Recyclerview下拉刷新上拉加载及adapter封装

package com.byl.recyclerview.view; import android.content.Context; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.util.AttributeSet; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.animation.LinearInterpolator; import android.view.animation.RotateAnimation; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ProgressBar; import android.widget.TextView; import com.byl.recyclerview.R; import java.text.SimpleDateFormat; import java.util.Date; /** * @author dinus */ public abstract class PullBaseView<T extends RecyclerView> extends LinearLayout { protected T mRecyclerView; private boolean isCanScrollAtRereshing = false;//刷新时是否可滑动 private boolean isCanPullDown = true;//是否可下拉 private boolean isCanPullUp = true;//是否可上拉 // pull state private static final int PULL_UP_STATE = 0; private static final int PULL_DOWN_STATE = 1; // refresh states private static final int PULL_TO_REFRESH = 2; private static final int RELEASE_TO_REFRESH = 3; private static final int REFRESHING = 4; private int mLastMotionY; //headerview private View mHeaderView; private int mHeaderViewHeight; private ImageView mHeaderImageView; private TextView mHeaderTextView; private TextView mHeaderUpdateTextView; private ProgressBar mHeaderProgressBar; //footerview private View mFooterView; private int mFooterViewHeight; private TextView mFooterTextView; private ProgressBar mFooterProgressBar; private LayoutInflater mInflater; private int mHeaderState; private int mFooterState; private int mPullState; private RotateAnimation mFlipAnimation;//变为向下的箭头,改变箭头方向 private RotateAnimation mReverseFlipAnimation;//变为逆向的箭头,旋转 private OnRefreshListener refreshListener; public PullBaseView(Context context, AttributeSet attrs) { super(context, attrs); init(context, attrs); } public PullBaseView(Context context) { super(context); } /** * init * * @description hylin 2012-7-26上午10:08:33 */ private void init(Context context, AttributeSet attrs) { // Load all of the animations we need in code rather than through XML mFlipAnimation = new RotateAnimation(0, -180, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f); mFlipAnimation.setInterpolator(new LinearInterpolator()); mFlipAnimation.setDuration(250); mFlipAnimation.setFillAfter(true); mReverseFlipAnimation = new RotateAnimation(-180, 0, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f); mReverseFlipAnimation.setInterpolator(new LinearInterpolator()); mReverseFlipAnimation.setDuration(250); mReverseFlipAnimation.setFillAfter(true); mInflater = LayoutInflater.from(getContext()); // header view 在此添加,保证是第一个添加到linearlayout的最上端 addHeaderView(); mRecyclerView = createRecyclerView(context, attrs); mRecyclerView.setOverScrollMode(View.OVER_SCROLL_NEVER); addView(mRecyclerView); } private void addHeaderView() { // header view mHeaderView = mInflater.inflate(R.layout.refresh_header, this, false); mHeaderImageView = (ImageView) mHeaderView.findViewById(R.id.pull_to_refresh_image); mHeaderTextView = (TextView) mHeaderView.findViewById(R.id.pull_to_refresh_text); mHeaderUpdateTextView = (TextView) mHeaderView.findViewById(R.id.pull_to_refresh_updated_at); mHeaderProgressBar = (ProgressBar) mHeaderView.findViewById(R.id.pull_to_refresh_progress); mHeaderUpdateTextView.setText("最近更新:" + getFormatDateString("MM-dd HH:mm")); // header layout measureView(mHeaderView); mHeaderViewHeight = mHeaderView.getMeasuredHeight(); LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, mHeaderViewHeight); // 设置topMargin的值为负的header View高度,即将其隐藏在最上方 params.topMargin = -(mHeaderViewHeight); // mHeaderView.setLayoutParams(params1); addView(mHeaderView, params); } public static final String getFormatDateString(String format) { SimpleDateFormat sdf = new SimpleDateFormat(format); return sdf.format(new Date()); } private void addFooterView() { // footer view mFooterView = mInflater.inflate(R.layout.refresh_footer, this, false); mFooterTextView = (TextView) mFooterView.findViewById(R.id.pull_to_load_text); mFooterProgressBar = (ProgressBar) mFooterView.findViewById(R.id.pull_to_load_progress); measureView(mFooterView); mFooterViewHeight = mFooterView.getMeasuredHeight(); LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, mFooterViewHeight); addView(mFooterView, params); } @Override protected void onFinishInflate() { super.onFinishInflate(); addFooterView(); } @Override public boolean dispatchTouchEvent(MotionEvent ev) { switch (ev.getAction()) {//刷新时禁止滑动 case MotionEvent.ACTION_DOWN: case MotionEvent.ACTION_MOVE: case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: if (!isCanScrollAtRereshing) { if (mHeaderState == REFRESHING || mFooterState == REFRESHING) { return true; } } break; } return super.dispatchTouchEvent(ev); } @Override public boolean onInterceptTouchEvent(MotionEvent e) { int y = (int) e.getRawY(); int x = (int) e.getRawX(); switch (e.getAction()) { case MotionEvent.ACTION_DOWN: // 首先拦截down事件,记录y坐标 mLastMotionY = y; break; case MotionEvent.ACTION_MOVE: // deltaY > 0 是向下运动,< 0是向上运动 int deltaY = y - mLastMotionY; if (isRefreshViewScroll(deltaY)) { return true; } break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: break; } return false; } /* * 如果在onInterceptTouchEvent()方法中没有拦截(即onInterceptTouchEvent()方法中 return * false)PullBaseView 的子View来处理;否则由下面的方法来处理(即由PullToRefreshView自己来处理) */ @Override public boolean onTouchEvent(MotionEvent event) { int y = (int) event.getRawY(); switch (event.getAction()) { case MotionEvent.ACTION_MOVE: int deltaY = y - mLastMotionY; if (isCanPullDown && mPullState == PULL_DOWN_STATE) { headerPrepareToRefresh(deltaY); } else if (isCanPullUp && mPullState == PULL_UP_STATE) { footerPrepareToRefresh(deltaY); } mLastMotionY = y; break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: int topMargin = getHeaderTopMargin(); if (isCanPullDown && mPullState == PULL_DOWN_STATE) { if (topMargin >= 0) { // 开始刷新 headerRefreshing(); } else { // 还没有执行刷新，重新隐藏 setHeaderTopMargin(-mHeaderViewHeight); } } else