package com.hhzt.iptv.ui.customview;
import android.content.Context;import android.content.res.TypedArray;import android.graphics.Rect;import android.os.Build;import android.support.v4.view.ViewCompat;import android.support.v7.widget.GridLayoutManager;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.util.AttributeSet;import android.util.Log;import android.view.FocusFinder;import android.view.KeyEvent;import android.view.MotionEvent;import android.view.View;
import com.hhzt.iptv.R;import com.hhzt.iptv.lvb_w.interfaces.OnInterceptListener;import com.hhzt.iptv.lvb_w.utils.VirturlKeyPadCtr;
/** * Created by Administrator on 2017/6/7. */
public class TvRecyclerView extends RecyclerView { private static final String TAG = "TvRecyclerView";
private int position;
//焦点是否居中 private boolean mSelectedItemCentered;
private int mSelectedItemOffsetStart;
private int mSelectedItemOffsetEnd;
//分页的时候使用 private int mLoadMoreBeforehandCount = 0;
public TvRecyclerView(Context context) { this(context, null); }
public TvRecyclerView(Context context, AttributeSet attrs) { this(context, attrs, -1); }
public TvRecyclerView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(context, attrs, defStyle); }
private void init(Context context, AttributeSet attrs, int defStyle) { initView(); initAttr(context, attrs); }
private void initView() { setDescendantFocusability(FOCUS_AFTER_DESCENDANTS); setHasFixedSize(true); setWillNotDraw(true); setOverScrollMode(View.OVER_SCROLL_NEVER); setChildrenDrawingOrderEnabled(true);
setClipChildren(false); setClipToPadding(false);
setClickable(false); setFocusable(true); setFocusableInTouchMode(true); /** 防止RecyclerView刷新时焦点不错乱bug的步骤如下: (1)adapter执行setHasStableIds(true)方法 (2)重写getItemId()方法,让每个view都有各自的id (3)RecyclerView的动画必须去掉 */ setItemAnimator(null); }
private void initAttr(Context context, AttributeSet attrs) { if (attrs != null) { final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.TvRecyclerView); /** * 如果是towWayView的layoutManager */ final String name = a.getString(R.styleable.TvRecyclerView_tv_layoutManager);
mSelectedItemCentered = a.getBoolean(R.styleable.TvRecyclerView_tv_selectedItemCentered, false);
mLoadMoreBeforehandCount = a.getInteger(R.styleable.TvRecyclerView_tv_loadMoreBeforehandCount, 0);
mSelectedItemOffsetStart = a.getDimensionPixelSize(R.styleable.TvRecyclerView_tv_selectedItemOffsetStart, 0);
mSelectedItemOffsetEnd = a.getDimensionPixelSize(R.styleable.TvRecyclerView_tv_selectedItemOffsetEnd, 0);
a.recycle(); } }
private int getFreeWidth() { return getWidth() - getPaddingLeft() - getPaddingRight(); }
private int getFreeHeight() { return getHeight() - getPaddingTop() - getPaddingBottom(); }
@Override protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) { super.onFocusChanged(gainFocus, direction, previouslyFocusedRect); }
@Override public boolean hasFocus() { return super.hasFocus(); }
@Override public boolean isInTouchMode() { // 解决4.4版本抢焦点的问题 if (Build.VERSION.SDK_INT == 19) { return !(hasFocus() && !super.isInTouchMode()); } else { return super.isInTouchMode(); }
//return super.isInTouchMode(); }
@Override public void requestChildFocus(View child, View focused) {
if (null != child) { if (mSelectedItemCentered) { mSelectedItemOffsetStart = !isVertical() ? (getFreeWidth() - child.getWidth()) : (getFreeHeight() - child.getHeight()); mSelectedItemOffsetStart /= 2; mSelectedItemOffsetEnd = mSelectedItemOffsetStart; } } super.requestChildFocus(child, focused); }
@Override public boolean requestChildRectangleOnScreen(View child, Rect rect, boolean immediate) { final int parentLeft = getPaddingLeft(); final int parentRight = getWidth() - getPaddingRight();
