以下是我为此编写的课程
我创建了自定义菜单，并在 cardview 工具栏上应用了该菜单（即垂直 3 个点）我不知道问题出在哪里下拉菜单的对齐方式已更改，我现在无法修复它
具有所有功能的产品适配器类如下：
public class ProdAdapter extends BaseAdapter {
private PopupMenu mPopupMenu;
Context context;
ArrayList<Model> models;
public ProdAdapter(Context context, ArrayList<Model> models) {
this.context = context;
this.models = models;
}
@Override
public int getCount() {
return models.size();
}
@Override
public Object getItem(int i) {
return models.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
if(view == null){
view = View.inflate(context, R.layout.list_items,null);
}
ImageView images = (ImageView) view.findViewById(R.id.prodpic);
TextView prodname = (TextView) view.findViewById(R.id.prodname);
TextView prodbrand = (TextView) view.findViewById(R.id.prodbrand);
TextView prodprice = (TextView) view.findViewById(R.id.prodprice);
TextView prodstatus = (TextView) view.findViewById(R.id.status);
Toolbar prodmenu = (Toolbar) view.findViewById(R.id.prodmenu);
mPopupMenu = new PopupMenu(context, prodmenu);
MenuInflater menuInflater = mPopupMenu.getMenuInflater();
menuInflater.inflate(R.menu.product_menu, mPopupMenu.getMenu());
//mPopupMenu.inflate(R.menu.product_menu);
prodmenu.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mPopupMenu.show();
}
});
mPopupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem menuItem) {
int id = menuItem.getItemId();
if (id == R.id.action_edit) {
//Intent intent = new Intent(MainActivity.this,SettingsActivity.class);
//startActivity(intent);
return true;
}
if (id == R.id.action_delete) {
//Intent intent = new Intent(MainActivity.this,SettingsActivity.class);
//startActivity(intent);
return true;
}
return true;
}
});
Model model = models.get(i);
images.setImageResource(model.getProd_img());
prodname.setText(model.getProd_name());
prodbrand.setText(model.getProd_brand());
prodprice.setText(model.getProd_price());
prodstatus.setText(model.getProd_status());
return view;
}
}
prod_menu.xml 下的菜单文件
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/action_edit"
android:orderInCategory="100"
android:title="Edit"
app:showAsAction="never" />
<item
android:id="@+id/action_delete"
android:orderInCategory="100"
android:title="Delete"
app:showAsAction="never" />
</menu>
list_items.xml 下方的卡片视图布局
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="@+id/card_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
card_view:cardUseCompatPadding="true"
android:layout_marginBottom="16dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:paddingBottom="4dp">
<ImageView
android:id="@+id/prodpic"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="10dp"
android:layout_marginStart="10dp"
android:layout_marginTop="5dp"
card_view:srcCompat="@mipmap/dd_logo" />
<android.support.v7.widget.Toolbar
android:id="@+id/prodmenu"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/prodname"
android:layout_marginRight="10dp"
android:background="@drawable/dots" />
<TextView
android:id="@+id/prodname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:layout_toEndOf="@+id/prodpic"
android:layout_toLeftOf="@+id/prodmenu"
android:layout_toRightOf="@+id/prodpic"
android:layout_toStartOf="@+id/prodmenu"
android:fontFamily="sans-serif-condensed"
android:text="Product Name"
android:textColor="#000"
android:textStyle="bold"
android:typeface="normal" />
<TextView
android:id="@+id/prodbrand"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/prodname"
android:layout_alignStart="@+id/prodname"
android:layout_below="@+id/prodname"
android:layout_marginTop="10dp"
android:layout_toLeftOf="@+id/prodmenu"
android:layout_toStartOf="@+id/prodmenu"
android:fontFamily="sans-serif-condensed"
android:text="Product Brand"
android:textColor="#000"
android:typeface="normal" />
<TextView
android:id="@+id/prodprice"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView4"
android:layout_alignBottom="@+id/textView4"
android:layout_toEndOf="@+id/textView4"
android:layout_toRightOf="@+id/textView4"
android:fontFamily="sans-serif-condensed"
android:paddingLeft="5dp"
android:text="Product Price"
android:textColor="@color/colorAccent"
android:typeface="normal" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/prodbrand"
android:layout_alignStart="@+id/prodbrand"
android:layout_below="@+id/prodbrand"
android:layout_marginTop="10dp"
android:fontFamily="sans-serif-condensed"
android:text="PKR"
android:textColor="@color/colorAccent"
android:typeface="normal" />
<TextView
android:id="@+id/status"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignEnd="@+id/prodmenu"
android:layout_alignParentBottom="true"
android:layout_alignRight="@+id/prodmenu"
android:fontFamily="sans-serif-condensed"
android:text="Status"
android:textColor="@color/cardview_dark_background"
android:typeface="normal" />
</RelativeLayout>
</android.support.v7.widget.CardView>
当前代码将菜单附加到 listView 的视图组根。您的弹出菜单需要在单击列表项时调用，以 listItem 视图作为锚点。
public void showMenu(View v) {
PopupMenu popup = new PopupMenu(this, v);
// This activity implements OnMenuItemClickListener
popup.setOnMenuItemClickListener(this);
popup.inflate(R.menu.actions);
popup.show();
}
请参阅创建弹出菜单
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