground();
        anim.start();

        mFooterLayoutGroup = new LinearLayout(mContext);
        mFooterLayoutGroup.setOrientation(LinearLayout.VERTICAL);

        mFooterLayout = new LinearLayout(mContext);
        mFooterLayout.setOrientation(LinearLayout.VERTICAL);

        LinearLayout.LayoutParams footerParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
                dipToPixels(context, 45));
        footerParams.gravity = Gravity.CENTER;

        mFooterLayout.addView(mFooterLayoutGroup);//外部添加的footerView
        mFooterLayout.addView(mLoreMoreView, footerParams);//加载更多view

        mListView = new ListView(context);
        mListView.addFooterView(mFooterLayout);
        addView(mListView, new ViewGroup.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

        mListView.setOnScrollListener(new AbsListView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(AbsListView view, int scrollState) {
                if (mStatus == PULL_STATUS_LOADMORE_STOP) {
                    return;
                }
                // 当不滚动时
                if (mStatus != PULL_STATUS_LOADMORE
                        && scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE) {
                    // 判断是否滚动到底部
                    if (view.getLastVisiblePosition() == view.getCount() - 1) {
                        if (null != mListView && mListView.getFooterViewsCount() == 0) {
                            mLoreMoreView.setVisibility(View.INVISIBLE);
                            return;
                        }

                        //加载更多佈局的代码
                        mOnReLoadListener.onLoad();
                        setStatus(PULL_STATUS_LOADMORE);
                    }
                }
            }

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

        getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                //这里要减去footerview
                //
                int defaultViewCount = mListView.getHeaderViewsCount() + mListView.getFooterViewsCount();

                if (null != mOnReLoadListener && mListView.getCount() > defaultViewCount) {
                    mLoreMoreView.setVisibility(View.VISIBLE);
                    System.out.println("===onGlobalLayout " + mListView.getCount());
                    return;
                }
            }
        });
    }

    private View createLoadView(Context context){
        LinearLayout layout = new LinearLayout(context);
        layout.setOrientation(LinearLayout.HORIZONTAL);

        ImageView imageView = new ImageView(context);
        imageView.setTag("image_loading");

        TextView textView = new TextView(context);
        textView.setTag("tv_loadmoer");

        LinearLayout.LayoutParams imageParams = new LinearLayout.LayoutParams(dipToPixels(context, 40),
                dipToPixels(context, 40));
        imageParams.gravity = Gravity.CENTER;
        imageView.setBackgroundResource(R.drawable.progressbar);
        layout.addView(imageView, imageParams);

        LinearLayout.LayoutParams textParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
                LayoutParams.WRAP_CONTENT);
        textParams.gravity = Gravity.CENTER;
        layout.addView(textView, textParams);
        return layout;
    }

    private int dipToPixels(Context context, float dip){
        return (int)(context.getResources().getDisplayMetrics().density * dip);
    }

    private void setStatus(int status){
        mStatus = status;

        switch (status){
            case PULL_STATUS_NOMAL:
                mLoadMoreTextView.setText(mReLoadingText);
                break;
            case PULL_STATUS_LOADMORE:
                mLoreMoreView.setVisibility(View.VISIBLE);
                mLoadMoreImage.setVisibility(View.VISIBLE);
                mLoadMoreTextView.setText(mReLoadingText);
                break;
            case PULL_STATUS_LOADMORE_STOP:
                mLoadMoreTextView.setText(mNoMoreText);
                mLoadMoreImage.setVisibility(View.GONE);
                break;
            case PULL_STATUS_REFRESHING:

                break;
        }
    }

    /**
     * 更多加载完成
     */
    public void stopReLoad(){
        setStatus(PULL_STATUS_NOMAL);
    }

    /**
     * 没有更多了～
     */
    public void ReLoadComplete(){
        setStatus(PULL_STATUS_LOADMORE_STOP);
    }

    /**
     * 这里说一下，一般listview加载更多是没有footerview的，
     * 但我这样把它加进去了，mFooterLayout是整个footerview的容器，是线性布局的，当然你也可以改
     * 加载更多的view会拼在addFooterView这个传进来的view下面
     * @param footerView
     */
    public void addFooterView(View footerView){
        if(null == mFooterLayoutGroup || mFooterLayoutGroup.getChildCount() > 0){
            return;
        }

        mFooterLayoutGroup.addView(footerView,
                new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
    }

    public void removeFooterView(){
        if(null != mFooterLayoutGroup && mFooterLayoutGroup.getChildCount() > 0){
            mFooterLayoutGroup.removeAllViews();
        }
    }

    /**
     * 自动刷新
     */
    public void startRefresh(){
        this.post(new Runnable() {

            @Override
            public void run() {
                setStatus(PULL_STATUS_REFRESHING);
                setRefreshing(true);
                mOnRefreshListener.onRefresh();
            }
        });
    }

    public void stopFreshing(boolean fresh){
        if(fresh){
            setStatus(PULL_STATUS_REFRESHING);
        }else{
            setStatus(PULL_STATUS_NOMAL);
        }
        super.setRefreshing(fresh);
    }

    public void setOnRefreshListener(SwipeRefreshLayout.OnRefreshListener listener){
        mOnRefreshListener = listener;
        super.setOnRefreshListener(mOnRefreshListener);
    }

    public void setOnReLoadListener(OnReLoadListener listener){
        this.mOnReLoadListener = listener;
    }

    public interface OnReLoadListener{
        public void onLoad();
    }

}








 
 



                                                        
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