一、属性的解释
二、自定义属性的使用
一、属性的解释
android values中attrs.xml属性类型对应的解释:
1. reference:参考某一资源ID。
(1)属性定义:
- <declare-styleable name = "名称">
- <attr name = "background" format = "reference" />
- </declare-styleable>
(2)属性使用:
- <ImageView
- android:layout_width = "42dip"
- android:layout_height = "42dip"
- android:background = "@drawable/图片ID"
- />
2. color:颜色值。
(1)属性定义:
- <declare-styleable name = "名称">
- <attr name = "textColor" format = "color" />
- </declare-styleable>
(2)属性使用:
- <TextView
- android:layout_width = "42dip"
- android:layout_height = "42dip"
- android:textColor = "#00FF00"
- />
3. boolean:布尔值。
(1)属性定义:
- <declare-styleable name = "名称">
- <attr name = "focusable" format = "boolean" />
- </declare-styleable>
(2)属性使用:
- <Button
- android:layout_width = "42dip"
- android:layout_height = "42dip"
- android:focusable = "true"/>
4. dimension:尺寸值。
(1)属性定义:
- <declare-styleable name = "名称">
- <attr name = "layout_width" format = "dimension" />
- </declare-styleable>
(2)属性使用:
- <Button
- android:layout_width = "42dip"
- android:layout_height = "42dip"
- />
5. float:浮点值。
(1)属性定义:
- <declare-styleable name = "AlphaAnimation">
- <attr name = "fromAlpha" format = "float" />
- <attr name = "toAlpha" format = "float" />
- </declare-styleable>
(2)属性使用:
- <alpha
- android:fromAlpha = "1.0"
- android:toAlpha = "0.7"
- />
6. integer:整型值。
(1)属性定义:
- <declare-styleable name = "AnimatedRotateDrawable">
- <attr name = "visible" />
- <attr name = "frameDuration" format="integer" />
- <attr name = "framesCount" format="integer" />
- <attr name = "pivotX" />
- <attr name = "pivotY" />
- <attr name = "drawable" />
- </declare-styleable>
(2)属性使用:
- <animated-rotate
- 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:
- <declare-styleable name = "MapView">
- <attr name = "apiKey" format = "string" />
- </declare-styleable>
(2)属性使用:
- <com.google.android.maps.MapView
- 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:
- <declare-styleable name="RotateDrawable">
- <attr name = "visible" />
- <attr name = "fromDegrees" format = "float" />
- <attr name = "toDegrees" format = "float" />
- <attr name = "pivotX" format = "fraction" />
- <attr name = "pivotY" format = "fraction" />
- <attr name = "drawable" />
- </declare-styleable>
(2)属性使用:
- <rotate
- 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:
- <declare-styleable name="名称">
- <attr name="orientation">
- <enum name="horizontal" value="0" />
- <enum name="vertical" value="1" />
- </attr>
- </declare-styleable>
(2)属性使用:
- <LinearLayout
- xmlns:android = "http://schemas.android.com/apk/res/android"
- android:orientation = "vertical"
- android:layout_width = "fill_parent"
- android:layout_height = "fill_parent"
- >
- </LinearLayout>
10. flag:位或运算。
(1)属性定义:
- <declare-styleable name="名称">
- <attr name="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" />
- </attr>
- lt;/declare-styleable>
(2)属性使用:
- <activity
- android:name = ".StyleAndThemeActivity"
- android:label = "@string/app_name"
- android:windowSoftInputMode = "stateUnspecified | stateUnchanged | stateHidden">
- <intent-filter>
- <action android:name = "android.intent.action.MAIN" />
- <category android:name = "android.intent.category.LAUNCHER" />
- </intent-filter>
- </activity>
注意:
属性定义时可以指定多种类型值。
(1)属性定义:
- <declare-styleable name = "名称">
- <attr name = "background" format = "reference|color" />
- </declare-styleable>
(2)属性使用:
- <ImageView
- android:layout_width = "42dip"
- android:layout_height = "42dip"
- android:background = "@drawable/图片ID|#00FF00"
- />
二、自定义属性的使用
在android中我们习惯了在XML布局文件中,进行控件属性的设置,由于控件默认提供的属性数量有限,为了增加属性我们可以给控件添加一些自定义的属性,下面来讲一下为控件添加自定义属性的几个步骤。
