我已经在 cardviewactivity 中实现了 cardview 溢出菜单，但不知道如何在 fragment 中使用它
我有选项卡 View 和选项卡 fragment ，现在每个 fragment 都在访问 cardview-list view-activity。
这是我试图实现的屏幕截图:
问题:我无法获得每个 cardview 列表项的溢出菜单。应用已停止。
卡片 View xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/white">
<android.support.v7.widget.CardView
android:id="@+id/card_view"
android:layout_gravity="center"
android:layout_width="fill_parent"
android:layout_height="80dp"
android:layout_margin="5dp"
card_view:cardCornerRadius="2dp"
card_view:contentPadding="10dp"
android:foreground="?android:attr/selectableItemBackground">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textStyle="bold"
android:layout_alignParentTop="true"/>
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_below="@+id/textView"/>
-----> <ImageButton
android:id="@+id/img_menu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/ic_action_navigation_more_vert"
android:layout_alignParentRight="true"
android:layout_marginTop="12dp"
android:onClick="showPopup"/>
</RelativeLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
我的回收器 View 适配器
public class MyRecyclerViewAdapter extends RecyclerView
.Adapter<MyRecyclerViewAdapter
.DataObjectHolder> {
private static String LOG_TAG = "MyRecyclerViewAdapter";
private ArrayList<DataObject> mDataset;
private static MyClickListener myClickListener;
Context mContext = null;
public static class DataObjectHolder extends RecyclerView.ViewHolder{
/* implements View
.OnClickListener {*/
TextView label;
TextView dateTime;
ImageButton overflowMenu;
public View overflow;
public DataObjectHolder(View itemView) {
super(itemView);
label = (TextView) itemView.findViewById(R.id.textView);
dateTime = (TextView) itemView.findViewById(R.id.textView2);
overflowMenu = (ImageButton) itemView.findViewById(R.id.img_menu);
Log.i(LOG_TAG, "Adding Listener");
// itemView.setOnClickListener(this);
// overflowMenu.setOnClickListener(this);
}
/* @Override
public void onClick(View v) {
*//* myClickListener.onItemClick(getAdapterPosition(), v);
Toast.makeText(getAdapterPosition(), "STRING MESSAGE", Toast.LENGTH_LONG).show();*//*
}*/
}
public void setOnItemClickListener(MyClickListener myClickListener) {
this.myClickListener = myClickListener;
}
public MyRecyclerViewAdapter(ArrayList<DataObject> myDataset) {
mDataset = myDataset;
}
@Override
public DataObjectHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.card_view_row, parent, false);
DataObjectHolder dataObjectHolder = new DataObjectHolder(view);
return dataObjectHolder;
}
@Override
public void onBindViewHolder(DataObjectHolder holder, int position) {
holder.label.setText(mDataset.get(position).getmText1());
holder.dateTime.setText(mDataset.get(position).getmText2());
holder.overflowMenu.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
PopupMenu popup = new PopupMenu(mContext, view);
MenuInflater inflater = popup.getMenuInflater();
inflater.inflate(R.menu.card_overflow_menu, popup.getMenu());
popup.setOnMenuItemClickListener(new MyMenuItemClickListener());
popup.show();
}
});
}
public void addItem(DataObject dataObj, int index) {
mDataset.add(index, dataObj);
notifyItemInserted(index);
}
public void deleteItem(int index) {
mDataset.remove(index);
notifyItemRemoved(index);
}
@Override
public int getItemCount() {
return mDataset.size();
}
public interface MyClickListener {
public void onItemClick(int position, View v);
}
private class MyMenuItemClickListener implements PopupMenu.OnMenuItemClickListener {
public MyMenuItemClickListener() {
}
@Override
public boolean onMenuItemClick(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.one:
Toast.makeText(mContext, "Action 1", Toast.LENGTH_SHORT).show();
return true;
case R.id.two:
Toast.makeText(mContext, "Action 2", Toast.LENGTH_SHORT).show();
return true;
default:
}
return false;
}
}
}
我在其中调用溢出菜单的 fragment
private RecyclerView mRecyclerView;
