我冒着写一个重复的问题，但我研究的答案另一个SO质疑 ，我意识到，我无法找到一个简单的问题和答案，其中包括设置重力和一个的LinearLayout 的layout_gravity。另外，我是困惑，当说起的ViewGroup ，而不仅仅是一个观点它们之间的区别。我在下面回答我的问题。

I am risking writing a duplicate question, but as I was researching the answer to another SO question, I realized that I couldn't find a simple question and answer that included setting both gravity and layout_gravity of a LinearLayout. Also, I was confused as to the difference between them when talking about a ViewGroup rather than just a view. I am answering my question below.

下面是一些其他的问题，我认为：

Here are some of the other questions I viewed:

如何设置重力布局编程？ 设置重力的LinearLayout编程 android - 设置的LayoutParams编程 的LayoutParams比重不工作 layout_gravity线性布局 Problem与setLayoutParams在Android的UI 方法 how设置setLayoutParams线性布局元素 Is有可能改变布局宽度和高度的Andr​​oid在运行时？ How to set gravity to layout programmatically? Set gravity for LinearLayout programmatically android - setting LayoutParams programmatically LayoutParams gravity not working layout_gravity in linear layout Problem with setLayoutParams method in android UI how to set setLayoutParams for linear layout elements Is it possible to change the layout width and height in Android at run time?

推荐答案

previously，我已经'重力'和'layout_gravity'之间的差别为布局中的观点解释

Background

Previously, I have explained the difference between 'gravity' and `layout_gravity' for views within a layout.

设置的的LinearLayout 本身的变化范围内它的意见位置重力。设置的layout_gravity一个的LinearLayout 如何改变的的LinearLayout 被安排其父布局中。

Setting the gravity of a LinearLayout itself changes the location of the views within it. Setting the layout_gravity of a LinearLayout changes how the LinearLayout is arranged within its parent layout.

此图显示了一个的LinearLayout （棕色）在的FrameLayout （白色）。该的LinearLayout 的重力设置为 center_horizo​​ntal 及其 layout_gravity 设置为右|。底部

This image shows a LinearLayout (brown) within a FrameLayout (white). The LinearLayout's gravity is set to center_horizontal and its layout_gravity is set to right|bottom.

下面是XML：

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

<LinearLayout
    android:id="@+id/llExample"
    android:layout_width="200dp"
    android:layout_height="200dp"
    android:layout_gravity="right|bottom"
    android:background="#e3e2ad"
    android:gravity="center_horizontal"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="100dp"
        android:layout_height="50dp"
        android:background="#bcf5b1"
        android:text="TextView 1" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="100dp"
        android:layout_height="50dp"
        android:background="#aacaff"
        android:text="TextView 2" />
</LinearLayout>

</FrameLayout>

更改的事情编程

下面code说明了如何同时更改的的LinearLayout 。

Changing things programmatically

The following code shows how to change both the gravity and the layout_gravity of the LinearLayout.

public class LinearLayoutGravity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.linear_layout_gravity);

    // Change the gravity (not layout_gravity) of the LinearLayout
    LinearLayout ll = (LinearLayout) findViewById(R.id.llExample);
    ll.setGravity(Gravity.CENTER);

    // Change the layout_gravity (not gravity) of the LinearLayout      
    FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(400, 400);
    params.gravity = Gravity.TOP;
    params.gravity = Gravity.RIGHT;
    ll.setLayoutParams(params);
}
}

这里是结果：

And here is the result: