• Android android:gravity属性介绍及效果图

    转自： http://blog.csdn.net/aminfo/article/details/7784229

    Android:gravity的属性官方说明如下：

    public static final int AXIS_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 int AXIS_PULL_AFTER

    Since: API Level 1
    Raw bit controlling how the right/bottom edge is placed.
    Constant Value: 4 (0x00000004)

    public static final int AXIS_PULL_BEFORE

    Since: API Level 1
    Raw bit controlling how the left/top edge is placed.
    Constant Value: 2 (0x00000002)

    public static final int AXIS_SPECIFIED

    Since: API Level 1
    Raw bit indicating the gravity for an axis has been specified.
    Constant Value: 1 (0x00000001)

    public static final int AXIS_X_SHIFT

    Since: API Level 1
    Bits defining the horizontal axis.
    Constant Value: 0 (0x00000000)

    public static final int AXIS_Y_SHIFT

    Since: API Level 1
    Bits defining the vertical axis.
    Constant Value: 4 (0x00000004)

    public static final int BOTTOM

    Since: API Level 1
    Push object to the bottom of its container, not changing its size.
    Constant Value: 80 (0x00000050)

    public static final int CENTER

    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 int CENTER_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 int CENTER_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 int CLIP_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 int CLIP_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 int DISPLAY_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 by apply(int, int, int, Rect, int, int, Rect); you must do so yourself by calling applyDisplay(int, Rect, Rect).
    Constant Value: 16777216 (0x01000000)

    public static final int DISPLAY_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 by apply(int, int, int, Rect, int, int, Rect); you must do so yourself by calling applyDisplay(int, Rect, Rect).
    Constant Value: 268435456 (0x10000000)

    public static final int END

    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 int FILL

    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 int FILL_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 int FILL_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 int HORIZONTAL_GRAVITY_MASK

    Since: API Level 1
    Binary mask to get the absolute horizontal gravity of a gravity.
    Constant Value: 7 (0x00000007)

    public static final int LEFT

    Since: API Level 1
    Push object to the left of its container, not changing its size.
    Constant Value: 3 (0x00000003)

    public static final int NO_GRAVITY

    Since: API Level 1
    Constant indicating that no gravity has been set
    Constant Value: 0 (0x00000000)

    public static final int RELATIVE_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 int RELATIVE_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 int RIGHT

    Since: API Level 1
    Push object to the right of its container, not changing its size.
    Constant Value: 5 (0x00000005)

    public static final int START

    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 int TOP

    Since: API Level 1
    Push object to the top of its container, not changing its size.
    Constant Value: 48 (0x00000030)

    public static final int VERTICAL_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 plain copy
     
    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 plain copy
     
    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>  
     
     
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  • 原文地址：https://www.cnblogs.com/dirt2/p/5918773.html
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