編輯:關於Android編程
});
整個代碼比較簡單只有一個類
import android.content.Context; import android.util.AttributeSet; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.widget.AbsListView; import android.widget.AbsListView.OnScrollListener; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.ProgressBar; import android.widget.RelativeLayout; import com.ferris.ferrisapp.R; public class LoadMoreListView extends ListView implements OnScrollListener { private static final String TAG = "LoadMoreListView"; /** * Listener that will receive notifications every time the list scrolls. */ private OnScrollListener mOnScrollListener; private LayoutInflater mInflater; private Boolean isEnable = true; public Boolean getIsEnable() { return isEnable; } public void setIsEnable(Boolean isEnable) { this.isEnable = isEnable; } // footer view private RelativeLayout mFooterView; // private TextView mLabLoadMore; private ProgressBar mProgressBarLoadMore; // Listener to process load more items when user reaches the end of the list private OnLoadMoreListener mOnLoadMoreListener; // To know if the list is loading more items private boolean mIsLoadingMore = false; private int mCurrentScrollState; public LoadMoreListView(Context context) { super(context); init(context); } public LoadMoreListView(Context context, AttributeSet attrs) { super(context, attrs); init(context); } public LoadMoreListView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(context); } private void init(Context context) { mInflater = (LayoutInflater) context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); // footer mFooterView = (RelativeLayout) mInflater.inflate( R.layout.load_more_footer, this, false);//加載底部view /* * mLabLoadMore = (TextView) mFooterView * .findViewById(R.id.load_more_lab_view); */ mProgressBarLoadMore = (ProgressBar) mFooterView .findViewById(R.id.load_more_progressBar); addFooterView(mFooterView); super.setOnScrollListener(this);//設置滾動監聽 } @Override public void setAdapter(ListAdapter adapter) { super.setAdapter(adapter); } /** * Set the listener that will receive notifications every time the list * scrolls. * * @param l * The scroll listener. */ @Override public void setOnScrollListener(AbsListView.OnScrollListener l) { mOnScrollListener = l; } /** * Register a callback to be invoked when this list reaches the end (last * item be visible) * * @param onLoadMoreListener * The callback to run. */ public void setOnLoadMoreListener(OnLoadMoreListener onLoadMoreListener) { mOnLoadMoreListener = onLoadMoreListener; } public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { if (isEnable) {//是否開啟滑動 if (mOnScrollListener != null) { mOnScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount); } if (mOnLoadMoreListener != null) { if (visibleItemCount == totalItemCount) {//剛好鋪滿一個屏幕, mProgressBarLoadMore.setVisibility(View.GONE); return; } boolean loadMore = firstVisibleItem + visibleItemCount >= totalItemCount;//滑動到底部 if (!mIsLoadingMore && loadMore && mCurrentScrollState != SCROLL_STATE_IDLE) { //判斷如果滾動到底部,並且已經停止滾動的時候,我們就顯示底部加載更多。 mProgressBarLoadMore.setVisibility(View.VISIBLE); mIsLoadingMore = true; onLoadMore();//回調監聽 } } } } /** * 禁止滑動 ,view重繪,否則導致閃爍 */ public void onScrollStateChanged(AbsListView view, int scrollState) { // bug fix: listview was not clickable after scroll //由於我並不需要listvie item是否可以按。所以我屏蔽掉了這個,否則有可能加載圖片會閃爍不停哦。這個地方要注意。 if (isEnable) {//是否開啟滑動 // if (scrollState == OnScrollListener.SCROLL_STATE_IDLE) { // view.invalidateViews(); // } mCurrentScrollState = scrollState; if (mOnScrollListener != null) { mOnScrollListener.onScrollStateChanged(view, scrollState); } } } public void onLoadMore() { Log.d(TAG, "onLoadMore"); if (mOnLoadMoreListener != null) { mOnLoadMoreListener.onLoadMore(); } } /** * Notify the loading more operation has finished */ public void onLoadMoreComplete() { mIsLoadingMore = false; mProgressBarLoadMore.setVisibility(View.GONE); } /** * Interface definition for a callback to be invoked when list reaches the * last item (the user load more items in the list) */ public interface OnLoadMoreListener { /** * Called when the list reaches the last item (the last item is visible * to the user) */ public void onLoadMore(); } }
(1)在res--menu目錄下的main.xml文件
余額寶和微信理財通是兩大競爭對手,第一:支付寶和微信的競爭,都在搶占移動支付的領地;第二:余額寶和微信理財通各大基金競爭。但是對於我們普通用戶來說,余額寶和
一、前言如果你英文不錯建議你去官網看,官網底部也有翻譯語言選擇。官網地址:http://developer.android.com/preview/api-overvie
至於fragment的使用就不多說了,直奔主題, 布局文件: //導航欄