使回收者视图在卡片视图内可点击

Question

  <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:id="@+id/home_subscribe_card"
    android:layout_width="match_parent"
    android:layout_height="72dp"
    android:onClick="@{vm.onGoalPress}"
    card_view:cardCornerRadius="4dp">

<android.support.v7.widget.RecyclerView
                android:id="@+id/feeds_list"
                android:layout_width="200dp"
                android:layout_height="30dp"
                android:layout_marginTop="6dp" />

</CardView>

Click 上的卡片视图可以正常工作。但是回收站视图的区域不可点击。如何让它可以被点击，从而捕捉到卡片查看的事件。

Answer 1

对于 recylerview，您需要设置适配器顺序以像列表视图一样使用可点击。您可以参考以下 link : https://developer.android.com/training/material/lists-cards.html 您可以在这里查看另一个问题：Why doesn't RecyclerView have onItemClickListener()? And how RecyclerView is different from Listview?

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.my_activity);
    mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);

    // use this setting to improve performance if you know that changes
    // in content do not change the layout size of the RecyclerView
    mRecyclerView.setHasFixedSize(true);

    // use a linear layout manager
    mLayoutManager = new LinearLayoutManager(this);
    mRecyclerView.setLayoutManager(mLayoutManager);

    // specify an adapter (see also next example)
    mAdapter = new MyAdapter(myDataset);
    mRecyclerView.setAdapter(mAdapter);
}
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private String[] mDataset;

// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class ViewHolder extends RecyclerView.ViewHolder {
    // each data item is just a string in this case
    public TextView mTextView;
    public ViewHolder(TextView v) {
        super(v);
        mTextView = v;
    }
}

// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(String[] myDataset) {
    mDataset = myDataset;
}

// Create new views (invoked by the layout manager)
@Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
                                               int viewType) {
    // create a new view
    View v = LayoutInflater.from(parent.getContext())
                           .inflate(R.layout.my_text_view, parent, false);
    // set the view's size, margins, paddings and layout parameters
    ...
    ViewHolder vh = new ViewHolder(v);
    return vh;
}

// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    // - get element from your dataset at this position
    // - replace the contents of the view with that element
    holder.mTextView.setText(mDataset[position]);

}

// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
    return mDataset.length;
}

}

//像这样 //holder.mTextView.setOnClickListener(onClick);

Answer 2

您需要在 recyclerview Adapter 的 viewholder 中设置点击监听器。在 Viewholder 中，您可以访问每个视图的所有元素，recyclerview 扩展的 layoyt 的 Viewgroup。我希望这是有道理的。

或者，您可以在 onBind() 方法中设置 onclick 侦听器。

你可以看看this question

如果您的卡片视图在回收站视图之外，则无法直接访问它。使用回调或事件总线从你的回收者视图到你正在膨胀你的卡片视图的activity /片段，然后用新值更新你的卡片视图

Answer 3

public class InterceptTouchCardView extends CardView {

public InterceptTouchCardView(Context context) {
    super(context);
}

public InterceptTouchCardView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public InterceptTouchCardView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
}

/**
 * Intercept touch event so that inner views cannot receive it.
 * 
 * If a ViewGroup contains a RecyclerView and has an OnTouchListener or something like that,
 * touch events will be directly delivered to inner RecyclerView and handled by it. As a result, 
 * parent ViewGroup won't receive the touch event any longer.
 */
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    return true;
}

}

Answer 4

当 RecyclerView 的项目本身有一些可点击的视图（即按钮）时，InterceptTouchCardView 的解决方案有问题。这些可点击的视图将永远不会收到任何触摸事件。更好的解决方案是扩展 RecyclerView 并覆盖其 onInterceptTouchEvent 和 onTouchEvent，因此它们都只是 return false，就像这样（Kotlin 语法）：

class ClickThroughRecyclerView : RecyclerView {

    constructor(context: Context) : super(context)

    constructor(context: Context, attr: AttributeSet?) : super(context, attr)

    constructor(context: Context, attr: AttributeSet?, defStyle: Int) : super(context, attr, defStyle)

    override fun onInterceptTouchEvent(e: MotionEvent): Boolean {
        return false
    }

    override fun onTouchEvent(e: MotionEvent): Boolean {
        return false
    }

}

通过在布局文件中使用 ClickThroughRecyclerView 可确保未被 RecyclerView 的项目（如按钮等）消耗的触摸事件传播到 RecyclerView的父视图。

使回收者视图在卡片视图内可点击

Make recycler view clickable inside a card view

android

android-layout

android-viewgroup

android-recyclerview