Android Development Learning Diary Day3--textview,editview,imageview

Today we have learned some of the ways to use controls, including Textview,editview,imageview

1.TextView, output a text chant

The main attributes are

Android:id logo

Android:layout_width width

Android:layout_height height

Android:text text content

Android:textsize Text Size

Android:textcolor text color

Android:background background

2.EditView, enter a text

The main attributes are the same

In addition there are

Android:hint input Hint text

Android:inputtype Input Text Type

Here's the Hint property, unlike the Text property used in EditView

Simply put, if you set hint or text to "123"

When you enter "456"

Hint to "456"

And the text is "123456"

3.ImageView, a space for displaying pictures

property is almost

Another android:src image source

Two points to note here

1) Android:layout_width has three more special values

　　Match_parents: Enlarges the control so that it fills up all the space of its parent unit

Wrap_content: Expand controls based on content

Fill_parents: Rarely used after similar API2.2 to Match_parents

2) The difference between SRC and background

When you use SRC and background to load a picture at the same time

　　SRC does not fill the entire space, does not stretch according to the space size, background instead

Above

Android Development Learning Diary Day3--textview,editview,imageview