Android 如何在水平 LinearLayout 中将元素向右对齐？

how to align an element to right in horizontal LinearLayout?

提问by MRefaat

I have a LinearLayoutthat contains a lot of TextViewsand ImageButtons, I want to align some of these elements to right, i had a look at thisand thisbut i can't use their tips as i can't change the orientationand can't make android.gravity:rightas i don't want to align all the elements to right, also i can't use nested layouts or but the desired elements into RelativeLayoutbecause that shifts the rest of elements to the left and i want them at the center.

我有一个LinearLayout包含很多TextViews和的ImageButtons，我想将其中一些元素对齐，我看过这个和这个，但我不能使用他们的提示，因为我不能改变orientation，也不能android.gravity:right像我不想将所有元素向右对齐，我也不能使用嵌套布局或所需的元素，RelativeLayout因为这会将其余元素向左移动，而我希望它们位于中心。

this is my code:

这是我的代码：

 <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="0dp"
            android:layout_weight="0.15"
            android:layout_marginTop="10dp"
            android:layout_gravity="center"
            android:gravity="center"
            android:background="@drawable/media_mediabar"
            android:orientation="horizontal" >

            <ImageButton
                android:id="@+id/move_backward"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:adjustViewBounds="true"
                android:background="@android:color/transparent"
                android:clickable="true"
                android:scaleType="centerInside"
                android:src="@drawable/media_button_rewind"
                android:layout_marginLeft="7dp"
                android:layout_marginRight="7dp"
                android:tag="released"/>

           <ImageButton
                android:id="@+id/rmeote_mines"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:adjustViewBounds="true"
                android:background="@android:color/transparent"
                android:clickable="true"
                android:scaleType="centerInside"
                android:src="@drawable/remote_minus" />


          <TextView 
                android:id="@+id/remote_plus_minus"
                android:text="0"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="@android:color/white"
                android:layout_gravity="center"
                android:layout_marginTop="15dp"
                android:layout_marginBottom="15dp" />
            .
            .
            .<!.. some other elements ..!>
        </LinearLayout>

The desired result:

想要的结果：

回答by GareginSargsyan

The simplest solution would be using empty views with weights as separators.

最简单的解决方案是使用带有权重作为分隔符的空视图。

<LinearLayout android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:orientation="horizontal">
    <!-- Left button -->
    <Button ...
            ... />
    <View android:layout_width="0dp"
          android:layout_height="match_parent"
          android:layout_weight="1" />
    <!-- Middle button -->
    <Button ...
            ... />
    <View android:layout_width="0dp"
          android:layout_height="match_parent"
          android:layout_weight="1" />
    <!-- Right button -->
    <Button ...
            ... />
</LinearLayout>

The separator views can be made invisible as an optimization, because they don't draw anything and are used only for layout. You can tweak the actual 'layout_weight' values to get the desired layout. Starting from API level 14 you can use instances of Spaceas separators which will improve performance and readability (there is also a version of Space in the support library).

作为优化，分隔符视图可以不可见，因为它们不绘制任何内容并且仅用于布局。您可以调整实际的“layout_weight”值以获得所需的布局。从 API 级别 14 开始，您可以使用Space 的实例作为分隔符，这将提高性能和可读性（支持库中还有一个 Space 版本）。

回答by Ridcully

For such a complex layout you'd be way better of using RelativeLayoutinstead.

对于如此复杂的布局，您最好使用它RelativeLayout。

回答by Ilya Gazman

i can't use nested layouts

我不能使用嵌套布局

Then you can't solve your problem.

那你的问题就解决不了了。

Nested layout are the heart of Android layout, to create such complex view that you desire, I think you must use nested layouts.

嵌套布局是 Android 布局的核心，要创建您想要的如此复杂的视图，我认为您必须使用嵌套布局。

@Ridcully suggested you to use RelativeLayout, this is a good idea. You can combine it with few linear layouts and you be fine.

@Ridcully 建议您使用RelativeLayout，这是个好主意。你可以将它与一些线性布局结合起来，你会没事的。

I think that RelativeLayoutshould be your base layout.

我认为这RelativeLayout应该是您的基本布局。