Android自定义控件之自定义属性 format详解

Android 自定义View 控件己经不是什么新鲜话题，Android Api提供了一大堆基础组件给我们，需要什么特定功能还需要我们继承它们然后定制更加丰富的功能。这里介绍一下自定义属性format

1. reference：参考某一资源ID。

    （1）属性定义：

           

                   background" format = "reference" />

           

    （2）属性使用：

            

                     android:layout_width = "42dip"
                     android:layout_height = "42dip"
                     android:background = "@drawable/图片ID"

                     />

2. color：颜色值。

    （1）属性定义：

           

                   textColor" format = "color" />

           

    （2）属性使用：

           

                     android:layout_width = "42dip"
                     android:layout_height = "42dip"
                     android:textColor = "#00FF00"

                     />

3. boolean：布尔值。

    （1）属性定义：

           

                   focusable" format = "boolean" />

           

    （2）属性使用：

           

                    android:layout_width = "42dip"
                    android:layout_height = "42dip"

                    android:focusable = "true"

                    />

4. dimension：尺寸值。

    （1）属性定义：

           

                   layout_width" format = "dimension" />

           

    （2）属性使用：

           

                    android:layout_width = "42dip"
                    android:layout_height = "42dip"

                    />

5. float：浮点值。

    （1）属性定义：

           

                   fromAlpha" format = "float" />
                   toAlpha" format = "float" />

           

    （2）属性使用：

                               android:fromAlpha = "1.0"
                   android:toAlpha = "0.7"

                   />

6. integer：整型值。

    （1）属性定义：

           

                  
                   frameDuration" format="integer" />
                   framesCount" format="integer" />
                  
                  
                  

           

    （2）属性使用：

           

                   xmlns:android = "http://schemas.android.com/apk/res/android"  
                   android:drawable = "@drawable/图片ID"  
                   android:pivotX = "50%"  
                   android:pivotY = "50%"  
                   android:framesCount = "12"  
                   android:frameDuration = "100"

                   />

7. string：字符串。

    （1）属性定义：

           
                   apiKey" format = "string" />
            

    （2）属性使用：

                                android:layout_width = "fill_parent"
                    android:layout_height = "fill_parent"
                    android:apiKey = "0jOkQ80oD1JL9C6HAja99uGXCRiS2CGjKO_bc_g"

                    />

8. fraction：百分数。

    （1）属性定义：

           
                  
                  
                  
                   pivotX" format = "fraction" />
                   pivotY" format = "fraction" />
                  
            

    （2）属性使用：

           

                   xmlns:android = "http://schemas.android.com/apk/res/android" 
　　             android:interpolator = "@anim/动画ID"

                   android:fromDegrees = "0" 
　　             android:toDegrees = "360"

                   android:pivotX = "200%"

                   android:pivotY = "300%" 
　　             android:duration = "5000"

                   android:repeatMode = "restart"

                   android:repeatCount = "infinite"

                   />

9. enum：枚举值。

    （1）属性定义：

           
                   orientation">
                          <enum name="horizontal" value="0" />
                          <enum name="vertical" value="1" />
                               

           

    （2）属性使用：

            

                    xmlns:android = "http://schemas.android.com/apk/res/android"
                    android:orientation = "vertical"
                    android:layout_width = "fill_parent"
                    android:layout_height = "fill_parent"
                    >
            

10. flag：位或运算。

     （1）属性定义：

            
                    windowSoftInputMode">
                            <flag name = "stateUnspecified" value = "0" />
                            <flag name = "stateUnchanged" value = "1" />
                            <flag name = "stateHidden" value = "2" />
                            <flag name = "stateAlwaysHidden" value = "3" />
                            <flag name = "stateVisible" value = "4" />
                            <flag name = "stateAlwaysVisible" value = "5" />
                            <flag name = "adjustUnspecified" value = "0x00" />
                            <flag name = "adjustResize" value = "0x10" />
                            <flag name = "adjustPan" value = "0x20" />
                            <flag name = "adjustNothing" value = "0x30" />
                              

            

     （2）属性使用：

            

                   android:name = ".StyleAndThemeActivity"
                   android:label = "@string/app_name"
                   android:windowSoftInputMode = "stateUnspecified | stateUnchanged　|　stateHidden">
                   
                         
                         
                  
            

     注意：

     属性定义时可以指定多种类型值。

    （1）属性定义：

           

                   background" format = "reference|color" />

           

    （2）属性使用：

            

                     android:layout_width = "42dip"
                     android:layout_height = "42dip"
                     android:background = "@drawable/图片ID|#00FF00"

                     />

转载于:https://blog.51cto.com/hocking/1744139