final int parentTop = getPaddingTop(); final int parentBottom = getHeight() - getPaddingBottom();
final int childLeft = child.getLeft() + rect.left; final int childTop = child.getTop() + rect.top;
final int childRight = childLeft + rect.width(); final int childBottom = childTop + rect.height();
final int offScreenLeft = Math.min(0, childLeft - parentLeft - mSelectedItemOffsetStart); final int offScreenRight = Math.max(0, childRight - parentRight + mSelectedItemOffsetEnd);
final int offScreenTop = Math.min(0, childTop - parentTop - mSelectedItemOffsetStart); final int offScreenBottom = Math.max(0, childBottom - parentBottom + mSelectedItemOffsetEnd);
final boolean canScrollHorizontal = getLayoutManager().canScrollHorizontally(); final boolean canScrollVertical = getLayoutManager().canScrollVertically();
// Favor the "start" layout direction over the end when bringing one side or the other // of a large rect into view. If we decide to bring in end because start is already // visible, limit the scroll such that start won‘t go out of bounds. final int dx; if (canScrollHorizontal) { if (ViewCompat.getLayoutDirection(this) == ViewCompat.LAYOUT_DIRECTION_RTL) { dx = offScreenRight != 0 ? offScreenRight : Math.max(offScreenLeft, childRight - parentRight); } else { dx = offScreenLeft != 0 ? offScreenLeft : Math.min(childLeft - parentLeft, offScreenRight); } } else { dx = 0; }
// Favor bringing the top into view over the bottom. If top is already visible and // we should scroll to make bottom visible, make sure top does not go out of bounds. final int dy; if (canScrollVertical) { dy = offScreenTop != 0 ? offScreenTop : Math.min(childTop - parentTop, offScreenBottom); } else { dy = 0; }
if (dx != 0 || dy != 0) { if (immediate) { scrollBy(dx, dy); } else { smoothScrollBy(dx, dy); } // 重绘是为了选中item置顶，具体请参考getChildDrawingOrder方法 postInvalidate(); return true; }
return false; }
@Override public int getBaseline() { return -1; }
public int getSelectedItemOffsetStart() { return mSelectedItemOffsetStart; }
public int getSelectedItemOffsetEnd() { return mSelectedItemOffsetEnd; }
@Override public void setLayoutManager(LayoutManager layout) { super.setLayoutManager(layout); }
/** * 判断是垂直，还是横向. */ private boolean isVertical() { LayoutManager manager = getLayoutManager(); if (manager != null) { LinearLayoutManager layout = (LinearLayoutManager) getLayoutManager(); return layout.getOrientation() == LinearLayoutManager.VERTICAL;
} return false; }
/** * 设置选中的Item距离开始或结束的偏移量； * 与滚动方向有关； * 与setSelectedItemAtCentered()方法二选一 * * @param offsetStart * @param offsetEnd 从结尾到你移动的位置. */ public void setSelectedItemOffset(int offsetStart, int offsetEnd) { setSelectedItemAtCentered(false); mSelectedItemOffsetStart = offsetStart; mSelectedItemOffsetEnd = offsetEnd; }
/** * 设置选中的Item居中； * 与setSelectedItemOffset()方法二选一 * * @param isCentered */ public void setSelectedItemAtCentered(boolean isCentered) { this.mSelectedItemCentered = isCentered; }
@Override protected int getChildDrawingOrder(int childCount, int i) { View view = getFocusedChild(); if (null != view) {
position = getChildAdapterPosition(view) - getFirstVisiblePosition(); if (position < 0) { return i; } else { if (i == childCount - 1) {//这是最后一个需要刷新的item if (position > i) { position = i; } return position; } if (i == position) {//这是原本要在最后一个刷新的item return childCount - 1; } } } return i; }
public int getFirstVisiblePosition() { if (getChildCount() == 0) return 0; else return getChildAdapterPosition(getChildAt(0)); }
