自定义属性的使用

原创
2015/02/04 14:00
阅读数 566

Android自定义属性,attr format取值类型

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"

/>

 

属性的声明: 

attrs.xml:

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <declare-styleable name="EditText">  

        <attr name="totalLength" format="integer" />  

        <attr name="eachLength" format="integer" />  

        <attr name="delimiter" format="string" />  

        <attr name="placeHolder" format="string" />  

    </declare-styleable> 

</resources>

属性的使用:

 

属性的获取

 

try {
   // 初始化属性
   TypedArray typedArray = context.obtainStyledAttributes(attrs,
     R.styleable.EditText);
   this.totalLength = typedArray.getInteger(
     R.styleable.EditText_totalLength, 0);
   this.eachLength = typedArray.getInteger(
     R.styleable.EditText_eachLength, 0);
   this.delimiter = typedArray
     .getString(R.styleable.EditText_delimiter);
   if (this.delimiter == null || this.delimiter.length() == 0) {
    this.delimiter = "-";
   }
   this.placeHolder = typedArray
     .getString(R.styleable.EditText_placeHolder);
   if (this.placeHolder == null || this.placeHolder.length() == 0) {
    this.placeHolder = "";
   }
   // Log.d("TAG",totalLength+", "+eachLength+", "+delimiter+", "+placeHolder);
   typedArray.recycle();
   // 初始化
   init();
   // 内容变化监听
   this.addTextChangedListener(new DivisionTextWatcher());
   // 获取焦点监听
   this.setOnFocusChangeListener(new DivisionFocusChangeListener());
  } catch (Exception e) {
   e.printStackTrace();
  }
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