Android android:gravity属性介绍及效果图

android:gravity的属性官方说明如下：

public static final intAXIS_CLIP

Since: API Level 3

Raw bit controlling whether the right/bottom edge is clipped to its container, based on the gravity direction being applied.

Constant Value: 8 (0x00000008)

public static final intAXIS_PULL_AFTER

Since: API Level 1

Raw bit controlling how the right/bottom edge is placed.

Constant Value: 4 (0x00000004)

public static final intAXIS_PULL_BEFORE

Since: API Level 1

Raw bit controlling how the left/top edge is placed.

Constant Value: 2 (0x00000002)

public static final intAXIS_SPECIFIED

Since: API Level 1

Raw bit indicating the gravity for an axis has been specified.

Constant Value: 1 (0x00000001)

public static final intAXIS_X_SHIFT

Since: API Level 1

Bits defining the horizontal axis.

Constant Value: 0 (0x00000000)

public static final intAXIS_Y_SHIFT

Since: API Level 1

Bits defining the vertical axis.

Constant Value: 4 (0x00000004)

public static final intBOTTOM

Since: API Level 1

Push object to the bottom of its container, not changing its size.

Constant Value: 80 (0x00000050)

public static final intCENTER

Since: API Level 1

Place the object in the center of its container in both the vertical and horizontal axis, not changing its size.

Constant Value: 17 (0x00000011)

public static final intCENTER_HORIZONTAL

Since: API Level 1

Place object in the horizontal center of its container, not changing its size.

Constant Value: 1 (0x00000001)

public static final intCENTER_VERTICAL

Since: API Level 1

Place object in the vertical center of its container, not changing its size.

Constant Value: 16 (0x00000010)

public static final intCLIP_HORIZONTAL

Since: API Level 3

Flag to clip the edges of the object to its container along the horizontal axis.

Constant Value: 8 (0x00000008)

public static final intCLIP_VERTICAL

Since: API Level 3

Flag to clip the edges of the object to its container along the vertical axis.

Constant Value: 128 (0x00000080)

public static final intDISPLAY_CLIP_HORIZONTAL

Since: API Level 3

Special constant to enable clipping to an overall display along the horizontal dimension. This is not applied by default byapply(int, int, int, Rect, int, int, Rect); you must do so yourself by callingapplyDisplay(int, Rect, Rect).

Constant Value: 16777216 (0x01000000)

public static final intDISPLAY_CLIP_VERTICAL

Since: API Level 3

Special constant to enable clipping to an overall display along the vertical dimension. This is not applied by default byapply(int, int, int, Rect, int, int, Rect); you must do so yourself by callingapplyDisplay(int, Rect, Rect).

Constant Value: 268435456 (0x10000000)

public static final intEND

Since: API Level 14

Push object to x-axis position at the end of its container, not changing its size.

Constant Value: 8388613 (0x00800005)

public static final intFILL

Since: API Level 1

Grow the horizontal and vertical size of the object if needed so it completely fills its container.

Constant Value: 119 (0x00000077)

public static final intFILL_HORIZONTAL

Since: API Level 1

Grow the horizontal size of the object if needed so it completely fills its container.

Constant Value: 7 (0x00000007)

public static final intFILL_VERTICAL

Since: API Level 1

Grow the vertical size of the object if needed so it completely fills its container.

Constant Value: 112 (0x00000070)

public static final intHORIZONTAL_GRAVITY_MASK

Since: API Level 1

Binary mask to get the absolute horizontal gravity of a gravity.

Constant Value: 7 (0x00000007)

public static final intLEFT

Since: API Level 1

Push object to the left of its container, not changing its size.

Constant Value: 3 (0x00000003)

public static final intNO_GRAVITY

Since: API Level 1

Constant indicating that no gravity has been set

Constant Value: 0 (0x00000000)

public static final intRELATIVE_HORIZONTAL_GRAVITY_MASK

Since: API Level 14

Binary mask for the horizontal gravity and script specific direction bit.

Constant Value: 8388615 (0x00800007)

public static final intRELATIVE_LAYOUT_DIRECTION

Since: API Level 14

Raw bit controlling whether the layout direction is relative or not (START/END instead of absolute LEFT/RIGHT).

Constant Value: 8388608 (0x00800000)

public static final intRIGHT

Since: API Level 1

Push object to the right of its container, not changing its size.

Constant Value: 5 (0x00000005)

public static final intSTART

Since: API Level 14

Push object to x-axis position at the start of its container, not changing its size.

Constant Value: 8388611 (0x00800003)

public static final intTOP

Since: API Level 1

Push object to the top of its container, not changing its size.

