android基礎(chǔ)入門教程2 2 4 framelayout幀布局

title:Android基礎(chǔ)入門教程——2.2.4FrameLayout(幀布局)categories:Android <rameLayoutandroid:id="@id/rameLayoutandroid:foregroundGravity="right android:background="#643"android:layout_width="android:layout_height="android:background="#7BE00"android:layout_width=" android:layout_height="2 00" </ step2:新建一個(gè)繼承View類的MeziView自定義組件類,在構(gòu)造方法中初始化view的stepstep3:重寫(xiě)onDraw()方法,實(shí)例化一個(gè)空的畫(huà)筆類Paintstep4:調(diào)用BitmapFactory.decodeResource()生成位圖對(duì)象step5:調(diào)用canvas.drawBitmap()繪制妹子的位圖對(duì)象step6:step7:在主Java代碼中獲取幀布局對(duì)象,并且實(shí)例化一個(gè)MeziViewstep8:會(huì)實(shí)例化的mezi對(duì)象添加一個(gè)觸摸事件的監(jiān)聽(tīng)器,重寫(xiě)onTouch方法,改變step9mezi<rameLayoutandroid:id="@id/mylayout"android:background="@drawable/back"></packagepackageimportimportimportandroid.graphics.BitmapimportimportimportpublicclassMeziViewextendsViewpublicfloatbitmapX;publicfloatpublicMeziView(Context{bitmapX=bitmapY=}2protectedvoidonDraw(Canvascanvas)Paintpaint=newBitmapbitmap=Bitmapcanvas.drawBitmap(bitmap,bitmapX,3{}}}packagepackageimportimportimportimportimportandroid.widget.importpublicclassMainActivityextends{protectedvoidonCreate(Bundlesaved{super.onCreate(savedrameLayoutframe=(rameLayout)findViewByfinalMeziViewmezi=new}3}}見(jiàn)步驟,很簡(jiǎn)單,就是自定義一個(gè)iew類,重寫(xiě)重繪方法,接著在Ativty中為他添加一個(gè)觸摸時(shí)間在觸摸時(shí)間中重寫(xiě)onTouh方法獲取點(diǎn)擊焦點(diǎn),另外還需要-5,不然那個(gè)坐標(biāo)是自定義iew的左上角,接著調(diào)用invaidate()重繪方法,最后添加到幀布局中而已!step1:定義一個(gè)空的FrameLayout布局,將前景圖像的位置設(shè)置為中央位置stepstep1:定義一個(gè)空的FrameLayout布局,將前景圖像的位置設(shè)置為中央位置step2:在Activity中獲取到該FrameLayout布局,新建一個(gè)Handler對(duì)象,重寫(xiě)handlerMessage()方法,調(diào)用圖像-更新的方法 step4:在onCreate()方法中新建一個(gè)計(jì)時(shí)器對(duì)象Timer,重寫(xiě)run方法,每隔170毫秒向<rameLayout<rameLayoutandroid:id="@id/myframe"</ packagecom.jay.example.framelayoutdemo3;importimportimportimportimportimportimport importandroid.widget. import importpublicclassMainActivityextendsActivityrameLayoutframe=//自定義一個(gè)用于定時(shí)更新U界面的handlerHandlerhandler=new{inti=2publicvoid{if(msg.what==0x{imove(i%8}}3voidmove(int{Drawablea=getResources().getDrawable(R.drawable.s_Drawableb=Drawablec=Drawabled=Drawablee=4 Drawablef=Drawableg=Drawableh=//通過(guò)setoreground{caseframe.setcase5frame.setcaseframe.setcaseframe.setcaseframe.set6caseframe.setcaseframe.setcaseframe.set7}}protectedvoidonCreate(BundlesavednstanceState)super.onCreate(savedframe=(rameLayout)findViewBy8Timer().schedule(newTimerTask()publicvoidrun()handler.sendEmptyMessage(0x代碼也很簡(jiǎn)單,就是定義一個(gè)handler對(duì)象來(lái)刷新幀布局的前