關於android中gridview資料量很大的時候，在載入gridview時會出現卡頓的現象

標籤：android   資料   

好的解決辦法就是先載入一定數量的資料，然後在最下方提示正在載入！
動態載入就是把放入adapter中的資料分好幾次載入。在使用者拖動gridview時再載入一定的資料，和sina微博的用戶端類似。
給gridview添加OnScrollListener監聽事件預設會覆蓋下面兩個方法：

 

下面列舉個列子：

<com.ui.widget.LazyGridView xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/gridview"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:gravity="center"    android:horizontalSpacing="10dp"    android:listSelector="@android:color/transparent"    android:numColumns="2"    android:padding="20dp"    android:stretchMode="columnWidth"    android:verticalSpacing="10dp" />

lazyGridView:

/** * 滾動到底部自動重新整理 *  * @author yinghui.hong *  */public class LazyGridView extends GridView implements OnScrollListener {public LazyGridView(Context context) {super(context);}public LazyGridView(Context context, AttributeSet attrs) {super(context, attrs);}public LazyGridView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {}/** * 列表視圖滾動 */@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {switch (scrollState) {case OnScrollListener.SCROLL_STATE_IDLE:Log.v("onScrollStateChanged", "已經停止：SCROLL_STATE_IDLE");// 判斷滾動到底部if (view.getLastVisiblePosition() == (view.getCount() - 1)) {Log.v("onScrollStateChanged", "到底部啦。可以請求重新整理咯~~~~~~");if (listener != null) {listener.onScrollBottom();}}break;case OnScrollListener.SCROLL_STATE_FLING:Log.v("onScrollStateChanged", "開始滾動：SCROLL_STATE_FLING");break;case OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:Log.v("onScrollStateChanged", "正在滾動：SCROLL_STATE_TOUCH_SCROLL");break;}}private OnScrollBottomListener listener;public void setOnScrollBottomListener(OnScrollBottomListener listener) {this.setOnScrollListener(this);this.listener = listener;}public void removeOnScrollBottomListener() {listener = null;System.out.println("removeOnScrollBottomListener");}/** * 列表視圖滾動到底部監聽器 *  * @author yinghui.hong *  */public interface OnScrollBottomListener {/** * 列表視圖滾動到底部時響應 */public void onScrollBottom();}}

主activity:

@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_circle);getActionBar().setDisplayHomeAsUpEnabled(true);mBeans = new ArrayList<CircleResBean>();mAdapter = new CircleAdapter(this, mBeans);gridView = (LazyGridView) findViewById(R.id.gridview);gridView.setAdapter(mAdapter);gridView.setOnScrollBottomListener(this);mPageIndex = 0;queryJoinedCircles(mPageIndex);}