Android setVisibility 不适用于某些逻辑答案

【问题标题】：Android setVisibility does not work on some logicAndroid setVisibility 不适用于某些逻辑
【发布时间】：2019-06-08 04:21:09
【问题描述】：

只是简单介绍一下我在做什么。

我根据用户登录的帐户类型授予不同的功能。

将通过 Firebase 参考从 Firebase 数据库检索用户的帐户类型。如果您查看此图像，则会显示箭头。那是显示帐户类型的地方，但考虑到 UI，我已将文本视图的可见性设置为“消失”。我已经验证了数据库参考代码在我将文本视图的可见性设置为可见时工作，然后我运行应用程序，文本视图将相应地更改为管理员或本地用户。

问题在于我的 setVisibility 'if else' 逻辑。它不相应地工作。附件是我测试过的场景列表及其结果。

我尝试在我的铅笔图标上添加“已消失”的可见性，并使用 VISIBILE/INVISIBLE/GONE 而没有前面的视图（就像许多人在几个类似帖子中所说的解决方案一样），但是当我尝试也就是说，该图标对于所有 8 种情况都是不可见。

因此，我不确定我还应该做些什么来克服这个问题。非常感谢任何帮助。

更新 #1：按要求添加代码

class SearchViewHolder extends RecyclerView.ViewHolder {

public TextView keyword, description, acronym, relatedkeyword1, 
relatedkeyword2, relatedkeyword3, tv_rules_read_more;
public ImageView iv_rules;

public SearchViewHolder(@NonNull View itemView) {
    super(itemView);

    //knowledge feature
    keyword = itemView.findViewById(R.id.keyword);
    acronym = itemView.findViewById(R.id.acronym);
    tv_rules_read_more = itemView.findViewById(R.id.tv_rules_read_more);
    iv_rules = itemView.findViewById(R.id.iv_rules);
}
}

public class SearchAdapter extends RecyclerView.Adapter<SearchViewHolder> 
implements SectionIndexer {

//    private Context context;
private List<Knowledge> knowledge;
private ArrayList<Integer> mSectionPositions;
Activity activity;
String positionUpdated;

private FirebaseAuth firebaseAuth;
private FirebaseDatabase firebaseDatabase;

public SearchAdapter(Activity activity, List<Knowledge> knowledge, String 
positionUpdated) {
    //this.context = context;
    this.knowledge = knowledge;
    this.activity = activity;
    this.positionUpdated = positionUpdated;
}

@NonNull
@Override
public SearchViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int 
viewType) {
    LayoutInflater inflater = LayoutInflater.from(parent.getContext());
    View itemView = inflater.inflate(R.layout.layout_item, parent, false);
    return new SearchViewHolder(itemView);

}

@Override
public void onBindViewHolder(@NonNull SearchViewHolder holder, final int 
position) {

    holder.keyword.setText(knowledge.get(position).getKeyword());
    holder.acronym.setText(knowledge.get(position).getAcronym());
    holder.tv_rules_read_more.setOnClickListener(new 
View.OnClickListener() {
        @Override
        public void onClick(View view) {
            showDialog(position);
        }
    });
    if (positionUpdated != null && !positionUpdated.equals("")) {
        showDialog(Integer.parseInt(positionUpdated));
        positionUpdated = "";
    }

}

public void showDialog(final int position) {

    try {

        final Dialog dialog = new Dialog(activity);
        dialog.setContentView(R.layout.dialog_layout_item_rules);
        dialog.setCancelable(false);
        final TextView acctype, keyword1, description1, acronym1, 
        relatedkeyword4, relatedkeyword5, relatedkeyword6;
        //final TextView keyword1, description1, acronym1, 
        relatedkeyword4, relatedkeyword5, relatedkeyword6;
        ImageView iv_rules, iv_close_dialog, iv_edit_dialog;

        //rules feature
        acctype = dialog.findViewById(R.id.tvAccType);
        keyword1 = dialog.findViewById(R.id.keyword);
        acronym1 = dialog.findViewById(R.id.acronym);
        description1 = dialog.findViewById(R.id.description);
        relatedkeyword4 = dialog.findViewById(R.id.relatedKeyword1);
        relatedkeyword5 = dialog.findViewById(R.id.relatedKeyword2);
        relatedkeyword6 = dialog.findViewById(R.id.relatedKeyword3);
        iv_rules = dialog.findViewById(R.id.iv_rules);
        iv_close_dialog = dialog.findViewById(R.id.iv_close_dialog);
        iv_edit_dialog = dialog.findViewById(R.id.iv_edit_dialog);

        /////////
        firebaseAuth = FirebaseAuth.getInstance();
        firebaseDatabase = FirebaseDatabase.getInstance();

