UI

Android

Android 3

srcJava

res()UIlayout _.

genR.java res R.java

Android XMLR.java

res/

drawable PNGJPGGIF drawable-hdpi ()

drawable-mdpi ()drawable-ldpi ()

layout UI layout ( main.xml)

values UI ( strings.xml )

XML

Android XML

XML (Extensible Markup Language)

Android

http://developer.android.com/guide/tutorials/views/index.html

LAYOUT

Hello World!

1

main.xml XML XML

2, 6 12

""(LinearLayout)LinearLayout

/

LinearLayout

3-5

LinearLayout layout android:

Android android:layout_widthandroid:layout_height

fill_parent"

LinearLayoutandroid:orientation()

vertical ()

7 11

TextView ()

8-10

TextView

android: layout_width fill_parent ( LinearLayout )

android:layout_heightwrap_content()

android:text TextView

1

2

7

12

res layoutactivity_main.xml GUI

layout

(layout)

LinearLayout()

FrameLayout()

TableLayout()

AbsoluteLayout()

RelativeLayout()

(View)

Linear LayoutHello,WorldtextView

Palette4 TextView()

EditText()

Button()

TextView()

Properties()Text Value

Layout

1

2

1

2

3

Properties()Text Value

main.xml

EditText TextView android:text EditText

1

6

Button () android:text

TextView()EditText()Button() LinearLayout ()main.xml

Layout

"" !

(reference) Button EditText XMLandroid:id

...android:id

name android:id

XML

res/values/strings.xml

app_name

XML strings.xml

strings.xml

Test Settings

Test Settings Hello world!

string main.xml

src/ csim.scu.test MainActivity.java

onCreatesavedInstanceStateBundle Bundle

Android savedInstanceState

@OverrideonCreatebmi onCreate

onCreate Activity onCreate

ActivityonCreateonCreatesuperonCreate super.onCreate(savedInstanceState);ActivityonCreateonCreate

package csim.scu.test; import android.os.Bundle; import android.app.Activity; // Android Package import android.view.Menu; public class MainActivity extends Activity { // @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //superBmi(Activity) Activity onCreate setContentView(R.layout.activity_main); } }

exercise TextView()EditText()Button()

http://ycajd.weebly.com/android2516327231250332999231243243353828330332.html

Intentbundle

helloscu +

animals