前言

本次demo的編輯環境為android studio，java1.8

截圖

使用

1.本示例依賴jar如下：

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile 'de.greenrobot:eventbus:2.4.0'
    compile('in.srain.cube:ultra-ptr:[email protected]') {
        exclude group: 'in.srain.cube', module: 'clog'
    }
    compile('in.srain.cube:cube-sdk:
 
[email protected]') {
        exclude group: 'in.srain.cube', module: 'clog'
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="loadmore.example.jan.org.loadmoredemo.MainActivity">

    <in.srain.cube.views.ptr.PtrClassicFrameLayout
        android:id="@+id/load_more_list_view_ptr_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <in.srain.cube.views.loadmore.LoadMoreListViewContainer
            android:id="@+id/load_more_list_view_container"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@color/cube_mints_white">

            <ListView
                android:id="@+id/load_more_listview"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:divider="@null"
                android:fadingEdge="none"
                android:listSelector="@android:color/transparent"
                android:paddingLeft="12dp"
                android:paddingRight="12dp"
                android:scrollbarStyle="outsideOverlay" />
        </in.srain.cube.views.loadmore.LoadMoreListViewContainer>
    </in.srain.cube.views.ptr.PtrClassicFrameLayout>
</RelativeLayout>
 

PtrClassicFrameLayout 是一個可以起到下拉重新整理的實現的父類佈局，而LoadMoreListViewContainer則是載入更多的佈局控制元件。

3.MainActivity.java demo主要的程式碼實現，步驟和說明已註釋

/**
 * 利用android-Ultra-Pull-To-Refresh，上拉重新整理和上拉載入的簡單的dome
 */
public class MainActivity extends AppCompatActivity {
    private PtrFrameLayout mPtrFrameLayout;
    private LoadMoreListViewContainer mLoadMoreListViewContainer;
    private ListView mListView;

    private List<String> mockStrList = new ArrayList<>();
    private int start = 0;
    private int count = 15;
    private PagedListViewDataAdapter<String> mAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //1.find the listview
        mListView = (ListView) findViewById(R.id.load_more_listview);
        // 為listview的建立一個headerview,注意，如果不加會影響到載入的footview的顯示！
        View headerMarginView = new View(this);
        headerMarginView.setLayoutParams(new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, LocalDisplay.dp2px(20)));
        mListView.addHeaderView(headerMarginView);
        //2.繫結模擬的資料
        final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mockStrList);
        mListView.setAdapter(adapter);
        //3.設定下拉重新整理元件和事件監聽
        mPtrFrameLayout = (PtrFrameLayout) findViewById(R.id.load_more_list_view_ptr_frame);
        mPtrFrameLayout.setLoadingMinTime(1000);
        mPtrFrameLayout.setPtrHandler(new PtrHandler() {
            @Override
            public boolean checkCanDoRefresh(PtrFrameLayout frame, View content, View header) {
                // here check list view, not content.
                return PtrDefaultHandler.checkContentCanBePulledDown(frame, mListView, header);
            }

            @Override
            public void onRefreshBegin(PtrFrameLayout frame) {
                //實現下拉重新整理的功能
                Log.i("test", "-----onRefreshBegin-----");
                mPtrFrameLayout.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        mockStrList.clear();
                        start = 0;
                        mockStrList.addAll(getMockData(start, count));
                        mPtrFrameLayout.refreshComplete();
                        //第一個引數是：資料是否為空；第二個引數是：是否還有更多資料
                        mLoadMoreListViewContainer.loadMoreFinish(false, true);
                        adapter.notifyDataSetChanged();
                    }
                }, 500);
            }
        });
        //設定延時自動重新整理資料
        mPtrFrameLayout.postDelayed(new Runnable() {
            @Override
            public void run() {
                mPtrFrameLayout.autoRefresh(false);
            }
        }, 200);
        //4.載入更多的元件
        mLoadMoreListViewContainer = (LoadMoreListViewContainer) findViewById(R.id.load_more_list_view_container);
        mLoadMoreListViewContainer.setAutoLoadMore(true);//設定是否自動載入更多
        mLoadMoreListViewContainer.useDefaultHeader();
        //5.新增載入更多的事件監聽
        mLoadMoreListViewContainer.setLoadMoreHandler(new LoadMoreHandler() {
            @Override
            public void onLoadMore(LoadMoreContainer loadMoreContainer) {
                //模擬載入更多的業務處理
                mLoadMoreListViewContainer.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        start++;
                        mockStrList.addAll(getMockData(start * 10, count));
                        if (start * 10 > 30) {
//                          mLoadMoreListViewContainer.loadMoreFinish(true, false);
                            //以下是載入失敗的情節
                            int errorCode = 0;
                            String errorMessage = "載入失敗，點選載入更多";
                            mLoadMoreListViewContainer.loadMoreError(errorCode, errorMessage);
                        } else {
                            mLoadMoreListViewContainer.loadMoreFinish(false, true);
                        }
                        adapter.notifyDataSetChanged();
                    }
                }, 1000);
            }
        });
    }

