android listview 下拉刷新 动态加载数据 图文混排

package com.dkkj.communitylsv; import java.util.Date; import android.content.Context; import android.util.AttributeSet; import android.util.Log; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.View.OnClickListener; 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.ListView; import android.widget.ProgressBar; import android.widget.TextView; public class RefreshListView extends ListView implements OnScrollListener, OnClickListener{ private View mHeadView; private TextView mRefreshTextview; private TextView mLastUpdateTextView; private ImageView mArrowImageView; private ProgressBar mHeadProgressBar; private int mHeadContentWidth; private int mHeadContentHeight; private IOnRefreshListener mOnRefreshListener; // 头部刷新监听器 // 用于保证startY的值在一个完整的touch事件中只被记录一次 private boolean mIsRecord = false; // 标记的Y坐标值 private int mStartY = 0; // 当前视图能看到的第一个项的索引 private int mFirstItemIndex = -1; // MOVE时保存的Y坐标值 private int mMoveY = 0; // LISTVIEW状态 private int mViewState = IListViewState.LVS_NORMAL; private final static int RATIO = 2; private RotateAnimation animation; private RotateAnimation reverseAnimation; private boolean mBack = false; public RefreshListView(Context context) { super(context); init(context); } public RefreshListView(Context context, AttributeSet attrs) { super(context, attrs); init(context); } public void setOnRefreshListener(IOnRefreshListener listener) { mOnRefreshListener = listener; } private void onRefresh() { if (mOnRefreshListener != null) { mOnRefreshListener.OnRefresh(); } } public void onRefreshComplete() { mHeadView.setPadding(0, -1 * mHeadContentHeight, 0, 0); mLastUpdateTextView.setText("最近更新:" + new Date().toLocaleString()); switchViewState(IListViewState.LVS_NORMAL); } private void init(Context context) { initHeadView(context); initLoadMoreView(context); setOnScrollListener(this); } // 初始化headview试图 private void initHeadView(Context context) { mHeadView = LayoutInflater.from(context).inflate(R.layout.head, null); mArrowImageView = (ImageView) mHeadView.findViewById(R.id.head_arrowImageView); mArrowImageView.setMinimumWidth(60); mHeadProgressBar= (ProgressBar) mHeadView.findViewById(R.id.head_progressBar); mRefreshTextview = (TextView) mHeadView.findViewById(R.id.head_tipsTextView); mLastUpdateTextView = (TextView) mHeadView.findViewById(R.id.head_lastUpdatedTextView); measureView(mHeadView); mHeadContentHeight = mHeadView.getMeasuredHeight(); mHeadContentWidth = mHeadView.getMeasuredWidth(); mHeadView.setPadding(0, -1 * mHeadContentHeight, 0, 0); mHeadView.invalidate(); addHeaderView(mHeadView, null, false); 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); } // 初始化footview试图 private void initLoadMoreView(Context context) { mFootView= LayoutInflater.from(context).inflate(R.layout.loadmore, null); mLoadMoreView = mFootView.findViewById(R.id.load_more_view); mLoadMoreTextView = (TextView) mFootView.findViewById(R.id.load_more_tv); mLoadingView = mFootView.findViewById(R.id.loading_layout); mLoadMoreView.setOnClickListener(this); addFooterView(mFootView); } // 此方法直接照搬自网络上的一个下拉刷新的demo，计算headView的width以及height private void measureView(View child) { ViewGroup.LayoutParams p = child.getLayoutParams(); if (p == null) { p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); } int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0, p.width); int lpHeight = p.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 onScroll(AbsListView arg0, int firstVisiableItem, int visibleItemCount, int totalItemCount) { mFirstItemIndex = firstVisiableItem; } public void onScrollStateChanged(AbsListView arg0, int arg1) { } @Override public boolean onTouchEvent(MotionEvent ev) { if (mOnRefreshListener != null) { switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: doActionDown(ev); break; case MotionEvent.ACTION_MOVE: doActionMove(ev); break; case MotionEvent.ACTION_UP: doActionUp(ev); break; default: break; } } return super.onTouchEvent(ev); } private void doActionDown(MotionEvent ev) { if(mIsRecord == false && mFirstItemIndex == 0) { mStartY = (int) ev.getY(); mIsRecord = true; } } private void doActionMove(MotionEvent ev) { mMoveY = (int) ev.getY(); if(mIsRecord == false && mFirstItemIndex == 0) { mStartY = (int) ev.getY(); mIsRecord = true; } if (mIsRecord == false || mViewState == IListViewState.LVS_LOADING) { return ; } int offset = (mMoveY - mStartY) / RATIO; switch(mViewState) { case IListViewState.LVS_NORMAL: { if (offset > 0) { mHeadView.setPadding(0, offset - mHeadContentHeight, 0, 0); switchViewState(IListViewState.LVS_PULL_REFRESH); } } break; case IListViewState.LVS_PULL_REFRESH: { setSelection(0); mHeadView.setPadding(0, offset - mHeadContentHeight, 0, 0); if (offset < 0) { switchViewState(IListViewState.LVS_NORMAL); }else if (offset > mHeadContentHeight) { switchViewState(IListViewState.LVS_RELEASE_REFRESH); } } break; case IListViewState.LVS_RELEASE_REFRESH: { setSelection(0); mHeadView.setPadding(0, offset - mHeadContentHeight, 0, 0); if (offset >= 0 && offset <= mHeadContentHeight) { mBack = true; switchViewState(IListViewState.LVS_PULL_REFRESH); }else if (offset < 0) { switchViewState(IListViewState.LVS_NORMAL); }else{ } } break; default: return; }; } private void doActionUp(MotionEvent ev) { mIsRecord = false; mBack = false; if (mViewState == IListViewState.LVS_LOADING) { return ; } switch(mViewState) { case IListViewState.LVS_NORMAL: break; case IListViewState.LVS_PULL_REFRESH: mHeadView.setPadding(0, -1 * mHeadContentHeight, 0, 0); switchViewState(IListViewState.LVS_NORMAL); break; case IListViewState.LVS_RELEASE_REFRESH: mHeadView.setPadding(0, 0, 0, 0); switchViewState(IListViewState.LVS_LOADING); onRefresh(); break; } } // 切换headview视图 private void switchViewState(int state) { switch(state) { case IListViewState.LVS_NORMAL: { Log.e("!!!!!!!!!!!", "convert to IListViewState.LVS_NORMAL"); mArrowImageView.clearAnimation(); mArrowImageView.setImageResource(R.drawable.arrow);