其實可以在一篇文章中寫完這6種方式娃圆，但是我自己的習(xí)慣——不喜歡閱讀太長的文章褪储，硬生生的被我截斷了疗韵，其實主要是這幾種沒有什么聯(lián)系，分開讀也無所謂李命。繼續(xù)剩下的3種：
4.定義一個自己的RecyclerView類
見代碼：
//初始化
private void init() {
addOnChildAttachStateChangeListener(new OnChildAttachStateChangeListener() {
@Override//當(dāng)子View被添加到Window
public void onChildViewAttachedToWindow(View view) {
//此處參數(shù)的view就是ItemView
//這里可以這么實現(xiàn)
view.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
//這里就可以回調(diào)自己定義的接口方法了
}
});
}
@Override//當(dāng)子View從Window中移除/解綁
public void onChildViewDetachedFromWindow(View view) {
//此處參數(shù)的view就是ItemView
//那么這里我們可以做些什么事了登淘？
//兩種方案：
//1.啥也不做；
// do nothing
//2.把view的點(diǎn)擊事件取消
view.setOnClickListener(null);
}
});
}
出自簡書：http://www.reibang.com/p/3070695619b9
其實和上一篇是一個人寫的项戴，我喜歡簡單粗暴，于是直接放了鏈接槽惫，還有這種方法我還沒試周叮，明天寫個demo試試。
5.RecyclerView 已有的方法 addOnItemTouchListener()+GestureDetectorCompat
（1）為RecyclerView添加addOnItemTouchListener
查看 RecyclerView 源碼可以看到, RecyclerView 預(yù)留了一個Item的觸摸事件方法:
/**
* Add an {@link OnItemTouchListener} to intercept touch events before they are dispatched
* to child views or this view's standard scrolling behavior.
*
* <p>Client code may use listeners to implement item manipulation behavior. Once a listener
* returns true from
* {@link OnItemTouchListener#onInterceptTouchEvent(RecyclerView, MotionEvent)} its
* {@link OnItemTouchListener#onTouchEvent(RecyclerView, MotionEvent)} method will be called
* for each incoming MotionEvent until the end of the gesture.
*
* @param listener Listener to add
* @see SimpleOnItemTouchListener
*/
public void addOnItemTouchListener(OnItemTouchListener listener) {
mOnItemTouchListeners.add(listener);
}
代碼如下：
recyclerView.addOnItemTouchListener(new OnItemTouchListener(recyclerView) {
@Override
public void onItemClick(RecyclerView.ViewHolder vh) {
//item 操作
}
});
通過注釋我們可知,此方法是在滾動事件之前調(diào)用.需要傳入一個 OnItemTouchListener 對象. OnItemTouchListener 的代碼如下:
public static interface OnItemTouchListener {
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e);
public void onTouchEvent(RecyclerView rv, MotionEvent e);
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept);
}
第一個是攔截觸摸事件的界斜，第二個是處理觸摸事件的仿耽，第三個是處理觸摸沖突的。第三個這里我們用不到各薇，不用管项贺，至于前兩個我們只要向下面我們用到的GestureDetectorCompat傳遞MotionEvent為了獲取觸摸的坐標(biāo),最后再定義個abstract回調(diào)。
此接口還提供了一個實現(xiàn)類,且官方推薦使用該實現(xiàn)類 SimpleOnItemTouchListener
/**
* An implementation of {@link RecyclerView.OnItemTouchListener} that has empty method bodies and
* default return values.
* You may prefer to extend this class if you don't need to override all methods. Another
* benefit of using this class is future compatibility. As the interface may change, we'll
* always provide a default implementation on this class so that your code won't break when
* you update to a new version of the support library.
