android – 用另一个片段替换一个片段

我想用一个新的片段来替换一个旧片段,但是我仍然可以得到在新片段中仍然可见的旧片段的按钮.

在旧的,按一下按钮

FragmentTransaction transaction = getFragmentManager().beginTransaction();
Fragment newFragment = GenericMood.newInstance("a","b");

// Replace whatever is in the fragment_container view with this fragment,// and add the transaction to the back stack if needed
transaction.replace(R.id.allmoods,newFragment);
transaction.addToBackStack(null);
transaction.commitAllowingStateLoss();

我可以用新的片段替换旧的片段,但是来自R.id.allmoods片段的按钮在新的片段上仍然可见.

我试着用下面给出的代码.

FragmentTransaction transaction = getFragmentManager().beginTransaction();
Fragment newFragment = GenericMood.newInstance("a",// and add the transaction to the back stack if needed
transaction.replace(((ViewGroup)getView().getParent()).getId(),newFragment);
transaction.addToBackStack(null);
transaction.commitAllowingStateLoss();

XML文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/allmoods"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorPrimary"
    tools:context="com.moodoff.Moods">
     <Button
        android:text="Button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="64dp"
        android:id="@+id/btn_btn"
        android:height="80dp"
        android:width="100dp"
        android:onClick="putmeoff"
        android:layout_marginLeft="17dp"
        android:layout_marginStart="17dp"/>
</RelativeLayout>

这是应该取代以上的片段:

<FrameLayout 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:id="@+id/genericmood"
    android:layout_height="match_parent"
    android:background="@color/colorPrimary"
    tools:context="com.moodoff.GenericMood">
    <!-- TODO: Update blank fragment layout -->


    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#000000"
        android:layout_gravity="fill_horizontal"
        android:id="@+id/floatingButtons"
        >
        <android.support.design.widget.FloatingActionButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="1dp"
            android:layout_marginRight="14dp"
            app:backgroundTint="#ffffff"
            android:layout_alignParentTop="true"
            android:layout_alignParentRight="true"
            android:layout_alignParentEnd="true"
            android:src="@drawable/cameraicon"
            android:id="@+id/btn_camera"
            app:fabSize="mini"
            />
    </RelativeLayout>
</FrameLayout>

两者都不行.该怎么办?
更新:使用适当的容器替换按钮后,新的片段未正确实例化.我得到一个纯白色的白色屏幕.

my activity_alltabs.xml looks like this: 

<?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:id="@+id/main_content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        tools:context="com.moodoff.AllTabs">

        <android.support.design.widget.AppBarLayout
            android:id="@+id/appbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:theme="@style/AppTheme.AppBarOverlay">

            <android.support.design.widget.TabLayout
                android:id="@+id/tabs"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@android:color/background_dark" />

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

        <android.support.v4.view.ViewPager
            android:id="@+id/container"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_behavior="@string/appbar_scrolling_view_behavior" />

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

解决方法

要了解片段转换的流程,首先,您必须了解其活动结构.
让我们来看看:
a)活动:在一切的底部(MainActivity)

activity_main.xml: –

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <FrameLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</RelativeLayout>

这里@ id / container是我们做的片段内容的转换的布局.

B)片段A:最初添加片段到MainActivity容器.

FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
//Instance of fragment
Fragment newFragment = FragmentA.newInstance("a","b");
//It will replace the fragment content view to container of main activity
ft.replace(R.id.container,newFragment);
//FragmentA is added to back stack with it's name as a tag
ft.addToBackStack(FragmentA.class.getSimpleName());
ft.commitAllowingStateLoss();

B)片段B:用FragmentB替换片段A.

FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
//Instance of fragment
Fragment newFragment = FragmentB.newInstance("a","b");
//It will replace the fragment content view to container of fragment A which     // is prevIoUsly replaced to main activity container
ft.replace(R.id.container,newFragment);
//FragmentB is added to back stack with it's name as a tag
ft.addToBackStack(FragmentB.class.getSimpleName());
ft.commitAllowingStateLoss();

因此,这样做的主要目的是将活动容器视图中的/添加片段内容视图.

相关文章

以下为个人理解,如错请评 CE: 凭据加密 (CE) 存储空间, 实际路径/data/user_ce/ DE: 设备加密 (DE) 存...
转载来源:https://blog.csdn.net/yfbdxz/article/details/114702144 用EventLog.writeEvent打的日志(或...
事件分发机制详解 一、基础知识介绍 1、经常用的事件有:MotionEvent.ACTION_DOWN,MotionEvent.ACTION...
又是好久没有写博客了,一直都比较忙,最近终于有时间沉淀和整理一下最近学到和解决的一些问题。 最近进...
Android性能优化——之控件的优化 前面讲了图像的优化,接下来分享一下控件的性能优化,这里主要是面向...
android的开源库是用来在android上显示gif图片的。我在网上查了一下,大家说这个框架写的不错,加载大的...