Constant Value: 48 (0x00000030)

public static final intVERTICAL_GRAVITY_MASK

Since: API Level 1

Binary mask to get the vertical gravity of a gravity.

Constant Value: 112 (0x00000070)

 

效果图1：

 

布局文件xml内容如下：

 

[html] view plaincopy

1. <?xml version="1.0" encoding="utf-8"?>  
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
3.    android:layout_width="fill_parent"  
4.    android:layout_height="fill_parent"  
5.    android:orientation="vertical">  
6.      
7.    <TextView android:id="@+id/TextView01"  
8.         android:layout_width="fill_parent"  
9.         android:layout_height="35dp"  
10.         android:text="top"  
11.         android:gravity="top"  
12.         android:textColor="#ffffff"  
13.         android:background="#ff0000"  
14.         android:layout_margin="1px"/>  
15.           
16.    <TextView android:id="@+id/TextView02"  
17.         android:layout_width="fill_parent"  
18.         android:layout_height="35dp"  
19.         android:text="bottom"  
20.         android:gravity="bottom"  
21.         android:textColor="#ffffff"  
22.         android:background="#ff0000"  
23.         android:layout_margin="1px"/>  
24.           
25.    <TextView android:id="@+id/TextView03"  
26.         android:layout_width="fill_parent"  
27.         android:layout_height="35dp"  
28.         android:text="left"  
29.         android:gravity="left"  
30.         android:textColor="#ffffff"  
31.         android:background="#ff0000"  
32.         android:layout_margin="1px"/>  
33.           
34.    <TextView android:id="@+id/TextView04"  
35.         android:layout_width="fill_parent"  
36.         android:layout_height="35dp"  
37.         android:text="right"  
38.         android:gravity="right"  
39.         android:textColor="#ffffff"  
40.         android:background="#ff0000"  
41.         android:layout_margin="1px"/>  
42.           
43.    <TextView android:id="@+id/TextView05"  
44.         android:layout_width="fill_parent"  
45.         android:layout_height="35dp"  
46.         android:text="center_vertical"  
47.         android:gravity="center_vertical"  
48.         android:textColor="#ffffff"  
49.         android:background="#ff0000"  
50.         android:layout_margin="1px"/>  
51.           
52.    <TextView android:id="@+id/TextView06"  
53.         android:layout_width="fill_parent"  
54.         android:layout_height="35dp"  
55.         android:text="fill_vertical"  
56.         android:gravity="fill_vertical"  
57.         android:textColor="#ffffff"  
58.         android:background="#ff0000"  
59.         android:layout_margin="1px"/>  
60.           
61.    <TextView android:id="@+id/TextView07"  
62.         android:layout_width="fill_parent"  
63.         android:layout_height="35dp"  
64.         android:text="center_horizontal"  
65.         android:gravity="center_horizontal"  
66.         android:textColor="#ffffff"  
67.         android:background="#ff0000"  
68.         android:layout_margin="1px"/>  
69.           
70.    <TextView android:id="@+id/TextView08"  
71.         android:layout_width="fill_parent"  
72.         android:layout_height="35dp"  
73.         android:text="fill_horizontal"  
74.         android:gravity="fill_horizontal"  
75.         android:textColor="#ffffff"  
76.         android:background="#ff0000"  
77.         android:layout_margin="1px"/>                                                          
78.   
79.    <TextView android:id="@+id/TextView09"  
80.         android:layout_width="fill_parent"  
81.         android:layout_height="35dp"  
82.         android:text="center"  
83.         android:gravity="center"  
84.         android:textColor="#ffffff"  
85.         android:background="#ff0000"  
86.         android:layout_margin="1px"/>  
87.           
88.    <TextView android:id="@+id/TextView10"  
89.         android:layout_width="fill_parent"  
90.         android:layout_height="35dp"  
91.         android:text="fill"  
92.         android:gravity="fill"  
93.         android:textColor="#ffffff"  
94.         android:background="#ff0000"  
95.         android:layout_margin="1px"/>  
96.           
97.    <TextView android:id="@+id/TextView11"  
98.         android:layout_width="fill_parent"  
99.         android:layout_height="35dp"  
100.         android:text="clip_vertical"  
101.         android:gravity="clip_vertical"  
102.         android:textColor="#ffffff"  
103.         android:background="#ff0000"  
104.         android:layout_margin="1px"/>  
105.           
106.    <TextView android:id="@+id/TextView12"  
107.         android:layout_width="fill_parent"  
108.         android:layout_height="35dp"  
109.         android:text="clip_horizontal"  
110.         android:gravity="clip_horizontal"  
111.         android:textColor="#ffffff"  
112.         android:background="#ff0000"  
113.         android:layout_margin="1px"/>  
114.                                           
115. </LinearLayout>  