*/
public static class SimpleOnItemTouchListener implements RecyclerView.OnItemTouchListener {
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
return false;
}
@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
在觸摸接口中,當(dāng)觸摸時會回調(diào)一個 MotionEvent 對象,通過使用 GestureDetectorCompat 來解析用戶的操作峭判。
（2）寫一個 ItemClickListener
類繼承 SimpleOnItemTouchListener
,構(gòu)造時傳入 RecyclerView
對象和Item點(diǎn)擊回調(diào),并覆寫父類的 boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e)
方法,具體代碼如下:
/**
* 點(diǎn)擊事件
*/
public class ItemClickListener extends RecyclerView.SimpleOnItemTouchListener {
private OnItemClickListener clickListener;
private GestureDetectorCompat gestureDetector;
public interface OnItemClickListener {
void onItemClick(View view, int position);
void onItemLongClick(View view, int position);
}
public ItemClickListener(final RecyclerView recyclerView,
OnItemClickListener listener) {
this.clickListener = listener;
gestureDetector = new GestureDetectorCompat(recyclerView.getContext(),
new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onSingleTapUp(MotionEvent e) {
View childView = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (childView != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
clickListener.onItemClick(childView, recyclerView.getChildAdapterPosition(childView));
}
return true;
}
@Override
public void onLongPress(MotionEvent e) {
View childView = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (childView != null && clickListener != null) {
clickListener.onItemLongClick(childView,
recyclerView.getChildAdapterPosition(childView));
}
}
});
}
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
gestureDetector.onTouchEvent(e);
return false;
}
}
在 GestureDetectorCompat 的手勢回調(diào)中我們覆寫:
boolean onSingleTapUp(MotionEvent e)
void onLongPress(MotionEvent e)
（3）使用事件監(jiān)聽
在 RecyclerView 的對象中添加 addOnItemTouchListener() 方法,然后在回調(diào)中處理你需要的事件:
recyclerView.addOnItemTouchListener(new SingleItemClickListener(recyclerView,
new SingleItemClickListener.OnItemClickListener() {
@Override
public void onItemClick(View view, int position) {
DevLog.i("touch click name:" + position);
Toast.makeText(SingleActivity.this, "touch click:" + position, Toast.LENGTH_SHORT).show();
}
@Override
public void onItemLongClick(View view, int position) {
DevLog.i("touch long click:" + position);
Toast.makeText(SingleActivity.this, "touch long click:" + position, Toast.LENGTH_SHORT).show();
}
}));
6.當(dāng) ItemView attach RecyclerView 時實現(xiàn)
代碼如下:
public class ItemClickSupport {
private final RecyclerView mRecyclerView;
private OnItemClickListener mOnItemClickListener;
private OnItemLongClickListener mOnItemLongClickListener;
private View.OnClickListener mOnClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mOnItemClickListener != null) {
RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
mOnItemClickListener.onItemClicked(mRecyclerView, holder.getAdapterPosition(), v);
}
}
};
private View.OnLongClickListener mOnLongClickListener = new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
if (mOnItemLongClickListener != null) {
RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
return mOnItemLongClickListener.onItemLongClicked(mRecyclerView, holder.getAdapterPosition(), v);
}
return false;
}
};
private RecyclerView.OnChildAttachStateChangeListener mAttachListener
= new RecyclerView.OnChildAttachStateChangeListener() {
@Override
public void onChildViewAttachedToWindow(View view) {
if (mOnItemClickListener != null) {
view.setOnClickListener(mOnClickListener);
}
if (mOnItemLongClickListener != null) {
view.setOnLongClickListener(mOnLongClickListener);
}
}
@Override
public void onChildViewDetachedFromWindow(View view) {}
};
private ItemClickSupport(RecyclerView recyclerView) {
mRecyclerView = recyclerView;
mRecyclerView.setTag(R.id.item_click_support, this);
mRecyclerView.addOnChildAttachStateChangeListener(mAttachListener);
}
public static ItemClickSupport addTo(RecyclerView view) {
ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support);
if (support == null) {
support = new ItemClickSupport(view);
}
return support;
}
public static ItemClickSupport removeFrom(RecyclerView view) {
ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support);
if (support != null) {
support.detach(view);
}
return support;
}
public ItemClickSupport setOnItemClickListener(OnItemClickListener listener) {
mOnItemClickListener = listener;
return this;
}
public ItemClickSupport setOnItemLongClickListener(OnItemLongClickListener listener) {
mOnItemLongClickListener = listener;
return this;
}
private void detach(RecyclerView view) {
view.removeOnChildAttachStateChangeListener(mAttachListener);
view.setTag(R.id.item_click_support, null);
}
public interface OnItemClickListener {
void onItemClicked(RecyclerView recyclerView, int position, View v);
}
public interface OnItemLongClickListener {
boolean onItemLongClicked(RecyclerView recyclerView, int position, View v);
}
}
上面的代碼中給 RecyclerView 設(shè)置了 OnChildAttachStateChangeListener 事件監(jiān)聽,當(dāng)子 View attach RecyclerView 時設(shè)置事件監(jiān)聽开缎。為了使代碼獨(dú)立簡潔，可以寫在單獨(dú)的類中林螃，無論是監(jiān)聽 ItemView 還是ItemView 中每個子 View 的點(diǎn)擊事件奕删。
出自；http://www.littlerobots.nl/blog/Handle-Android-RecyclerView-Clicks/
最后疗认，歡迎大家吐槽完残，共同進(jìn)步，謝謝横漏。