1>在res/values文件下添加一个attrs.xml文件(没有的话)如下:
- <?xml version="1.0" encoding="utf-8"?>
- <resources>
-
- <declare-styleable name="ImageTextButton">
- <attr format="reference" name="iconImage" />
- <attr format="reference" name="bkImage" />
- <attr format="integer" name="borderLeft" />
- <attr format="integer" name="borderRight" />
- <attr format="integer" name="borderTop" />
- <attr format="integer" name="borderBottom" />
- <attr format="integer" name="buttonstate" />
- <attr name="iconLocation">
- <enum name="center" value="0" />
- <enum name="left" value="1" />
- <enum name="right" value="2" />
- </attr>
- </declare-styleable>
- </resources>
2>在相关的XML布局文件中使用自定义的属性:
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- xmlns:mux="http://schemas.android.com/apk/res/com.shareboard"
- android:layout_width="530dp"
- android:layout_height="320dp"
- android:background="@color/dlgBg"
- android:orientation="vertical" >
-
- <com.shareboard.uicontrols.ImageTextButton
- android:id="@+id/btnCancel"
- android:layout_width="100sp"
- android:layout_height="wrap_content"
- android:layout_alignParentRight="true"
- android:layout_marginRight="20dp"
- mux:bkImage="@drawable/cell_bkgnd"
- mux:buttonstate="2"
- android:text="@string/btn_cancel"
- android:textColor="@color/btnText"
- android:textSize="@dimen/btnText" />
-
- <com.shareboard.uicontrols.ImageTextButton
- android:id="@+id/btnDone"
- android:layout_width="100sp"
- android:layout_height="wrap_content"
- android:layout_alignParentLeft="true"
- android:layout_marginLeft="@dimen/btnMargin"
- mux:bkImage="@drawable/cell_bkgnd"
- mux:buttonstate="2"
- android:text="@string/btn_done"
- android:textColor="@color/btnText"
- android:textSize="@dimen/btnText" />
- </LinearLayout>
3>在代码中获取自定义的属性值:
- public final class ImageTextButton extends Button {
- private int mIconId;
- private int mBkimgId;
- private int mBorderLeft = 10;
- private int mBorderRight = 10;
- private int mBorderTop = 10;
- private int mBorderBottom = 10;
- private int mnButtonState = 4;
- private int mIconLocation = 0;
- private boolean mbChecked = false;
-
- public ImageTextButton(Context context) {
- super(context);
- setClickable(true);
- }
-
- public ImageTextButton(Context context, AttributeSet attrs) {
- super(context, attrs);
- readAttrs(context, attrs);
- setClickable(true);
- }
-
- private void readAttrs(Context context, AttributeSet attrs) {
- TypedArray types = context.obtainStyledAttributes(attrs,
- R.styleable.ImageTextButton);
- final int count = types.getIndexCount();
- for (int i = 0; i < count; ++i) {
- int attr = types.getIndex(i);
- switch (attr) {
- case R.styleable.ImageTextButton_iconImage:
- mIconId = types.getResourceId(attr, 0);
- break;
- case R.styleable.ImageTextButton_bkImage:
- mBkimgId = types.getResourceId(attr, 0);
- break;
- case R.styleable.ImageTextButton_borderLeft:
- mBorderLeft = types.getInteger(attr, 10);
- break;
- case R.styleable.ImageTextButton_borderRight:
- mBorderRight = types.getInteger(attr, 10);
- break;
- case R.styleable.ImageTextButton_borderTop:
- mBorderTop = types.getInteger(attr, 10);
- break;
- case R.styleable.ImageTextButton_borderBottom:
- mBorderBottom = types.getInteger(attr, 10);
- break;
- case R.styleable.ImageTextButton_iconLocation:
- mIconLocation = types.getInteger(attr, 0);
- break;
- case R.styleable.ImageTextButton_buttonstate:
- mnButtonState = types.getInteger(attr, 4);
- break;
- }
- }
- types.recycle();
- }
- }
好了这就完成了自定义属性的定义和使用。
原文引用整理。
http://blog.youkuaiyun.com/jiangwei0910410003/article/details/17006087
http://blog.youkuaiyun.com/wangjia55/article/details/9027629