 

效果图2：

 

xml布局文件如下：

[html] view plaincopy

1. <?xml version="1.0" encoding="utf-8"?>  
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
3.    android:layout_width="fill_parent"  
4.    android:layout_height="fill_parent"  
5.    android:orientation="vertical">  
6.      
7.    <TextView android:id="@+id/TextView01"  
8.         android:layout_width="fill_parent"  
9.         android:layout_height="50dp"  
10.         android:text="top"  
11.         android:gravity="top"  
12.         android:textColor="#ffffff"  
13.         android:background="#00ff00"  
14.         android:layout_margin="2px"/>  
15.           
16.    <TextView android:id="@+id/TextView02"  
17.         android:layout_width="fill_parent"  
18.         android:layout_height="50dp"  
19.         android:text="bottom"  
20.         android:gravity="bottom"  
21.         android:textColor="#ffffff"  
22.         android:background="#00ff00"  
23.         android:layout_margin="2px"/>  
24.           
25.    <TextView android:id="@+id/TextView03"  
26.         android:layout_width="fill_parent"  
27.         android:layout_height="50dp"  
28.         android:text="left"  
29.         android:gravity="left"  
30.         android:textColor="#ffffff"  
31.         android:background="#00ff00"  
32.         android:layout_margin="2px"/>  
33.           
34.    <TextView android:id="@+id/TextView04"  
35.         android:layout_width="fill_parent"  
36.         android:layout_height="50dp"  
37.         android:text="right"  
38.         android:gravity="right"  
39.         android:textColor="#ffffff"  
40.         android:background="#00ff00"  
41.         android:layout_margin="2px"/>  
42.           
43.    <TextView android:id="@+id/TextView05"  
44.         android:layout_width="fill_parent"  
45.         android:layout_height="50dp"  
46.         android:text="center_vertical"  
47.         android:gravity="center_vertical"  
48.         android:textColor="#ffffff"  
49.         android:background="#00ff00"  
50.         android:layout_margin="2px"/>  
51.           
52.    <TextView android:id="@+id/TextView06"  
53.         android:layout_width="fill_parent"  
54.         android:layout_height="50dp"  
55.         android:text="fill_vertical"  
56.         android:gravity="fill_vertical"  
57.         android:textColor="#ffffff"  
58.         android:background="#00ff00"  
59.         android:layout_margin="2px"/>  
60.           
61.    <TextView android:id="@+id/TextView07"  
62.         android:layout_width="fill_parent"  
63.         android:layout_height="50dp"  
64.         android:text="center_horizontal"  
65.         android:gravity="center_horizontal"  
66.         android:textColor="#ffffff"  
67.         android:background="#00ff00"  
68.         android:layout_margin="2px"/>  
69.           
70.    <TextView android:id="@+id/TextView08"  
71.         android:layout_width="fill_parent"  
72.         android:layout_height="50dp"  
73.         android:text="fill_horizontal"  
74.         android:gravity="fill_horizontal"  
75.         android:textColor="#ffffff"  
76.         android:background="#00ff00"  
77.         android:layout_margin="2px"/>                                                          
78.   
79.    <TextView android:id="@+id/TextView09"  
80.         android:layout_width="fill_parent"  
81.         android:layout_height="50dp"  
82.         android:text="center"  
83.         android:gravity="center"  
84.         android:textColor="#ffffff"  
85.         android:background="#00ff00"  
86.         android:layout_margin="2px"/>  
87.           
88.    <TextView android:id="@+id/TextView10"  
89.         android:layout_width="fill_parent"  
90.         android:layout_height="50dp"  
91.         android:text="fill"  
92.         android:gravity="fill"  
93.         android:textColor="#ffffff"  
94.         android:background="#00ff00"  
95.         android:layout_margin="2px"/>  
96.           
97.    <TextView android:id="@+id/TextView11"  
98.         android:layout_width="fill_parent"  
99.         android:layout_height="50dp"  
100.         android:text="clip_vertical"  
101.         android:gravity="clip_vertical"  
102.         android:textColor="#ffffff"  
103.         android:background="#00ff00"  
104.         android:layout_margin="2px"/>  
105.           
106.    <TextView android:id="@+id/TextView12"  
107.         android:layout_width="fill_parent"  
108.         android:layout_height="50dp"  
109.         android:text="clip_horizontal"  
110.         android:gravity="clip_horizontal"  
111.         android:textColor="#ffffff"  
112.         android:background="#00ff00"  
113.         android:layout_margin="2px"/>  
114.                                           
115. </LinearLayout>