huong_dan_lap_trinh_voi_android_10

8/7/2019 huong_dan_lap_trinh_voi_android_10

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Trong bi ny mnh s hng dn cch to 1 custom ViewGroup, s dng

ViewGroup ny vo ListView, v cui cng l to 1 Option Menu. y cng s lbi cui cng mnh vit v lm vic vi View, cc bi sau s chuyn qua Intent vBroadCast Receiver.

Custom ViewGroupViewGroup thng thng chng ta hay gp l LinearLayout, Relative Layout. Xydng custom ViewGroup cho php chng ta to 1 tp cc widget c sp xptheo mun ri a vo s dng.

Yu cu: Xy dng ng dng dng To Do List: Cho php nhp vo ni dung cng

vic v thi gian thc hin cng vic ri a vo list cng vic. Cho php xa cccng vic khi list.

B1:Khi to project: File -> New -> Android ProjectProject name: Example 3

Build Target: Chn Android 1.5Application name: Example 3

Package name: at.exam

Create Activity: Example

=> Kch nt Finish.

B2:Xy dng custom view group trong XML. i ti res\layout to 1 file XMLmi l list.xml. G ni dung sau vo:M:


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android:layout_height="wrap_content"android:text=""android:paddingTop="45px"android:paddingRight="10px"

/>

Custom ViewGroup ca chng ta y kh n gin, l 1 LinearLayout cha 2thnh phn: 1 CheckBox v 1 LinearLayout khc gm 2 TextView hin th nidung cng vic v thi gian.

B3: xong giao din cho custom ViewGroup, chng ta s thit k giao din chochng trnh trong main.xml. y mnh dng li giao din ca Example 2 trongbi 2.M:


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#ffffff#cccccc#cccccc

work_colorl mu ca ni dung cng vic trong list. time_colormu ca thi giancng vic. hint_colormu ca text hint (dng hng dn) cc EditText.

huong_dan_lap_trinh_voi_android_10

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