public int getLastVisiblePosition() { final int childCount = getChildCount(); if (childCount == 0) return 0; else return getChildAdapterPosition(getChildAt(childCount - 1)); }
/*********** * 按键加载更多 start **********/
private OnLoadMoreListener mOnLoadMoreListener;
public interface OnLoadMoreListener { void onLoadMore(); }
public void setOnLoadMoreListener(OnLoadMoreListener onLoadMoreListener) { this.mOnLoadMoreListener = onLoadMoreListener; }
private OnInterceptListener mInterceptLister;
public void setOnInterceptListener(OnInterceptListener listener) { this.mInterceptLister = listener; }
/** * 设置为0，这样可以防止View获取焦点的时候，ScrollView自动滚动到焦点View的位置 */
protected int computeScrollDeltaToGetChildRectOnScreen(Rect rect) { return 0; }
@Override public void onScrollStateChanged(int state) { if (state == SCROLL_STATE_IDLE) { // 加载更多回调 if (null != mOnLoadMoreListener) { if (getLastVisiblePosition() >= getAdapter().getItemCount() - (1 + mLoadMoreBeforehandCount)) { mOnLoadMoreListener.onLoadMore(); } } } super.onScrollStateChanged(state); }
@Override public boolean dispatchKeyEvent(KeyEvent event) { if (mInterceptLister != null && mInterceptLister.onIntercept(event)) { return true; }
boolean result = super.dispatchKeyEvent(event); View focusView = this.getFocusedChild(); if (focusView == null) { return result; } else {
int dy = 0; int dx = 0; if (getChildCount() > 0) { View firstView = this.getChildAt(0); dy = firstView.getHeight(); dx = firstView.getWidth(); } if (event.getAction() == KeyEvent.ACTION_UP) { return true; } else { switch (event.getKeyCode()) { case KeyEvent.KEYCODE_DPAD_RIGHT: if(VirturlKeyPadCtr.isFastDoubleClick()){ return true; }else { View rightView = FocusFinder.getInstance().findNextFocus(this, focusView, View.FOCUS_RIGHT); Log.i(TAG, "rightView is null:" + (rightView == null)); if (rightView != null) { rightView.requestFocus(); return true; } else { this.smoothScrollBy(dx, 0); return true; } } case KeyEvent.KEYCODE_DPAD_LEFT: View leftView = FocusFinder.getInstance().findNextFocus(this, focusView, View.FOCUS_LEFT); Log.i(TAG, "leftView is null:" + (leftView == null)); if (leftView != null) { leftView.requestFocus(); return true; } else { this.smoothScrollBy(-dx, 0); return true; } case KeyEvent.KEYCODE_DPAD_DOWN: View downView = FocusFinder.getInstance().findNextFocus(this, focusView, View.FOCUS_DOWN); Log.i(TAG, " downView is null:" + (downView == null)); if (downView != null) { downView.requestFocus(); return true; } else { this.smoothScrollBy(0, dy); return true; } case KeyEvent.KEYCODE_DPAD_UP: View upView = FocusFinder.getInstance().findNextFocus(this, focusView, View.FOCUS_UP); Log.i(TAG, "upView is null:" + (upView == null)); if (event.getAction() == KeyEvent.ACTION_UP) { return true; } else { if (upView != null) { upView.requestFocus(); return true; } else { this.smoothScrollBy(0, -dy); return true; }
} }
}
} return result; }
@Override public boolean onInterceptTouchEvent(MotionEvent e) { return super.onInterceptTouchEvent(e); }
/** * 设置默认选中. */
public void setSelectedPosition(int pos) { this.smoothScrollToPosition(pos); }
//防止Activity时,RecyclerView崩溃 @Override protected void onDetachedFromWindow() { if (getLayoutManager() != null) { super.onDetachedFromWindow(); } }
/** * 是否是最右边的item，如果是竖向，表示右边，如果是横向表示下边 * * @param childPosition * @return */ public boolean isRightEdge(int childPosition) { LayoutManager layoutManager = getLayoutManager();
if (layoutManager instanceof GridLayoutManager) {
GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager; GridLayoutManager.SpanSizeLookup spanSizeLookUp = gridLayoutManager.getSpanSizeLookup();
int totalSpanCount = gridLayoutManager.getSpanCount(); int totalItemCount = gridLayoutManager.getItemCount(); int childSpanCount = 0;