private RecyclerView.Adapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
private static String LOG_TAG = "CardViewActivity";
ImageButton overflowMenu;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// return inflater.inflate(R.layout.activity_card_view, null);
View rootView = inflater.inflate(R.layout.activity_card_view, container, false);
overflowMenu = (ImageButton) rootView.findViewById(R.id.img_menu);
mRecyclerView = (RecyclerView) rootView.findViewById(R.id.my_recycler_view);
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(getActivity());
mRecyclerView.setLayoutManager(mLayoutManager);
mAdapter = new MyRecyclerViewAdapter(getDataSet());
mRecyclerView.setAdapter(mAdapter);
return rootView;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.card_overflow_menu, menu);
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.one:
Toast.makeText(getContext(), " Clicked 1 ", Toast.LENGTH_LONG).show();
return true;
case R.id.two:
Toast.makeText(getContext(), "Clicked 2 ", Toast.LENGTH_LONG).show();
return true;
default:
break;
}
return false;
}
/* public void showPopup(View v) {
PopupMenu popup = new PopupMenu(getActivity(), v);
MenuInflater inflater = popup.getMenuInflater();
inflater.inflate(R.menu.card_overflow_menu, popup.getMenu());
popup.show();
popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
switch (item.getItemId()) {
case R.id.one:
//Or Some other code you want to put here.. This is just an example.
Toast.makeText(getActivity(), " Clicked 1 " + " : ", Toast.LENGTH_LONG).show();
break;
case R.id.two:
Toast.makeText(getActivity(), "Clicked 2 " + " : ", Toast.LENGTH_LONG).show();
break;
default:
break;
}
return true;
}
});
}*/
private ArrayList<DataObject> getDataSet() {
ArrayList results = new ArrayList<DataObject>();
for (int index = 0; index < 20; index++) {
DataObject obj = new DataObject("Test " + index,
"Doc number " + index);
results.add(index, obj);
}
return results;
}
}
我遇到的错误:
java.lang.IllegalStateException: Could not find method showPopup(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatImageButton with id 'img_menu'
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:325)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:284)
at android.view.View.performClick(View.java:4802)
at android.view.View$PerformClick.run(View.java:20101)
at android.os.Handler.handleCallback(Handler.java:810)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:189)
at android.app.ActivityThread.main(ActivityThread.java:5532)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:950)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745)
最佳答案
如果您想在列表中为 CardView 创建溢出菜单，您应该在 RecyclerView 适配器本身中创建它。
这是代码
viewHolder.overflow.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
PopupMenu popup = new PopupMenu(mContext, view);
MenuInflater inflater = popup.getMenuInflater();
inflater.inflate(R.menu.menu_action, popup.getMenu());
popup.setOnMenuItemClickListener(new MyMenuItemClickListener());
popup.show();
}
});
overflow 是 CardView 中的图像图标，viewHolder 是 ViewHolder 类的对象。现在为上下文或溢出菜单创建点击事件。
class MyMenuItemClickListener implements PopupMenu.OnMenuItemClickListener {
public MyMenuItemClickListener() {
}
@Override
public boolean onMenuItemClick(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.action_first:
Toast.makeText(mContext, "Action 1", Toast.LENGTH_SHORT).show();
return true;
case R.id.action_second:
Toast.makeText(mContext, "Action 2", Toast.LENGTH_SHORT).show();
return true;
default:
}
return false;
}
}
并且您必须为上下文菜单创建一个单独的 Menu 资源文件。
改变这个
public MyRecyclerViewAdapter(ArrayList<DataObject> myDataset) {
mDataset = myDataset;
}
到
public MyRecyclerViewAdapter(Context context, ArrayList<DataObject> myDataset) {
mContext = context;
mDataset = myDataset;
}
关于android - fragment 中的 cardview 溢出菜单，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37851828/