Android2.2 Api--imageview

Note

Please see the full version of this article for later updates:

Http://www.cnblogs.com/over140/archive/2011/06/08/2075054.html

Source: farmer Uncle: http://www.cnblogs.com/over140/

Body

First, the structure

Java.lang.Object

Android.view.View

Android.widget.ImageView

Known Direct subclasses:

ImageButton, Quickcontactbadge

Known indirect subclasses:

Zoombutton

Ii. Overview of the class

Displays any image, as an example. The ImageView class can load pictures from a variety of sources, such as a resource or a picture library, and needs to calculate the size of the image, which can be used in other layouts, and provides various display options such as zooming and shading (rendering).

Third, XML properties

Property name	Describe
Android:adjustviewbounds	Whether to maintain the aspect ratio. Need to be used with maxwidth, maxheight, otherwise no effect is used alone.
Android:croptopadding	Whether to intercept the specified area with white space instead. Individually set no effect, need to work with scrolly, the effect is as follows, implementation code see Code section:
Android:maxheight	Sets the maximum height of the view, which is not valid for use alone and needs to be used with setadjustviewbounds. If you want to set the image to a fixed size and want to maintain the picture aspect ratio, you need the following settings: 1) Set Setadjustviewbounds to true; 2) Set MaxWidth, MaxHeight; 3) Set settings Layout_width and Layout_height to Wrap_content.
Android:maxwidth	Sets the maximum width of the view. Ditto.
Android:scaletype	Sets how the picture is filled. Matrix 0 Use a matrix to draw Fitxy 1 Stretch the picture (not proportionally) to fill the view's width height Layout_ Height : 30px Layout_ Width : 120px Fitstart 2 Stretch the picture proportionally, the height of the picture is the height of the view, and it appears on the left side of the view Fitcenter 3 Stretches the picture proportionally to the height of the view and appears in the middle of the view Fitend 4 Stretch the picture proportionally, the height of the picture is the height of the view, and appears on the right side of the view Center 5 Displays the picture at the original size, but the picture is wider than the width of the view, and the middle part of the picture shows Layout_ Height : 60px Layout_ Width : 80px Padding : 10px Centercrop 6 Enlarges the original image proportionally to the width and height of a side view. Centerinside 7 When the original image is wide or equal to the width of the view, it is centered on the original size, whereas the original is scaled to the view's wide-height center display.
Android:src	Set the view's drawable (slice, or color, but need to specify the size of the view)
Android:tint	Renders the picture as a specified color. See: The left is the original, the right side is the set effect, see the following code.

Four, the code

4.1 Android:tint

<ImageViewAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:background= "@android: Color/white"android:src= "@drawable/btn_mode_switch_bg" ></ImageView><ImageViewAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:background= "@android: Color/white"android:src= "@drawable/btn_mode_switch_bg"Android:tint= "#ffff00" ></ImageView>

4.2 android:croptopadding

<ImageViewAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:background= "@android: Color/white"android:croptopadding= "true"android:scrolly= " -10px"android:src= "@drawable/btn_mode_switch_bg" ></ImageView><ImageViewAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:background= "@android: Color/white"android:croptopadding= "true"android:scrolly= "10px"android:src= "@drawable/btn_mode_switch_bg" ></ImageView><ImageViewAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:background= "@android: Color/white"android:croptopadding= "true"Android:paddingtop= "10px"android:scrolly= "10px"android:src= "@drawable/btn_mode_switch_bg" ></ImageView><ImageViewAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:background= "@android: Color/white"android:croptopadding= "false"Android:paddingtop= "10px"android:scrolly= "10px"android:src= "@drawable/btn_mode_switch_bg" ></ImageView>

Five, Series

Android2.2 API Chinese Document series (1)--textview

Android2.2 API Chinese Document series (2)--edittext

Android2.2 API Chinese Document series (3)--accessibilityservice

Android2.2 API Chinese Document series (4)--manifest

Android2.2 API Chinese Document series (5)--view

End

This article Android:tint property is interesting, and android:adjustviewbounds and android:croptopadding are difficult, it took more than one hours to try out the effect.

Android2.2 Api--imageview