        DatabaseReference databaseReference = 
        firebaseDatabase.getReference(firebaseAuth.getUid());
        databaseReference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                UserProfile userProfile = 
        dataSnapshot.getValue(UserProfile.class);
                acctype.setText(userProfile.getUserDepartment());
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) 
       {
            }
        });

        if (acctype.getText().toString().equals("Administrator")){
            iv_edit_dialog.setVisibility(View.VISIBLE);
        }else {
            iv_edit_dialog.setVisibility(View.INVISIBLE);
        }
        ////////

        keyword1.setText(knowledge.get(position).getKeyword());
        description1.setText(knowledge.get(position).getDescription());
        acronym1.setText(knowledge.get(position).getAcronym());

relatedkeyword4.setText(knowledge.get(position).getRelatedkeyword1());

relatedkeyword5.setText(knowledge.get(position).getRelatedkeyword2());

relatedkeyword6.setText(knowledge.get(position).getRelatedkeyword3());
        byte[] bytesImage = knowledge.get(position).getImage();
        if (bytesImage != null && bytesImage.length > 0) {
            Bitmap bitmap = BitmapFactory.decodeByteArray(bytesImage, 0, 
bytesImage.length);
            iv_rules.setImageBitmap(bitmap);
            iv_rules.setVisibility(View.VISIBLE);
        } else {
            iv_rules.setVisibility(View.GONE);
        }

        dialog.show();
        dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);
        WindowManager.LayoutParams layoutParams = new 
WindowManager.LayoutParams();
        Window window = dialog.getWindow();
        layoutParams.copyFrom(window.getAttributes());
        layoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
        layoutParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
        window.setAttributes(layoutParams);

        iv_close_dialog.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                dialog.cancel();
            }
        });

        iv_edit_dialog.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(activity, 
AddNewKnowledgeActivity.class);
                intent.putExtra("id", 
String.valueOf(knowledge.get(position).getId()));
                intent.putExtra("position", String.valueOf(position));
                intent.putExtra("call_type", "update_rule");
                intent.putExtra("title", 
knowledge.get(position).getKeyword());
                intent.putExtra("code", 
knowledge.get(position).getAcronym());
                intent.putExtra("description", 
knowledge.get(position).getDescription());
                intent.putExtra("keyword1", 
knowledge.get(position).getRelatedkeyword1());
                intent.putExtra("keyword2", 
knowledge.get(position).getRelatedkeyword2());
                intent.putExtra("keyword3", 
knowledge.get(position).getRelatedkeyword3());
                intent.putExtra("bytesImage", 
knowledge.get(position).getImage());
                dialog.cancel();
                activity.startActivityForResult(intent, 101);
            }
        });
    } catch (Exception e) {

        e.printStackTrace();
    }
}

@Override
public int getItemCount() {
    return knowledge.size();
}


@Override
public int getSectionForPosition(int position) {
    return 0;
}

@Override
public Object[] getSections() {
    List<String> sections = new ArrayList<>(26);
    mSectionPositions = new ArrayList<>(26);
    for (int i = 0, size = knowledge.size(); i < size; i++) {
        String section = 
String.valueOf(knowledge.get(i).getKeyword().charAt(0)).toUpperCase();
        if (!sections.contains(section)) {
            sections.add(section);
            mSectionPositions.add(i);
        }
    }
    return sections.toArray(new String[0]);
}

@Override
public int getPositionForSection(int sectionIndex) {
    return mSectionPositions.get(sectionIndex);
}
}

更新 2：添加 XML 文件

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
app:cardBackgroundColor="#f5f0f0"
app:cardCornerRadius="10dp"
app:cardElevation="5dp">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="5dp"
    android:orientation="vertical">

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <ImageView
            android:id="@+id/iv_rules"
            android:layout_width="200dp"
            android:layout_height="120dp"
            android:layout_centerHorizontal="true"
            android:src="@color/deeppurpleColor"
            android:visibility="gone" />

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentStart="true"
            android:orientation="vertical">

            <ImageView
                android:id="@+id/iv_edit_dialog"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="@dimen/_5sdp"
                android:background="@android:drawable/ic_menu_edit"
                android:backgroundTint="@android:color/black"/>
        </LinearLayout>

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentEnd="true"
            android:orientation="vertical">

            <ImageView
                android:id="@+id/iv_close_dialog"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="@dimen/_5sdp"
                android:layout_alignParentRight="true"

android:background="@android:drawable/ic_menu_close_clear_cancel"
                android:backgroundTint="@android:color/black" />
        </LinearLayout>
    </RelativeLayout>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp">

        <TextView
            android:id="@+id/tvAccType"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Account Type"
            android:visibility="gone"/>

