片段未显示在活动中 [英] Fragment not showing in activity

问题描述

我有一个具有自己布局的片段，应该在其中添加片段的活动具有以下布局:

I have a fragment with its own layout, and the activity in which the fragment should be added has this layout:

<?xml version="1.0" encoding="utf-8"?>
   <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" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin">

    <fragment
    android:name="com.myapp.MyFragment"
    android:id="@+id/myfragment"
    android:layout_weight="1"
    android:layout_width="0dp"
    android:layout_height="match_parent"
    tools:layout="@layout/myfragment_layout" />
</RelativeLayout>

然后在活动课中:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_info);

    FragmentManager fm = getFragmentManager();

    fragment = fm.findFragmentById(R.id.myfragment);
    if (fragment == null) {
        fragment = new MyFragment();

        FragmentTransaction ft = fm.beginTransaction();
        ft.add(R.id.myfragment, fragment, "myfragment");
        ft.commit();
    }
}

该片段的onCreateView为:

The onCreateView of the fragment is:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    super.onCreateView(inflater, container, savedInstanceState);

    return inflater.inflate(R.layout.myfragment, container, false);
}

但是该片段未显示.没有异常被抛出.活动保持空白.

But the fragment is not showing. No exception is thrown. The activity remains blank.

我想念什么?

推荐答案

替换以下几行

android:layout_weight ="1"android:layout_width ="0dp"

android:layout_weight="1" android:layout_width="0dp"

与

android:layout_width ="match_parent" 或 android:layout_width ="wrap_content"

因为 RelativeLayout 不接受layout_weight.

because RelativeLayout doesn't accept the layout_weight.

这篇关于片段未显示在活动中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！