我有一个回收站视图，我想首先检查一个条件，然后在回收站视图中显示该项目。所以我尝试设置VIew.visibility（已消失），但它留下了空格，值很好。但后来我尝试在视野中设置高度的参数，这被证明是一场灾难，现在我的屏幕上什么都没有出现。 以下是我所做的事情
在我的onCreateView中我调用片段放置自动完成
autocompleteFragment.setOnPlaceSelectedListener
(new PlaceSelectionListener() {
@Override
public void onPlaceSelected(Place place) {
myPosition = null;
Toast.makeText(getContext(),place.getAddress(),
Toast.LENGTH_LONG).show();
Double latitude1 = place.getLatLng().latitude;
Double longitude1 =place.getLatLng().longitude;
LatLng latLng = new LatLng(latitude1,longitude1);
myPosition = latLng;
filterResults(myPosition); //this i s for geoquery
}
private Map<String, GeoLocation> UIDLocation = new HashMap<>();
public void filterResults(LatLng latLng){
DatabaseReference ref =
FirebaseDatabase.getInstance().getReference().child("Location");
GeoFire geoFire = new GeoFire(ref);
GeoQuery geoQuery = geoFire.queryAtLocation(new
GeoLocation(latLng.latitude, latLng.longitude), 2);
geoQuery.addGeoQueryEventListener(new GeoQueryEventListener() {
@Override
public void onKeyEntered(String key, GeoLocation location) {
UIDLocation.put(key,location);
}
// further methods of geoquery event listenere i havent changed
anything in them -----
------ public void onGeoQueryError(DatabaseError error) {
}
});
filterlocation(); // this method call the firebase adapter
}
public static class UsersViewHolder extends RecyclerView.ViewHolder {
View mView;
public UsersViewHolder(View itemView) {
super(itemView);
mView = itemView;
}
public void show(){
mView.setVisibility(View.VISIBLE);
mView.setLayoutParams(new
ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT));
}
public void hide(){
mView.setVisibility(View.GONE);
mView.setLayoutParams(new ViewGroup.LayoutParams(0,0));
}
/*
public void setLayoutParams(ViewGroup.LayoutParams layoutParams)
{
mView.setLayoutParams(layoutParams);
}
*/
TextView userNameView;
public void setDisplayName(String name)
{
userNameView = (TextView) mView.findViewById(R.id.search_name);
userNameView.setText(name);
}
TextView userCategory;
public void setUserCategory(String name)
{
userCategory = (TextView) mView.findViewById(R.id.search_category);
userCategory.setText(name);
}
TextView userLocation;
public void setUserLocation(String name)
{
userLocation = (TextView) mView.findViewById(R.id.search_location);
userLocation.setText(name);
}
TextView userStatusView;
public void setUserStatus(String status)
{
userStatusView = (TextView)
mView.findViewById(R.id.search_category);
userStatusView.setText(status);
}
public void setTypeFace(Typeface t){
userNameView.setTypeface(t);
}
}
我的OnBinViewHolder方法是
protected void onBindViewHolder(final UsersViewHolder holder, int
position, final Users model) {
GeoLocation g = UIDLocation.get(model.getLocationID());
if (g != null)
{
holder.show();
holder.setLayoutParams();
Toast.makeText(getContext(), "added",
Toast.LENGTH_SHORT).show();
Log.d("added", "onBindViewHolder: ");
}
else{
holder.hide();
Toast.makeText(getContext(), "not Addded",
Toast.LENGTH_SHORT).show();
Log.d("not added", "onBindViewHolder: ");
holder.setLayoutParamszero();
}
holder.setDisplayName(model.getName());
String image = model.getThumb_image();
holder.setUserImage(image, getContext());
holder.setTypeFace(typeface);
holder.setUserCategory(model.getSubcategory());
holder.setUserLocation(model.getLocation());
holder.mView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(getContext(), model.getName(),
Toast.LENGTH_SHORT).show();
}
});
}
我的布局文件
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/search_result_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?android:selectableItemBackground">
<TextView
android:id="@+id/search_location"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignStart="@+id/search_name"
android:layout_below="@+id/user_single_online_icon"
android:layout_marginBottom="3dp"
android:layout_marginTop="3dp"
android:text="Location" />
<ImageView
android:id="@+id/user_single_online_icon"
android:layout_width="8dp"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/search_name"
android:layout_marginLeft="10dp"
android:layout_toEndOf="@+id/search_name"
android:visibility="invisible"
app:srcCompat="@drawable/online_icon" />
<ImageView
android:id="@+id/search_user_single_image"
android:layout_width="64dp"
android:layout_height="64dp"
android:layout_marginBottom="15dp"
android:layout_marginLeft="15dp"
android:layout_marginTop="15dp"
android:src="@drawable/default_avatar" />
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/nextbtn1"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignParentEnd="true"
android:layout_centerVertical="true"
android:src="@drawable/ic_navigate_next_black_24dp" />
<TextView
android:id="@+id/search_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/search_user_single_image"
android:layout_marginStart="20dp"
android:layout_toEndOf="@+id/search_user_single_image"
android:text="Display Name"
android:textColor="@android:color/black"
android:textSize="18sp" />
<TextView
android:id="@+id/search_category"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignStart="@+id/search_name"
android:layout_below="@+id/search_name"
android:layout_marginBottom="3dp"
android:layout_marginTop="3dp"
android:text="Category" />
</RelativeLayout>
view.hide工作正常没有参数并显示值但是当我在视图上应用参数时，值在每种情况下都完全消失了