for (int i = 0; i <= childPosition; i++) { childSpanCount += spanSizeLookUp.getSpanSize(i); } if (isVertical()) { if (childSpanCount % gridLayoutManager.getSpanCount() == 0) { return true; } } else { int lastColumnSize = totalItemCount % totalSpanCount; if (lastColumnSize == 0) { lastColumnSize = totalSpanCount; } if (childSpanCount > totalItemCount - lastColumnSize) { return true; } }
} else if (layoutManager instanceof LinearLayoutManager) { if (isVertical()) { return true; }else{ return childPosition == getLayoutManager().getItemCount() - 1; } }
return false; }
/** * 是否是最左边的item，如果是竖向，表示左方，如果是横向，表示上边 * * @param childPosition * @return */ public boolean isLeftEdge(int childPosition) { LayoutManager layoutManager = getLayoutManager(); if (layoutManager instanceof GridLayoutManager) { GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager; GridLayoutManager.SpanSizeLookup spanSizeLookUp = gridLayoutManager.getSpanSizeLookup();
int totalSpanCount = gridLayoutManager.getSpanCount(); int childSpanCount = 0; for (int i = 0; i <= childPosition; i++) { childSpanCount += spanSizeLookUp.getSpanSize(i); } if (isVertical()) { if (childSpanCount % gridLayoutManager.getSpanCount() == 1) { return true; } } else { if (childSpanCount <= totalSpanCount) { return true; } }
} else if (layoutManager instanceof LinearLayoutManager) { if (isVertical()) { return true; } else { return childPosition == 0; }
}
return false; }
/** * 是否是最上边的item，以recyclerview的方向做参考 * * @param childPosition * @return */ public boolean isTopEdge(int childPosition) { LayoutManager layoutManager = getLayoutManager(); if (layoutManager instanceof GridLayoutManager) { GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager; GridLayoutManager.SpanSizeLookup spanSizeLookUp = gridLayoutManager.getSpanSizeLookup();
int totalSpanCount = gridLayoutManager.getSpanCount();
int childSpanCount = 0; for (int i = 0; i <= childPosition; i++) { childSpanCount += spanSizeLookUp.getSpanSize(i); }
if (isVertical()) { if (childSpanCount <= totalSpanCount) { return true; } } else { if (childSpanCount % totalSpanCount == 1) { return true; } }
} else if (layoutManager instanceof LinearLayoutManager) { if (isVertical()) { return childPosition == 0; } else { return true; }
}
return false; }
/** * 是否是最下边的item，以recyclerview的方向做参考 * * @param childPosition * @return */ public boolean isBottomEdge(int childPosition) { LayoutManager layoutManager = getLayoutManager(); if (layoutManager instanceof GridLayoutManager) { GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager; GridLayoutManager.SpanSizeLookup spanSizeLookUp = gridLayoutManager.getSpanSizeLookup(); int itemCount = gridLayoutManager.getItemCount(); int childSpanCount = 0; int totalSpanCount = gridLayoutManager.getSpanCount(); for (int i = 0; i <= childPosition; i++) { childSpanCount += spanSizeLookUp.getSpanSize(i); } if (isVertical()) { //最后一行item的个数 int lastRowCount = itemCount % totalSpanCount; if (lastRowCount == 0) { lastRowCount = gridLayoutManager.getSpanCount(); } if (childSpanCount > itemCount - lastRowCount) { return true; } } else { if (childSpanCount % totalSpanCount == 0) { return true; } }
} else if (layoutManager instanceof LinearLayoutManager) { if (isVertical()) { return childPosition == getLayoutManager().getItemCount() - 1; } else { return true; }
} return false; }
}/*延时焦点的移动*/
public static boolean isFastDoubleClick() { long time = System.currentTimeMillis(); long timeD = time - lastClickTime; if ( 0 < timeD && timeD < 200) { return true; } lastClickTime = time; return false;}
时间： 2024-10-27 12:24:45