Android的ProgressBar样式||||||style="?android:attr/progressBarStyleSmall"|||系统预置定义样式的用法是?android:attr/x

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1、Android的ProgressBar样式：
style="?android:attr/progressBarStyleHorizontal" 长形进度条

style="?android:attr/progressBarStyleLarge" 超大号圆形ProgressBar

style="?android:attr/progressBarStyleSmall" 小号圆形ProgressBar

style="?android:attr/progressBarStyleSmallTitle" 标题型圆形ProgressBar

2、对于能够显示文字的控件（如TextView EditText RadioButton Button CheckBox Chronometer等等），有时需要控制字体的大小。Android平台定义了三种字体大小。

"?android:attr/textAppearanceLarge"

"?android:attr/textAppearanceMedium"

"?android:attr/textAppearanceSmall"

使用方法为：

    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textAppearance="?android:attr/textAppearanceMedium"
   android:textAppearance="?android:attr/textAppearanceSmall"

或

    style="?android:attr/textAppearanceLarge"
    style="?android:attr/textAppearanceMedium"
    style="?android:attr/textAppearanceSmall"

3、字体大小
对于能够显示文字的控件（如TextView EditText RadioButton Button CheckBox Chronometer等等），你有时需要控制字体的大小。Android平台定义了三种字体大小。
"?android:attr/textAppearanceLarge"
"?android:attr/textAppearanceMedium"
"?android:attr/textAppearanceSmall"
使用方法为：
android:textAppearance="?android:attr/textAppearanceLarge"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textAppearance="?android:attr/textAppearanceSmall"
或
style="?android:attr/textAppearanceLarge"
style="?android:attr/textAppearanceMedium"
style="?android:attr/textAppearanceSmall"
字体颜色
android:textColor="?android:attr/textColorPrimary"
android:textColor="?android:attr/textColorSecondary"
android:textColor="?android:attr/textColorTertiary"
android:textColor="?android:attr/textColorPrimaryInverse"
android:textColor="?android:attr/textColorSecondaryInverse"
ProgressBar
style="?android:attr/progressBarStyleHorizontal"
style="?android:attr/progressBarStyleLarge"
style="?android:attr/progressBarStyleSmall"
style="?android:attr/progressBarStyleSmallTitle"

更多细节可参考SDK文档的R.attr类。

这个是Android預置定義樣式。不同的版本值是不同的

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