    /**
     * 做一個簡單的內容資料
     * @param start 開始位置
     * @param count 每次拉取的數量
     * @return
     */
    private List<String> getMockData(int start, int count) {
        List<String> slist = new ArrayList<String>();
        for (int i = start; i < start + count; i++) {
            slist.add("內容編號：" + i);
        }
        return slist;
    }

}
 

自定義底部載入內容

1.首先，確認載入狀態，實現LoadMoreUIHandler介面，程式碼如下：

public interface LoadMoreUIHandler {

    public void onLoading(LoadMoreContainer container);

    public void onLoadFinish(LoadMoreContainer container, boolean empty, boolean hasMore);

    public void onWaitToLoadMore(LoadMoreContainer container);

    public void onLoadError(LoadMoreContainer container, int errorCode, String errorMessage);
}

/**
 * Created by jan on 2016/2/24.
 */
public class ILoadMoreFooterView extends RelativeLayout implements LoadMoreUIHandler {
    private ImageView loadingImage;
    private TextView loadText;

    public ILoadMoreFooterView(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

    public ILoadMoreFooterView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        setupViews();
    }

    public ILoadMoreFooterView(Context context) {
        this(context, null);
    }

    private void setupViews() {
        LayoutInflater.from(getContext()).inflate(R.layout.custom_loadmore_footer, this);
        loadingImage = (ImageView) findViewById(R.id.loading_progress_icon);
        loadText = (TextView) findViewById(R.id.loading_text);
        setVisibility(GONE);
    }

    @Override
    public void onLoading(LoadMoreContainer container) {
        setVisibility(VISIBLE);
        loadingImage.setVisibility(VISIBLE);
        loadText.setText(R.string.loading_text);
        final RotateAnimation anim = new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
        anim.setInterpolator(new LinearInterpolator());
        anim.setRepeatCount(-1);
        anim.setDuration(1000);
        loadingImage.setImageResource(R.drawable.progress_loading2);
        loadingImage.startAnimation(anim);
    }

    @Override
    public void onLoadFinish(LoadMoreContainer container, boolean empty, boolean hasMore) {
        if (!hasMore) {
            setVisibility(VISIBLE);
            if (empty) {
                loadText.setText(R.string.loading_empty);
            } else {
                loadText.setText(R.string.loading_finish_empty);
            }
            loadingImage.setVisibility(INVISIBLE);
        } else {
            setVisibility(INVISIBLE);
        }
    }

    @Override
    public void onWaitToLoadMore(LoadMoreContainer container) {
        setVisibility(VISIBLE);
        loadText.setText(R.string.load_click_more);
        loadingImage.setVisibility(INVISIBLE);
    }

    @Override
    public void onLoadError(LoadMoreContainer container, int errorCode, String errorMessage) {
        loadingImage.clearAnimation();
        loadingImage.setImageResource(R.drawable.no_order_get);
        loadText.setText(R.string.loading_finish_error);
    }
}

       ILoadMoreFooterView customMoreView = new ILoadMoreFooterView(this);
        AbsListView.LayoutParams lp = new AbsListView.LayoutParams(-2, LocalDisplay.dp2px(80));
        customMoreView.setLayoutParams(lp);
        mLoadMoreListViewContainer.setLoadMoreView(customMoreView);
        mLoadMoreListViewContainer.setLoadMoreUIHandler(customMoreView);

//        mLoadMoreListViewContainer.useDefaultHeader();