因此，基本上在这个用户可以动态添加图像和图像上传到firebase也。此外，在这个有2个片段，所以在mysnapfragment用户可以添加图像，也可以看到图像。但是当点击指定的按钮时，所有上传的图片也应该显示在一个片段中。我怎么能做到这一点？任何帮助都是非常值得赞赏的。所以基本上我想更新的图像显示时，在snapfragment按钮被点击。
这是我的snapfragmen.xml代码
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".aMySnapFragment"
android:background="@drawable/gradient">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="341dp"
android:layout_height="38dp"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginEnd="38dp"
android:layout_marginBottom="544dp"
android:text=" CALLIGRAPHY DOODLE SNAPS"
android:textColor="@color/black"
android:textSize="20sp" />
<Button
android:id="@+id/user_btn"
android:layout_width="338dp"
android:layout_height="88dp"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginHorizontal="20dp"
android:layout_marginEnd="13dp"
android:layout_marginBottom="184dp"
android:background="@color/LightBlue"
android:text="SHOW ALL CALLIGRAPHY SNAPS"
android:textColor="@color/black"
android:textSize="25dp" />
</RelativeLayout>这是我的mysnapfragment.xml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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MySnapFragment"
android:background="@drawable/gradient">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="341dp"
android:layout_height="38dp"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginEnd="38dp"
android:layout_marginBottom="544dp"
android:text=" CALLIGRAPHY DOODLE SNAPS"
android:textColor="@color/black"
android:textSize="20sp" />
<ImageView
android:id="@+id/imageView"
android:layout_width="match_parent"
android:layout_height="245dp"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginEnd="2dp"
android:layout_marginBottom="267dp"
android:src="@drawable/ic_baseline_add_photo_alternate_24" />
<Button
android:id="@+id/upload_btn"
android:layout_width="304dp"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginHorizontal="20dp"
android:layout_marginEnd="23dp"
android:layout_marginBottom="142dp"
android:background="@color/LightBlue"
android:text="UPLOAD"
android:textColor="@color/black"
android:textSize="20dp" />
<Button
android:id="@+id/showall_btn"
android:layout_width="304dp"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginHorizontal="20dp"
android:layout_marginEnd="23dp"
android:layout_marginBottom="53dp"
android:background="@color/purple_200"
android:text="SHOW ALL"
android:textColor="@color/black"
android:textSize="20dp" />
<ProgressBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:visibility="invisible"
android:layout_marginEnd="153dp"
android:layout_marginBottom="211dp" />
</RelativeLayout>这是我的myadapter.java文件
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private ArrayList<Model> mList;
private Context context;
public MyAdapter(Context context , ArrayList<Model> mList){
this.context = context;
this.mList = mList;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(context).inflate(R.layout.item , parent ,false);
return new MyViewHolder(v);
}
@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
Glide.with(context).load(mList.get(position).getImageUrl()).into(holder.imageView);
}
@Override
public int getItemCount() {
return mList.size();
}
public static class MyViewHolder extends RecyclerView.ViewHolder{
ImageView imageView;
public MyViewHolder(@NonNull View itemView) {
super(itemView);
imageView = itemView.findViewById(R.id.m_image);
}
}
}这是我的showactivity.java文件
public class ShowActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private ArrayList<Model> list;
private MyAdapter adapter;
private DatabaseReference root = FirebaseDatabase.getInstance().getReference("Image");
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_show);
recyclerView = findViewById(R.id.recyclerview);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
list = new ArrayList<>();
adapter = new MyAdapter(this , list);
recyclerView.setAdapter(adapter);
root.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot snapshot) {
for (DataSnapshot dataSnapshot : snapshot.getChildren()){
Model model = dataSnapshot.getValue(Model.class);
list.add(model);
}
adapter.notifyDataSetChanged();
}
@Override
public void onCancelled(@NonNull DatabaseError error) {
}
});
}
}
this is my item.xml code
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="250dp"
android:layout_margin="20dp"
android:elevation="10dp">
<ImageView
android:id="@+id/m_image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
/>
</androidx.cardview.widget.CardView>
暂无答案！
目前还没有任何答案，快来回答吧！