        <TextView
            android:id="@+id/keyword"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="5dp"
            android:gravity="center_vertical|start"
            android:text="Baggage Management Interface Device (BMID) 
Testing 123"
            android:textAllCaps="true"
            android:textColor="#000000"
            android:textSize="15dp"
            android:textStyle="bold" />

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

            <TextView
                android:id="@+id/codeHeader"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="10dp"
                android:layout_marginTop="5dp"
                android:gravity="center_vertical|start"
                android:text="Code:"
                android:textColor="#a8000000"
                android:textSize="13dp"
                android:textStyle="bold" />

            <TextView
                android:id="@+id/acronym"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_marginTop="5dp"
                android:gravity="center_vertical|start"
                android:text="GST"
                android:textColor="#a8000000"
                android:textSize="13dp"
                android:textStyle="italic" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

            <TextView
                android:id="@+id/ruleHeader"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="10dp"
                android:layout_marginTop="5dp"
                android:gravity="center_vertical|start"
                android:text="Desc:"
                android:textColor="#a8000000"
                android:textSize="13dp"
                android:textStyle="bold" />

            <TextView
                android:id="@+id/description"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_marginTop="5dp"
                android:gravity="center_vertical|start"
                android:scrollbars="vertical"
                android:text="If none are set then 'GST' is set to NULL"
                android:textColor="#a8000000"
                android:textSize="13dp" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

            <TextView
                android:id="@+id/relatedKeyword"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="10dp"
                android:layout_marginTop="5dp"
                android:gravity="center_vertical|start"
                android:text="Related Keyword:"
                android:textColor="#a8000000"
                android:textSize="12sp"
                android:textStyle="bold" />

            <TextView
                android:id="@+id/relatedKeyword1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_marginTop="5dp"
                android:clickable="true"
                android:text="Keyword 1,"
                android:textColor="#a8000000"
                android:textSize="12sp" />

            <TextView
                android:id="@+id/relatedKeyword2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_marginTop="5dp"
                android:clickable="true"
                android:text="Keyword 2,"
                android:textColor="#a8000000"
                android:textSize="12sp" />

            <TextView
                android:id="@+id/relatedKeyword3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_marginTop="5dp"
                android:clickable="true"
                android:text="Keyword 3"
                android:textColor="#a8000000"
                android:textSize="12sp" />

        </LinearLayout>
    </LinearLayout>
</LinearLayout>
</android.support.v7.widget.CardView>

【问题讨论】：

请提供一些代码以供查看。理论上一切看起来都很好。
最后一个场景让我有点失望，但您的 accType 文本视图似乎不包含正确的文本。你能看看这个，或者把咖啡的相关部分贴出来，让我们帮忙吗？特别是因为箭头所指的地方没有账户类型，听起来你真的错过了这部分
@Wijdan 我已经添加了我的代码，请检查
@Fred 我已经检查过我的 accType 确实包含从 firebase 数据库检索和引用的正确值。 setVisibility 消失了，因为我真的不希望文本本身出现在对话框中。
你在xml文件中设置了可见性属性吗？还要通过敬酒来确保您的条件有效。

标签： android android-layout android-view

【解决方案1】：

问题通过将 if/else 逻辑放在 onDataChange 方法中来解决！

逻辑没有相应地工作，因为我的 if/else 逻辑被放在循环之外。当 Firebase 检索然后显示值时，该逻辑应该起作用。

因此，而不是这些：

        DatabaseReference databaseReference = 
    firebaseDatabase.getReference(firebaseAuth.getUid());
    databaseReference.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
            UserProfile userProfile = 
    dataSnapshot.getValue(UserProfile.class);
            acctype.setText(userProfile.getUserDepartment());
        }

        @Override
        public void onCancelled(@NonNull DatabaseError databaseError) 
   {
        }
    });

    //note: these are outside of the loop at first
    if (acctype.getText().toString().equals("Administrator")){
        iv_edit_dialog.setVisibility(View.VISIBLE);
    }else {
        iv_edit_dialog.setVisibility(View.INVISIBLE);
    }

应该是这样的：

        DatabaseReference databaseReference = firebaseDatabase.getReference(firebaseAuth.getUid());
        databaseReference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                UserProfile userProfile = dataSnapshot.getValue(UserProfile.class);
                acctype.setText(userProfile.getUserDepartment());

                //granting different functionality based on account type
                if (acctype.getText().toString().equals("Administrator")){
                    iv_edit_dialog.setVisibility(View.VISIBLE);
                }else {
                    iv_edit_dialog.setVisibility(View.INVISIBLE);
                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {
            }
        });

我吸取了教训！非常了解您想要得出的逻辑，然后是预期的工作流程！

非常感谢那些花时间指导我的人！

【讨论】：