Android自定义属性,attr format取值类型
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这里先举个简单的例子,其他可以参考后面的.
实例
自定义attr.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<attr name="text" format="string"/>
<attr name="textColor" format="color"/>
<declare-styleable name="GuaView">
<attr name="text" />
<attr name="textColor" />
</declare-styleable>
</resources>
layout 文件中使用自定义属性
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:doov="http://schemas.android.com/apk/res/com.doov.guaguaka"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<com.doov.guaguaka.GuaView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
doov:text="@string/price"
doov:textColor="@android:color/black"
/>
</RelativeLayout>
命名规则
方式一:
命名空间写法:xmlns:空间名="http://schemas.Android.com/apk/res/自定义组件所在包名"
空间名随便定义,引用时保持一致,如myandroid
方式二:
命名空间写法:xmlns:空间名="http://schemas.android.com/apk/res-auto"
空间名随便定义,引用时保持一致,如myandroid
区别:
Issue 9656: Library projects don't support custom XML attributes for custom classes
Solution:
Upgrade to latest SDK & ADT version (fixed was released since r17) and usehttp://schemas.android.com/apk/res-auto as custom attributes' namespace URI, see Revisions for ADT 17.0.0:
Added support for custom views with custom attributes in libraries. Layouts using custom attributes must use the namespace URI http://schemas.android.com/apk/res-auto instead of the URI that includes the app package name. This URI is replaced with the app specific one at build time.
如果你当前工程是做为lib使用,那么你如上所写 ,会出现找不到自定义属性的错误 ,这时需要使用"http://schemas.android.com/apk/res-auto"
构造函数中获取自定义属性的值
public GuaView(Context context, AttributeSet attrs, int defStyleAttr,
int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
initView();
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.GuaView, defStyleAttr, defStyleRes);
int number = a.getIndexCount();
for (int i = 0; i < number; i++) {
int attr = a.getIndex(i);
switch (attr) {
case R.styleable.GuaView_text:
mText = (String) a.getText(i);
break;
case R.styleable.GuaView_textColor:
mTextColor = a.getColor(i, 0x000000);
break;
default:
break;
}
}
}
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>
</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"
/>
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- 【Android】Android自定义属性,attr format取值类型
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