2.aOS_UI控件

1.通用属性

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2.TextView

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text.setText(getString(R.string.app_name))

3.TextField

hint：默认文字 ； textColorHint：默认文字颜色

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4.点击事件

1>.内部类的方式，或者本类实现View.onClick...

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2>.匿名内部类

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3>.xml绑定点击方法

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5.ImageView

src: 图片资源属性，不会拉伸；background：会拉伸；

6.checkBox

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7.RadioButton必须放在RadioGroup中

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8.ToggleButton

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9.SeekBar进度条

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10.AlertDialog

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11.ArrayAdatper

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