项目单击 RecyclerView 时不显示吐司 [英] No toast shown when item clicked RecyclerView
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问题描述
好的，我知道，可能有人已经问过这个问题了.我已经在 此链接 上找到了解决问题的可能方法.但是，由于未知原因，该解决方案对我不起作用.我想在 RecyclerView 内单击项目(CardView)时显示 Toast.此 Toast 必须向我显示所单击项目的位置.当我点击 CardView 时，我看到了波纹——这意味着卡片被点击了——但不幸的是，我没有看到任何 toast.有人可以解释我为什么吗?提前致谢.
Ok, I know, probably someone has already asked this question. I have already found a possible solution for my problem on this link. But, for an unknown reason, that solution doesn't work for me.
I want to display a Toast when an item (a CardView) is clicked inside a RecyclerView. This Toast must show me the position of the item clicked.
When I click on a CardView I see the ripple - so that means that the card is clicked - but unfortunately, I don't see any toast. Can someone explain me why? Thanks in advance.
这是我的适配器:
public class MainRecyclerViewAdapter extends RecyclerView.Adapter<MainRecyclerViewAdapter.MyMainViewHolder> {
private List<Information> mainInfo;
MyDatabase myDatabase;
public MainRecyclerViewAdapter(List<Information> mainInfo) {
this.mainInfo = mainInfo;
}
public static class MyMainViewHolder extends RecyclerView.ViewHolder {
TextView titleTextView, notesTextView, dateTextView, timeTextView;
ImageView imageView;
LinearLayout linearLayout;
public MyMainViewHolder(View itemView) {
super(itemView);
linearLayout = (LinearLayout) itemView.findViewById(R.id.mainLayout);
imageView = (ImageView) itemView.findViewById(R.id.imgIcon);
titleTextView = (TextView) itemView.findViewById(R.id.title_TextView);
notesTextView = (TextView) itemView.findViewById(R.id.notes_TextView);
dateTextView = (TextView) itemView.findViewById(R.id.date_TextView);
timeTextView = (TextView) itemView.findViewById(R.id.time_TextView);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(v.getContext(), "Position: " + Integer.toString(getAdapterPosition()), Toast.LENGTH_LONG).show();
}
});
}
}
@Override
public MyMainViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.main_single_raw, parent, false);
MyMainViewHolder holder = new MyMainViewHolder(v);
return holder;
}
public void delete(int position){
mainInfo.remove(position);
notifyItemRemoved(position);
}
@Override
public void onBindViewHolder(final MyMainViewHolder holder, final int position) {
holder.imageView.setImageResource(mainInfo.get(position).getICON_ID());
holder.titleTextView.setText(mainInfo.get(position).getTITLE());
holder.notesTextView.setText(mainInfo.get(position).getNOTES());
holder.dateTextView.setText(mainInfo.get(position).getDATE());
holder.timeTextView.setText(mainInfo.get(position).getTIME());
}
@Override
public int getItemCount() {
return mainInfo.size();
}}
这是我的cardView的布局文件:
This is the layout file of my cardView:
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/card_view1"
android:clickable="true"
android:layout_width="match_parent"
android:layout_height="match_parent"
card_view:cardCornerRadius="3dp"
android:layout_margin="5dp">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mainLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="0.5dp"
android:clickable="true"
android:background="?android:selectableItemBackground"
android:orientation="horizontal"
android:weightSum="10">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_marginLeft="16dp"
android:layout_weight="8.5">
<TextView
android:id="@+id/title_TextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="0dp"
android:layout_marginRight="8dp"
android:layout_marginTop="5dp"
android:text="Title"
android:fontFamily="sans-serif-light"
android:textColor="#F57C00"
android:textSize="25sp"
/>
</RelativeLayout>
<View
android:layout_width="fill_parent"
android:id="@+id/divider1"
android:layout_height="0.1dp"
android:layout_below="@+id/title_TextView"
android:background="@android:color/darker_gray"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_marginLeft="16dp"
android:layout_weight="8.5">
<ImageView
android:id="@+id/imgIcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:src="@mipmap/ic_alarm_check_grey600_48dp" />
</RelativeLayout>
<LinearLayout
android:id="@+id/linear"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1.5"
android:orientation="vertical">
<TextView
android:id="@+id/notes_TextView"
android:paddingTop="5dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="8dp"
android:text="notes"
android:textColor="#ff565656"
android:textSize="12sp" />
<TextView
android:id="@+id/date_TextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="8dp"
android:text="date"
android:textColor="#ff565656"
android:textSize="12sp" />
<TextView
android:id="@+id/time_TextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="8dp"
android:text="time"
android:textColor="#ff565656"
android:textSize="12sp" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</LinearLayout>
推荐答案
问题解决了！这是工作代码:
Problem solved! This is the working code:
public static class MyMainViewHolder extends RecyclerView.ViewHolder {
TextView titleTextView, notesTextView, dateTextView, timeTextView;
ImageView imageView;
LinearLayout linearLayout;
public MyMainViewHolder(final View itemView) {
super(itemView);
linearLayout = (LinearLayout) itemView.findViewById(R.id.mainLayout);
imageView = (ImageView) itemView.findViewById(R.id.imgIcon);
titleTextView = (TextView) itemView.findViewById(R.id.title_TextView);
notesTextView = (TextView) itemView.findViewById(R.id.notes_TextView);
dateTextView = (TextView) itemView.findViewById(R.id.date_TextView);
timeTextView = (TextView) itemView.findViewById(R.id.time_TextView);
itemView.setClickable(true);
itemView.setFocusableInTouchMode(true);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(itemView.getContext(), "Position: " + Integer.toString(getAdapterPosition()), Toast.LENGTH_LONG).show();
}
});
linearLayout.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
Toast.makeText(itemView.getContext(), "Position: " + Integer.toString(getAdapterPosition()), Toast.LENGTH_LONG).show();
}
});
}
}
所以现在，如果我点击 linearLayout - 所以点击整个 cardView - 我会看到它的位置！
So now, if i click on the linearLayout - so on the entire cardView - I see its position!
致谢:链接
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