Question

当我试图在片段中诋毁崩溃栏时，它不会崩溃，但是当我在一个简单的活动中尝试相同的代码时，它工作正常，我想在片段（ProfileFragment）中使用相同的设计，没有错误发生它只是只是显示，但它没有崩溃，我想让它工作正常请帮助我，看看我想要暗示我的代码。

这是我的XML

<android.support.constraint.ConstraintLayout 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"
    android:clickable="true"
    android:focusable="true"
    tools:context="com.turbo.ashish.hexon.BottomNavFragment.ProfileFragment">

    <!-- TODO: Update blank fragment layout -->

    <android.support.design.widget.AppBarLayout
        android:id="@+id/idProfileWallappbar"
        android:layout_width="match_parent"
        android:layout_height="238dp">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/idcollapsbarlayout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:contentScrim="?attr/colorAccent"
            app:expandedTitleMarginBottom="20dp"
            app:expandedTitleMarginEnd="64dp"
            app:expandedTitleMarginStart="20dp"
            app:layout_scrollFlags="exitUntilCollapsed|scroll"
            app:title="@string/title_profile">

            <ImageView
                android:id="@+id/idImageViewCollapsingToolbarLayout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />

            <android.support.v7.widget.Toolbar
                android:id="@+id/idtoolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:background="@color/custColtransparante"
                app:layout_collapseMode="pin">

            </android.support.v7.widget.Toolbar>

        </android.support.design.widget.CollapsingToolbarLayout>

    </android.support.design.widget.AppBarLayout>

    <Button
        android:id="@+id/idFragBtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="304dp"
        android:text="Button"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

My Fragment Java File ..

package com.turbo.ashish.hexon.BottomNavFragment;


import android.net.Uri;
import android.os.Bundle;
import android.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.StorageReference;
import com.turbo.ashish.hexon.R;

import static android.widget.Toast.LENGTH_LONG;


public class ProfileFragment extends Fragment {


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this fragment


        Log.d("Working","Wasd");
        View fragView = inflater.inflate(R.layout.fragment_profile,container,false);
        fragView.findViewById(R.id.idFragBtn).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(getActivity(),"asd",Toast.LENGTH_LONG).show();
            }
        });

        return fragView;
    }

}

但是，在Fragment中，Collapsing栏布局始终保持不变，我想让这个collapsingbar处理片段（ProfileFragment）..

我的平台活动，我加载片段如：

private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
            = new BottomNavigationView.OnNavigationItemSelectedListener() {
        @SuppressLint("ResourceType")
        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            android.app.FragmentTransaction ft = getFragmentManager().beginTransaction();


            switch (item.getItemId()){
                case R.id.idNavContacts:
                    toolbar.setTitle("Contacts");
                    ft.replace(R.id.idFrameContainer, new ContactsFragment(), "Contacts Ftagment").commit();
                    return true;

                case R.id.idNavPerson:
                    toolbar.setTitle("Profile");
                    ft.replace(R.id.idFrameContainer,new ProfileFragment(), "Profile Fragment").commit();
                    return true;

                case R.id.idNavGroups:
                    toolbar.setTitle("Groups");
                    ft.replace(R.id.idFrameContainer,new GroupsFragment(), "Groups Fragment").commit();
                    return true;

                case R.id.idNavFeeds:
                    toolbar.setTitle("Feeds");
                    ft.replace(R.id.idFrameContainer, new FeedskFragment(), "Feeds Fragment").commit();
                    return true;
            }
            return false;
        }
    };

加载片段没有问题，但是Collapsing栏没有响应（没有滑动），我希望以片段形式发生。

活动XML

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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="com.turbo.ashish.hexon.Platform">

    <FrameLayout
        android:id="@+id/idFrameContainer"
        android:layout_width="match_parent"
        android:layout_height="454dp">

    </FrameLayout>

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/idBottomNav"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:background="?android:attr/windowBackground"
        app:itemBackground="@color/WHITE"
        android:foreground="?attr/selectableItemBackground"
        app:itemIconTint="@color/deepViolate"
        app:itemTextColor="@color/deepViolate"
        app:menu="@menu/navigation">
    </android.support.design.widget.BottomNavigationView>

</android.support.design.widget.CoordinatorLayout>

Answer 1

为什么我的折叠工具栏布局不起作用？

您希望折叠工具栏在约束布局中工作吗？

首先，要使折叠工具栏正常工作

android.support.design.widget.CoordinatorLayout

作为 root布局。

Answer 2

在android.support.constraint.ConstraintLayout的代码instand下面的xml文件中更改为room xml标记..

<android.support.design.widget.CoordinatorLayout>

折叠工具栏布局无法在Fragment中运行 - Android

2 个答案: