Android的自定义操作栏不填父母，标题不居中对齐 [英] Android Custom Action bar not filling parent, title not center aligned

问题描述

我一直在尝试了以下问题：我创建了一个自定义操作吧：

I have been experimenting the following issue: I have created a custom action bar:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/com_facebook_blue" >

<TextView 
    android:id="@+id/action_bar_title"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:maxLines="1"
    android:layout_marginLeft="@dimen/activity_horizontal_margin"
    android:layout_centerInParent="true"
    android:textSize="30dp"
    android:textColor="#ffffff"
    android:text="@string/app_title"/>

</RelativeLayout>

这是由一个GraphicsBuilder类以下述方式充胀：

Which is inflated by a GraphicsBuilder class in the following way:

public static void setupActionBar(String title, Activity a) {

        final ViewGroup actionBarLayout = (ViewGroup) a.getLayoutInflater()
                .inflate(R.layout.action_bar_layout, null);
        final ActionBar actionBar = a.getActionBar();

        actionBar.setDisplayShowHomeEnabled(false);
        actionBar.setDisplayShowTitleEnabled(false);
        actionBar.setDisplayShowCustomEnabled(true);
        actionBar.setCustomView(actionBarLayout);
        final int actionBarColor = a.getResources().getColor(R.color.main_red);
        actionBar.setBackgroundDrawable(new ColorDrawable(actionBarColor));

        TextView tv = (TextView) actionBarLayout.findViewById(R.id.action_bar_title);
        Typeface font = Typeface.createFromAsset(a.getAssets(), "fonts/Molle-Regular.ttf");
        tv.setText(title);
        tv.setTypeface(font);
    }

这导致如下结果（我一直在标题栏背景蓝色突出问题）：

Which leads to the following results (I have kept the title bar background blue to highlight the issue):

基本上它看起来像自定义操作栏不填写父母的宽度，因此，任何尝试调整在中心的标题是没用的。我该如何解决这个问题？

Basically it looks like that the custom action bar does not fill the parent width, therefore any try to align the title at the center is useless. How can I fix this?

推荐答案

我知道这是很长一段时间了。 通过改变布局PARAMS一旦它被设置为自定义视图解决了这个问题。

I know this is a long time gone. Solved it by changing the layout params once it's been set as custom view.

我的逻辑是，当你夸大它的第一次，它假定原来的容器的大小。 当你调用：

My logic was that when you inflate it the first time, it assumes the size of the original container. When you call:

actionBar.setCustomView(titlebar);

它已经得到了它的尺寸preSET。 我的解决办法是：

It's already got its dimensions preset. My solution was:

View titlebar = inflater.inflate(R.layout.titlebar, null);

// Do stuff to Title Bar //

ActionBar actionBar = getActionBar();
actionBar.setCustomView(titlebar);
View v = actionBar.getCustomView();
LayoutParams lp = v.getLayoutParams();
lp.width = LayoutParams.MATCH_PARENT;
v.setLayoutParams(lp);

另外，你可以先设置操作栏布局不充气：

Alternatively, you can first set the action bar layout without the inflater:

ActionBar actionBar = getActionBar();
actionBar.setCustomView(R.id.titlebar);
View v = actionBar.getCustomView();
// Do something to the view  E.g Set button listeners blah //

// Rest of code

这篇关于Android的自定义操作栏不填父母，标题不居中对齐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！