原生控件

TextView

• layout_width：
  • fill_parent(-1)： The view should be as big as its parent (minus padding). This constant is deprecated starting from API Level 8 and is replaced by {@code match_parent}.
  • match_parent(-1): The view should be as big as its parent (minus padding). This constant is deprecated starting from API Level 8 and is replaced by {@code match_parent}.
  • wrap_content(-2): The view should be only big enough to enclose its content (plus padding).
• layout_height:
  • 同layout_width
• TextView：
  • text:Text to display.
• View: Attributes that can be used with {@link android.view.View} or any of its subclasses. Also see {@link #ViewGroup_Layout} for attributes that are processed by the view's parent.
  • id：Supply an identifier name for this view, to later retrieve it
  • background：A drawable to use as the background. color颜色表示方法
• Theme：
  • gravity： Specifies how an object should position its content, on both the X and Y axes, within its own bounds.
  • textStyle:
    • normal（0）
    • bold（1）
    • italic（2）
• TextAppearance
  • shadowColor：Place a blurred shadow of text underneath the text, drawn with the specified color.
  • shadowRadius： Blur radius of the text shadow.
  • shadowDx：Horizontal offset of the text shadow.
  • shadowDy： Vertical offset of the text shadow.

• textView获取聚焦的方法：
  • clickable —— 点击后聚焦
  • TextView标签内添加标签 —— 自动聚焦
  • 自定义View，isFocused返回true —— 自动聚焦

Button

• Button属性
  • 更改button颜色是需要在themes文件中对parent字段加上.Bridge后缀
  • Button的background是一个选择器在不同状态下选择的内容如图所示
  • 
  • Button可视的内容从下到上依次是background，text，foreground，上层内容会将下层内容覆盖
• Button事件处理
  • Button事件触发顺序： OnTouch → OnLongClick → OnClick，在任一环节事件被消费（回调方法返回true）之后的事件就不会触发
  • 触摸事件分为三种：ACTION_DOWN(0), ACTION_DOWN(1), ACTION_MOVE(2)
  • 在xml中可以直接使用onclick属性添加对应的方法来实现setOnClickListener

EditText

• EditText属性
  • drawableLeft:在编辑框左侧添加图片
  • drawablePadding： 图片与输入文字的间距
  • hint：提示内容
  • inputType： 输入类型

ImageView

• ImageView属性
  • scaleType：Controls how the image should be resized or moved to match the size of this ImageView. 详将下图：
  • 
  • maxHeigh，maxWidth，adjustViewBounds三个属性联和使用，图片宽或高达到最大后按照原图比例自适应ImageView缩放

ProgressBar

• ProgressBar属性
  • style:进度条样式
  • max：Defines the maximum value.
  • progress：Defines the default progress value, between 0 and max.
  • indeterminate： Allows to enable the indeterminate mode. In this mode the progress bar plays an infinite looping animation.